问android中正在运行另一个录屏应用程序时，无法录制视频

EN

private boolean prepareVideoRecorder() {
    mCamera = Camera.open(findBackFacingCamera());
    mediaRecorder = new MediaRecorder();
    // store the quality profile required
    windowwidth = getWindowManager().getDefaultDisplay().getWidth();
    CamcorderProfile profile;
    if (windowwidth > 2000) {
        profile= CamcorderProfile.get(camid, CamcorderProfile.QUALITY_HIGH);
    } else {
        profile= CamcorderProfile.get(camid, CamcorderProfile.QUALITY_480P);
    }
    // Step 1: Unlock and set camera to MediaRecorder
    mCamera.unlock();
    mediaRecorder.setCamera(mCamera);

    // Step 2: Set sources value i.e. CAMERA,SURFACE, or DEFAULT
    mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);

    // Step 3: Set all other values contained in profile except audio settings
    mediaRecorder.setOutputFormat(profile.fileFormat);
    mediaRecorder.setVideoEncoder(profile.videoCodec);
    mediaRecorder.setVideoEncodingBitRate(profile.videoBitRate);
    mediaRecorder.setVideoFrameRate(profile.videoFrameRate);
    mediaRecorder.setVideoSize(profile.videoFrameWidth, profile.videoFrameHeight);

    // Step 4: Seting output file
   // mediaRecorder.setOutputFile(getOutputMediaFile(MEDIA_TYPE_VIDEO).toString());
    File videoStorageDir = Const.getFileDirectory(MainActivity.this);
    mediaRecorder.setOutputFile(videoStorageDir.getPath()+ File.separator + "/videofile.mp4");

    // Step 5: Set the preview output
    mediaRecorder.setPreviewDisplay(mvPreview.getHolder().getSurface());

    mediaRecorder.setMaxDuration(42000); // for 40 second (you can set video recording limit here)

    // Step 6: Prepare configured MediaRecorder
    try {
        mediaRecorder.prepare();
    } catch (IllegalStateException e) {
        releaseMediaRecorder();
        return false;
    } catch (IOException e) {
        releaseMediaRecorder();
        return false;
    }
    return true;
}