Android YouTube API “An error occurred while initializing YouTube player”

问题

I have a Fragment containing a YouTubePlayerSupportFragment. This fragment is inside a ViewPager.

The player works fine on my Galaxy S3 Android phone (4.3 / API 18) and on my VM (4.3 / API 18). But on every other phones i've tried, the player shows a An error occurred while initializing YouTube player message and throw a onInitializationFailure with an UNKNOWN_ERROR reason.

I've checked the LogCat and there is absolutly no other error/warning, from my app or from youtube.

It didnt work on the following devices:

• Android 4.2.1 - Youtube 10.18.55
• Android 4.4.2 - Youtube 10.18.55
• Android 5.1 - Youtube above requirement

I have absolutely no idea why it worked on some and why it didn't on others.

Here is the code of the Fragment:

    public class RoomFragmentVideo extends PlugFragment implements
    YouTubePlayer.OnInitializedListener, YouTubePlayer.PlayerStateChangeListener {
            private static String CLASS_DBG_NAME = "RoomFragmentVideo";

            private static final int RECOVERY_DIALOG_REQUEST = 1;

            private YouTubePlayerSupportFragment youTubePlayer ;
            private int playerInitialized;
            private YouTubePlayer player;

            static PlugFragment init(Bundle args) {
                     RoomFragmentVideo roomFrag = new RoomFragmentVideo();
                     // Supply val input as an argument.
                     roomFrag.setArguments(args);
                     Log.d(Constants.APP_DBG_LOG + CLASS_DBG_NAME + " - ","Created with args Room: "  + ((String)args.get(RoomFragmentChat.ARG_ROOM)));
                     return roomFrag;
            }

            @Override
            public void onCreate(Bundle savedInstanceState) {
             super.onCreate(savedInstanceState);
             thisActivity = (AppCompatActivity) this.getActivity();
            }

            @Override
            public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {
                     View rootview = inflater.inflate(R.layout.fragment_roomvideo, container,false);
                     youTubePlayer = YouTubePlayerSupportFragment.newInstance();
                     FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
                     transaction.add(R.id.youtube_fragment, youTubePlayer).commit();
                     youTubePlayer.initialize(YouTubeDeveloperKey.DEVELOPER_KEY, this);
                     return rootview;

            }

            protected YouTubePlayer.Provider getYouTubePlayerProvider() {
                return youTubePlayer;
            }

            @Override
            public void onActivityResult(int requestCode, int resultCode, Intent data) {
                if (requestCode == RECOVERY_DIALOG_REQUEST) {
                  getYouTubePlayerProvider().initialize(YouTubeDeveloperKey.DEVELOPER_KEY, this);
                }
            }         

            @Override
            public void onInitializationFailure(YouTubePlayer.Provider provider,
                          YouTubeInitializationResult errorReason) {
                    if (errorReason.isUserRecoverableError()) {
                          errorReason.getErrorDialog(this.getActivity(), 1).show();
                          Log.e(Constants.APP_DBG_LOG + CLASS_DBG_NAME + " - YouTube" ,"[Recoverable] Reason : " + errorReason.toString());
                    }
                    else {
                            //String errorMessage = String.format(getString(R.string.error_player), errorReason.toString());
                            String errorMessage = "Video couldnt load";
                            Toast.makeText(this.getActivity(), errorMessage, Toast.LENGTH_LONG).show();
                            Log.e(Constants.APP_DBG_LOG + CLASS_DBG_NAME + " - YouTube" ,"[Unrecoverable] Reason : " + errorReason.toString() + " Message: " + errorMessage);
                            playerInitialized = -1; 
                    }

            }

            @Override
            public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer player,
                          boolean wasRestored) {
                            this.player = player;
                            player.setPlayerStyle(PlayerStyle.CHROMELESS);
                            player.loadVideo(this.videoID);
                            playerInitialized = 1;
            }

            @Override
            public void onPause(){
                    super.onPause();
                    Log.v(Constants.APP_DBG_LOG + CLASS_DBG_NAME + " - " , "onPause");
            }

            @Override
            public void onResume(){
                    super.onResume();
                    Log.v(Constants.APP_DBG_LOG + CLASS_DBG_NAME + " - " , "onResume");
            }

            @Override
            public void onStop(){
                    super.onStop();
                    player = null;
                    playerInitialized = -2;
                    Log.v(Constants.APP_DBG_LOG + CLASS_DBG_NAME + " - " , "onStop");
            }

            @Override
            public void setUserVisibleHint (boolean isVisibleToUser){
                    super.setUserVisibleHint(isVisibleToUser);
                    if(isVisibleToUser){
                            this.resume();
                    }
                    Log.v(Constants.APP_DBG_LOG + CLASS_DBG_NAME + " - " , "setUserVisibleHint, status: " + isVisibleToUser);
            }

            @Override
            public void onAdStarted() {
                    return;                
            }

            @Override
            public void onError(ErrorReason arg0) {
                    Log.e(Constants.APP_DBG_LOG + CLASS_DBG_NAME + " - " +"YoutubePlayer", arg0.name());
                    Toast.makeText(thisActivity, "YoutubePlayer error: " + arg0.name(), Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onLoaded(String arg0) {
                    return;
            }

            @Override
            public void onLoading() {
                    return;
            }

            @Override
            public void onVideoEnded() {
                    return;
            }

            @Override
            public void onVideoStarted() {
                    return;

            }
    }

And here is the XML:

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >

       <FrameLayout
            android:id="@+id/youtube_fragment"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            android:visibility="visible" />

    </LinearLayout>

What am I doing wrong ?

Thanks a lot !

回答1:

The problem was in fact proguard. Here is what i added to the proguard-project.txt file:

# keep youtube / google
-keep class com.google.api.services.** { *; }
-keep class com.google.android.youtube.player.** { *; }
# Needed by google-api-client to keep generic types and @Key annotations accessed via reflection
-keepclassmembers class * {
  @com.google.api.client.util.Key <fields>;
}

回答2:

This one worked for me:

-keepclassmembers class fqcn.of.javascript.interface.for.webview {
   public *;
}

来源：https://stackoverflow.com/questions/30428535/android-youtube-api-an-error-occurred-while-initializing-youtube-player