Android 播放视频文件

package com.example.myvideo2;

import java.io.File;

import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.MediaController;
import android.widget.MediaController.MediaPlayerControl;
import android.widget.VideoView;
/**
 * Android 播放视频
 * @Describe: 
 * @package: com.example.myvideo2
 * @author shaobn
 * @date 2015-9-14 上午10:57:41
 */
public class MainActivity extends Activity implements MediaPlayerControl {
    private VideoView videoView;
    private MediaController mediaController;
    private Button button;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mediaController = new MediaController(MainActivity.this);
        videoView = (VideoView) this.findViewById(R.id.videoView1);
        button = (Button) this.findViewById(R.id.button1);
        videoView.setMediaController(mediaController);
        button.setOnClickListener(new View.OnClickListener() {
            
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
                    File file1 = Environment.getExternalStorageDirectory();
                    File file2 = new File(file1,"/Movies/Video.mp4");
                    Uri uri = Uri.fromFile(file2);
                    videoView.setVideoURI(uri);
                }
            }
        });
        
    }
    @Override
    public boolean canPause() {
        // TODO Auto-generated method stub
        return videoView.canPause();
    }
    @Override
    public boolean canSeekBackward() {
        // TODO Auto-generated method stub
        return videoView.canSeekBackward();
    }
    @Override
    public boolean canSeekForward() {
        // TODO Auto-generated method stub
        return videoView.canSeekForward();
    }
    @Override
    public int getAudioSessionId() {
        // TODO Auto-generated method stub
        return 0;
    }
    @Override
    public int getBufferPercentage() {
        // TODO Auto-generated method stub
        return 0;
    }
    @Override
    public int getCurrentPosition() {
        // TODO Auto-generated method stub
        return 0;
    }
    @Override
    public int getDuration() {
        // TODO Auto-generated method stub
        return 0;
    }
    @Override
    public boolean isPlaying() {
        // TODO Auto-generated method stub
        return videoView.isPlaying();
    }
    @Override
    public void pause() {
        // TODO Auto-generated method stub
        if (videoView.isPlaying()) {
            videoView.pause();
        }
    }
    @Override
    public void seekTo(int arg0) {
        // TODO Auto-generated method stub
        videoView.seekTo(arg0);
    }
    @Override
    public void start() {
        // TODO Auto-generated method stub
        videoView.start();
    }
    
    
}

实现播放视频文件。