Question

Here is my surface-changed event handling code:

    public void surfaceChanged(SurfaceHolder holder,
                               int format, int width,
                               int height) {
    Camera.Parameters parameters = camera.getParameters();
    Camera.Size size = getBestPreviewSize(width, height,
                parameters);
       //...
    }


    private Camera.Size getBestPreviewSize(int width, int height,
                                       Camera.Parameters parameters) {
        Camera.Size result = null;

        // it fails with NullPointerExceptiopn here,
        // when accessing "getSupportedPreviewSizes" method:
        // that means "parameters" is null
        for (Camera.Size size : parameters.getSupportedPreviewSizes()) {
            ///...
        }
    }

I initialize camera like this:

    @Override
    public void onResume() {
        super.onResume();
        camera = Camera.open();
    }

This problem doesn’t occur on my Galaxy S Plus neither it happen on LG Optimus Black phone. Has anyone thoughts what’s wrong here?

Answer 1

I’ve solved this.

parameters.getSupportedPreviewSizes()

Returns NULL on Galaxy Tab. So I just make a check if it is null and don’t set new preview size in such case. To this conclusion I’ve came after looking into standard Camera application sources.