Android: Is it possible to call a method directly from setOnClickListener()?

Question

I am dynamically creating some buttons and ideally would like to be able to have a method run if the button is pressed.

Is something like the following even possible?

private void someMethod(int ID){
 //on button pressed do something with the ID
}

private void otherMethod(){

  for( Program element : someList)
  {
    addButton.setOnClickListener(someMethod(element.getID));
  }
}

Obviously thats just a mock up of some code to illustrate my question. I know you can instantiate a new class so it seems like you should be able to call a method although so far I just keep getting errors with my attempts.

I have had a look around the web but can't find anything to answer this, so thought I would ask here.

Answer 1

setOnClickListener defines what will happen when the button is clicked. Setting it multiple times for the same button is meaningless; the last one you set will be the active one.

To call a method within a listener, declare an anonymous class override:

addButton.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
           someMethod(...);
        }
});

If you're trying to set up multiple buttons with similar functionality, you need to loop through the buttons (in a list, say), and set each of their OnClickListeners. To achieve a differing variable per button, you could use the View's tag:

for (Button b : buttons) {
    b.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
             someMethod(v.getTag());
        }
    });
}

Now you can simply set the Button's tag property in the XML (or manually) to whatever you wish and it will get passed into the listener (and thus the method).