如何打开相机然后切换到图像模式（反之亦然）(How to open camera then swit

在我来说，我想拍照或拍摄视频，其实如果我创建独立的意图，我可以做这些。我的意思是，我可以打开相机的图像模式或视频模式，但它们之间不能切换。这是涉及到我使用的意图过滤器？我该怎么办？如何在两者之间切换？

我有同样的问题。我做了一个表面视图和活动相片相机，我以为把一个按钮后，记录与相同表面观点相同活动的视频，但我不知道这是否是可能的。嗯，我在写信的活动这种方法来准备去MediaRecorder并采取面视图。

    public Boolean prepararCamaraVideo(){

    mMediaRecorder = new MediaRecorder();

    mCamera.unlock();
    mMediaRecorder.setCamera(mCamera);

    mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
    mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);

    state = MediaRecorderState.INITIALIZED;

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO)
        mMediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH));
    else { 
        mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
    }

    state = MediaRecorderState.DATA_SOURCE_CONFIGURED;

    mOutputFile = Files.getExternalMediaFile(Files.MEDIA_TYPE_VIDEO).toString();
    mMediaRecorder.setOutputFile(mOutputFile);

    mMediaRecorder.setPreviewDisplay(mCameraPreview.getHolder().getSurface());

    try {
        mMediaRecorder.prepare();
    } catch (IllegalStateException e) {
        Log.d("Video", "IllegalStateException preparing MediaRecorder: " + e.getMessage());
        releaseMediaRecorder();
        return false;

    } catch (IOException e) {
        Log.d("Video", "IOException preparing MediaRecorder: " + e.getMessage());
        releaseMediaRecorder();
        return false;
    }
    return true;

}

此命令mMediaRecorder.setPreviewDisplay（mCameraPreview.getHolder（）getSurface（））; 获取摄像机的表面。

最后，该方法来记录视频。

    public void grabaVideo(View v) {
    if (state!=MediaRecorderState.RECORDING){
        if (prepararCamaraVideo()) {
            mMediaRecorder.start();
            state = MediaRecorderState.RECORDING;
            Toast.makeText(getApplicationContext(), getString(R.string.capturing_video), Toast.LENGTH_SHORT).show();                
        } else {
            // prepare didn't work, release the camera
            releaseMediaRecorder();
            // inform user
        }
    }
    else{
        mMediaRecorder.stop();  // stop the recording
        releaseMediaRecorder(); // release the MediaRecorder object
        mCamera.lock();         // take camera access back from MediaRecorder

        state = MediaRecorderState.INITIAL;
        Toast.makeText(getApplicationContext(), getString(R.string.video_stored_in) + " " + mOutputFile, Toast.LENGTH_SHORT).show();

    }

}

我希望能帮助你。