on click button android code example

Example 1: button listener android

public class MyActivity extends Activity {

     protected void onCreate(Bundle icicle) {
         super.onCreate(icicle);
         setContentView(R.layout.my_layout_id);

         final Button button = (Button) findViewById(R.id.my_cool_button);
         button.setOnClickListener(new View.OnClickListener() {
             public void onClick(View v) {
                 // your handler code here
             }
         });
     }

}

Example 2: android onlcik java

Button button = (Button) findViewById(R.id.button_send);
button.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {
        // Do something in response to button click
    }
});
//https://developer.android.com/guide/topics/ui/controls/button

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Java Example