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//Declare these in your Activity:

Handler handler = new Handler();
Runnable timedTask = new Runnable(){

    @Override
    public void run() {
        getUrlText();
        handler.postDelayed(timedTask, 1000);
    }};
//Then set your onClick:

button.setOnClickListener(new OnClickListener() {

    @Override
        public void onClick(View v) {
            getUrlText();
            handler.post(timedTask);
        }
    });
//This will execute timedTask every 1000 milliseconds. Increase this number as necessary.