fix: chromecast casting and local playback issues

- Add ProGuard rules to preserve Google Cast SDK classes
- Fix Capacitor plugin dist files to properly register native plugin
- Improve Cast initialization with retry logic in initialize()
- Prevent local audio playback when casting (check isCasting in canplay handler)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: derekross

android/app/proguard-rules.pro

@@ -19,3 +19,15 @@
 # If you keep the line number information, uncomment this to
 # hide the original source file name.
 #-renamesourcefileattribute SourceFile
+
+# Google Cast SDK - preserve all Cast framework classes
+-keep class com.google.android.gms.cast.** { *; }
+-keep class com.google.android.gms.cast.framework.** { *; }
+-keep class com.google.android.gms.common.** { *; }
+
+# Keep CastOptionsProvider
+-keep class com.gameleap.plugins.chromecast.lib.CastOptionsProvider { *; }
+-keep class * extends com.google.android.gms.cast.framework.OptionsProvider { *; }
+
+# Keep MediaRouter classes
+-keep class androidx.mediarouter.** { *; }

plugins/capacitor-chromecast/android/src/main/java/com/gameleap/plugins/chromecast/ChromecastConnection.java

@@ -132,11 +132,38 @@ ChromecastSession getChromecastSession() {
     public void initialize(final String applicationId, final PluginCall pluginCall) {
         activity.runOnUiThread(new Runnable() {
             public void run() {
-                // Check if Cast is available (GMS must be present)
-                if (!castAvailable) {
-                    android.util.Log.i("ChromecastConnection", "Cast not available during initialize - GMS may be missing");
-                    pluginCall.reject("Google Play Services not available - Cast disabled");
-                    return;
+                // Try to initialize Cast if not already done
+                if (!castAvailable && cachedCastContext == null) {
+                    // Check if Google Play Services is available
+                    if (!isGooglePlayServicesAvailable()) {
+                        android.util.Log.i("ChromecastConnection", "Google Play Services not available - Cast disabled");
+                        pluginCall.reject("Google Play Services not available - Cast disabled");
+                        return;
+                    }
+
+                    // Try to get CastContext
+                    try {
+                        CastContext ctx = getContext();
+                        if (ctx != null) {
+                            if (listener != null) {
+                                ctx.addCastStateListener(listener);
+                            }
+                            castAvailable = true;
+                            android.util.Log.i("ChromecastConnection", "Cast initialized successfully in initialize()");
+                        } else {
+                            android.util.Log.w("ChromecastConnection", "CastContext is null");
+                            pluginCall.reject("Cast framework not available");
+                            return;
+                        }
+                    } catch (Exception e) {
+                        android.util.Log.e("ChromecastConnection", "Failed to initialize Cast in initialize(): " + e.getMessage());
+                        pluginCall.reject("Cast framework error: " + e.getMessage());
+                        return;
+                    } catch (Throwable t) {
+                        android.util.Log.e("ChromecastConnection", "Cast framework error in initialize(): " + t.getMessage());
+                        pluginCall.reject("Cast framework error: " + t.getMessage());
+                        return;
+                    }
                 }
 
                 // If the app Id changed

plugins/capacitor-chromecast/dist/esm/index.js

@@ -1,11 +1,5 @@
-// Web stub for Chromecast plugin - native only
-export const Chromecast = {
-  initialize: () => Promise.reject('Chromecast is only available on native platforms'),
-  requestSession: () => Promise.reject('Chromecast is only available on native platforms'),
-  launchMedia: () => Promise.reject('Chromecast is only available on native platforms'),
-  castPlay: () => Promise.reject('Chromecast is only available on native platforms'),
-  castPause: () => Promise.reject('Chromecast is only available on native platforms'),
-  castStop: () => Promise.reject('Chromecast is only available on native platforms'),
-  endSession: () => Promise.reject('Chromecast is only available on native platforms'),
-  addListener: () => Promise.resolve({ remove: () => {} }),
-};
+import { registerPlugin } from '@capacitor/core';
+const Chromecast = registerPlugin('Chromecast', {
+    web: () => import('./web').then(m => new m.ChromecastWeb()),
+});
+export { Chromecast };

plugins/capacitor-chromecast/dist/plugin.cjs.js

@@ -1,13 +1,11 @@
-// Web stub for Chromecast plugin - native only
-const Chromecast = {
-  initialize: () => Promise.reject('Chromecast is only available on native platforms'),
-  requestSession: () => Promise.reject('Chromecast is only available on native platforms'),
-  launchMedia: () => Promise.reject('Chromecast is only available on native platforms'),
-  castPlay: () => Promise.reject('Chromecast is only available on native platforms'),
-  castPause: () => Promise.reject('Chromecast is only available on native platforms'),
-  castStop: () => Promise.reject('Chromecast is only available on native platforms'),
-  endSession: () => Promise.reject('Chromecast is only available on native platforms'),
-  addListener: () => Promise.resolve({ remove: () => {} }),
-};
-
-module.exports = { Chromecast };
+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+var core = require('@capacitor/core');
+
+const Chromecast = core.registerPlugin('Chromecast', {
+    web: () => Promise.resolve().then(function () { return require('./web'); }).then(m => new m.ChromecastWeb()),
+});
+
+exports.Chromecast = Chromecast;

plugins/capacitor-chromecast/dist/plugin.js

@@ -1,19 +1,14 @@
-// Web stub for Chromecast plugin - native only
-var capacitorChromecast = (function (exports) {
-  'use strict';
+var capacitorChromecast = (function (exports, core) {
+    'use strict';
 
-  const Chromecast = {
-    initialize: () => Promise.reject('Chromecast is only available on native platforms'),
-    requestSession: () => Promise.reject('Chromecast is only available on native platforms'),
-    launchMedia: () => Promise.reject('Chromecast is only available on native platforms'),
-    castPlay: () => Promise.reject('Chromecast is only available on native platforms'),
-    castPause: () => Promise.reject('Chromecast is only available on native platforms'),
-    castStop: () => Promise.reject('Chromecast is only available on native platforms'),
-    endSession: () => Promise.reject('Chromecast is only available on native platforms'),
-    addListener: () => Promise.resolve({ remove: () => {} }),
-  };
+    const Chromecast = core.registerPlugin('Chromecast', {
+        web: () => Promise.resolve().then(function () { return require('./web'); }).then(m => new m.ChromecastWeb()),
+    });
 
-  exports.Chromecast = Chromecast;
+    exports.Chromecast = Chromecast;
 
-  return exports;
-})({});
+    Object.defineProperty(exports, '__esModule', { value: true });
+
+    return exports;
+
+})({}, capacitorExports);

src/contexts/MusicPlayerContext.tsx

@@ -221,7 +221,8 @@ export function MusicPlayerProvider({ children }: { children: React.ReactNode })
     const handleCanPlay = () => {
       console.log('Audio can play');
       dispatch({ type: 'SET_LOADING', payload: false });
-      if (state.isPlaying) {
+      // Don't auto-play locally when casting
+      if (state.isPlaying && !state.isCasting) {
         audio.play().catch((error) => {
           console.error('Audio play failed on canplay:', error);
           if (error.name === 'NotAllowedError') {
@@ -263,7 +264,7 @@ export function MusicPlayerProvider({ children }: { children: React.ReactNode })
       audio.removeEventListener('ended', handleEnded);
       audio.removeEventListener('error', handleError);
     };
-  }, [state.isPlaying]);
+  }, [state.isPlaying, state.isCasting]);
 
   // Update audio source when track changes
   useEffect(() => {