How to use buttons in Android code

This is how I used to code for buttons.

onCreate() {



..
View silentButton = findViewById(R.id.silent_button);
        silentButton.setOnClickListener(this);
....
}


public void onClick(View view) {
				
		switch (view.getId()) {
		case R.id.silent_button:
			mAudio.setRingerMode(AudioManager.RINGER_MODE_SILENT);
			break;
			
		case R.id.normal_button:
			mAudio.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
			break;		


		}

And this is how one should code

However, instead of applying an OnClickListener to the button in your activity, you can assign a method to your button in the XML layout, using the android:onClick attribute. For example:

 

   android:layout_height="wrap_content"

   android:layout_width="wrap_content"

   android:text="@string/self_destruct"

   android:onClick="selfDestruct" />

Now, when a user clicks the button, the Android system calls the activity's selfDestruct(View) method. In order for this to work, the method must be public and accept a View as its only parameter. For example:

 public void selfDestruct(View view) {

   // Kabloey

}

The View passed into the method is a reference to the widget that was clicked.

I knew this because I have started working on Catroid. Thanks

 public void onCreate(Bundle savedInstanceState) {

       super.onCreate(savedInstanceState);

       setContentView(R.layout.main);