How to Stop Handler thread?

I want to stop this thread on button click.

TIME_OUT = 45000;
new Handler().postDelayed(new Runnable() {
       @Override
       public void run() {
         Intent i = new 
         Intent(MapsActivity.this,MapsActivity.class);
         startActivity(i);
         finish();
       }
     }, TIME_OUT);

I am using above handler in onCreate of an Activity. I want to stop it. How to stop this thread on click of any button or on click of on Back Pressed?

Handler handler = new Handler();
Runnable runnable = new Runnable() {
    @Override
    public void run() {
        Intent i = new
                Intent(MapsActivity.this,MapsActivity.class);
        startActivity(i);
        finish();
    }
};
handler.post(runnable);

// use this when you don't want callback to be called anymore
handler.removeCallbacks(runnable);