Android mediarecorder停止失败

Question

我遇到了一个非常奇怪的行为:有时我的mediarecorder崩溃了一个错误"停止失败",有时它工作正常.是我的错还是系统的错误？我不知道出了什么问题.

private void stopRecording(){
        ticker.cancel();
        ticker.purge();

        recorder.stop();

        startBtn.setText("Start");
        recordInProcess = false;

        markList = locWriteTask.getMarkArray();

    mCamera.lock();
        recorder.release();
    }

 private void startRecording(){

         startBtn.setText("Stop");

         recordInProcess = true;

             recorder = new MediaRecorder();

         mCamera.unlock();
         recorder.setCamera(mCamera);

         recorder.setPreviewDisplay(mSurfaceHolder.getSurface());
         recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
         recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
         recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
         recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
         recorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
         recorder.setMaxDuration((int) 10000000); 
         recorder.setVideoSize(320, 240); 
         recorder.setVideoFrameRate(15); 
         recorder.setOutputFile(FULL_PATH_TO_LOCAL_FILE + counter + MP4);

         try{
             recorder.prepare();
         } catch (Exception e){
             finish();
         }

         lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, ll);

         ticker = new Timer();
         locWriteTask = new WriteTimeLocationTimerTask(ll);
         ticker.schedule(locWriteTask, 0, DELAY);   

         recorder.start();
    }

Answer 1

您可以在MediaRecorder.stop()方法中捕获RuntimeException.

例:

MediaRecorder mRecorder = new MediaRecorder();
File mFile = new File("The output file's absolutePath");

... //config the mRecorder
mRecorder.setOutputFile(mFile.getAbsolutePath());

... //prepare() ...
mRecorder.start();

try {
    mRecorder.stop();
} catch(RuntimeException e) {
    mFile.delete();  //you must delete the outputfile when the recorder stop failed.
} finally {
    mRecorder.release();
    mRecorder = null;
}

Answer 2

如果录音机未处于录音状态，则停止可能会失败。

请参阅 http://developer.android.com/reference/android/media/MediaRecorder.html