One of the most usable methods in android is setOnClickListener method which helps us to link a listener with certain attributes. While invoking this method a callback function will run. One can also create a class for more than one listener, so this can lead you to code reusability.

What is the use of setOnClickListener in Android?

setOnClickListener(this); means that you want to assign listener for your Button “on this instance” this instance represents OnClickListener and for this reason your class have to implement that interface. If you have more than one button click event, you can use switch case to identify which button is clicked.

How do I disable setOnClickListener on Android?

Note that if a view is non-clickable (a TextView for example), setting setOnClickListener(null) will mean the view is clickable. Use mMyView. setClickable(false) if you don’t want your view to be clickable.