Reviews onDispose calls to make sure the onDispose is disposing the data from the previous composable, since it can happen AFTER a new composition already took place. So the references must match the old composition.

amethyst/src/main/java/com/vitorpamplona/amethyst/service/playback/composable/ControlWhenPlayerIsActive.kt

@@ -20,6 +20,7 @@
  */
 package com.vitorpamplona.amethyst.service.playback.composable
 
+import android.view.View
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
@@ -67,23 +68,30 @@ fun ControlWhenPlayerIsActive(
 
     // Keeps the screen on while playing and viewing videos.
     DisposableEffect(key1 = controller, key2 = view) {
-        val listener =
-            object : Player.Listener {
-                override fun onIsPlayingChanged(isPlaying: Boolean) {
-                    // doesn't consider the mutex because the screen can turn off if the video
-                    // being played in the mutex is not visible.
-                    if (view.keepScreenOn != isPlaying) {
-                        view.keepScreenOn = isPlaying
-                    }
-                }
-            }
+        val listener = PlayerEventListener(view)
 
         controller.addListener(listener)
         onDispose {
-            if (view.keepScreenOn) {
-                view.keepScreenOn = false
-            }
             controller.removeListener(listener)
+            listener.destroy()
+        }
+    }
+}
+
+class PlayerEventListener(
+    val view: View,
+) : Player.Listener {
+    override fun onIsPlayingChanged(isPlaying: Boolean) {
+        // doesn't consider the mutex because the screen can turn off if the video
+        // being played in the mutex is not visible.
+        if (view.keepScreenOn != isPlaying) {
+            view.keepScreenOn = isPlaying
+        }
+    }
+
+    fun destroy() {
+        if (view.keepScreenOn) {
+            view.keepScreenOn = false
         }
     }
 }

amethyst/src/main/java/com/vitorpamplona/amethyst/service/playback/composable/GetVideoController.kt

@@ -54,6 +54,10 @@ fun GetVideoController(
     val scope = rememberCoroutineScope()
 
     // Prepares a VideoPlayer from the foreground service.
+    //
+    // TODO: Review this code because a new Disposable Effect can run
+    // before the onDispose of the previous composable and the onDispose
+    // sometimes affects the new variables, not the old ones.
     DisposableEffect(key1 = mediaItem.src.videoUri) {
         // If it is not null, the user might have come back from a playing video, like clicking on
         // the notification of the video player.

amethyst/src/main/java/com/vitorpamplona/amethyst/service/playback/composable/wavefront/Waveform.kt

@@ -56,21 +56,25 @@ fun Waveform(
 
     val restartFlow = remember { mutableIntStateOf(0) }
 
+    val myController = mediaControllerState.controller
+
     // Keeps the screen on while playing and viewing videos.
-    DisposableEffect(key1 = mediaControllerState.controller) {
-        val listener =
-            object : Player.Listener {
-                override fun onIsPlayingChanged(isPlaying: Boolean) {
-                    // doesn't consider the mutex because the screen can turn off if the video
-                    // being played in the mutex is not visible.
-                    if (isPlaying) {
-                        restartFlow.intValue += 1
+    if (myController != null) {
+        DisposableEffect(key1 = myController) {
+            val listener =
+                object : Player.Listener {
+                    override fun onIsPlayingChanged(isPlaying: Boolean) {
+                        // doesn't consider the mutex because the screen can turn off if the video
+                        // being played in the mutex is not visible.
+                        if (isPlaying) {
+                            restartFlow.intValue += 1
+                        }
                     }
                 }
-            }
 
-        mediaControllerState.controller?.addListener(listener)
-        onDispose { mediaControllerState.controller?.removeListener(listener) }
+            myController.addListener(listener)
+            onDispose { myController.removeListener(listener) }
+        }
     }
 
     LaunchedEffect(key1 = restartFlow.intValue) {

amethyst/src/main/java/com/vitorpamplona/amethyst/service/playback/pip/BackgroundMedia.kt

@@ -39,7 +39,7 @@ object BackgroundMedia {
     fun removeBackgroundControllerAndReleaseIt() {
         bgInstance.value?.let {
             PlaybackServiceClient.removeController(it)
-            clearBackground()
+            bgInstance.tryEmit(null)
         }
     }
 
@@ -47,7 +47,9 @@ object BackgroundMedia {
         bgInstance.tryEmit(mediaControllerState)
     }
 
-    fun clearBackground() {
-        bgInstance.tryEmit(null)
+    fun clearBackground(mediaControllerState: MediaControllerState) {
+        if (bgInstance.value == mediaControllerState) {
+            bgInstance.tryEmit(null)
+        }
     }
 }

amethyst/src/main/java/com/vitorpamplona/amethyst/service/playback/pip/PictureInPicture.kt

@@ -58,9 +58,8 @@ fun rememberIsInPipMode(): Boolean {
             Consumer<PictureInPictureModeChangedInfo> { info ->
                 pipMode = info.isInPictureInPictureMode
             }
-        activity.addOnPictureInPictureModeChangedListener(
-            observer,
-        )
+
+        activity.addOnPictureInPictureModeChangedListener(observer)
         onDispose { activity.removeOnPictureInPictureModeChangedListener(observer) }
     }
     return pipMode

amethyst/src/main/java/com/vitorpamplona/amethyst/service/playback/pip/PipVideoView.kt

@@ -81,7 +81,7 @@ fun PipVideo(controller: MediaControllerState) {
     DisposableEffect(controller) {
         BackgroundMedia.switchKeepPlaying(controller)
         onDispose {
-            BackgroundMedia.clearBackground()
+            BackgroundMedia.clearBackground(controller)
         }
     }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/actions/NewUserMetadataScreen.kt

@@ -40,7 +40,6 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -74,12 +73,6 @@ fun NewUserMetadataScreen(
         postViewModel.load(accountViewModel.account)
     }
 
-    DisposableEffect(Unit) {
-        onDispose {
-            postViewModel.clear()
-        }
-    }
-
     Scaffold(
         topBar = {
             TopAppBar(

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/AppBottomBar.kt

@@ -104,7 +104,6 @@ fun keyboardAsState(): State<Keyboard> {
                 }
             }
         view.viewTreeObserver.addOnGlobalLayoutListener(onGlobalListener)
-
         onDispose { view.viewTreeObserver.removeOnGlobalLayoutListener(onGlobalListener) }
     }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/AccountState.kt

@@ -22,7 +22,6 @@ package com.vitorpamplona.amethyst.ui.screen
 
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
-import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.Stable
 import androidx.lifecycle.ViewModelStore
 import androidx.lifecycle.ViewModelStoreOwner
@@ -55,11 +54,13 @@ fun SetAccountCentricViewModelStore(
         content()
     }
 
-    DisposableEffect(key1 = state) {
-        onDispose {
-            state.currentViewModelStore.viewModelStore.clear()
-        }
-    }
+    // moved this clearing activity to the viewmodel account
+    // because the new composable might run before the onDispose.
+    // DisposableEffect(key1 = state) {
+    //    onDispose {
+    //        state.currentViewModelStore.viewModelStore.clear()
+    //    }
+    // }
 }
 
 class AccountCentricViewModelStore : ViewModelStoreOwner {

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/LoggedInPage.kt

@@ -21,6 +21,7 @@
 package com.vitorpamplona.amethyst.ui.screen.loggedIn
 
 import android.app.Activity
+import android.content.Intent
 import android.util.Log
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
@@ -216,25 +217,27 @@ private fun ListenToExternalSignerIfNeeded(accountViewModel: AccountViewModel) {
                     }
                 }
 
+            val launcher: (Intent) -> Unit = {
+                try {
+                    launcher.launch(it)
+                } catch (e: Exception) {
+                    if (e is CancellationException) throw e
+                    Log.e("Signer", "Error opening Signer app", e)
+                    accountViewModel.toastManager.toast(
+                        R.string.error_opening_external_signer,
+                        R.string.error_opening_external_signer_description,
+                    )
+                }
+            }
+
             lifeCycleOwner.lifecycle.addObserver(observer)
             accountViewModel.account.signer.launcher.registerLauncher(
-                launcher = {
-                    try {
-                        launcher.launch(it)
-                    } catch (e: Exception) {
-                        if (e is CancellationException) throw e
-                        Log.e("Signer", "Error opening Signer app", e)
-                        accountViewModel.toastManager.toast(
-                            R.string.error_opening_external_signer,
-                            R.string.error_opening_external_signer_description,
-                        )
-                    }
-                },
+                launcher = launcher,
                 contentResolver = Amethyst.instance::contentResolverFn,
             )
             onDispose {
                 accountViewModel.account.signer.launcher
-                    .clearLauncher()
+                    .clearLauncherIf(launcher)
                 lifeCycleOwner.lifecycle.removeObserver(observer)
             }
         }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/profile/relays/TabRelays.kt

@@ -64,8 +64,6 @@ fun TabRelays(
         lifeCycleOwner.lifecycle.addObserver(observer)
         onDispose {
             lifeCycleOwner.lifecycle.removeObserver(observer)
-            println("Profile Relay Dispose")
-            feedViewModel.unsubscribeTo(user)
         }
     }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedOff/LoginScreen.kt

@@ -641,26 +641,30 @@ private fun PrepareExternalSignerReceiver(onLogin: (pubkey: String, packageName:
     val activity = getActivity() as MainActivity
 
     DisposableEffect(launcher, activity, externalSignerLauncher) {
-        externalSignerLauncher.registerLauncher(
-            launcher = {
-                try {
-                    launcher.launch(it)
-                } catch (e: Exception) {
-                    if (e is CancellationException) throw e
-                    Log.e("Signer", "Error opening Signer app", e)
-                    scope.launch(Dispatchers.Main) {
-                        Toast
-                            .makeText(
-                                Amethyst.instance,
-                                R.string.error_opening_external_signer,
-                                Toast.LENGTH_SHORT,
-                            ).show()
-                    }
+        val launcher: (Intent) -> Unit = {
+            try {
+                launcher.launch(it)
+            } catch (e: Exception) {
+                if (e is CancellationException) throw e
+                Log.e("Signer", "Error opening Signer app", e)
+                scope.launch(Dispatchers.Main) {
+                    Toast
+                        .makeText(
+                            Amethyst.instance,
+                            R.string.error_opening_external_signer,
+                            Toast.LENGTH_SHORT,
+                        ).show()
                 }
-            },
+            }
+        }
+
+        externalSignerLauncher.registerLauncher(
+            launcher = launcher,
             contentResolver = Amethyst.instance::contentResolverFn,
         )
-        onDispose { externalSignerLauncher.clearLauncher() }
+        onDispose {
+            externalSignerLauncher.clearLauncherIf(launcher)
+        }
     }
 
     LaunchedEffect(externalSignerLauncher) {

quartz/src/main/java/com/vitorpamplona/quartz/nip55AndroidSigner/ExternalSignerLauncher.kt

@@ -114,9 +114,11 @@ class ExternalSignerLauncher(
     }
 
     /** Call this function when the activity is destroyed or is about to be replaced. */
-    fun clearLauncher() {
-        this.signerAppLauncher = null
-        this.contentResolver = null
+    fun clearLauncherIf(launcher: ((Intent) -> Unit)) {
+        if (signerAppLauncher == launcher) {
+            this.signerAppLauncher = null
+            this.contentResolver = null
+        }
     }
 
     fun newResult(data: Intent) {