setOnClickListener - How to Create a Click Handler for a Button, all within onCreate method

setOnClickListener was added in API Level 1
Register a callback to be invoked when this view is clicked. If this view is not clickable, it becomes clickable.
Parameters: the callback that will run

1. Find a button using ID and name it myButton.

2. In the imports section, add the below imports.

import android.view.View.OnClickListener;
import android.view.View;

3. In the MainActivity.java file, in the onCreate method, add the following code.

myButton.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {
        //add toast here for testing if you like.
    }
});

4. Compile and run!

Next Recommended Article: setOnClickListener - Create a Click Handler for a Button, using a method

Resources:
http://developer.android.com/reference/android/widget/Button.html
http://developer.android.com/reference/android/view/View.html#setOnClickListener(android.view.View.OnClickListener)

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