在三星中捕获视频时应用程序崩溃

Question

我正在尝试使用表面视图捕获视频，它运行良好，但是当我在三星设备中测试时，应用程序崩溃了，当我错了？任何帮助表示赞赏！

这是我的错误日志

E/AndroidRuntime: FATAL EXCEPTION: main
                                                                                            java.lang.RuntimeException: Fail to connect to camera service
                                                                                                at android.hardware.Camera.native_setup(Native Method)
                                                                                                at android.hardware.Camera.<init>(Camera.java:413)
                                                                                                at android.hardware.Camera.open(Camera.java:366)
                                                                                                at com.example.android.videorecordthumbnaildemo.MainActivity.initRecorder(MainActivity.java:76)
                                                                                                at com.example.android.videorecordthumbnaildemo.MainActivity.surfaceCreated(MainActivity.java:125)
                                                                                                at android.view.SurfaceView.updateWindow(SurfaceView.java:610)
                                                                                                at android.view.SurfaceView.access$000(SurfaceView.java:93)
                                                                                                at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:182)
                                                                                                at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:864)
                                                                                                at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2142)
                                                                                                at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1249)
                                                                                                at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6364)
                                                                                                at android.view.Choreographer$CallbackRecord.run(Choreographer.java:791)
                                                                                                at android.view.Choreographer.doCallbacks(Choreographer.java:591)
                                                                                                at android.view.Choreographer.doFrame(Choreographer.java:561)
                                                                                                at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:777)
                                                                                                at android.os.Handler.handleCallback(Handler.java:730)
                                                                                                at android.os.Handler.dispatchMessage(Handler.java:92)
                                                                                                at android.os.Looper.loop(Looper.java:176)
                                                                                                at android.app.ActivityThread.main(ActivityThread.java:5419)
                                                                                                at java.lang.reflect.Method.invokeNative(Native Method)
                                                                                                at java.lang.reflect.Method.invoke(Method.java:525)
                                                                                                at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
                                                                                                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
                                                                                                at dalvik.system.NativeStart.main(Native Method

MainActivity.java

class MainActivity extends Activity implements SurfaceHolder.Callback {
    //    private final String VIDEO_PATH_NAME = "/mnt/sdcard/VGA_30fps_512vbrate.mp4";
    private final String VIDEO_PATH_NAME = "/mnt/sdcard/VGA_30fps_512vbrate.mp4";
//    private final String VIDEO_PATH_NAME = Environment.getExternalStorageState() + "/VGA_30fps_512vbrate.mp4";

    private MediaRecorder mMediaRecorder;
    private Camera mCamera = null;
    private SurfaceView mSurfaceView;
    private SurfaceHolder mHolder;
    private View mToggleButton;
    private boolean mInitSuccesful;
    private Button btnPlayVideo;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

//        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

        mSurfaceView = (SurfaceView) findViewById(R.id.surfaceView);

        mHolder = mSurfaceView.getHolder();
        mHolder.addCallback(this);
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        mToggleButton = (ToggleButton) findViewById(R.id.toggleRecordingButton);
        mToggleButton.setOnClickListener(new View.OnClickListener() {
            @Override
            // toggle video recording
            public void onClick(View v) {
                if (((ToggleButton) v).isChecked()) {
                    try {
                        mMediaRecorder.start();
                        Thread.sleep(10 * 1000);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                    finish();
                } else {
                    mMediaRecorder.stop();
                    mMediaRecorder.reset();
                    try {
                        initRecorder(mHolder.getSurface());
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
        });
    }

    /* Init the MediaRecorder, the order the methods are called is vital to
     * its correct functioning */
    private void initRecorder(Surface surface) throws IOException {
        // It is very important to unlock the camera before doing setCamera
        // or it will results in a black preview
        if (mCamera == null) {
            try {
                mCamera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);
                mCamera.setDisplayOrientation(90);
                mCamera.unlock();
            } catch (IllegalStateException e) {
                // This is thrown if the previous calls are not called with the
                // proper order
                e.printStackTrace();
            }
        }

        if (mMediaRecorder == null) mMediaRecorder = new MediaRecorder();
        mMediaRecorder.setPreviewDisplay(surface);
        mMediaRecorder.setCamera(mCamera);

        mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
        //       mMediaRecorder.setOutputFormat(8);
        mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);

        mMediaRecorder.setVideoEncodingBitRate(3000000);
        mMediaRecorder.setOrientationHint(90);
      mMediaRecorder.setVideoFrameRate(CamcorderProfile.QUALITY_HIGH_SPEED_LOW);

//        mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

//        mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mMediaRecorder.setVideoFrameRate(24);
        mMediaRecorder.setVideoSize(720, 480);

        mMediaRecorder.setOutputFile(VIDEO_PATH_NAME);

        try {
            mMediaRecorder.prepare();
        } catch (IllegalStateException e) {
            // This is thrown if the previous calls are not called with the
            // proper order
            e.printStackTrace();
        }
        mInitSuccesful = true;
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        try {
            if (!mInitSuccesful)
                initRecorder(mHolder.getSurface());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        shutdown();
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
    }

    private void shutdown() {
        // Release MediaRecorder and especially the Camera as it's a shared
        // object that can be used by other applications
        mMediaRecorder.reset();
        mMediaRecorder.release();
        mCamera.release();

        // once the objects have been released they can't be reused
        mMediaRecorder = null;
        mCamera = null;
        mCamera.stopPreview();
        mCamera.setPreviewCallback(null);
    }
}

Answer 1

复制自 Android 开发者网站：

CAMERA                                                                          Added in API level 1

String CAMERA

Required to be able to access the camera device.

This will automatically enforce the } manifest element for all camera features. If you do not require all camera features or can properly operate if a camera is not available, then you must modify your manifest as appropriate in order to install on devices that don't support all camera features.

Protection level: dangerous

Constant Value: "android.permission.CAMERA" 

保护级别危险意味着您必须请求许可。它崩溃的原因是因为手机使用的是Android 6，这意味着应用程序必须请求许可

把它放在 onCreate 中：

    if (Build.VERSION.SDK_INT == Build.VERSION_CODES.M ) {
        checkPermission();
    }

和这个在同一个班级：

private void checkPermission() {

        if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED ){//Can add more as per requirement

            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.CAMERA},
                    123);

        }


    }