saut à Millis ne fonctionne pas sur youtube-api

Question

J'ai appris à faire un joueur de youtube-API sur https://www.sitepoint.com/using-the-youtube-api-to-embed-video-in-an-android-app/

Je reçois une erreur lorsque la pratique passe à une certaine seconde

java.lang .NullPointerException: tentative d'invoquer la méthode de l'interface 'com.google.android.youtube.player.YouTubePlayer.seekToMillis void (int)' sur une référence d'objet null

et ceci est mon codage

public class SitepointSample extends YouTubeBaseActivity implements YouTubePlayer.OnInitializedListener { 

private static final int RECOVERY_REQUEST = 1; 
private YouTubePlayerView youtubeView; 

private MyPlayerStateChangeListener playerStateChangeListener; 
private MyPlaybackEventListener playbackEventListener; 

private YouTubePlayer player; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_sitepoint_sample); 

final EditText seekToText = (EditText) findViewById(R.id.seek_to_text); 
Button seekToButton = (Button) findViewById(R.id.seek_to_button); 
seekToButton.setOnClickListener(new View.OnClickListener() { 
    @Override 
    public void onClick(View view) { 
    int skipToSecs = Integer.valueOf(seekToText.getText().toString()); 
    player.seekToMillis(skipToSecs * 1); 
    } 
}); 

playbackEventListener = new MyPlaybackEventListener(); 
playerStateChangeListener = new MyPlayerStateChangeListener(); 

youtubeView = (YouTubePlayerView) findViewById(R.id.youtube_view); 
youtubeView.initialize(Config.YOUTUBE_API_KEY, this); 
} 

@Override 
public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer youTubePlayer, 
            boolean wasRestored) { 
this.player = player; 
if (!wasRestored) { 
    youTubePlayer.setPlayerStateChangeListener(playerStateChangeListener); 
    youTubePlayer.setPlaybackEventListener(playbackEventListener); 
    youTubePlayer 
     .cueVideo("fhWaJi1Hsfo"); //plays video_id == https://www.youtube.com/watch?v=fhWaJi1Hsfo 
} 
} 

@Override 
public void onInitializationFailure(YouTubePlayer.Provider provider, 
            YouTubeInitializationResult errorReason) { 
if (errorReason.isUserRecoverableError()) { 
    errorReason.getErrorDialog(this, RECOVERY_REQUEST).show(); 
} else { 
    String error = String.format(getString(R.string.player_error), errorReason.toString()); 
    Toast.makeText(this, error, Toast.LENGTH_SHORT).show(); 
} 
} 

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

protected YouTubePlayerView getYouTubePlayerProvider() { 
return youtubeView; 
} 

private void showMessage(String message) { 
Toast.makeText(this, message, Toast.LENGTH_SHORT).show(); 
} 

Quelqu'un peut-il gérer cela?

Answer 1

S'il vous plaît donner un essai à ce code:

PlayFragment(start, stop){ 
player.seekTo(40); 

while(player.getCurrentTime() !> 60) 
{ 
    sleep(1000); 
} 

player.stop(); 
} 

function sleep(milliseconds) { 
    var start = new Date().getTime(); 
    for (var i = 0; i < 1e7; i++) { 
    if ((new Date().getTime() - start) > milliseconds){ 
     break; 
    } 
    } 
}