Minamp 1.9: install internally, resume after Bluetooth dropouts, log why playback stops

Installed on the SD card (installLocation auto), Minamp was killed whenever USB
storage was turned on. A2DP dropouts send AUDIO_BECOMING_NOISY like an unplug:
after a Bluetooth loss, resume if the speaker is back within 20 s. Focus loss,
media buttons and stream failures now go to the connection log.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

AndroidManifest.xml

@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.minamp"
-    android:versionCode="9"
+    android:versionCode="10"
-    android:versionName="1.8"
+    android:versionName="1.9"
-    android:installLocation="auto">
+    android:installLocation="internalOnly">
 
     <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="10" />
 

src/com/minamp/MediaButtonReceiver.java

@@ -19,6 +19,7 @@ public class MediaButtonReceiver extends BroadcastReceiver {
         if (ev == null) return;
         if (isOrderedBroadcast()) abortBroadcast();
         if (ev.getAction() != KeyEvent.ACTION_DOWN || ev.getRepeatCount() > 0) return;
+        com.minamp.net.DiagLog.log("media button " + ev.getKeyCode() + " (headset / Bluetooth)");
         final Context app = context.getApplicationContext();
         switch (ev.getKeyCode()) {
             case KeyEvent.KEYCODE_HEADSETHOOK:

src/com/minamp/PlayerService.java

@@ -144,6 +144,9 @@ public class PlayerService extends Service implements MediaPlayer.OnPreparedList
     private boolean hasFocus;
     private boolean pausedByFocus;
     private boolean pausedByCall;
+    private boolean pausedByRoute;    // the Bluetooth speaker dropped: resume if it's back soon
+    private long routeLostAt;
+    private boolean btOn;             // audio was going to Bluetooth (A2DP), as last seen while playing
     private WifiManager.WifiLock wifiLock;
     private boolean noisyRegistered;
     private boolean foreground;
@@ -486,6 +489,7 @@ public class PlayerService extends Service implements MediaPlayer.OnPreparedList
     }
 
     private void trackFailed(String msg) {
+        com.minamp.net.DiagLog.log("track failed: " + msg + (refusal != null ? " / " + refusal : "") + " (retry " + (retries + 1) + ")");
         long pos = Math.max(currentPosition(), lastPos);
         if (refusal != null) msg = refusal; // the server's own reason beats "Playback error (1/-1004)"
         boolean permanent = refusalCode >= 400 && refusalCode < 500 && refusalCode != 408 && refusalCode != 429;
@@ -536,6 +540,7 @@ public class PlayerService extends Service implements MediaPlayer.OnPreparedList
 
     private void pause() {
         pausedByFocus = false;
+        pausedByRoute = false;
         playWhenReady = false;
         if (mp != null && prepared) {
             try { mp.pause(); } catch (Exception ignored) {}
@@ -611,6 +616,7 @@ public class PlayerService extends Service implements MediaPlayer.OnPreparedList
 
     private final Runnable ticker = new Runnable() {
         public void run() {
+            if (state == PLAYING) btOn = audio.isBluetoothA2dpOn();
             App.get().handler.postDelayed(this, 1000);
             long now = System.currentTimeMillis();
             if (sleepAt > 0 && now >= sleepAt) {
@@ -692,10 +698,12 @@ public class PlayerService extends Service implements MediaPlayer.OnPreparedList
                 if (pausedByFocus) { pausedByFocus = false; play(); }
                 break;
             case AudioManager.AUDIOFOCUS_LOSS:
+                com.minamp.net.DiagLog.log("paused: another app took the audio (focus lost)");
                 hasFocus = false;
                 pause();
                 break;
             case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT:
+                com.minamp.net.DiagLog.log("paused for a moment: another app needs the audio");
                 if (state == PLAYING) { pause(); pausedByFocus = true; }
                 break;
             case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK:
@@ -716,8 +724,40 @@ public class PlayerService extends Service implements MediaPlayer.OnPreparedList
         }
     };
 
+    /**
+     * Headphones unplugged, or the Bluetooth speaker went away. Android 2.x sends this for any A2DP dropout too
+     * (Wi-Fi and Bluetooth share one radio on these phones, and cheap speakers drop the link now and then):
+     * after a Bluetooth loss, keep watching for the speaker and resume if it's back within 20 s.
+     */
     private final BroadcastReceiver noisy = new BroadcastReceiver() {
-        @Override public void onReceive(Context c, Intent i) { pause(); }
+        @Override public void onReceive(Context c, Intent i) {
+            boolean bt = btOn;
+            com.minamp.net.DiagLog.log("paused: audio output went away (" + (bt ? "Bluetooth speaker dropped" : "headphones unplugged") + ")");
+            pause();
+            if (bt && track != null) {
+                pausedByRoute = true;
+                routeLostAt = System.currentTimeMillis();
+                App.get().handler.removeCallbacks(routeWatch);
+                App.get().handler.postDelayed(routeWatch, 1000);
+            }
+        }
+    };
+
+    private final Runnable routeWatch = new Runnable() {
+        public void run() {
+            if (!pausedByRoute) return;
+            long gone = System.currentTimeMillis() - routeLostAt;
+            if (audio.isBluetoothA2dpOn()) {
+                com.minamp.net.DiagLog.log("Bluetooth speaker back after " + gone / 1000 + "s: resuming");
+                pausedByRoute = false;
+                play();
+            } else if (gone < 20000) {
+                App.get().handler.postDelayed(this, 1000);
+            } else {
+                com.minamp.net.DiagLog.log("Bluetooth speaker didn't come back: staying paused");
+                pausedByRoute = false;
+            }
+        }
     };
 
     private void registerNoisy() {