From 38b5c7370c47a6760bfce4cb8f9c45ab5d403dbb Mon Sep 17 00:00:00 2001
From: Tom Pratt <tom.pratt@outlook.com>
Date: Wed, 22 Apr 2026 18:46:12 +0200
Subject: Implement StopGame callback and use it to finish the emulation
 activity

---
 .../org/dolphinemu/dolphinemu/features/netplay/Netplay.kt   | 13 ++++++++++++-
 .../dolphinemu/dolphinemu/fragments/EmulationFragment.kt    |  7 +++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

(limited to 'Source/Android/app/src/main/java')

diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/netplay/Netplay.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/netplay/Netplay.kt
index 94de9bd98c..a90d1b00d8 100644
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/netplay/Netplay.kt
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/netplay/Netplay.kt
@@ -44,6 +44,9 @@ object Netplay {
     private val _launchGame = Channel<String>(Channel.CONFLATED)
     val launchGame = _launchGame.receiveAsFlow()
 
+    private val _stopGame = Channel<Unit>(Channel.CONFLATED)
+    val stopGame = _stopGame.receiveAsFlow()
+
     private val _connectionErrors = Channel<String>(Channel.BUFFERED)
     val connectionErrors = _connectionErrors.receiveAsFlow()
 
@@ -123,6 +126,7 @@ object Netplay {
         }
 
         _launchGame.flush()
+        _stopGame.flush()
         _connectionErrors.flush()
         _players.resetReplayCache()
         _messages.resetReplayCache()
@@ -166,9 +170,16 @@ object Netplay {
     @JvmStatic
     fun onBootGame(gameFilePath: String, bootSessionDataPointer: Long) {
         this.bootSessionDataPointer = bootSessionDataPointer
+        _stopGame.flush()
         _launchGame.trySend(gameFilePath)
     }
 
+    @Keep
+    @JvmStatic
+    fun onStopGame() {
+        _stopGame.trySend(Unit)
+    }
+
     @JvmStatic
     fun onConnectionError(message: String) {
         _connectionErrors.trySend(message)
@@ -244,6 +255,6 @@ object Netplay {
     }
 }
 
-private fun Channel<String>.flush() {
+private fun <T> Channel<T>.flush() {
     while (this.tryReceive().isSuccess) Unit
 }
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/fragments/EmulationFragment.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/fragments/EmulationFragment.kt
index 4ee4aee8aa..61a5493950 100644
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/fragments/EmulationFragment.kt
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/fragments/EmulationFragment.kt
@@ -10,6 +10,9 @@ import android.view.SurfaceHolder
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.lifecycleScope
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
 import org.dolphinemu.dolphinemu.NativeLibrary
 import org.dolphinemu.dolphinemu.activities.EmulationActivity
 import org.dolphinemu.dolphinemu.databinding.FragmentEmulationBinding
@@ -220,6 +223,10 @@ class EmulationFragment : Fragment(), SurfaceHolder.Callback {
                     val paths = requireNotNull(gamePaths) {
                         "Cannot start emulation without any game paths"
                     }
+                    lifecycleScope.launch {
+                        Netplay.stopGame.first()
+                        stopEmulation()
+                    }
                     NativeLibrary.RunNetPlay(paths, riivolution)
                 } else {
                     Log.debug("[EmulationFragment] Starting emulation thread.")
-- 
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