<?xml version="1.0" encoding="utf-8"?> 
 
 
   
     
     
     
   
   
 
 

public class MainActivity extends AppCompatActivity implements View.OnClickListener { 
  private VideoView videoView; 
 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    videoView = (VideoView) findViewById(R.id.video_view); 
    Button play = (Button) findViewById(R.id.play); 
    Button pause = (Button) findViewById(R.id.pause); 
    Button replay = (Button) findViewById(R.id.replay); 
 
    play.setOnClickListener(this); 
    pause.setOnClickListener(this); 
    replay.setOnClickListener(this); 
    if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { 
      ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1); 
    } else { 
      initVideoPath(); 
    } 
  } 
 
  private void initVideoPath() { 
    File file = new File(Environment.getExternalStorageDirectory(), "movie.mp4"); 
    videoView.setVideoPath(file.getPath());//指定视频文件的路径 
  } 
 
  @Override 
  public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { 
 
    switch (requestCode) { 
      case 1: 
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
          initVideoPath(); 
        } else { 
          Toast.makeText(this, "拒绝权限将无法使用程序", Toast.LENGTH_SHORT).show(); 
          finish(); 
        } 
        break; 
      default: 
 
    } 
  } 
 
  @Override 
  public void onClick(View v) { 
    switch (v.getId()) { 
      case R.id.play: 
        if (!videoView.isPlaying()) { 
          videoView.start();//开始播放 
        } 
        break; 
      case R.id.pause: 
        if (!videoView.isPlaying()) { 
          videoView.pause();//暂停播放 
        } 
        break; 
      case R.id.replay: 
        if (!videoView.isPlaying()) { 
          videoView.resume();//重新播放 
        } 
        break; 
    } 
 
  } 
 
  @Override 
  protected void onDestroy() { 
    super.onDestroy(); 
    if (videoView != null) { 
      videoView.suspend();//将VideoView所占用的资源释放掉 
    } 
  } 
}