无法停止后台服务

Question

我正在开发一个应用程序，它在背景中记录视频，但是在录制过程中，当我按停止按钮停止录制时，它会抛出一个错误，说 java.lang.RuntimeException：Unable停止服务

以下是我的服务类代码： -

@Override
    public void onCreate() {
        // Start foreground service to avoid unexpected kill

        Notification notification = new Notification.Builder(this)
                .setContentTitle("Background Video Recorder")
                .setContentText("Background video recording started...")
                .setSmallIcon(R.mipmap.ic_launcher)
                .build();
        startForeground(1234, notification);
        // Create new SurfaceView, set its size to 1x1, move it to the top left corner and set this service as a callback


        windowManager = (WindowManager) this.getSystemService(Context.WINDOW_SERVICE);
        surfaceView = new SurfaceView(this);

        WindowManager.LayoutParams layoutParams = new WindowManager.LayoutParams(1, 1,
                WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
                WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
                PixelFormat.TRANSLUCENT
        );

        layoutParams.gravity = Gravity.LEFT | Gravity.TOP;
        windowManager.addView(surfaceView, layoutParams);
        surfaceView.getHolder().addCallback(this);

        pref= getApplicationContext().getSharedPreferences("Recorder",0);
        editor = pref.edit();
    }

    // Method called right after Surface created (initializing and starting MediaRecorder)
    @Override
    public void surfaceCreated(SurfaceHolder surfaceHolder) {
        camera = Camera.open();
        mediaRecorder = new MediaRecorder();
        camera.unlock();
        mediaRecorder.setPreviewDisplay(surfaceHolder.getSurface());
        mediaRecorder.setCamera(camera);
        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
        mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
        mediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH));
        String file = Environment.getExternalStorageDirectory()+"/:"+DateFormat.format("yyyy-MM-dd_kk-mm-ss", new Date().getTime())+".mp4";
        mediaRecorder.setOutputFile(Environment.getExternalStorageDirectory()+"/:"+DateFormat.format("yyyy-MM-dd_kk-mm-ss", new Date().getTime())+".mp4");

        editor.putString("file_path",file);
        editor.commit();

        try {
            mediaRecorder.prepare();
            mediaRecorder.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
@Override
    public void onDestroy() {
        mediaRecorder.stop();
        mediaRecorder.reset();
        mediaRecorder.release();
        camera.lock();
        camera.release();
        windowManager.removeView(surfaceView);
       }

停止按钮代码： -

public void stopVideo(View view){
        Toast.makeText(this, "Video Recording stopped", Toast.LENGTH_LONG).show();
        Intent intent = new Intent(MainActivity.this, CameraService.class);
        stopService(intent);
        Intent i  = new Intent(this, MainActivity.class);
        startActivity(i);
    }

它出了什么问题？