Mediaplayer and delay in playing

问题:

I create small application which is media player. I have method where I have a song. I want to delay playing sound after I clicked a button. How I can do this delay. I want to click on the button and after 5 seconds music is playing. I am using: MediaPlayer.create to get song and mediaplayer.start() to start playing, but I don;t know how I can delay start playing my song.

回答1:

Use a Handler in your Activity to delay events such as starting the mediaplayer in your case:

private RefreshHandler mRedrawHandler = new RefreshHandler(); 
 private RefreshHandler mRedrawHandler = new RefreshHandler(); 

     class RefreshHandler extends Handler {  
            @Override  
            public void handleMessage(Message msg) {  
             MyActivity.startMusic();  
            }  

            public void sleep(long delayMillis) {  
              this.removeMessages(0);  
              sendMessageDelayed(obtainMessage(0), delayMillis);  
            }  
          };  

In onClick of button, call mRedrawHandler.sleep(5000); , startMusic() is a method where you are starting the mucsic playback.

回答2:

In onClickListener of the button run a thread to delay for 5 seconds. Then call mediaplayer.start() after the delay.

回答3:

for Delay video we have SeekTo method,,try this it work fine.

                     final int playbackTime=5*1000;

                        System.out.println("Play Back Time====="+playbackTime);

                      getWindow().setFormat(PixelFormat.TRANSLUCENT); 


                          Uri video = Uri.parse(videourl);                 
                          videoView.setVideoURI(video);
                          videoView.requestFocus();
                          videoView.setOnPreparedListener(new OnPreparedListener() 
                          {

                              public void onPrepared(MediaPlayer mp) 
                              {                      

                                  videoView.start();
                                  videoView.seekTo(playbackTime);

                              }
                          });