我是一名有用的助手,可以为您进行文本翻译。
我有一个服务,并且我试图让这个服务将视频录制到文件中。
启动该服务的活动:
public static SurfaceView mSurfaceView;
public static SurfaceHolder mSurfaceHolder;
public static Camera mCamera;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mSurfaceView = (SurfaceView) findViewById(R.id.surfaceView1);
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mSurfaceHolder.addCallback(this);
Intent intent = new Intent(MainActivity.this, RecordService.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startService(intent);
finish();
}
该服务:
private MediaRecorder mMediaRecorder;
private SurfaceView mSurfaceView;
private SurfaceHolder mSurfaceHolder;
private boolean mRecordingStatus;
private Camera mServiceCamera;
private Size mPreviewSize;
@Override
public void onCreate()
{
mRecordingStatus = false;
mSurfaceView = MainActivity.mSurfaceView;
mSurfaceHolder = MainActivity.mSurfaceHolder;
mServiceCamera=MainActivity.mCamera;
InitCamera();
super.onCreate();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
super.onStartCommand(intent, flags, startId);
if (!mRecordingStatus)
StartRecord();
else
StopRecord();
return START_STICKY;
}
private void InitCamera()
{
mServiceCamera = Camera.open();
Camera.Parameters p = mServiceCamera.getParameters();
final List<Size> listSize = p.getSupportedPreviewSizes();
mPreviewSize = listSize.get(2);
p.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
p.setPreviewFormat(PixelFormat.YCbCr_420_SP);
mServiceCamera.setParameters(p);
try
{
mServiceCamera.setPreviewDisplay(mSurfaceHolder);
mServiceCamera.startPreview();
}
catch (IOException e)
{
e.printStackTrace();
}
mServiceCamera.unlock();
}
private void StartRecord()
{
try
{
mMediaRecorder = new MediaRecorder();
mMediaRecorder.setCamera(mServiceCamera);
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
mMediaRecorder.setOutputFile(Environment.getExternalStorageDirectory().getPath()+File.separator+ "video.mp4");
mMediaRecorder.setVideoFrameRate(30);
mMediaRecorder.setVideoSize(mPreviewSize.width, mPreviewSize.height);
mMediaRecorder.setPreviewDisplay(mSurfaceHolder.getSurface());
mMediaRecorder.prepare();
mMediaRecorder.start();
mRecordingStatus = true;
Toast toast = Toast.makeText(getBaseContext(), "Recording",1000);
toast.show();
}
catch (IOException e)
{
Toast toast = Toast.makeText(getBaseContext(), e.getMessage(),2000);
toast.show();
}
}
当我在我的Galaxy s上调试代码时,我会在StartRecord()方法中收到一个名为“invalid preview surface”的toast提示。
如何解决这个问题呢?