Intégration de l'API du lecteur YouTube Erreur NullPointerException

Question

Je reçois cette erreur lors de l'intégration du lecteur YouTube dans mon application Android. erreur sur cette ligne - youTubeView.initialize(Config.DEVELOPER_KEY, this);

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.youtube.player.YouTubePlayerView.initialize(java.lang.String, com.google.android.youtube.player.YouTubePlayer$OnInitializedListener)' on a null object reference 

Mon code:

private static final int RECOVERY_DIALOG_REQUEST = 1; 
    private YouTubePlayerView youTubeView; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_you_tube_test); 
     //requestWindowFeature(Window.FEATURE_NO_TITLE); 
     getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
       WindowManager.LayoutParams.FLAG_FULLSCREEN); 

     setContentView(R.layout.activity_main); 

     youTubeView = findViewById(R.id.youtube_view); 

     // Initializing video player with developer key 
     youTubeView.initialize(Config.DEVELOPER_KEY, this); 
    } 

    @Override 
    public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer youTubePlayer, boolean b) { 
     if (!b) { 

      // loadVideo() will auto play video 
      // Use cueVideo() method, if you don't want to play it automatically 
      youTubePlayer.loadVideo(Config.YOUTUBE_VIDEO_CODE); 

      // Hiding player controls 
      youTubePlayer.setPlayerStyle(YouTubePlayer.PlayerStyle.CHROMELESS); 
     } 
    } 

    @Override 
    public void onInitializationFailure(YouTubePlayer.Provider provider, YouTubeInitializationResult youTubeInitializationResult) { 
     if (youTubeInitializationResult.isUserRecoverableError()) { 
      youTubeInitializationResult.getErrorDialog(this, RECOVERY_DIALOG_REQUEST).show(); 
     } else { 
      Toast.makeText(this, youTubeInitializationResult.toString(), Toast.LENGTH_LONG).show(); 
     } 
    } 

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     if (requestCode == RECOVERY_DIALOG_REQUEST) { 
      // Retry initialization if user performed a recovery action 
      getYouTubePlayerProvider().initialize(Config.DEVELOPER_KEY, this); 
     } 
    } 

    private YouTubePlayer.Provider getYouTubePlayerProvider() { 
     return (YouTubePlayerView) findViewById(R.id.youtube_view); 
    } 

Answer 1

Obtenir une clé de développeur API de la console google api et et ajoutez la clé dans la classe séparée comme exemple ci-dessous.

public class Config { private Config() {} public static final String DEVELOPER_KEY="AIzaSyAwhK2xxxxxxx-xxxxxxxxxxxE"; }