Android basics: running code in the UI thread

Question

In the viewpoint of running code in the UI thread, is there any difference between:

MainActivity.this.runOnUiThread(new Runnable() {
    public void run() {
         


        

Answer 1

There is a fourth way using Handler

new Handler().post(new Runnable() {
    @Override
    public void run() {
        // Code here will run in UI thread
    }
});