Android - Remove Binding helper - When you want to finish Activity w/o leaks

UnbindingHelper

public static class UnbindingHelper {

    /**
     * Removes the reference to the activity from every view in a view hierarchy (listeners,
     * images etc.).
     * This method should be called in the onDestroy() method of each activity
     *
     * @param viewID normally the id of the root layout
     *               <p/>
     *               see http://code.google.com/p/android/issues/detail?id=8488
     */
    @SuppressWarnings("SameParameterValue")
    public static void unbindReferences(Activity activity, int viewID) {
        try {
            View view = activity.findViewById(viewID);
            if (view != null) {
                unbindViewReferences(view);
                if (view instanceof ViewGroup) {
                    unbindViewGroupReferences((ViewGroup) view);
                }
            }
            System.gc();
        } catch (Throwable e) {
            // whatever exception is thrown just ignore it because a crash is always worse
            // than this method not doing what it's supposed to do
        }
    }

    @SuppressWarnings("EmptyCatchBlock") // If this fails, it's ok, it's a (very) nice to have, that's all
    private static void unbindViewGroupReferences(ViewGroup viewGroup) {
        for (int i = 0; i < viewGroup.getChildCount(); i++) {
            View view = viewGroup.getChildAt(i);
            unbindViewReferences(view);
            if (view instanceof ViewGroup) {
                unbindViewGroupReferences((ViewGroup) view);
            }
        }
        try {
            viewGroup.removeAllViews();
        } catch (Throwable mayHappen) {
            // AdapterViews, ListViews and potentially other ViewGroups don't support the
            // removeAllViews operation
        }
    }

    @SuppressWarnings({"EmptyCatchBlock", "deprecation"})
    // If this fails, it's ok, it's a (very) nice to have, that's all
    private static void unbindViewReferences(View view) {
        // set all listeners to null (not every view and not every API level supports the
        // methods)
        try {
            view.setOnClickListener(null);
        } catch (Throwable mayHappen) {
        }

        try {
            view.setOnCreateContextMenuListener(null);
        } catch (Throwable mayHappen) {
        }

        try {
            view.setOnFocusChangeListener(null);
        } catch (Throwable mayHappen) {
        }
        try {
            view.setOnKeyListener(null);
        } catch (Throwable mayHappen) {
        }
        try {
            view.setOnLongClickListener(null);
        } catch (Throwable mayHappen) {
        }
        try {
            view.setOnClickListener(null);
        } catch (Throwable mayHappen) {
        }

        // set background to null
        Drawable d = view.getBackground();
        if (d != null) {
            d.setCallback(null);
        }
        if (view instanceof ImageView) {
            ImageView imageView = (ImageView) view;
            d = imageView.getDrawable();
            if (d != null) {
                d.setCallback(null);
            }
            imageView.setImageDrawable(null);
            imageView.setBackgroundDrawable(null);
            imageView.setImageBitmap(null);
        }

        // destroy webview
        if (view instanceof WebView) {
            view.destroyDrawingCache();
            ((WebView) view).destroy();
        }
    }
}