27.1 Intercepting Touch Events
Touch events can be intercepted by a view object through the registration of an onTouchListener event listener and the implementation of the corresponding onTouch() callback method. The following code, for example, ensures that any touches on a ConstraintLayout view instance named myLayout result in a call to the onTouch() method:
myLayout.setOnTouchListener(
new ConstraintLayout.OnTouchListener() {
public boolean onTouch(View v, MotionEvent m) {
// Perform tasks here
return true;
&...