android: I get no stacktrace, phone just hangs

Question

My phone crashes after i pause my camera app, then switching back and take a picture. This only happens on my Samsung Galaxy S, on my Huwai device it totally works. I have f

Answer 1

I finally (after hours, almost days of debugging) solved this, by removing the preview view and re-instantiating it:

    @Override
    protected void onResume() {
        super.onResume();
        mSurfaceViewContainer.removeAllViews();
        mSurfaceView = new SurfaceView(mSurfaceViewContainer.getContext());
        mSurfaceViewContainer.addView(mSurfaceView, new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));

        SurfaceHolder previewHolder = mSurfaceView.getHolder();
        previewHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        previewHolder.addCallback(mSurfaceHolderCallback);
    }

Answer 2

There is an IOException thrown (Could not find method java.io.IOException.<init>), however the IOException constructor used was introduced in API level 9, so it doesn't exist on the Galaxy S and it shows a strange log instead.

About your problem, I would suggest trying to call lock() before release() :

camera.stopPreview();
camera.lock();
camera.release();
this.camera = null;

I don't know if this will work but in this source code, I found a comment which says :

// If we don't lock the camera, release() will fail.
camera.lock();
camera.release();

It seems clearly related.