Merge pull request #11886 from t895/kotlin-ui

Android: Convert "ui" package to Kotlin

20 files changed, 1321 insertions, 1607 deletions

diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/NVidiaShieldWorkaroundView.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/NVidiaShieldWorkaroundView.java
deleted file mode 100644
index 4b4b763c2b..0000000000
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/NVidiaShieldWorkaroundView.java
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * Copyright 2013 Dolphin Emulator Project
- * SPDX-License-Identifier: GPL-2.0-or-later
- */
-
-package org.dolphinemu.dolphinemu.ui;
-
-import android.content.Context;
-import android.util.AttributeSet;
-import android.view.View;
-
-/**
- * Work around a bug with the nVidia Shield.
- *
- * Without this View, the emulation SurfaceView acts like it has the
- * highest Z-value, blocking any other View, such as the menu fragments.
- */
-public final class NVidiaShieldWorkaroundView extends View
-{
-  public NVidiaShieldWorkaroundView(Context context, AttributeSet attrs)
-  {
-    super(context, attrs);
-
-    // Setting this seems to workaround the bug
-    setWillNotDraw(false);
-  }
-}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/NVidiaShieldWorkaroundView.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/NVidiaShieldWorkaroundView.kt
new file mode 100644
index 0000000000..16679e2c5f
--- /dev/null
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/NVidiaShieldWorkaroundView.kt
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.dolphinemu.dolphinemu.ui
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.View
+
+/**
+ * Work around a bug with the nVidia Shield.
+ *
+ *
+ * Without this View, the emulation SurfaceView acts like it has the
+ * highest Z-value, blocking any other View, such as the menu fragments.
+ */
+class NVidiaShieldWorkaroundView(context: Context?, attrs: AttributeSet?) : View(context, attrs) {
+    init {
+        // Setting this seems to workaround the bug
+        setWillNotDraw(false)
+    }
+}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/CustomTitleView.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/CustomTitleView.java
deleted file mode 100644
index 08e4777303..0000000000
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/CustomTitleView.java
+++ /dev/null
@@ -1,85 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-package org.dolphinemu.dolphinemu.ui.main;
-
-import android.content.Context;
-import android.graphics.drawable.Drawable;
-import android.util.AttributeSet;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.widget.LinearLayout;
-import android.widget.TextView;
-
-import androidx.leanback.widget.TitleViewAdapter;
-
-import org.dolphinemu.dolphinemu.R;
-
-public class CustomTitleView extends LinearLayout implements TitleViewAdapter.Provider
-{
-  private final TextView mTitleView;
-  private final View mBadgeView;
-
-  private final TitleViewAdapter mTitleViewAdapter = new TitleViewAdapter()
-  {
-    @Override
-    public View getSearchAffordanceView()
-    {
-      return null;
-    }
-
-    @Override
-    public void setTitle(CharSequence titleText)
-    {
-      CustomTitleView.this.setTitle(titleText);
-    }
-
-    @Override
-    public void setBadgeDrawable(Drawable drawable)
-    {
-      CustomTitleView.this.setBadgeDrawable(drawable);
-    }
-  };
-
-  public CustomTitleView(Context context)
-  {
-    this(context, null);
-  }
-
-  public CustomTitleView(Context context, AttributeSet attrs)
-  {
-    this(context, attrs, 0);
-  }
-
-  public CustomTitleView(Context context, AttributeSet attrs, int defStyle)
-  {
-    super(context, attrs, defStyle);
-    View root = LayoutInflater.from(context).inflate(R.layout.tv_title, this);
-    mTitleView = root.findViewById(R.id.title);
-    mBadgeView = root.findViewById(R.id.badge);
-  }
-
-  public void setTitle(CharSequence title)
-  {
-    if (title != null)
-    {
-      mTitleView.setText(title);
-      mTitleView.setVisibility(View.VISIBLE);
-      mBadgeView.setVisibility(View.VISIBLE);
-    }
-  }
-
-  public void setBadgeDrawable(Drawable drawable)
-  {
-    if (drawable != null)
-    {
-      mTitleView.setVisibility(View.GONE);
-      mBadgeView.setVisibility(View.VISIBLE);
-    }
-  }
-
-  @Override
-  public TitleViewAdapter getTitleViewAdapter()
-  {
-    return mTitleViewAdapter;
-  }
-}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/CustomTitleView.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/CustomTitleView.kt
new file mode 100644
index 0000000000..35f69195e9
--- /dev/null
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/CustomTitleView.kt
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.dolphinemu.dolphinemu.ui.main
+
+import android.content.Context
+import android.graphics.drawable.Drawable
+import android.util.AttributeSet
+import android.view.LayoutInflater
+import android.view.View
+import android.widget.LinearLayout
+import android.widget.TextView
+import androidx.leanback.widget.TitleViewAdapter
+import org.dolphinemu.dolphinemu.R
+
+class CustomTitleView @JvmOverloads constructor(
+    context: Context?,
+    attrs: AttributeSet? = null,
+    defStyle: Int = 0
+) : LinearLayout(context, attrs, defStyle), TitleViewAdapter.Provider {
+    private val titleView: TextView
+    private val badgeView: View
+    private val titleViewAdapter: TitleViewAdapter = object : TitleViewAdapter() {
+        override fun getSearchAffordanceView(): View? = null
+
+        override fun setTitle(titleText: CharSequence?) = this@CustomTitleView.setTitle(titleText)
+
+        override fun setBadgeDrawable(drawable: Drawable?) =
+            this@CustomTitleView.setBadgeDrawable(drawable)
+    }
+
+    init {
+        val root = LayoutInflater.from(context).inflate(R.layout.tv_title, this)
+        titleView = root.findViewById(R.id.title)
+        badgeView = root.findViewById(R.id.badge)
+    }
+
+    fun setTitle(title: CharSequence?) {
+        if (title != null) {
+            titleView.text = title
+            titleView.visibility = VISIBLE
+            badgeView.visibility = VISIBLE
+        }
+    }
+
+    fun setBadgeDrawable(drawable: Drawable?) {
+        if (drawable != null) {
+            titleView.visibility = GONE
+            badgeView.visibility = VISIBLE
+        }
+    }
+
+    override fun getTitleViewAdapter(): TitleViewAdapter = titleViewAdapter
+}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainActivity.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainActivity.java
deleted file mode 100644
index 488f0909df..0000000000
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainActivity.java
+++ /dev/null
@@ -1,441 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-package org.dolphinemu.dolphinemu.ui.main;
-
-import android.content.Intent;
-import android.content.pm.PackageManager;
-import android.net.Uri;
-import android.os.Bundle;
-import android.view.Menu;
-import android.view.MenuInflater;
-import android.view.MenuItem;
-import android.view.ViewGroup;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.core.graphics.Insets;
-import androidx.core.splashscreen.SplashScreen;
-import androidx.core.view.ViewCompat;
-import androidx.core.view.WindowCompat;
-import androidx.core.view.WindowInsetsCompat;
-import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
-
-import com.google.android.material.color.MaterialColors;
-import com.google.android.material.tabs.TabLayout;
-
-import org.dolphinemu.dolphinemu.fragments.GridOptionDialogFragment;
-import org.dolphinemu.dolphinemu.R;
-import org.dolphinemu.dolphinemu.activities.EmulationActivity;
-import org.dolphinemu.dolphinemu.adapters.PlatformPagerAdapter;
-import org.dolphinemu.dolphinemu.databinding.ActivityMainBinding;
-import org.dolphinemu.dolphinemu.features.settings.model.IntSetting;
-import org.dolphinemu.dolphinemu.features.settings.model.NativeConfig;
-import org.dolphinemu.dolphinemu.features.settings.ui.MenuTag;
-import org.dolphinemu.dolphinemu.features.settings.ui.SettingsActivity;
-import org.dolphinemu.dolphinemu.services.GameFileCacheManager;
-import org.dolphinemu.dolphinemu.ui.platform.Platform;
-import org.dolphinemu.dolphinemu.ui.platform.PlatformGamesView;
-import org.dolphinemu.dolphinemu.utils.Action1;
-import org.dolphinemu.dolphinemu.utils.AfterDirectoryInitializationRunner;
-import org.dolphinemu.dolphinemu.utils.DirectoryInitialization;
-import org.dolphinemu.dolphinemu.utils.FileBrowserHelper;
-import org.dolphinemu.dolphinemu.utils.InsetsHelper;
-import org.dolphinemu.dolphinemu.utils.PermissionsHandler;
-import org.dolphinemu.dolphinemu.utils.StartupHandler;
-import org.dolphinemu.dolphinemu.utils.ThemeHelper;
-import org.dolphinemu.dolphinemu.utils.WiiUtils;
-
-/**
- * The main Activity of the Lollipop style UI. Manages several PlatformGamesFragments, which
- * individually display a grid of available games for each Fragment, in a tabbed layout.
- */
-public final class MainActivity extends AppCompatActivity
-        implements MainView, SwipeRefreshLayout.OnRefreshListener, ThemeProvider
-{
-  private int mThemeId;
-
-  private final MainPresenter mPresenter = new MainPresenter(this, this);
-
-  private ActivityMainBinding mBinding;
-
-  @Override
-  protected void onCreate(Bundle savedInstanceState)
-  {
-    SplashScreen splashScreen = SplashScreen.installSplashScreen(this);
-    splashScreen.setKeepOnScreenCondition(
-            () -> !DirectoryInitialization.areDolphinDirectoriesReady());
-
-    ThemeHelper.setTheme(this);
-
-    super.onCreate(savedInstanceState);
-
-    mBinding = ActivityMainBinding.inflate(getLayoutInflater());
-    setContentView(mBinding.getRoot());
-
-    WindowCompat.setDecorFitsSystemWindows(getWindow(), false);
-    setInsets();
-    ThemeHelper.enableStatusBarScrollTint(this, mBinding.appbarMain);
-
-    mBinding.toolbarMain.setTitle(R.string.app_name);
-    setSupportActionBar(mBinding.toolbarMain);
-
-    // Set up the FAB.
-    mBinding.buttonAddDirectory.setOnClickListener(view -> mPresenter.onFabClick());
-    mBinding.appbarMain.addOnOffsetChangedListener((appBarLayout, verticalOffset) ->
-    {
-      if (verticalOffset == 0)
-      {
-        mBinding.buttonAddDirectory.extend();
-      }
-      else if (appBarLayout.getTotalScrollRange() == -verticalOffset)
-      {
-        mBinding.buttonAddDirectory.shrink();
-      }
-    });
-
-    mPresenter.onCreate();
-
-    // Stuff in this block only happens when this activity is newly created (i.e. not a rotation)
-    if (savedInstanceState == null)
-    {
-      StartupHandler.HandleInit(this);
-      new AfterDirectoryInitializationRunner().runWithLifecycle(this, this::checkTheme);
-    }
-
-    if (!DirectoryInitialization.isWaitingForWriteAccess(this))
-    {
-      new AfterDirectoryInitializationRunner()
-              .runWithLifecycle(this, this::setPlatformTabsAndStartGameFileCacheService);
-    }
-  }
-
-  @Override
-  protected void onResume()
-  {
-    ThemeHelper.setCorrectTheme(this);
-
-    super.onResume();
-
-    if (DirectoryInitialization.shouldStart(this))
-    {
-      DirectoryInitialization.start(this);
-      new AfterDirectoryInitializationRunner()
-              .runWithLifecycle(this, this::setPlatformTabsAndStartGameFileCacheService);
-    }
-
-    mPresenter.onResume();
-  }
-
-  @Override
-  protected void onDestroy()
-  {
-    super.onDestroy();
-    mPresenter.onDestroy();
-  }
-
-  @Override
-  protected void onStart()
-  {
-    super.onStart();
-    StartupHandler.checkSessionReset(this);
-  }
-
-  @Override
-  protected void onStop()
-  {
-    super.onStop();
-
-    if (isChangingConfigurations())
-    {
-      MainPresenter.skipRescanningLibrary();
-    }
-    else if (DirectoryInitialization.areDolphinDirectoriesReady())
-    {
-      // If the currently selected platform tab changed, save it to disk
-      NativeConfig.save(NativeConfig.LAYER_BASE);
-    }
-
-    StartupHandler.setSessionTime(this);
-  }
-
-  @Override
-  public boolean onCreateOptionsMenu(Menu menu)
-  {
-    MenuInflater inflater = getMenuInflater();
-    inflater.inflate(R.menu.menu_game_grid, menu);
-
-    if (WiiUtils.isSystemMenuInstalled())
-    {
-      int resId = WiiUtils.isSystemMenuvWii() ?
-              R.string.grid_menu_load_vwii_system_menu_installed :
-              R.string.grid_menu_load_wii_system_menu_installed;
-
-      menu.findItem(R.id.menu_load_wii_system_menu).setTitle(
-              getString(resId, WiiUtils.getSystemMenuVersion()));
-    }
-
-    return true;
-  }
-
-  /**
-   * MainView
-   */
-
-  @Override
-  public void setVersionString(String version)
-  {
-    mBinding.toolbarMain.setSubtitle(version);
-  }
-
-  @Override
-  public void launchSettingsActivity(MenuTag menuTag)
-  {
-    SettingsActivity.launch(this, menuTag);
-  }
-
-  @Override
-  public void launchFileListActivity()
-  {
-    if (DirectoryInitialization.preferOldFolderPicker(this))
-    {
-      FileBrowserHelper.openDirectoryPicker(this, FileBrowserHelper.GAME_EXTENSIONS);
-    }
-    else
-    {
-      Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
-      startActivityForResult(intent, MainPresenter.REQUEST_DIRECTORY);
-    }
-  }
-
-  @Override
-  public void launchOpenFileActivity(int requestCode)
-  {
-    Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
-    intent.addCategory(Intent.CATEGORY_OPENABLE);
-    intent.setType("*/*");
-    startActivityForResult(intent, requestCode);
-  }
-
-  /**
-   * @param requestCode An int describing whether the Activity that is returning did so successfully.
-   * @param resultCode  An int describing what Activity is giving us this callback.
-   * @param result      The information the returning Activity is providing us.
-   */
-  @Override
-  protected void onActivityResult(int requestCode, int resultCode, Intent result)
-  {
-    super.onActivityResult(requestCode, resultCode, result);
-
-    // If the user picked a file, as opposed to just backing out.
-    if (resultCode == RESULT_OK)
-    {
-      Uri uri = result.getData();
-      switch (requestCode)
-      {
-        case MainPresenter.REQUEST_DIRECTORY:
-          if (DirectoryInitialization.preferOldFolderPicker(this))
-          {
-            mPresenter.onDirectorySelected(FileBrowserHelper.getSelectedPath(result));
-          }
-          else
-          {
-            mPresenter.onDirectorySelected(result);
-          }
-          break;
-
-        case MainPresenter.REQUEST_GAME_FILE:
-          FileBrowserHelper.runAfterExtensionCheck(this, uri,
-                  FileBrowserHelper.GAME_LIKE_EXTENSIONS,
-                  () -> EmulationActivity.launch(this, result.getData().toString(), false));
-          break;
-
-        case MainPresenter.REQUEST_WAD_FILE:
-          FileBrowserHelper.runAfterExtensionCheck(this, uri, FileBrowserHelper.WAD_EXTENSION,
-                  () -> mPresenter.installWAD(result.getData().toString()));
-          break;
-
-        case MainPresenter.REQUEST_WII_SAVE_FILE:
-          FileBrowserHelper.runAfterExtensionCheck(this, uri, FileBrowserHelper.BIN_EXTENSION,
-                  () -> mPresenter.importWiiSave(result.getData().toString()));
-          break;
-
-        case MainPresenter.REQUEST_NAND_BIN_FILE:
-          FileBrowserHelper.runAfterExtensionCheck(this, uri, FileBrowserHelper.BIN_EXTENSION,
-                  () -> mPresenter.importNANDBin(result.getData().toString()));
-          break;
-      }
-    }
-    else
-    {
-      MainPresenter.skipRescanningLibrary();
-    }
-  }
-
-  @Override
-  public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
-          @NonNull int[] grantResults)
-  {
-    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
-
-    if (requestCode == PermissionsHandler.REQUEST_CODE_WRITE_PERMISSION)
-    {
-      if (grantResults[0] == PackageManager.PERMISSION_DENIED)
-      {
-        PermissionsHandler.setWritePermissionDenied();
-      }
-
-      DirectoryInitialization.start(this);
-      new AfterDirectoryInitializationRunner()
-              .runWithLifecycle(this, this::setPlatformTabsAndStartGameFileCacheService);
-    }
-  }
-
-  /**
-   * Called by the framework whenever any actionbar/toolbar icon is clicked.
-   *
-   * @param item The icon that was clicked on.
-   * @return True if the event was handled, false to bubble it up to the OS.
-   */
-  @Override
-  public boolean onOptionsItemSelected(MenuItem item)
-  {
-    return mPresenter.handleOptionSelection(item.getItemId(), this);
-  }
-
-  /**
-   * Called when the user requests a refresh by swiping down.
-   */
-  @Override
-  public void onRefresh()
-  {
-    setRefreshing(true);
-    GameFileCacheManager.startRescan();
-  }
-
-  /**
-   * Shows or hides the loading indicator.
-   */
-  @Override
-  public void setRefreshing(boolean refreshing)
-  {
-    forEachPlatformGamesView(view -> view.setRefreshing(refreshing));
-  }
-
-  /**
-   * To be called when the game file cache is updated.
-   */
-  @Override
-  public void showGames()
-  {
-    forEachPlatformGamesView(PlatformGamesView::showGames);
-  }
-
-  @Override
-  public void reloadGrid()
-  {
-    forEachPlatformGamesView(PlatformGamesView::refetchMetadata);
-  }
-
-  @Override
-  public void showGridOptions()
-  {
-    new GridOptionDialogFragment().show(getSupportFragmentManager(), "gridOptions");
-  }
-
-  private void forEachPlatformGamesView(Action1<PlatformGamesView> action)
-  {
-    for (Platform platform : Platform.values())
-    {
-      PlatformGamesView fragment = getPlatformGamesView(platform);
-      if (fragment != null)
-      {
-        action.call(fragment);
-      }
-    }
-  }
-
-  @Nullable
-  private PlatformGamesView getPlatformGamesView(Platform platform)
-  {
-    String fragmentTag =
-            "android:switcher:" + mBinding.pagerPlatforms.getId() + ":" + platform.toInt();
-
-    return (PlatformGamesView) getSupportFragmentManager().findFragmentByTag(fragmentTag);
-  }
-
-  // Don't call this before DirectoryInitialization completes.
-  private void setPlatformTabsAndStartGameFileCacheService()
-  {
-    PlatformPagerAdapter platformPagerAdapter = new PlatformPagerAdapter(
-            getSupportFragmentManager(), this);
-    mBinding.pagerPlatforms.setAdapter(platformPagerAdapter);
-    mBinding.pagerPlatforms.setOffscreenPageLimit(platformPagerAdapter.getCount());
-    mBinding.tabsPlatforms.setupWithViewPager(mBinding.pagerPlatforms);
-    mBinding.tabsPlatforms.addOnTabSelectedListener(
-            new TabLayout.ViewPagerOnTabSelectedListener(mBinding.pagerPlatforms)
-            {
-              @Override
-              public void onTabSelected(@NonNull TabLayout.Tab tab)
-              {
-                super.onTabSelected(tab);
-                IntSetting.MAIN_LAST_PLATFORM_TAB.setInt(NativeConfig.LAYER_BASE,
-                        tab.getPosition());
-              }
-            });
-
-    for (int i = 0; i < PlatformPagerAdapter.TAB_ICONS.length; i++)
-    {
-      mBinding.tabsPlatforms.getTabAt(i).setIcon(PlatformPagerAdapter.TAB_ICONS[i]);
-    }
-
-    mBinding.pagerPlatforms.setCurrentItem(IntSetting.MAIN_LAST_PLATFORM_TAB.getInt());
-
-    showGames();
-    GameFileCacheManager.startLoad();
-  }
-
-  @Override
-  public void setTheme(int themeId)
-  {
-    super.setTheme(themeId);
-    this.mThemeId = themeId;
-  }
-
-  @Override
-  public int getThemeId()
-  {
-    return mThemeId;
-  }
-
-  private void checkTheme()
-  {
-    ThemeHelper.setCorrectTheme(this);
-  }
-
-  private void setInsets()
-  {
-    ViewCompat.setOnApplyWindowInsetsListener(mBinding.appbarMain, (v, windowInsets) ->
-    {
-      Insets insets = windowInsets.getInsets(WindowInsetsCompat.Type.systemBars());
-
-      InsetsHelper.insetAppBar(insets, mBinding.appbarMain);
-
-      ViewGroup.MarginLayoutParams mlpFab =
-              (ViewGroup.MarginLayoutParams) mBinding.buttonAddDirectory.getLayoutParams();
-      int fabPadding = getResources().getDimensionPixelSize(R.dimen.spacing_large);
-      mlpFab.leftMargin = insets.left + fabPadding;
-      mlpFab.bottomMargin = insets.bottom + fabPadding;
-      mlpFab.rightMargin = insets.right + fabPadding;
-      mBinding.buttonAddDirectory.setLayoutParams(mlpFab);
-
-      mBinding.pagerPlatforms.setPadding(insets.left, 0, insets.right, 0);
-
-      InsetsHelper.applyNavbarWorkaround(insets.bottom, mBinding.workaroundView);
-      ThemeHelper.setNavigationBarColor(this,
-              MaterialColors.getColor(mBinding.appbarMain, R.attr.colorSurface));
-
-      return windowInsets;
-    });
-  }
-}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainActivity.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainActivity.kt
new file mode 100644
index 0000000000..84d870c921
--- /dev/null
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainActivity.kt
@@ -0,0 +1,327 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.dolphinemu.dolphinemu.ui.main
+
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.os.Bundle
+import android.view.Menu
+import android.view.MenuItem
+import android.view.View
+import android.view.ViewGroup.MarginLayoutParams
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowCompat
+import androidx.core.view.WindowInsetsCompat
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout.OnRefreshListener
+import com.google.android.material.appbar.AppBarLayout
+import com.google.android.material.color.MaterialColors
+import com.google.android.material.tabs.TabLayout
+import org.dolphinemu.dolphinemu.R
+import org.dolphinemu.dolphinemu.activities.EmulationActivity
+import org.dolphinemu.dolphinemu.adapters.PlatformPagerAdapter
+import org.dolphinemu.dolphinemu.databinding.ActivityMainBinding
+import org.dolphinemu.dolphinemu.features.settings.model.IntSetting
+import org.dolphinemu.dolphinemu.features.settings.model.NativeConfig
+import org.dolphinemu.dolphinemu.features.settings.ui.MenuTag
+import org.dolphinemu.dolphinemu.features.settings.ui.SettingsActivity
+import org.dolphinemu.dolphinemu.fragments.GridOptionDialogFragment
+import org.dolphinemu.dolphinemu.services.GameFileCacheManager
+import org.dolphinemu.dolphinemu.ui.platform.Platform
+import org.dolphinemu.dolphinemu.ui.platform.PlatformGamesView
+import org.dolphinemu.dolphinemu.utils.Action1
+import org.dolphinemu.dolphinemu.utils.AfterDirectoryInitializationRunner
+import org.dolphinemu.dolphinemu.utils.DirectoryInitialization
+import org.dolphinemu.dolphinemu.utils.FileBrowserHelper
+import org.dolphinemu.dolphinemu.utils.InsetsHelper
+import org.dolphinemu.dolphinemu.utils.PermissionsHandler
+import org.dolphinemu.dolphinemu.utils.StartupHandler
+import org.dolphinemu.dolphinemu.utils.ThemeHelper
+import org.dolphinemu.dolphinemu.utils.WiiUtils
+
+class MainActivity : AppCompatActivity(), MainView, OnRefreshListener, ThemeProvider {
+    override var themeId = 0
+
+    private val presenter = MainPresenter(this, this)
+
+    private lateinit var binding: ActivityMainBinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        installSplashScreen().setKeepOnScreenCondition { !DirectoryInitialization.areDolphinDirectoriesReady() }
+
+        ThemeHelper.setTheme(this)
+
+        super.onCreate(savedInstanceState)
+
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        WindowCompat.setDecorFitsSystemWindows(window, false)
+        setInsets()
+        ThemeHelper.enableStatusBarScrollTint(this, binding.appbarMain)
+
+        binding.toolbarMain.setTitle(R.string.app_name)
+        setSupportActionBar(binding.toolbarMain)
+
+        // Set up the FAB.
+        binding.buttonAddDirectory.setOnClickListener { presenter.onFabClick() }
+        binding.appbarMain.addOnOffsetChangedListener { appBarLayout: AppBarLayout, verticalOffset: Int ->
+            if (verticalOffset == 0) {
+                binding.buttonAddDirectory.extend()
+            } else if (appBarLayout.totalScrollRange == -verticalOffset) {
+                binding.buttonAddDirectory.shrink()
+            }
+        }
+
+        presenter.onCreate()
+
+        // Stuff in this block only happens when this activity is newly created (i.e. not a rotation)
+        if (savedInstanceState == null) {
+            StartupHandler.HandleInit(this)
+            AfterDirectoryInitializationRunner().runWithLifecycle(this) {
+                ThemeHelper.setCorrectTheme(this)
+            }
+        }
+        if (!DirectoryInitialization.isWaitingForWriteAccess(this)) {
+            AfterDirectoryInitializationRunner()
+                .runWithLifecycle(this) { setPlatformTabsAndStartGameFileCacheService() }
+        }
+    }
+
+    override fun onResume() {
+        ThemeHelper.setCorrectTheme(this)
+
+        super.onResume()
+        if (DirectoryInitialization.shouldStart(this)) {
+            DirectoryInitialization.start(this)
+            AfterDirectoryInitializationRunner()
+                .runWithLifecycle(this) { setPlatformTabsAndStartGameFileCacheService() }
+        }
+
+        presenter.onResume()
+    }
+
+    override fun onStart() {
+        super.onStart()
+        StartupHandler.checkSessionReset(this)
+    }
+
+    override fun onStop() {
+        super.onStop()
+        if (isChangingConfigurations) {
+            MainPresenter.skipRescanningLibrary()
+        } else if (DirectoryInitialization.areDolphinDirectoriesReady()) {
+            // If the currently selected platform tab changed, save it to disk
+            NativeConfig.save(NativeConfig.LAYER_BASE)
+        }
+
+        StartupHandler.setSessionTime(this)
+    }
+
+    override fun onCreateOptionsMenu(menu: Menu): Boolean {
+        menuInflater.inflate(R.menu.menu_game_grid, menu)
+        if (WiiUtils.isSystemMenuInstalled()) {
+            val resId =
+                if (WiiUtils.isSystemMenuvWii()) R.string.grid_menu_load_vwii_system_menu_installed else R.string.grid_menu_load_wii_system_menu_installed
+            menu.findItem(R.id.menu_load_wii_system_menu).title =
+                getString(resId, WiiUtils.getSystemMenuVersion())
+        }
+        return true
+    }
+
+    /**
+     * MainView
+     */
+    override fun setVersionString(version: String) {
+        binding.toolbarMain.subtitle = version
+    }
+
+    override fun launchSettingsActivity(menuTag: MenuTag?) {
+        SettingsActivity.launch(this, menuTag)
+    }
+
+    override fun launchFileListActivity() {
+        if (DirectoryInitialization.preferOldFolderPicker(this)) {
+            FileBrowserHelper.openDirectoryPicker(this, FileBrowserHelper.GAME_EXTENSIONS)
+        } else {
+            val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE)
+            startActivityForResult(intent, MainPresenter.REQUEST_DIRECTORY)
+        }
+    }
+
+    override fun launchOpenFileActivity(requestCode: Int) {
+        val intent = Intent(Intent.ACTION_OPEN_DOCUMENT)
+        intent.addCategory(Intent.CATEGORY_OPENABLE)
+        intent.type = "*/*"
+        startActivityForResult(intent, requestCode)
+    }
+
+    /**
+     * @param requestCode An int describing whether the Activity that is returning did so successfully.
+     * @param resultCode  An int describing what Activity is giving us this callback.
+     * @param result      The information the returning Activity is providing us.
+     */
+    override fun onActivityResult(requestCode: Int, resultCode: Int, result: Intent?) {
+        super.onActivityResult(requestCode, resultCode, result)
+
+        // If the user picked a file, as opposed to just backing out.
+        if (resultCode == RESULT_OK) {
+            val uri = result!!.data
+            when (requestCode) {
+                MainPresenter.REQUEST_DIRECTORY -> {
+                    if (DirectoryInitialization.preferOldFolderPicker(this)) {
+                        presenter.onDirectorySelected(FileBrowserHelper.getSelectedPath(result))
+                    } else {
+                        presenter.onDirectorySelected(result)
+                    }
+                }
+
+                MainPresenter.REQUEST_GAME_FILE -> FileBrowserHelper.runAfterExtensionCheck(
+                    this, uri, FileBrowserHelper.GAME_LIKE_EXTENSIONS
+                ) { EmulationActivity.launch(this, result.data.toString(), false) }
+
+                MainPresenter.REQUEST_WAD_FILE -> FileBrowserHelper.runAfterExtensionCheck(
+                    this, uri, FileBrowserHelper.WAD_EXTENSION
+                ) { presenter.installWAD(result.data.toString()) }
+
+                MainPresenter.REQUEST_WII_SAVE_FILE -> FileBrowserHelper.runAfterExtensionCheck(
+                    this, uri, FileBrowserHelper.BIN_EXTENSION
+                ) { presenter.importWiiSave(result.data.toString()) }
+
+                MainPresenter.REQUEST_NAND_BIN_FILE -> FileBrowserHelper.runAfterExtensionCheck(
+                    this, uri, FileBrowserHelper.BIN_EXTENSION
+                ) { presenter.importNANDBin(result.data.toString()) }
+            }
+        } else {
+            MainPresenter.skipRescanningLibrary()
+        }
+    }
+
+    override fun onRequestPermissionsResult(
+        requestCode: Int,
+        permissions: Array<String>,
+        grantResults: IntArray
+    ) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
+        if (requestCode == PermissionsHandler.REQUEST_CODE_WRITE_PERMISSION) {
+            if (grantResults[0] == PackageManager.PERMISSION_DENIED) {
+                PermissionsHandler.setWritePermissionDenied()
+            }
+
+            DirectoryInitialization.start(this)
+            AfterDirectoryInitializationRunner()
+                .runWithLifecycle(this) { setPlatformTabsAndStartGameFileCacheService() }
+        }
+    }
+
+    /**
+     * Called by the framework whenever any actionbar/toolbar icon is clicked.
+     *
+     * @param item The icon that was clicked on.
+     * @return True if the event was handled, false to bubble it up to the OS.
+     */
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        return presenter.handleOptionSelection(item.itemId, this)
+    }
+
+    /**
+     * Called when the user requests a refresh by swiping down.
+     */
+    override fun onRefresh() {
+        setRefreshing(true)
+        GameFileCacheManager.startRescan()
+    }
+
+    /**
+     * Shows or hides the loading indicator.
+     */
+    override fun setRefreshing(refreshing: Boolean) =
+        forEachPlatformGamesView { view: PlatformGamesView -> view.setRefreshing(refreshing) }
+
+    /**
+     * To be called when the game file cache is updated.
+     */
+    override fun showGames() =
+        forEachPlatformGamesView { obj: PlatformGamesView -> obj.showGames() }
+
+    override fun reloadGrid() {
+        forEachPlatformGamesView { obj: PlatformGamesView -> obj.refetchMetadata() }
+    }
+
+    override fun showGridOptions() =
+        GridOptionDialogFragment().show(supportFragmentManager, "gridOptions")
+
+    private fun forEachPlatformGamesView(action: Action1<PlatformGamesView>) {
+        for (platform in Platform.values()) {
+            val fragment = getPlatformGamesView(platform)
+            if (fragment != null) {
+                action.call(fragment)
+            }
+        }
+    }
+
+    private fun getPlatformGamesView(platform: Platform): PlatformGamesView? {
+        val fragmentTag =
+            "android:switcher:" + binding.pagerPlatforms.id + ":" + platform.toInt()
+        return supportFragmentManager.findFragmentByTag(fragmentTag) as PlatformGamesView?
+    }
+
+    // Don't call this before DirectoryInitialization completes.
+    private fun setPlatformTabsAndStartGameFileCacheService() {
+        val platformPagerAdapter = PlatformPagerAdapter(
+            supportFragmentManager, this
+        )
+        binding.pagerPlatforms.adapter = platformPagerAdapter
+        binding.pagerPlatforms.offscreenPageLimit = platformPagerAdapter.count
+        binding.tabsPlatforms.setupWithViewPager(binding.pagerPlatforms)
+        binding.tabsPlatforms.addOnTabSelectedListener(
+            object : TabLayout.ViewPagerOnTabSelectedListener(binding.pagerPlatforms) {
+                override fun onTabSelected(tab: TabLayout.Tab) {
+                    super.onTabSelected(tab)
+                    IntSetting.MAIN_LAST_PLATFORM_TAB.setInt(
+                        NativeConfig.LAYER_BASE,
+                        tab.position
+                    )
+                }
+            })
+
+        for (i in PlatformPagerAdapter.TAB_ICONS.indices) {
+            binding.tabsPlatforms.getTabAt(i)?.setIcon(PlatformPagerAdapter.TAB_ICONS[i])
+        }
+
+        binding.pagerPlatforms.currentItem = IntSetting.MAIN_LAST_PLATFORM_TAB.int
+
+        showGames()
+        GameFileCacheManager.startLoad()
+    }
+
+    override fun setTheme(themeId: Int) {
+        super.setTheme(themeId)
+        this.themeId = themeId
+    }
+
+    private fun setInsets() =
+        ViewCompat.setOnApplyWindowInsetsListener(binding.appbarMain) { _: View?, windowInsets: WindowInsetsCompat ->
+            val insets = windowInsets.getInsets(WindowInsetsCompat.Type.systemBars())
+
+            InsetsHelper.insetAppBar(insets, binding.appbarMain)
+
+            val mlpFab = binding.buttonAddDirectory.layoutParams as MarginLayoutParams
+            val fabPadding = resources.getDimensionPixelSize(R.dimen.spacing_large)
+            mlpFab.leftMargin = insets.left + fabPadding
+            mlpFab.bottomMargin = insets.bottom + fabPadding
+            mlpFab.rightMargin = insets.right + fabPadding
+            binding.buttonAddDirectory.layoutParams = mlpFab
+
+            binding.pagerPlatforms.setPadding(insets.left, 0, insets.right, 0)
+
+            InsetsHelper.applyNavbarWorkaround(insets.bottom, binding.workaroundView)
+            ThemeHelper.setNavigationBarColor(
+                this,
+                MaterialColors.getColor(binding.appbarMain, R.attr.colorSurface)
+            )
+
+            windowInsets
+        }
+}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainPresenter.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainPresenter.java
deleted file mode 100644
index e136864faa..0000000000
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainPresenter.java
+++ /dev/null
@@ -1,349 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-package org.dolphinemu.dolphinemu.ui.main;
-
-import android.content.ContentResolver;
-import android.content.Intent;
-import android.net.Uri;
-
-import androidx.activity.ComponentActivity;
-import androidx.fragment.app.FragmentActivity;
-import androidx.lifecycle.Observer;
-import androidx.lifecycle.ViewModelProvider;
-
-import com.google.android.material.dialog.MaterialAlertDialogBuilder;
-
-import org.dolphinemu.dolphinemu.BuildConfig;
-import org.dolphinemu.dolphinemu.R;
-import org.dolphinemu.dolphinemu.activities.EmulationActivity;
-import org.dolphinemu.dolphinemu.features.settings.model.BooleanSetting;
-import org.dolphinemu.dolphinemu.features.settings.ui.MenuTag;
-import org.dolphinemu.dolphinemu.features.sysupdate.ui.SystemUpdateProgressBarDialogFragment;
-import org.dolphinemu.dolphinemu.features.sysupdate.ui.SystemMenuNotInstalledDialogFragment;
-import org.dolphinemu.dolphinemu.features.sysupdate.ui.SystemUpdateViewModel;
-import org.dolphinemu.dolphinemu.fragments.AboutDialogFragment;
-import org.dolphinemu.dolphinemu.model.GameFileCache;
-import org.dolphinemu.dolphinemu.services.GameFileCacheManager;
-import org.dolphinemu.dolphinemu.utils.AfterDirectoryInitializationRunner;
-import org.dolphinemu.dolphinemu.utils.BooleanSupplier;
-import org.dolphinemu.dolphinemu.utils.CompletableFuture;
-import org.dolphinemu.dolphinemu.utils.ContentHandler;
-import org.dolphinemu.dolphinemu.utils.DirectoryInitialization;
-import org.dolphinemu.dolphinemu.utils.FileBrowserHelper;
-import org.dolphinemu.dolphinemu.utils.PermissionsHandler;
-import org.dolphinemu.dolphinemu.utils.ThreadUtil;
-import org.dolphinemu.dolphinemu.utils.WiiUtils;
-
-import java.util.Arrays;
-import java.util.concurrent.ExecutionException;
-
-public final class MainPresenter
-{
-  public static final int REQUEST_DIRECTORY = 1;
-  public static final int REQUEST_GAME_FILE = 2;
-  public static final int REQUEST_SD_FILE = 3;
-  public static final int REQUEST_WAD_FILE = 4;
-  public static final int REQUEST_WII_SAVE_FILE = 5;
-  public static final int REQUEST_NAND_BIN_FILE = 6;
-
-  private static boolean sShouldRescanLibrary = true;
-
-  private final MainView mView;
-  private final FragmentActivity mActivity;
-  private String mDirToAdd;
-
-  public MainPresenter(MainView view, FragmentActivity activity)
-  {
-    mView = view;
-    mActivity = activity;
-  }
-
-  public void onCreate()
-  {
-    // Ask the user to grant write permission if relevant and not already granted
-    if (DirectoryInitialization.isWaitingForWriteAccess(mActivity))
-      PermissionsHandler.requestWritePermission(mActivity);
-
-    String versionName = BuildConfig.VERSION_NAME;
-    mView.setVersionString(versionName);
-
-    GameFileCacheManager.getGameFiles().observe(mActivity, (gameFiles) -> mView.showGames());
-
-    Observer<Boolean> refreshObserver = (isLoading) ->
-    {
-      mView.setRefreshing(GameFileCacheManager.isLoadingOrRescanning());
-    };
-    GameFileCacheManager.isLoading().observe(mActivity, refreshObserver);
-    GameFileCacheManager.isRescanning().observe(mActivity, refreshObserver);
-  }
-
-  public void onDestroy()
-  {
-  }
-
-  public void onFabClick()
-  {
-    new AfterDirectoryInitializationRunner().runWithLifecycle(mActivity,
-            mView::launchFileListActivity);
-  }
-
-  public boolean handleOptionSelection(int itemId, ComponentActivity activity)
-  {
-    switch (itemId)
-    {
-      case R.id.menu_settings:
-        mView.launchSettingsActivity(MenuTag.SETTINGS);
-        return true;
-
-      case R.id.menu_grid_options:
-        mView.showGridOptions();
-        return true;
-
-      case R.id.menu_refresh:
-        mView.setRefreshing(true);
-        GameFileCacheManager.startRescan();
-        return true;
-
-      case R.id.button_add_directory:
-        new AfterDirectoryInitializationRunner().runWithLifecycle(activity,
-                mView::launchFileListActivity);
-        return true;
-
-      case R.id.menu_open_file:
-        mView.launchOpenFileActivity(REQUEST_GAME_FILE);
-        return true;
-
-      case R.id.menu_load_wii_system_menu:
-        launchWiiSystemMenu();
-        return true;
-
-      case R.id.menu_online_system_update:
-        new AfterDirectoryInitializationRunner().runWithLifecycle(activity,
-                this::launchOnlineUpdate);
-        return true;
-
-      case R.id.menu_install_wad:
-        new AfterDirectoryInitializationRunner().runWithLifecycle(activity,
-                () -> mView.launchOpenFileActivity(REQUEST_WAD_FILE));
-        return true;
-
-      case R.id.menu_import_wii_save:
-        new AfterDirectoryInitializationRunner().runWithLifecycle(activity,
-                () -> mView.launchOpenFileActivity(REQUEST_WII_SAVE_FILE));
-        return true;
-
-      case R.id.menu_import_nand_backup:
-        new AfterDirectoryInitializationRunner().runWithLifecycle(activity,
-                () -> mView.launchOpenFileActivity(REQUEST_NAND_BIN_FILE));
-        return true;
-
-      case R.id.menu_about:
-        showAboutDialog();
-    }
-
-    return false;
-  }
-
-  public void onResume()
-  {
-    if (mDirToAdd != null)
-    {
-      GameFileCache.addGameFolder(mDirToAdd);
-      mDirToAdd = null;
-    }
-
-    if (sShouldRescanLibrary)
-    {
-      GameFileCacheManager.startRescan();
-    }
-
-    sShouldRescanLibrary = true;
-  }
-
-  /**
-   * Called when a selection is made using the legacy folder picker.
-   */
-  public void onDirectorySelected(String dir)
-  {
-    mDirToAdd = dir;
-  }
-
-  /**
-   * Called when a selection is made using the Storage Access Framework folder picker.
-   */
-  public void onDirectorySelected(Intent result)
-  {
-    Uri uri = result.getData();
-
-    boolean recursive = BooleanSetting.MAIN_RECURSIVE_ISO_PATHS.getBoolean();
-    String[] childNames = ContentHandler.getChildNames(uri, recursive);
-    if (Arrays.stream(childNames).noneMatch((name) -> FileBrowserHelper.GAME_EXTENSIONS.contains(
-            FileBrowserHelper.getExtension(name, false))))
-    {
-      new MaterialAlertDialogBuilder(mActivity)
-              .setMessage(mActivity.getString(R.string.wrong_file_extension_in_directory,
-                      FileBrowserHelper.setToSortedDelimitedString(
-                              FileBrowserHelper.GAME_EXTENSIONS)))
-              .setPositiveButton(R.string.ok, null)
-              .show();
-    }
-
-    ContentResolver contentResolver = mActivity.getContentResolver();
-    Uri canonicalizedUri = contentResolver.canonicalize(uri);
-    if (canonicalizedUri != null)
-      uri = canonicalizedUri;
-
-    int takeFlags = result.getFlags() & Intent.FLAG_GRANT_READ_URI_PERMISSION;
-    mActivity.getContentResolver().takePersistableUriPermission(uri, takeFlags);
-
-    mDirToAdd = uri.toString();
-  }
-
-  public void installWAD(String path)
-  {
-    ThreadUtil.runOnThreadAndShowResult(mActivity, R.string.import_in_progress, 0, () ->
-    {
-      boolean success = WiiUtils.installWAD(path);
-      int message = success ? R.string.wad_install_success : R.string.wad_install_failure;
-      return mActivity.getResources().getString(message);
-    });
-  }
-
-  public void importWiiSave(String path)
-  {
-    CompletableFuture<Boolean> canOverwriteFuture = new CompletableFuture<>();
-
-    ThreadUtil.runOnThreadAndShowResult(mActivity, R.string.import_in_progress, 0, () ->
-    {
-      BooleanSupplier canOverwrite = () ->
-      {
-        mActivity.runOnUiThread(() ->
-        {
-          new MaterialAlertDialogBuilder(mActivity)
-                  .setMessage(R.string.wii_save_exists)
-                  .setCancelable(false)
-                  .setPositiveButton(R.string.yes, (dialog, i) -> canOverwriteFuture.complete(true))
-                  .setNegativeButton(R.string.no, (dialog, i) -> canOverwriteFuture.complete(false))
-                  .show();
-        });
-
-        try
-        {
-          return canOverwriteFuture.get();
-        }
-        catch (ExecutionException | InterruptedException e)
-        {
-          // Shouldn't happen
-          throw new RuntimeException(e);
-        }
-      };
-
-      int result = WiiUtils.importWiiSave(path, canOverwrite);
-
-      int message;
-      switch (result)
-      {
-        case WiiUtils.RESULT_SUCCESS:
-          message = R.string.wii_save_import_success;
-          break;
-        case WiiUtils.RESULT_CORRUPTED_SOURCE:
-          message = R.string.wii_save_import_corruped_source;
-          break;
-        case WiiUtils.RESULT_TITLE_MISSING:
-          message = R.string.wii_save_import_title_missing;
-          break;
-        case WiiUtils.RESULT_CANCELLED:
-          return null;
-        default:
-          message = R.string.wii_save_import_error;
-          break;
-      }
-      return mActivity.getResources().getString(message);
-    });
-  }
-
-  public void importNANDBin(String path)
-  {
-    new MaterialAlertDialogBuilder(mActivity)
-            .setMessage(R.string.nand_import_warning)
-            .setNegativeButton(R.string.no, (dialog, i) -> dialog.dismiss())
-            .setPositiveButton(R.string.yes, (dialog, i) ->
-            {
-              dialog.dismiss();
-
-              ThreadUtil.runOnThreadAndShowResult(mActivity, R.string.import_in_progress,
-                      R.string.do_not_close_app, () ->
-                      {
-                        // ImportNANDBin unfortunately doesn't provide any result value...
-                        // It does however show a panic alert if something goes wrong.
-                        WiiUtils.importNANDBin(path);
-                        return null;
-                      });
-            })
-            .show();
-  }
-
-  public static void skipRescanningLibrary()
-  {
-    sShouldRescanLibrary = false;
-  }
-
-  private void launchOnlineUpdate()
-  {
-    if (WiiUtils.isSystemMenuInstalled())
-    {
-      SystemUpdateViewModel viewModel =
-              new ViewModelProvider(mActivity).get(SystemUpdateViewModel.class);
-      viewModel.setRegion(-1);
-      launchUpdateProgressBarFragment(mActivity);
-    }
-    else
-    {
-      SystemMenuNotInstalledDialogFragment dialogFragment =
-              new SystemMenuNotInstalledDialogFragment();
-      dialogFragment
-              .show(mActivity.getSupportFragmentManager(), "SystemMenuNotInstalledDialogFragment");
-    }
-  }
-
-  public static void launchDiscUpdate(String path, FragmentActivity activity)
-  {
-    SystemUpdateViewModel viewModel =
-            new ViewModelProvider(activity).get(SystemUpdateViewModel.class);
-    viewModel.setDiscPath(path);
-    launchUpdateProgressBarFragment(activity);
-  }
-
-  private static void launchUpdateProgressBarFragment(FragmentActivity activity)
-  {
-    SystemUpdateProgressBarDialogFragment progressBarFragment =
-            new SystemUpdateProgressBarDialogFragment();
-    progressBarFragment
-            .show(activity.getSupportFragmentManager(), SystemUpdateProgressBarDialogFragment.TAG);
-    progressBarFragment.setCancelable(false);
-  }
-
-  private void launchWiiSystemMenu()
-  {
-    new AfterDirectoryInitializationRunner().runWithLifecycle(mActivity, () ->
-    {
-      if (WiiUtils.isSystemMenuInstalled())
-      {
-        EmulationActivity.launchSystemMenu(mActivity);
-      }
-      else
-      {
-        SystemMenuNotInstalledDialogFragment dialogFragment =
-                new SystemMenuNotInstalledDialogFragment();
-        dialogFragment
-                .show(mActivity.getSupportFragmentManager(),
-                        "SystemMenuNotInstalledDialogFragment");
-      }
-    });
-  }
-
-  private void showAboutDialog()
-  {
-    new AboutDialogFragment().show(mActivity.getSupportFragmentManager(), AboutDialogFragment.TAG);
-  }
-}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainPresenter.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainPresenter.kt
new file mode 100644
index 0000000000..ddd2bcd2d0
--- /dev/null
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainPresenter.kt
@@ -0,0 +1,311 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.dolphinemu.dolphinemu.ui.main
+
+import android.content.DialogInterface
+import android.content.Intent
+import androidx.activity.ComponentActivity
+import androidx.fragment.app.FragmentActivity
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProvider
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import org.dolphinemu.dolphinemu.BuildConfig
+import org.dolphinemu.dolphinemu.R
+import org.dolphinemu.dolphinemu.activities.EmulationActivity
+import org.dolphinemu.dolphinemu.features.settings.model.BooleanSetting
+import org.dolphinemu.dolphinemu.features.settings.ui.MenuTag
+import org.dolphinemu.dolphinemu.features.sysupdate.ui.SystemMenuNotInstalledDialogFragment
+import org.dolphinemu.dolphinemu.features.sysupdate.ui.SystemUpdateProgressBarDialogFragment
+import org.dolphinemu.dolphinemu.features.sysupdate.ui.SystemUpdateViewModel
+import org.dolphinemu.dolphinemu.fragments.AboutDialogFragment
+import org.dolphinemu.dolphinemu.model.GameFileCache
+import org.dolphinemu.dolphinemu.services.GameFileCacheManager
+import org.dolphinemu.dolphinemu.utils.AfterDirectoryInitializationRunner
+import org.dolphinemu.dolphinemu.utils.BooleanSupplier
+import org.dolphinemu.dolphinemu.utils.CompletableFuture
+import org.dolphinemu.dolphinemu.utils.ContentHandler
+import org.dolphinemu.dolphinemu.utils.DirectoryInitialization
+import org.dolphinemu.dolphinemu.utils.FileBrowserHelper
+import org.dolphinemu.dolphinemu.utils.PermissionsHandler
+import org.dolphinemu.dolphinemu.utils.ThreadUtil
+import org.dolphinemu.dolphinemu.utils.WiiUtils
+import java.util.Arrays
+import java.util.concurrent.ExecutionException
+
+class MainPresenter(private val mainView: MainView, private val activity: FragmentActivity) {
+    private var dirToAdd: String? = null
+
+    fun onCreate() {
+        // Ask the user to grant write permission if relevant and not already granted
+        if (DirectoryInitialization.isWaitingForWriteAccess(activity))
+            PermissionsHandler.requestWritePermission(activity)
+
+        val versionName = BuildConfig.VERSION_NAME
+        mainView.setVersionString(versionName)
+
+        GameFileCacheManager.getGameFiles().observe(activity) { mainView.showGames() }
+        val refreshObserver =
+            Observer<Boolean> { _: Boolean? -> mainView.setRefreshing(GameFileCacheManager.isLoadingOrRescanning()) }
+        GameFileCacheManager.isLoading().observe(activity, refreshObserver)
+        GameFileCacheManager.isRescanning().observe(activity, refreshObserver)
+    }
+
+    fun onFabClick() {
+        AfterDirectoryInitializationRunner().runWithLifecycle(activity) { mainView.launchFileListActivity() }
+    }
+
+    fun handleOptionSelection(itemId: Int, activity: ComponentActivity): Boolean =
+        when (itemId) {
+            R.id.menu_settings -> {
+                mainView.launchSettingsActivity(MenuTag.SETTINGS)
+                true
+            }
+
+            R.id.menu_grid_options -> {
+                mainView.showGridOptions()
+                true
+            }
+
+            R.id.menu_refresh -> {
+                mainView.setRefreshing(true)
+                GameFileCacheManager.startRescan()
+                true
+            }
+
+            R.id.button_add_directory -> {
+                AfterDirectoryInitializationRunner().runWithLifecycle(activity) { mainView.launchFileListActivity() }
+                true
+            }
+
+            R.id.menu_open_file -> {
+                mainView.launchOpenFileActivity(REQUEST_GAME_FILE)
+                true
+            }
+
+            R.id.menu_load_wii_system_menu -> {
+                launchWiiSystemMenu()
+                true
+            }
+
+            R.id.menu_online_system_update -> {
+                AfterDirectoryInitializationRunner().runWithLifecycle(activity) { launchOnlineUpdate() }
+                true
+            }
+
+            R.id.menu_install_wad -> {
+                AfterDirectoryInitializationRunner().runWithLifecycle(
+                    activity
+                ) { mainView.launchOpenFileActivity(REQUEST_WAD_FILE) }
+                true
+            }
+
+            R.id.menu_import_wii_save -> {
+                AfterDirectoryInitializationRunner().runWithLifecycle(
+                    activity
+                ) { mainView.launchOpenFileActivity(REQUEST_WII_SAVE_FILE) }
+                true
+            }
+
+            R.id.menu_import_nand_backup -> {
+                AfterDirectoryInitializationRunner().runWithLifecycle(
+                    activity
+                ) { mainView.launchOpenFileActivity(REQUEST_NAND_BIN_FILE) }
+                true
+            }
+
+            R.id.menu_about -> {
+                showAboutDialog()
+                false
+            }
+
+            else -> false
+        }
+
+    fun onResume() {
+        if (dirToAdd != null) {
+            GameFileCache.addGameFolder(dirToAdd)
+            dirToAdd = null
+        }
+
+        if (shouldRescanLibrary) {
+            GameFileCacheManager.startRescan()
+        }
+
+        shouldRescanLibrary = true
+    }
+
+    /**
+     * Called when a selection is made using the legacy folder picker.
+     */
+    fun onDirectorySelected(dir: String?) {
+        dirToAdd = dir
+    }
+
+    /**
+     * Called when a selection is made using the Storage Access Framework folder picker.
+     */
+    fun onDirectorySelected(result: Intent) {
+        var uri = result.data!!
+
+        val recursive = BooleanSetting.MAIN_RECURSIVE_ISO_PATHS.boolean
+        val childNames = ContentHandler.getChildNames(uri, recursive)
+        if (Arrays.stream(childNames).noneMatch {
+                FileBrowserHelper.GAME_EXTENSIONS
+                    .contains(FileBrowserHelper.getExtension(it, false))
+            }) {
+            MaterialAlertDialogBuilder(activity)
+                .setMessage(
+                    activity.getString(
+                        R.string.wrong_file_extension_in_directory,
+                        FileBrowserHelper.setToSortedDelimitedString(FileBrowserHelper.GAME_EXTENSIONS)
+                    )
+                )
+                .setPositiveButton(android.R.string.ok, null)
+                .show()
+        }
+
+        val contentResolver = activity.contentResolver
+        val canonicalizedUri = contentResolver.canonicalize(uri)
+        if (canonicalizedUri != null)
+            uri = canonicalizedUri
+
+        val takeFlags = result.flags and Intent.FLAG_GRANT_READ_URI_PERMISSION
+        activity.contentResolver.takePersistableUriPermission(uri, takeFlags)
+
+        dirToAdd = uri.toString()
+    }
+
+    fun installWAD(path: String?) {
+        ThreadUtil.runOnThreadAndShowResult(
+            activity,
+            R.string.import_in_progress,
+            0,
+            {
+                val success = WiiUtils.installWAD(path!!)
+                val message =
+                    if (success) R.string.wad_install_success else R.string.wad_install_failure
+                activity.getString(message)
+            })
+    }
+
+    fun importWiiSave(path: String?) {
+        val canOverwriteFuture = CompletableFuture<Boolean>()
+        ThreadUtil.runOnThreadAndShowResult(
+            activity,
+            R.string.import_in_progress,
+            0,
+            {
+                val canOverwrite = BooleanSupplier {
+                    activity.runOnUiThread {
+                        MaterialAlertDialogBuilder(activity)
+                            .setMessage(R.string.wii_save_exists)
+                            .setCancelable(false)
+                            .setPositiveButton(R.string.yes) { _: DialogInterface?, _: Int ->
+                                canOverwriteFuture.complete(true)
+                            }
+                            .setNegativeButton(R.string.no) { _: DialogInterface?, _: Int ->
+                                canOverwriteFuture.complete(false)
+                            }
+                            .show()
+                    }
+                    try {
+                        return@BooleanSupplier canOverwriteFuture.get()
+                    } catch (e: ExecutionException) {
+                        // Shouldn't happen
+                        throw RuntimeException(e)
+                    } catch (e: InterruptedException) {
+                        throw RuntimeException(e)
+                    }
+                }
+
+                val message: Int = when (WiiUtils.importWiiSave(path!!, canOverwrite)) {
+                    WiiUtils.RESULT_SUCCESS -> R.string.wii_save_import_success
+                    WiiUtils.RESULT_CORRUPTED_SOURCE -> R.string.wii_save_import_corruped_source
+                    WiiUtils.RESULT_TITLE_MISSING -> R.string.wii_save_import_title_missing
+                    WiiUtils.RESULT_CANCELLED -> return@runOnThreadAndShowResult null
+                    else -> R.string.wii_save_import_error
+                }
+                activity.resources.getString(message)
+            })
+    }
+
+    fun importNANDBin(path: String?) {
+        MaterialAlertDialogBuilder(activity)
+            .setMessage(R.string.nand_import_warning)
+            .setNegativeButton(R.string.no) { dialog: DialogInterface, _: Int -> dialog.dismiss() }
+            .setPositiveButton(R.string.yes) { dialog: DialogInterface, _: Int ->
+                dialog.dismiss()
+                ThreadUtil.runOnThreadAndShowResult(
+                    activity,
+                    R.string.import_in_progress,
+                    R.string.do_not_close_app,
+                    {
+                        // ImportNANDBin unfortunately doesn't provide any result value...
+                        // It does however show a panic alert if something goes wrong.
+                        WiiUtils.importNANDBin(path!!)
+                        null
+                    })
+            }
+            .show()
+    }
+
+    private fun launchOnlineUpdate() {
+        if (WiiUtils.isSystemMenuInstalled()) {
+            val viewModel = ViewModelProvider(activity)[SystemUpdateViewModel::class.java]
+            viewModel.region = -1
+            launchUpdateProgressBarFragment(activity)
+        } else {
+            SystemMenuNotInstalledDialogFragment().show(
+                activity.supportFragmentManager,
+                SystemMenuNotInstalledDialogFragment.TAG
+            )
+        }
+    }
+
+    private fun launchWiiSystemMenu() {
+        AfterDirectoryInitializationRunner().runWithLifecycle(activity) {
+            if (WiiUtils.isSystemMenuInstalled()) {
+                EmulationActivity.launchSystemMenu(activity)
+            } else {
+                SystemMenuNotInstalledDialogFragment().show(
+                    activity.supportFragmentManager,
+                    SystemMenuNotInstalledDialogFragment.TAG
+                )
+            }
+        }
+    }
+
+    private fun showAboutDialog() {
+        AboutDialogFragment().show(activity.supportFragmentManager, AboutDialogFragment.TAG)
+    }
+
+    companion object {
+        const val REQUEST_DIRECTORY = 1
+        const val REQUEST_GAME_FILE = 2
+        const val REQUEST_SD_FILE = 3
+        const val REQUEST_WAD_FILE = 4
+        const val REQUEST_WII_SAVE_FILE = 5
+        const val REQUEST_NAND_BIN_FILE = 6
+
+        private var shouldRescanLibrary = true
+
+        @JvmStatic
+        fun skipRescanningLibrary() {
+            shouldRescanLibrary = false
+        }
+
+        @JvmStatic
+        fun launchDiscUpdate(path: String, activity: FragmentActivity) {
+            val viewModel = ViewModelProvider(activity)[SystemUpdateViewModel::class.java]
+            viewModel.discPath = path
+            launchUpdateProgressBarFragment(activity)
+        }
+
+        private fun launchUpdateProgressBarFragment(activity: FragmentActivity) {
+            val progressBarFragment = SystemUpdateProgressBarDialogFragment()
+            progressBarFragment
+                .show(activity.supportFragmentManager, SystemUpdateProgressBarDialogFragment.TAG)
+            progressBarFragment.isCancelable = false
+        }
+    }
+}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainView.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainView.java
deleted file mode 100644
index 604cb5d1a8..0000000000
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainView.java
+++ /dev/null
@@ -1,41 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-package org.dolphinemu.dolphinemu.ui.main;
-
-import org.dolphinemu.dolphinemu.features.settings.ui.MenuTag;
-
-/**
- * Abstraction for the screen that shows on application launch.
- * Implementations will differ primarily to target touch-screen
- * or non-touch screen devices.
- */
-public interface MainView
-{
-  /**
-   * Pass the view the native library's version string. Displaying
-   * it is optional.
-   *
-   * @param version A string pulled from native code.
-   */
-  void setVersionString(String version);
-
-  void launchSettingsActivity(MenuTag menuTag);
-
-  void launchFileListActivity();
-
-  void launchOpenFileActivity(int requestCode);
-
-  /**
-   * Shows or hides the loading indicator.
-   */
-  void setRefreshing(boolean refreshing);
-
-  /**
-   * To be called when the game file cache is updated.
-   */
-  void showGames();
-
-  void reloadGrid();
-
-  void showGridOptions();
-}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainView.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainView.kt
new file mode 100644
index 0000000000..3892ee7599
--- /dev/null
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainView.kt
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.dolphinemu.dolphinemu.ui.main
+
+import org.dolphinemu.dolphinemu.features.settings.ui.MenuTag
+
+/**
+ * Abstraction for the screen that shows on application launch.
+ * Implementations will differ primarily to target touch-screen
+ * or non-touch screen devices.
+ */
+interface MainView {
+    /**
+     * Pass the view the native library's version string. Displaying
+     * it is optional.
+     *
+     * @param version A string pulled from native code.
+     */
+    fun setVersionString(version: String)
+
+    fun launchSettingsActivity(menuTag: MenuTag?)
+
+    fun launchFileListActivity()
+
+    fun launchOpenFileActivity(requestCode: Int)
+
+    /**
+     * Shows or hides the loading indicator.
+     */
+    fun setRefreshing(refreshing: Boolean)
+
+    /**
+     * To be called when the game file cache is updated.
+     */
+    fun showGames()
+
+    fun reloadGrid()
+
+    fun showGridOptions()
+}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/ThemeProvider.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/ThemeProvider.java
deleted file mode 100644
index 1be137f33e..0000000000
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/ThemeProvider.java
+++ /dev/null
@@ -1,9 +0,0 @@
-package org.dolphinemu.dolphinemu.ui.main;
-
-public interface ThemeProvider
-{
-  /**
-   * Provides theme ID by overriding an activity's 'setTheme' method and returning that result
-   */
-  int getThemeId();
-}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/ThemeProvider.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/ThemeProvider.kt
new file mode 100644
index 0000000000..b49011a987
--- /dev/null
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/ThemeProvider.kt
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.dolphinemu.dolphinemu.ui.main
+
+interface ThemeProvider {
+    /**
+     * Provides theme ID by overriding an activity's 'setTheme' method and returning that result
+     */
+    val themeId: Int
+}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/TvMainActivity.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/TvMainActivity.java
deleted file mode 100644
index 2da1b8591d..0000000000
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/TvMainActivity.java
+++ /dev/null
@@ -1,418 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-package org.dolphinemu.dolphinemu.ui.main;
-
-import android.content.Intent;
-import android.content.pm.PackageManager;
-import android.net.Uri;
-import android.os.Bundle;
-
-import androidx.annotation.NonNull;
-import androidx.core.content.ContextCompat;
-import androidx.core.splashscreen.SplashScreen;
-import androidx.fragment.app.FragmentActivity;
-import androidx.fragment.app.FragmentManager;
-import androidx.leanback.app.BrowseSupportFragment;
-import androidx.leanback.widget.ArrayObjectAdapter;
-import androidx.leanback.widget.HeaderItem;
-import androidx.leanback.widget.ListRow;
-import androidx.leanback.widget.ListRowPresenter;
-import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
-
-import org.dolphinemu.dolphinemu.fragments.GridOptionDialogFragment;
-import org.dolphinemu.dolphinemu.R;
-import org.dolphinemu.dolphinemu.activities.EmulationActivity;
-import org.dolphinemu.dolphinemu.adapters.GameRowPresenter;
-import org.dolphinemu.dolphinemu.adapters.SettingsRowPresenter;
-import org.dolphinemu.dolphinemu.databinding.ActivityTvMainBinding;
-import org.dolphinemu.dolphinemu.features.settings.ui.MenuTag;
-import org.dolphinemu.dolphinemu.features.settings.ui.SettingsActivity;
-import org.dolphinemu.dolphinemu.model.GameFile;
-import org.dolphinemu.dolphinemu.model.TvSettingsItem;
-import org.dolphinemu.dolphinemu.services.GameFileCacheManager;
-import org.dolphinemu.dolphinemu.ui.platform.Platform;
-import org.dolphinemu.dolphinemu.utils.DirectoryInitialization;
-import org.dolphinemu.dolphinemu.utils.FileBrowserHelper;
-import org.dolphinemu.dolphinemu.utils.PermissionsHandler;
-import org.dolphinemu.dolphinemu.utils.StartupHandler;
-import org.dolphinemu.dolphinemu.utils.TvUtil;
-import org.dolphinemu.dolphinemu.viewholders.TvGameViewHolder;
-
-import java.util.ArrayList;
-import java.util.Collection;
-
-public final class TvMainActivity extends FragmentActivity
-        implements MainView, SwipeRefreshLayout.OnRefreshListener
-{
-  private final MainPresenter mPresenter = new MainPresenter(this, this);
-
-  private SwipeRefreshLayout mSwipeRefresh;
-
-  private BrowseSupportFragment mBrowseFragment;
-
-  private final ArrayList<ArrayObjectAdapter> mGameRows = new ArrayList<>();
-
-  private ActivityTvMainBinding mBinding;
-
-  @Override
-  protected void onCreate(Bundle savedInstanceState)
-  {
-    SplashScreen splashScreen = SplashScreen.installSplashScreen(this);
-    splashScreen.setKeepOnScreenCondition(
-            () -> !DirectoryInitialization.areDolphinDirectoriesReady());
-
-    super.onCreate(savedInstanceState);
-    mBinding = ActivityTvMainBinding.inflate(getLayoutInflater());
-    setContentView(mBinding.getRoot());
-
-    setupUI();
-
-    mPresenter.onCreate();
-
-    // Stuff in this block only happens when this activity is newly created (i.e. not a rotation)
-    if (savedInstanceState == null)
-    {
-      StartupHandler.HandleInit(this);
-    }
-  }
-
-  @Override
-  protected void onResume()
-  {
-    super.onResume();
-
-    if (DirectoryInitialization.shouldStart(this))
-    {
-      DirectoryInitialization.start(this);
-      GameFileCacheManager.startLoad();
-    }
-
-    mPresenter.onResume();
-  }
-
-  @Override
-  protected void onDestroy()
-  {
-    super.onDestroy();
-    mPresenter.onDestroy();
-  }
-
-  @Override
-  protected void onStart()
-  {
-    super.onStart();
-    StartupHandler.checkSessionReset(this);
-  }
-
-  @Override
-  protected void onStop()
-  {
-    super.onStop();
-
-    if (isChangingConfigurations())
-    {
-      MainPresenter.skipRescanningLibrary();
-    }
-
-    StartupHandler.setSessionTime(this);
-  }
-
-  void setupUI()
-  {
-    mSwipeRefresh = mBinding.swipeRefresh;
-
-    mSwipeRefresh.setOnRefreshListener(this);
-
-    setRefreshing(GameFileCacheManager.isLoadingOrRescanning());
-
-    final FragmentManager fragmentManager = getSupportFragmentManager();
-    mBrowseFragment = new BrowseSupportFragment();
-    fragmentManager
-            .beginTransaction()
-            .add(R.id.content, mBrowseFragment, "BrowseFragment")
-            .commit();
-
-    // Set display parameters for the BrowseFragment
-    mBrowseFragment.setHeadersState(BrowseSupportFragment.HEADERS_ENABLED);
-    mBrowseFragment.setBrandColor(ContextCompat.getColor(this, R.color.dolphin_blue));
-    buildRowsAdapter();
-
-    mBrowseFragment.setOnItemViewClickedListener(
-            (itemViewHolder, item, rowViewHolder, row) ->
-            {
-              // Special case: user clicked on a settings row item.
-              if (item instanceof TvSettingsItem)
-              {
-                TvSettingsItem settingsItem = (TvSettingsItem) item;
-                mPresenter.handleOptionSelection(settingsItem.getItemId(), this);
-              }
-              else
-              {
-                TvGameViewHolder holder = (TvGameViewHolder) itemViewHolder;
-
-                // Start the emulation activity and send the path of the clicked ISO to it.
-                String[] paths = GameFileCacheManager.findSecondDiscAndGetPaths(holder.gameFile);
-                EmulationActivity.launch(TvMainActivity.this, paths, false);
-              }
-            });
-  }
-
-  /**
-   * MainView
-   */
-
-  @Override
-  public void setVersionString(String version)
-  {
-    mBrowseFragment.setTitle(version);
-  }
-
-  @Override
-  public void launchSettingsActivity(MenuTag menuTag)
-  {
-    SettingsActivity.launch(this, menuTag);
-  }
-
-  @Override
-  public void launchFileListActivity()
-  {
-    if (DirectoryInitialization.preferOldFolderPicker(this))
-    {
-      FileBrowserHelper.openDirectoryPicker(this, FileBrowserHelper.GAME_EXTENSIONS);
-    }
-    else
-    {
-      Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
-      startActivityForResult(intent, MainPresenter.REQUEST_DIRECTORY);
-    }
-  }
-
-  @Override
-  public void launchOpenFileActivity(int requestCode)
-  {
-    Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
-    intent.addCategory(Intent.CATEGORY_OPENABLE);
-    intent.setType("*/*");
-    startActivityForResult(intent, requestCode);
-  }
-
-  /**
-   * Shows or hides the loading indicator.
-   */
-  @Override
-  public void setRefreshing(boolean refreshing)
-  {
-    mSwipeRefresh.setRefreshing(refreshing);
-  }
-
-  @Override
-  public void showGames()
-  {
-    // Kicks off the program services to update all channels
-    TvUtil.updateAllChannels(getApplicationContext());
-
-    buildRowsAdapter();
-  }
-
-  @Override
-  public void reloadGrid()
-  {
-    for (ArrayObjectAdapter row : mGameRows)
-    {
-      row.notifyArrayItemRangeChanged(0, row.size());
-    }
-  }
-
-  @Override
-  public void showGridOptions()
-  {
-    new GridOptionDialogFragment().show(getSupportFragmentManager(), "gridOptions");
-  }
-
-  /**
-   * Callback from AddDirectoryActivity. Applies any changes necessary to the GameGridActivity.
-   *
-   * @param requestCode An int describing whether the Activity that is returning did so successfully.
-   * @param resultCode  An int describing what Activity is giving us this callback.
-   * @param result      The information the returning Activity is providing us.
-   */
-  @Override
-  protected void onActivityResult(int requestCode, int resultCode, Intent result)
-  {
-    super.onActivityResult(requestCode, resultCode, result);
-
-    // If the user picked a file, as opposed to just backing out.
-    if (resultCode == RESULT_OK)
-    {
-      Uri uri = result.getData();
-      switch (requestCode)
-      {
-        case MainPresenter.REQUEST_DIRECTORY:
-          if (DirectoryInitialization.preferOldFolderPicker(this))
-          {
-            mPresenter.onDirectorySelected(FileBrowserHelper.getSelectedPath(result));
-          }
-          else
-          {
-            mPresenter.onDirectorySelected(result);
-          }
-          break;
-
-        case MainPresenter.REQUEST_GAME_FILE:
-          FileBrowserHelper.runAfterExtensionCheck(this, uri,
-                  FileBrowserHelper.GAME_LIKE_EXTENSIONS,
-                  () -> EmulationActivity.launch(this, result.getData().toString(), false));
-          break;
-
-        case MainPresenter.REQUEST_WAD_FILE:
-          FileBrowserHelper.runAfterExtensionCheck(this, uri, FileBrowserHelper.WAD_EXTENSION,
-                  () -> mPresenter.installWAD(result.getData().toString()));
-          break;
-
-        case MainPresenter.REQUEST_WII_SAVE_FILE:
-          FileBrowserHelper.runAfterExtensionCheck(this, uri, FileBrowserHelper.BIN_EXTENSION,
-                  () -> mPresenter.importWiiSave(result.getData().toString()));
-          break;
-
-        case MainPresenter.REQUEST_NAND_BIN_FILE:
-          FileBrowserHelper.runAfterExtensionCheck(this, uri, FileBrowserHelper.BIN_EXTENSION,
-                  () -> mPresenter.importNANDBin(result.getData().toString()));
-          break;
-      }
-    }
-    else
-    {
-      MainPresenter.skipRescanningLibrary();
-    }
-  }
-
-  @Override
-  public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
-          @NonNull int[] grantResults)
-  {
-    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
-
-    if (requestCode == PermissionsHandler.REQUEST_CODE_WRITE_PERMISSION)
-    {
-      if (grantResults[0] == PackageManager.PERMISSION_DENIED)
-      {
-        PermissionsHandler.setWritePermissionDenied();
-      }
-
-      DirectoryInitialization.start(this);
-      GameFileCacheManager.startLoad();
-    }
-  }
-
-  /**
-   * Called when the user requests a refresh by swiping down.
-   */
-  @Override
-  public void onRefresh()
-  {
-    setRefreshing(true);
-    GameFileCacheManager.startRescan();
-  }
-
-  private void buildRowsAdapter()
-  {
-    ArrayObjectAdapter rowsAdapter = new ArrayObjectAdapter(new ListRowPresenter());
-    mGameRows.clear();
-
-    if (!DirectoryInitialization.isWaitingForWriteAccess(this))
-    {
-      GameFileCacheManager.startLoad();
-    }
-
-    for (Platform platform : Platform.values())
-    {
-      ListRow row = buildGamesRow(platform, GameFileCacheManager.getGameFilesForPlatform(platform));
-
-      // Add row to the adapter only if it is not empty.
-      if (row != null)
-      {
-        rowsAdapter.add(row);
-      }
-    }
-
-    rowsAdapter.add(buildSettingsRow());
-
-    mBrowseFragment.setAdapter(rowsAdapter);
-  }
-
-  private ListRow buildGamesRow(Platform platform, Collection<GameFile> gameFiles)
-  {
-    // If there are no games, don't return a Row.
-    if (gameFiles.size() == 0)
-    {
-      return null;
-    }
-
-    // Create an adapter for this row.
-    ArrayObjectAdapter row = new ArrayObjectAdapter(new GameRowPresenter(this));
-    row.addAll(0, gameFiles);
-
-    // Keep a reference to the row in case we need to refresh it.
-    mGameRows.add(row);
-
-    // Create a header for this row.
-    HeaderItem header = new HeaderItem(platform.toInt(), getString(platform.getHeaderName()));
-
-    // Create the row, passing it the filled adapter and the header, and give it to the master adapter.
-    return new ListRow(header, row);
-  }
-
-  private ListRow buildSettingsRow()
-  {
-    ArrayObjectAdapter rowItems = new ArrayObjectAdapter(new SettingsRowPresenter());
-
-    rowItems.add(new TvSettingsItem(R.id.menu_settings,
-            R.drawable.ic_settings_tv,
-            R.string.grid_menu_settings));
-
-    rowItems.add(new TvSettingsItem(R.id.button_add_directory,
-            R.drawable.ic_add_tv,
-            R.string.add_directory_title));
-
-    rowItems.add(new TvSettingsItem(R.id.menu_grid_options,
-            R.drawable.ic_list_tv,
-            R.string.grid_menu_grid_options));
-
-    rowItems.add(new TvSettingsItem(R.id.menu_refresh,
-            R.drawable.ic_refresh_tv,
-            R.string.grid_menu_refresh));
-
-    rowItems.add(new TvSettingsItem(R.id.menu_open_file,
-            R.drawable.ic_play_tv,
-            R.string.grid_menu_open_file));
-
-    rowItems.add(new TvSettingsItem(R.id.menu_install_wad,
-            R.drawable.ic_folder_tv,
-            R.string.grid_menu_install_wad));
-
-    rowItems.add(new TvSettingsItem(R.id.menu_load_wii_system_menu,
-            R.drawable.ic_folder_tv,
-            R.string.grid_menu_load_wii_system_menu));
-
-    rowItems.add(new TvSettingsItem(R.id.menu_import_wii_save,
-            R.drawable.ic_folder_tv,
-            R.string.grid_menu_import_wii_save));
-
-    rowItems.add(new TvSettingsItem(R.id.menu_import_nand_backup,
-            R.drawable.ic_folder_tv,
-            R.string.grid_menu_import_nand_backup));
-
-    rowItems.add(new TvSettingsItem(R.id.menu_online_system_update,
-            R.drawable.ic_folder_tv,
-            R.string.grid_menu_online_system_update));
-
-    rowItems.add(new TvSettingsItem(R.id.menu_about,
-            R.drawable.ic_info_tv,
-            R.string.grid_menu_about));
-
-    // Create a header for this row.
-    HeaderItem header = new HeaderItem(R.string.settings, getString(R.string.settings));
-
-    return new ListRow(header, rowItems);
-  }
-}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/TvMainActivity.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/TvMainActivity.kt
new file mode 100644
index 0000000000..79ec2f2943
--- /dev/null
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/TvMainActivity.kt
@@ -0,0 +1,370 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.dolphinemu.dolphinemu.ui.main
+
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.os.Bundle
+import androidx.core.content.ContextCompat
+import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
+import androidx.fragment.app.FragmentActivity
+import androidx.leanback.app.BrowseSupportFragment
+import androidx.leanback.widget.ArrayObjectAdapter
+import androidx.leanback.widget.HeaderItem
+import androidx.leanback.widget.ListRow
+import androidx.leanback.widget.ListRowPresenter
+import androidx.leanback.widget.OnItemViewClickedListener
+import androidx.leanback.widget.Presenter
+import androidx.leanback.widget.Row
+import androidx.leanback.widget.RowPresenter
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout.OnRefreshListener
+import org.dolphinemu.dolphinemu.R
+import org.dolphinemu.dolphinemu.activities.EmulationActivity
+import org.dolphinemu.dolphinemu.adapters.GameRowPresenter
+import org.dolphinemu.dolphinemu.adapters.SettingsRowPresenter
+import org.dolphinemu.dolphinemu.databinding.ActivityTvMainBinding
+import org.dolphinemu.dolphinemu.features.settings.ui.MenuTag
+import org.dolphinemu.dolphinemu.features.settings.ui.SettingsActivity
+import org.dolphinemu.dolphinemu.fragments.GridOptionDialogFragment
+import org.dolphinemu.dolphinemu.model.GameFile
+import org.dolphinemu.dolphinemu.model.TvSettingsItem
+import org.dolphinemu.dolphinemu.services.GameFileCacheManager
+import org.dolphinemu.dolphinemu.ui.platform.Platform
+import org.dolphinemu.dolphinemu.utils.DirectoryInitialization
+import org.dolphinemu.dolphinemu.utils.FileBrowserHelper
+import org.dolphinemu.dolphinemu.utils.PermissionsHandler
+import org.dolphinemu.dolphinemu.utils.StartupHandler
+import org.dolphinemu.dolphinemu.utils.TvUtil
+import org.dolphinemu.dolphinemu.viewholders.TvGameViewHolder
+
+class TvMainActivity : FragmentActivity(), MainView, OnRefreshListener {
+    private val presenter = MainPresenter(this, this)
+
+    private var swipeRefresh: SwipeRefreshLayout? = null
+
+    private var browseFragment: BrowseSupportFragment? = null
+
+    private val gameRows = ArrayList<ArrayObjectAdapter>()
+
+    private lateinit var binding: ActivityTvMainBinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        installSplashScreen().setKeepOnScreenCondition { !DirectoryInitialization.areDolphinDirectoriesReady() }
+
+        super.onCreate(savedInstanceState)
+        binding = ActivityTvMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        setupUI()
+
+        presenter.onCreate()
+
+        // Stuff in this block only happens when this activity is newly created (i.e. not a rotation)
+        if (savedInstanceState == null) {
+            StartupHandler.HandleInit(this)
+        }
+    }
+
+    override fun onResume() {
+        super.onResume()
+        if (DirectoryInitialization.shouldStart(this)) {
+            DirectoryInitialization.start(this)
+            GameFileCacheManager.startLoad()
+        }
+
+        presenter.onResume()
+    }
+
+    override fun onStart() {
+        super.onStart()
+        StartupHandler.checkSessionReset(this)
+    }
+
+    override fun onStop() {
+        super.onStop()
+        if (isChangingConfigurations) {
+            MainPresenter.skipRescanningLibrary()
+        }
+        StartupHandler.setSessionTime(this)
+    }
+
+    private fun setupUI() {
+        swipeRefresh = binding.swipeRefresh
+        swipeRefresh!!.setOnRefreshListener(this)
+        setRefreshing(GameFileCacheManager.isLoadingOrRescanning())
+
+        browseFragment = BrowseSupportFragment()
+        supportFragmentManager
+            .beginTransaction()
+            .add(R.id.content, browseFragment!!, "BrowseFragment")
+            .commit()
+
+        // Set display parameters for the BrowseFragment
+        browseFragment?.headersState = BrowseSupportFragment.HEADERS_ENABLED
+        browseFragment?.brandColor = ContextCompat.getColor(this, R.color.dolphin_blue)
+        buildRowsAdapter()
+
+        browseFragment?.onItemViewClickedListener =
+            OnItemViewClickedListener { itemViewHolder: Presenter.ViewHolder, item: Any?, _: RowPresenter.ViewHolder?, _: Row? ->
+                // Special case: user clicked on a settings row item.
+                if (item is TvSettingsItem) {
+                    presenter.handleOptionSelection(item.itemId, this)
+                } else {
+                    val holder = itemViewHolder as TvGameViewHolder
+
+                    // Start the emulation activity and send the path of the clicked ISO to it.
+                    val paths = GameFileCacheManager.findSecondDiscAndGetPaths(holder.gameFile)
+                    EmulationActivity.launch(this@TvMainActivity, paths, false)
+                }
+            }
+    }
+
+    /**
+     * MainView
+     */
+    override fun setVersionString(version: String) {
+        browseFragment?.title = version
+    }
+
+    override fun launchSettingsActivity(menuTag: MenuTag?) {
+        SettingsActivity.launch(this, menuTag)
+    }
+
+    override fun launchFileListActivity() {
+        if (DirectoryInitialization.preferOldFolderPicker(this)) {
+            FileBrowserHelper.openDirectoryPicker(this, FileBrowserHelper.GAME_EXTENSIONS)
+        } else {
+            val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE)
+            startActivityForResult(intent, MainPresenter.REQUEST_DIRECTORY)
+        }
+    }
+
+    override fun launchOpenFileActivity(requestCode: Int) {
+        val intent = Intent(Intent.ACTION_OPEN_DOCUMENT)
+        intent.addCategory(Intent.CATEGORY_OPENABLE)
+        intent.type = "*/*"
+        startActivityForResult(intent, requestCode)
+    }
+
+    /**
+     * Shows or hides the loading indicator.
+     */
+    override fun setRefreshing(refreshing: Boolean) {
+        swipeRefresh?.isRefreshing = refreshing
+    }
+
+    override fun showGames() {
+        // Kicks off the program services to update all channels
+        TvUtil.updateAllChannels(applicationContext)
+
+        buildRowsAdapter()
+    }
+
+    override fun reloadGrid() {
+        for (row in gameRows) {
+            row.notifyArrayItemRangeChanged(0, row.size())
+        }
+    }
+
+    override fun showGridOptions() {
+        GridOptionDialogFragment().show(supportFragmentManager, "gridOptions")
+    }
+
+    /**
+     * Callback from AddDirectoryActivity. Applies any changes necessary to the GameGridActivity.
+     *
+     * @param requestCode An int describing whether the Activity that is returning did so successfully.
+     * @param resultCode  An int describing what Activity is giving us this callback.
+     * @param result      The information the returning Activity is providing us.
+     */
+    override fun onActivityResult(requestCode: Int, resultCode: Int, result: Intent?) {
+        super.onActivityResult(requestCode, resultCode, result)
+
+        // If the user picked a file, as opposed to just backing out.
+        if (resultCode == RESULT_OK) {
+            val uri = result!!.data
+            when (requestCode) {
+                MainPresenter.REQUEST_DIRECTORY -> {
+                    if (DirectoryInitialization.preferOldFolderPicker(this)) {
+                        presenter.onDirectorySelected(FileBrowserHelper.getSelectedPath(result))
+                    } else {
+                        presenter.onDirectorySelected(result)
+                    }
+                }
+
+                MainPresenter.REQUEST_GAME_FILE -> FileBrowserHelper.runAfterExtensionCheck(
+                    this, uri, FileBrowserHelper.GAME_LIKE_EXTENSIONS
+                ) { EmulationActivity.launch(this, result.data.toString(), false) }
+
+                MainPresenter.REQUEST_WAD_FILE -> FileBrowserHelper.runAfterExtensionCheck(
+                    this, uri, FileBrowserHelper.WAD_EXTENSION
+                ) { presenter.installWAD(result.data.toString()) }
+
+                MainPresenter.REQUEST_WII_SAVE_FILE -> FileBrowserHelper.runAfterExtensionCheck(
+                    this, uri, FileBrowserHelper.BIN_EXTENSION
+                ) { presenter.importWiiSave(result.data.toString()) }
+
+                MainPresenter.REQUEST_NAND_BIN_FILE -> FileBrowserHelper.runAfterExtensionCheck(
+                    this, uri, FileBrowserHelper.BIN_EXTENSION
+                ) { presenter.importNANDBin(result.data.toString()) }
+            }
+        } else {
+            MainPresenter.skipRescanningLibrary()
+        }
+    }
+
+    override fun onRequestPermissionsResult(
+        requestCode: Int,
+        permissions: Array<String>,
+        grantResults: IntArray
+    ) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
+        if (requestCode == PermissionsHandler.REQUEST_CODE_WRITE_PERMISSION) {
+            if (grantResults[0] == PackageManager.PERMISSION_DENIED) {
+                PermissionsHandler.setWritePermissionDenied()
+            }
+
+            DirectoryInitialization.start(this)
+            GameFileCacheManager.startLoad()
+        }
+    }
+
+    /**
+     * Called when the user requests a refresh by swiping down.
+     */
+    override fun onRefresh() {
+        setRefreshing(true)
+        GameFileCacheManager.startRescan()
+    }
+
+    private fun buildRowsAdapter() {
+        val rowsAdapter = ArrayObjectAdapter(ListRowPresenter())
+        gameRows.clear()
+
+        if (!DirectoryInitialization.isWaitingForWriteAccess(this)) {
+            GameFileCacheManager.startLoad()
+        }
+
+        for (platform in Platform.values()) {
+            val row =
+                buildGamesRow(platform, GameFileCacheManager.getGameFilesForPlatform(platform))
+
+            // Add row to the adapter only if it is not empty.
+            if (row != null) {
+                rowsAdapter.add(row)
+            }
+        }
+
+        rowsAdapter.add(buildSettingsRow())
+
+        browseFragment!!.adapter = rowsAdapter
+    }
+
+    private fun buildGamesRow(platform: Platform, gameFiles: Collection<GameFile?>): ListRow? {
+        // If there are no games, don't return a Row.
+        if (gameFiles.isEmpty()) {
+            return null
+        }
+
+        // Create an adapter for this row.
+        val row = ArrayObjectAdapter(GameRowPresenter(this))
+        row.addAll(0, gameFiles)
+
+        // Keep a reference to the row in case we need to refresh it.
+        gameRows.add(row)
+
+        // Create a header for this row.
+        val header = HeaderItem(platform.toInt().toLong(), getString(platform.headerName))
+
+        // Create the row, passing it the filled adapter and the header, and give it to the master adapter.
+        return ListRow(header, row)
+    }
+
+    private fun buildSettingsRow(): ListRow {
+        val rowItems = ArrayObjectAdapter(SettingsRowPresenter())
+        rowItems.apply {
+            add(
+                TvSettingsItem(
+                    R.id.menu_settings,
+                    R.drawable.ic_settings_tv,
+                    R.string.grid_menu_settings
+                )
+            )
+            add(
+                TvSettingsItem(
+                    R.id.button_add_directory,
+                    R.drawable.ic_add_tv,
+                    R.string.add_directory_title
+                )
+            )
+            add(
+                TvSettingsItem(
+                    R.id.menu_grid_options,
+                    R.drawable.ic_list_tv,
+                    R.string.grid_menu_grid_options
+                )
+            )
+            add(
+                TvSettingsItem(
+                    R.id.menu_refresh,
+                    R.drawable.ic_refresh_tv,
+                    R.string.grid_menu_refresh
+                )
+            )
+            add(
+                TvSettingsItem(
+                    R.id.menu_open_file,
+                    R.drawable.ic_play_tv,
+                    R.string.grid_menu_open_file
+                )
+            )
+            add(
+                TvSettingsItem(
+                    R.id.menu_install_wad,
+                    R.drawable.ic_folder_tv,
+                    R.string.grid_menu_install_wad
+                )
+            )
+            add(
+                TvSettingsItem(
+                    R.id.menu_load_wii_system_menu,
+                    R.drawable.ic_folder_tv,
+                    R.string.grid_menu_load_wii_system_menu
+                )
+            )
+            add(
+                TvSettingsItem(
+                    R.id.menu_import_wii_save,
+                    R.drawable.ic_folder_tv,
+                    R.string.grid_menu_import_wii_save
+                )
+            )
+            add(
+                TvSettingsItem(
+                    R.id.menu_import_nand_backup,
+                    R.drawable.ic_folder_tv,
+                    R.string.grid_menu_import_nand_backup
+                )
+            )
+            add(
+                TvSettingsItem(
+                    R.id.menu_online_system_update,
+                    R.drawable.ic_folder_tv,
+                    R.string.grid_menu_online_system_update
+                )
+            )
+            add(
+                TvSettingsItem(
+                    R.id.menu_about,
+                    R.drawable.ic_info_tv,
+                    R.string.grid_menu_about
+                )
+            )
+        }
+
+        // Create a header for this row.
+        val header = HeaderItem(R.string.settings.toLong(), getString(R.string.settings))
+        return ListRow(header, rowItems)
+    }
+}
\ No newline at end of file
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/Platform.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/Platform.java
deleted file mode 100644
index f561feb250..0000000000
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/Platform.java
+++ /dev/null
@@ -1,58 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-package org.dolphinemu.dolphinemu.ui.platform;
-
-import org.dolphinemu.dolphinemu.R;
-
-/**
- * Enum to represent platform (eg GameCube, Wii).
- */
-public enum Platform
-{
-  GAMECUBE(0, R.string.platform_gamecube, "GameCube Games"),
-  WII(1, R.string.platform_wii, "Wii Games"),
-  WIIWARE(2, R.string.platform_wiiware, "WiiWare Games");
-
-  private final int value;
-  private final int headerName;
-  private final String idString;
-
-  Platform(int value, int headerName, String idString)
-  {
-    this.value = value;
-    this.headerName = headerName;
-    this.idString = idString;
-  }
-
-  public static Platform fromInt(int i)
-  {
-    return values()[i];
-  }
-
-  public static Platform fromNativeInt(int i)
-  {
-    // TODO: Proper support for DOL and ELF files
-    boolean in_range = i >= 0 && i < values().length;
-    return values()[in_range ? i : WIIWARE.value];
-  }
-
-  public static Platform fromPosition(int position)
-  {
-    return values()[position];
-  }
-
-  public int toInt()
-  {
-    return value;
-  }
-
-  public int getHeaderName()
-  {
-    return headerName;
-  }
-
-  public String getIdString()
-  {
-    return idString;
-  }
-}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/Platform.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/Platform.kt
new file mode 100644
index 0000000000..0bf3e0ea68
--- /dev/null
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/Platform.kt
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.dolphinemu.dolphinemu.ui.platform
+
+import org.dolphinemu.dolphinemu.R
+
+/**
+ * Enum to represent platform (eg GameCube, Wii).
+ */
+enum class Platform(private val value: Int, val headerName: Int, val idString: String) {
+    GAMECUBE(0, R.string.platform_gamecube, "GameCube Games"),
+    WII(1, R.string.platform_wii, "Wii Games"),
+    WIIWARE(2, R.string.platform_wiiware, "WiiWare Games");
+
+    fun toInt(): Int {
+        return value
+    }
+
+    companion object {
+        fun fromInt(i: Int): Platform {
+            return values()[i]
+        }
+
+        @JvmStatic
+        fun fromNativeInt(i: Int): Platform {
+            // TODO: Proper support for DOL and ELF files
+            val inRange = i >= 0 && i < values().size
+            return values()[if (inRange) i else WIIWARE.value]
+        }
+
+        @JvmStatic
+        fun fromPosition(position: Int): Platform {
+            return values()[position]
+        }
+    }
+}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/PlatformGamesFragment.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/PlatformGamesFragment.java
deleted file mode 100644
index 9393a48baf..0000000000
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/PlatformGamesFragment.java
+++ /dev/null
@@ -1,147 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-package org.dolphinemu.dolphinemu.ui.platform;
-
-import android.os.Bundle;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.core.graphics.Insets;
-import androidx.core.view.ViewCompat;
-import androidx.core.view.WindowInsetsCompat;
-import androidx.fragment.app.Fragment;
-import androidx.recyclerview.widget.RecyclerView;
-import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
-
-import com.google.android.material.color.MaterialColors;
-
-import org.dolphinemu.dolphinemu.R;
-import org.dolphinemu.dolphinemu.adapters.GameAdapter;
-import org.dolphinemu.dolphinemu.databinding.FragmentGridBinding;
-import org.dolphinemu.dolphinemu.layout.AutofitGridLayoutManager;
-import org.dolphinemu.dolphinemu.services.GameFileCacheManager;
-
-public final class PlatformGamesFragment extends Fragment implements PlatformGamesView
-{
-  private static final String ARG_PLATFORM = "platform";
-
-  private SwipeRefreshLayout mSwipeRefresh;
-  private SwipeRefreshLayout.OnRefreshListener mOnRefreshListener;
-
-  private FragmentGridBinding mBinding;
-
-  public static PlatformGamesFragment newInstance(Platform platform)
-  {
-    PlatformGamesFragment fragment = new PlatformGamesFragment();
-
-    Bundle args = new Bundle();
-    args.putSerializable(ARG_PLATFORM, platform);
-
-    fragment.setArguments(args);
-    return fragment;
-  }
-
-  @Override
-  public void onCreate(Bundle savedInstanceState)
-  {
-    super.onCreate(savedInstanceState);
-  }
-
-  @NonNull
-  @Override
-  public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
-          Bundle savedInstanceState)
-  {
-    mBinding = FragmentGridBinding.inflate(inflater, container, false);
-    return mBinding.getRoot();
-  }
-
-  @Override
-  public void onViewCreated(@NonNull View view, Bundle savedInstanceState)
-  {
-    mSwipeRefresh = mBinding.swipeRefresh;
-    GameAdapter adapter = new GameAdapter(requireActivity());
-    adapter.setStateRestorationPolicy(
-            RecyclerView.Adapter.StateRestorationPolicy.PREVENT_WHEN_EMPTY);
-    mBinding.gridGames.setAdapter(adapter);
-    mBinding.gridGames.setLayoutManager(new AutofitGridLayoutManager(requireContext(),
-            getResources().getDimensionPixelSize(R.dimen.card_width)));
-
-    // Set theme color to the refresh animation's background
-    mSwipeRefresh.setProgressBackgroundColorSchemeColor(
-            MaterialColors.getColor(mSwipeRefresh, R.attr.colorPrimary));
-    mSwipeRefresh.setColorSchemeColors(
-            MaterialColors.getColor(mSwipeRefresh, R.attr.colorOnPrimary));
-
-    mSwipeRefresh.setOnRefreshListener(mOnRefreshListener);
-
-    setInsets();
-
-    setRefreshing(GameFileCacheManager.isLoadingOrRescanning());
-
-    showGames();
-  }
-
-  @Override
-  public void onDestroyView()
-  {
-    super.onDestroyView();
-    mBinding = null;
-  }
-
-  @Override
-  public void onItemClick(String gameId)
-  {
-    // No-op for now
-  }
-
-  @Override
-  public void showGames()
-  {
-    if (mBinding == null)
-      return;
-
-    if (mBinding.gridGames.getAdapter() != null)
-    {
-      Platform platform = (Platform) getArguments().getSerializable(ARG_PLATFORM);
-      ((GameAdapter) mBinding.gridGames.getAdapter()).swapDataSet(
-              GameFileCacheManager.getGameFilesForPlatform(platform));
-    }
-  }
-
-  @Override
-  public void refetchMetadata()
-  {
-    ((GameAdapter) mBinding.gridGames.getAdapter()).refetchMetadata();
-  }
-
-  public void setOnRefreshListener(@Nullable SwipeRefreshLayout.OnRefreshListener listener)
-  {
-    mOnRefreshListener = listener;
-
-    if (mSwipeRefresh != null)
-    {
-      mSwipeRefresh.setOnRefreshListener(listener);
-    }
-  }
-
-  public void setRefreshing(boolean refreshing)
-  {
-    mBinding.swipeRefresh.setRefreshing(refreshing);
-  }
-
-  private void setInsets()
-  {
-    ViewCompat.setOnApplyWindowInsetsListener(mBinding.gridGames, (v, windowInsets) ->
-    {
-      Insets insets = windowInsets.getInsets(WindowInsetsCompat.Type.systemBars());
-      v.setPadding(0, 0, 0,
-              insets.bottom + getResources().getDimensionPixelSize(R.dimen.spacing_list) +
-                      getResources().getDimensionPixelSize(R.dimen.spacing_fab));
-      return windowInsets;
-    });
-  }
-}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/PlatformGamesFragment.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/PlatformGamesFragment.kt
new file mode 100644
index 0000000000..5f1139da8a
--- /dev/null
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/PlatformGamesFragment.kt
@@ -0,0 +1,122 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.dolphinemu.dolphinemu.ui.platform
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+import androidx.fragment.app.Fragment
+import androidx.recyclerview.widget.RecyclerView
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout.OnRefreshListener
+import com.google.android.material.color.MaterialColors
+import org.dolphinemu.dolphinemu.R
+import org.dolphinemu.dolphinemu.adapters.GameAdapter
+import org.dolphinemu.dolphinemu.databinding.FragmentGridBinding
+import org.dolphinemu.dolphinemu.layout.AutofitGridLayoutManager
+import org.dolphinemu.dolphinemu.services.GameFileCacheManager
+
+class PlatformGamesFragment : Fragment(), PlatformGamesView {
+    private var swipeRefresh: SwipeRefreshLayout? = null
+    private var onRefreshListener: OnRefreshListener? = null
+
+    private var _binding: FragmentGridBinding? = null
+    private val binding: FragmentGridBinding get() = _binding!!
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        _binding = FragmentGridBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        swipeRefresh = binding.swipeRefresh
+        val gameAdapter = GameAdapter(requireActivity())
+        gameAdapter.stateRestorationPolicy =
+            RecyclerView.Adapter.StateRestorationPolicy.PREVENT_WHEN_EMPTY
+
+        binding.gridGames.apply {
+            adapter = gameAdapter
+            layoutManager = AutofitGridLayoutManager(
+                requireContext(),
+                resources.getDimensionPixelSize(R.dimen.card_width)
+            )
+        }
+
+        // Set theme color to the refresh animation's background
+        binding.swipeRefresh.apply {
+            setProgressBackgroundColorSchemeColor(
+                MaterialColors.getColor(swipeRefresh!!, R.attr.colorPrimary)
+            )
+            setColorSchemeColors(MaterialColors.getColor(swipeRefresh!!, R.attr.colorOnPrimary))
+            setOnRefreshListener(onRefreshListener)
+        }
+
+        setInsets()
+        setRefreshing(GameFileCacheManager.isLoadingOrRescanning())
+        showGames()
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+
+    override fun showGames() {
+        if (_binding == null)
+            return
+
+        if (binding.gridGames.adapter != null) {
+            val platform = requireArguments().getSerializable(ARG_PLATFORM) as Platform
+            (binding.gridGames.adapter as GameAdapter?)!!.swapDataSet(
+                GameFileCacheManager.getGameFilesForPlatform(platform)
+            )
+        }
+    }
+
+    override fun refetchMetadata() {
+        (binding.gridGames.adapter as GameAdapter).refetchMetadata()
+    }
+
+    fun setOnRefreshListener(listener: OnRefreshListener?) {
+        onRefreshListener = listener
+        swipeRefresh?.setOnRefreshListener(listener)
+    }
+
+    override fun setRefreshing(refreshing: Boolean) {
+        binding.swipeRefresh.isRefreshing = refreshing
+    }
+
+    private fun setInsets() {
+        ViewCompat.setOnApplyWindowInsetsListener(binding.gridGames) { v: View, windowInsets: WindowInsetsCompat ->
+            val insets = windowInsets.getInsets(WindowInsetsCompat.Type.systemBars())
+            v.setPadding(
+                0,
+                0,
+                0,
+                insets.bottom + resources.getDimensionPixelSize(R.dimen.spacing_list)
+                        + resources.getDimensionPixelSize(R.dimen.spacing_fab)
+            )
+            windowInsets
+        }
+    }
+
+    companion object {
+        private const val ARG_PLATFORM = "platform"
+
+        @JvmStatic
+        fun newInstance(platform: Platform?): PlatformGamesFragment {
+            val fragment = PlatformGamesFragment()
+            val args = Bundle()
+            args.putSerializable(ARG_PLATFORM, platform)
+            fragment.arguments = args
+            return fragment
+        }
+    }
+}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/PlatformGamesView.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/PlatformGamesView.java
deleted file mode 100644
index 642c531946..0000000000
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/PlatformGamesView.java
+++ /dev/null
@@ -1,32 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-package org.dolphinemu.dolphinemu.ui.platform;
-
-/**
- * Abstraction for a screen representing a single platform's games.
- */
-public interface PlatformGamesView
-{
-  /**
-   * Pass a click event to the view's Presenter. Typically called from the
-   * view's list adapter.
-   *
-   * @param gameId The ID of the game that was clicked.
-   */
-  void onItemClick(String gameId);
-
-  /**
-   * Shows or hides the loading indicator.
-   */
-  void setRefreshing(boolean refreshing);
-
-  /**
-   * To be called when the game file cache is updated.
-   */
-  void showGames();
-
-  /**
-   * Re-fetches game metadata from the game file cache.
-   */
-  void refetchMetadata();
-}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/PlatformGamesView.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/PlatformGamesView.kt
new file mode 100644
index 0000000000..b9d188c2e9
--- /dev/null
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/platform/PlatformGamesView.kt
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.dolphinemu.dolphinemu.ui.platform
+
+/**
+ * Abstraction for a screen representing a single platform's games.
+ */
+interface PlatformGamesView {
+    /**
+     * Pass a click event to the view's Presenter. Typically called from the
+     * view's list adapter.
+     *
+     * @param gameId The ID of the game that was clicked.
+     */
+    fun onItemClick(gameId: String) { /* Empty default impl */ }
+
+    /**
+     * Shows or hides the loading indicator.
+     */
+    fun setRefreshing(refreshing: Boolean)
+
+    /**
+     * To be called when the game file cache is updated.
+     */
+    fun showGames()
+
+    /**
+     * Re-fetches game metadata from the game file cache.
+     */
+    fun refetchMetadata()
+}