Android：音视频刻录

<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

public class MainActivity extends Activity {
private SurfaceView surfaceView;
private RelativeLayout layout;
private Button recordbutton;
private Button stopbutton;
private MediaRecorder mediaRecorder;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);

surfaceView = (SurfaceView) this.findViewById(R.id.surfaceView);
surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
surfaceView.getHolder().setFixedSize(176, 144);
surfaceView.getHolder().setKeepScreenOn(true);

layout = (RelativeLayout) this.findViewById(R.id.layout);
recordbutton = (Button) this.findViewById(R.id.recordbutton);
stopbutton = (Button) this.findViewById(R.id.stopbutton);
}

@Override
public boolean onTouchEvent(MotionEvent event) {
if(event.getAction() == MotionEvent.ACTION_DOWN){
layout.setVisibility(ViewGroup.VISIBLE);
}
return super.onTouchEvent(event);
}

public void record(View v){
switch (v.getId()) {
case R.id.recordbutton:
try{
File videoFile = new File(Environment.getExternalStorageDirectory(), System.currentTimeMillis()+ ".3gp");
mediaRecorder = new MediaRecorder();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mediaRecorder.setVideoSize(320, 240);
mediaRecorder.setVideoFrameRate(5);
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
mediaRecorder.setOutputFile(videoFile.getAbsolutePath());
mediaRecorder.setPreviewDisplay(surfaceView.getHolder().getSurface());
mediaRecorder.prepare();
mediaRecorder.start();
}catch (Exception e) {
e.printStackTrace();
}
recordbutton.setEnabled(false);
stopbutton.setEnabled(true);
break;

case R.id.stopbutton:
if(mediaRecorder!=null){
mediaRecorder.stop();
mediaRecorder.release();
mediaRecorder = null;
}
recordbutton.setEnabled(true);
stopbutton.setEnabled(false);
break;
}
}
}

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