Bits of android

gistfile1.java

    /**
     * remeasures view with the same width and returns it's height, the view has to be laid out before calling this
     * @param view the view
     * @return measured height
     */
    public static int measureViewHeight(View view){
        view.measure(
                View.MeasureSpec.makeMeasureSpec(view.getWidth(), View.MeasureSpec.EXACTLY),
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED)
        );
        return view.getMeasuredHeight();
    }
    
    private Rect getViewBounds(View bounds){
        Rect ret = new Rect();
        int[] location = new int[2];
        bounds.getLocationInWindow(location);
        ret.set(location[0], location[1], location[0] + bounds.getWidth(), location[1] + bounds.getHeight());
        return ret;
    }
    
    /**
     * Finds the scroll position for this recycler
     * @param view obvious
     * @return index of the first visible item
     */
    public static int getScrollPosition(RecyclerView view){
        View childAt = view.getLayoutManager().getChildAt(0);
        if(childAt != null){
            return view.getLayoutManager().getPosition(childAt);
        }else{
            return 0;
        }
    }
    
    //scroll toolbar with recyclerview
    list.setOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                float translation = toolbar.getTranslationY();
                translation -= dy;
                if(translation > 0)
                    translation = 0.0f;
                else if(translation < -toolbar.getHeight())
                    translation = -toolbar.getHeight();
                toolbar.setTranslationY(translation);
            }
        });