傳遞Youtube視頻ID通過意圖

Question

請考慮我有一個對象，在視頻列表視圖中將YouTube videoId作爲其中一個參數。我知道如何使用OnItemClickListener以及如何通過意圖傳遞額外信息。當我到達接收活動時，我必須在onCreate方法中調用intent.getStringExtra（「key」）。我需要在另一種方法onInitializationSuccess中檢索videoId，因爲當我調用cueVideo（videoId）方法時。你能不能解釋一下怎麼做，但爲什麼我可以理解我自己的成長。

public class PlayVideo extends YouTubeBaseActivity 
    implements YouTubePlayer.OnInitializedListener{ 


private String GOOGLE_API_KEY = "AIzaSyCKcPfcvaFtN_izxXg7lzEcKVdF0A-7y1Q"; 
String VIDEO_ID = "ZHAe-SaplCw"; 


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

    YouTubePlayerView playerView = (YouTubePlayerView) findViewById(R.id.player_view); 
    playerView.initialize(GOOGLE_API_KEY, this); 

    //Get videoId from current ListView Object 
    Intent getVideoId = getIntent(); 
    String videoId = getVideoId.getStringExtra("videoIdExtra"); 

} 

@Override 
public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer youTubePlayer, boolean wasRestored) { 
    Toast.makeText(this, "Video Playing", Toast.LENGTH_SHORT).show(); 
    youTubePlayer.setPlayerStateChangeListener(playerStateChangeListener); 
    youTubePlayer.setPlaybackEventListener(playbackEventListener); 

    if(!wasRestored){ 
     youTubePlayer.cueVideo(VIDEO_ID); 
    } 
} 

private YouTubePlayer.PlaybackEventListener playbackEventListener = new YouTubePlayer.PlaybackEventListener() { 
    @Override 
    public void onPlaying() { 

    } 

    @Override 
    public void onPaused() { 

    } 

    @Override 
    public void onStopped() { 

    } 

    @Override 
    public void onBuffering(boolean b) { 

    } 

    @Override 
    public void onSeekTo(int i) { 

    } 
}; 

YouTubePlayer.PlayerStateChangeListener playerStateChangeListener = new YouTubePlayer.PlayerStateChangeListener() { 
    @Override 
    public void onLoading() { 

    } 

    @Override 
    public void onLoaded(String s) { 

    } 

    @Override 
    public void onAdStarted() { 

    } 

    @Override 
    public void onVideoStarted() { 

    } 

    @Override 
    public void onVideoEnded() { 

    } 

    @Override 
    public void onError(YouTubePlayer.ErrorReason errorReason) { 

    } 
}; 

@Override 
public void onInitializationFailure(YouTubePlayer.Provider provider, YouTubeInitializationResult youTubeInitializationResult) { 
    Toast.makeText(this, "Play Failed", Toast.LENGTH_SHORT).show(); 
} 


} 

Answer 1

要麼聲明一個成員變量，或只是調用在該另一方法getIntent並獲取ID那裏。

你能解釋一下[...]爲什麼

因爲你想使用我一直使用的是什麼和它的做工精細的onCreate

的

Answer 2

之外的價值。

public class VideoPlayerActivity extends YouTubeBaseActivity implements YouTubePlayer.OnInitializedListener { 
private static final int RECOVERY_REQUEST = 1; 
private YouTubePlayerView youTubeView; 
private MyPlayerStateChangeListener playerStateChangeListener; 
private MyPlaybackEventListener playbackEventListener; 
private YouTubePlayer player; 
private String videoKey; 

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

    youTubeView = (YouTubePlayerView) findViewById(R.id.youtube_view); 
    youTubeView.initialize(Constants.YOUTUBE_API_KEY, this); 
    playerStateChangeListener = new MyPlayerStateChangeListener(); 
    playbackEventListener = new MyPlaybackEventListener(); 

    Bundle bundle = getIntent().getExtras(); 
    videoKey = bundle.getString(Constants.YOUTUBE_VIDEO_KEY, null); 

} 

@Override 
protected void onResume() { 
    super.onResume(); 
} 

@Override 
public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer player, boolean wasRestored) { 
    this.player = player; 
    player.setPlayerStateChangeListener(playerStateChangeListener); 
    player.setPlaybackEventListener(playbackEventListener); 
    if (!wasRestored) { 
     player.cueVideo(Strings.isNullOrEmpty(videoKey) ? "fhWaJi1Hsfo" : videoKey); 
     // Plays 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_LONG).show(); 
    } 
} 

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

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

private final class MyPlaybackEventListener implements YouTubePlayer.PlaybackEventListener { 

    @Override 
    public void onPlaying() { 
     // Called when playback starts, either due to user action or call to play(). 

    } 

    @Override 
    public void onPaused() { 
     // Called when playback is paused, either due to user action or call to pause(). 

    } 

    @Override 
    public void onStopped() { 
     // Called when playback stops for a reason other than being paused. 

    } 

    @Override 
    public void onBuffering(boolean b) { 
     // Called when buffering starts or ends. 
    } 

    @Override 
    public void onSeekTo(int i) { 
     // Called when a jump in playback position occurs, either 
     // due to user scrubbing or call to seekRelativeMillis() or seekToMillis() 
    } 
} 

private final class MyPlayerStateChangeListener implements YouTubePlayer.PlayerStateChangeListener { 

    @Override 
    public void onLoading() { 
     // Called when the player is loading a video 
     // At this point, it's not ready to accept commands affecting playback such as play() or pause() 
    } 

    @Override 
    public void onLoaded(String s) { 
     // Called when a video is done loading. 
     // Playback methods such as play(), pause() or seekToMillis(int) may be called after this callback. 
     player.play(); 
    } 

    @Override 
    public void onAdStarted() { 
     // Called when playback of an advertisement starts. 
    } 

    @Override 
    public void onVideoStarted() { 
     // Called when playback of the video starts. 
    } 

    @Override 
    public void onVideoEnded() { 
     // Called when the video reaches its end. 
    } 

    @Override 
    public void onError(YouTubePlayer.ErrorReason errorReason) { 
     // Called when an error occurs. 
    } 
} 
} 

要調用這個

Intent intent = new Intent(mContext, VideoPlayerActivity.class); intent.putExtra(Constants.YOUTUBE_VIDEO_KEY, youtubeKey); mContext.startActivity(intent);

也Constants.java文件

public static final String YOUTUBE_VIDEO_KEY = "you_tube_video_key"; public static final String YOUTUBE_API_KEY = "YOUR_API_KEY"; 希望這可以幫助你