How do we use runOnUiThread in Android?

Question

I\'m new to Android and I\'m trying to use the UI-Thread, so I\'ve written a simple test activity. But I think I\'ve misunderstood something, because on clicking the button

Answer 1

If using in fragment then simply write

getActivity().runOnUiThread(new Runnable() {
    @Override
    public void run() {
        // Do something on UiThread
    }
});