mediaRecorder.reset();
  mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); //从照相机采集视频
  mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
  mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
  mediaRecorder.setVideoFrameRate(3); //每秒3帧
  mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263); //设置视频编码方式
  mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
  File videoFile = new File(Environment.getExternalStorageDirectory(), System.currentTimeMillis()+".3gp");
  mediaRecorder.setOutputFile(videoFile.getAbsolutePath());
  mediaRecorder.setPreviewDisplay(surfaceView.getHolder().getSurface());
  mediaRecorder.prepare();//预期准备
  mediaRecorder.start();//开始刻录
  mediaRecorder.stop();//停止刻录

public class MediaRecorderActivity extends AppCompatActivity {

  private SurfaceView sv_mediarecorder_surface;
  private MediaRecorder mediaRecorder;
  private boolean isStartAndStop=false;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
      getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
      getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
    }
    setContentView(R.layout.activity_mediarecorder);
    //获取SurfaceView
    sv_mediarecorder_surface = (SurfaceView) findViewById(R.id.sv_mediarecorder_surface);
    //实例化媒体录制器
    mediaRecorder = new MediaRecorder();

  }
  //视频录制与暂停的方法
  public void startMediaCorder(View view){
    Button button= (Button) view;
    if (!isStartAndStop) {
      if (mediaRecorder==null){
        //实例化媒体录制器
        mediaRecorder = new MediaRecorder();
      }
      mediaRecorder.reset();
      mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); //从照相机采集视频
      mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);//设置麦克风
      //设置保存的格式
      mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
      //设置编码格式
      mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263);
      mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
      mediaRecorder.setVideoFrameRate(3);
      //获取根路径
      String sdPath= Environment.getExternalStorageDirectory().getAbsolutePath();
      //设置保存的路径
      mediaRecorder.setOutputFile(sdPath+"/taoge"+System.currentTimeMillis()+".mp4");
      //将画面展示到SurfaceView
      mediaRecorder.setPreviewDisplay(sv_mediarecorder_surface.getHolder().getSurface());
      //准备
      try {
        mediaRecorder.prepare();
        mediaRecorder.start();

      } catch (IOException e) {
        e.printStackTrace();
      }
      button.setText("结束");
    }else{

      // 为其它应用释放摄像头
      mediaRecorder.release();
      mediaRecorder = null;
      //关闭
      button.setText("开始");
    }
    isStartAndStop=!isStartAndStop;
  }


}