Question

我试图让我的Android应用上的视频背靠背播放，并且只有在完整地观看每个视频后才能播放。

我已经提出以下代码：

package com.davekelley;
import android.support.v7.app.ActionBarActivity;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.media.MediaPlayer;
import android.net.Uri;
import android.widget.MediaController;
import android.widget.VideoView;

public class Watch extends Activity {

MediaPlayer player;

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

    player = new MediaPlayer();

    player.setOnCompletionListener(new OnCompletionListener() {
        public void onCompletion(MediaPlayer mp) {
            // TODO Auto-generated method stub
            mp.stop();
            mp.release();
            int i = 0;
            if (i  < 2) {
                i++;
                String path="http://domain.com/videos/"+i+".mp4";
                playVideo(path);
            }
            else i=0;
        }
    });
    player.start();
}

private void playVideo(String filename) {
      try {
          player.setDataSource(filename); 
          player.prepare();
          player.start();
            } catch (Exception e) { 
      // TODO Auto-generated catch block
      e.printStackTrace(); 
      } 
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.watch, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}


}

但是我甚至无法运行它，因为Eclipse告诉我＆＃34; MediaPlayer类型中的方法setOnCompletionListener（MediaPlayer.OnCompletionListener）不适用于参数（new OnCompletionListener（）{}）＆＃ 34。

造成这种情况的原因是什么？我的其余代码怎么样......它会实现我想要做的事情吗？感谢。

Answer 1

复制此行

   String path="http://domain.com/videos/"+i+".mp4";
   playVideo(path);

之后

   player = new MediaPlayer();

Answer 2

尝试播放第一个视频，并为媒体播放器设置OnCompletionListener，当第一个视频完成后，您可以回拨第二个视频，然后尝试使用新的播放器实例检查第二个视频，您从未设置第一个视频的数据源只是初始化播放器实例和设置OnCompletionListener，它从不调用becz未设置第一个视频数据源。

    private MediaPlayer player;
    private int i = 1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        playVideo("http://domain.com/videos/"+i+".mp4\"");
    }

    public void playVideo(String path){

        try{
            player = new MediaPlayer();
            player.setAudioStreamType(AudioManager.STREAM_MUSIC);
            player.setDataSource(path);
            player.prepareAsync();
            player.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                @Override
                public void onPrepared(MediaPlayer mp) {
                    mp.start();
                }
            });
            player.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
                @Override
                public void onCompletion(MediaPlayer mp) {
                    player.release();
                    player = null;
                    if(i<2){
                        playVideo("http://domain.com/videos/"+(++i)+".mp4");
                    }
                }
            });
        }catch (Exception e){
            e.printStackTrace();
        }
    }

OnCompletionListener无法正常工作

2 个答案: