Android - Fail to connect to camera

Question

I'm using the Android APIDemo sample code.

When I run the CameraPreview example, at first it was giving me an error.

I traced that one down and the sample was working for a while.
Now, it no longer works. It says

ERROR/AndroidRuntime(2949): java.lang.RuntimeException: Fail to connect to camera service   

What can be causing that? It happens when camera.open() is called.

Thanks,
Tee

Answer 1

Be sure to properly release all the aquired camera resources:

    @Override public void surfaceDestroyed(SurfaceHolder holder) {     if (mCam != null) {         mCam.stopPreview();         mCam.setPreviewCallback(null);         mCam.release();         mCam = null;     } }      @Override public void surfaceCreated(SurfaceHolder holder) {     if (mCam == null) {         mCam = Camera.open();         try {             mCam.setPreviewDisplay(holder);              // TODO test how much setPreviewCallbackWithBuffer is faster             mCam.setPreviewCallback(this);         } catch (IOException e) {             mCam.release();             mCam = null;         }     } }