CounterButton.java

package com.iwan.random;

import android.content.Context;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.widget.Button;

/*
* Source: http://www.rochdev.com/2011/05/update-ui-when-holding-button.html
* Modification:
*     On cancelling long press, instead of reference to parent activity,
*     call the OnCancelLongpressListener listener
*/

public interface OnCancelLongpressListener {
	void onCancelLongpress(View v);
}
public class CounterButton extends Button {

	public CounterButton(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
	}

	public CounterButton(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	public CounterButton(Context context) {
		super(context);
	}
	
	OnCancelLongpressListener onCancelLongpressListener;
	public void setOnCancelLongpressListener(OnCancelLongpressListener listener) {
		onCancelLongpressListener = listener;
	}
	
	private void cancelLongpressIfRequired(MotionEvent event) {
		if ((event.getAction() == MotionEvent.ACTION_CANCEL)
 			|| (event.getAction() == MotionEvent.ACTION_UP)) {
			onCancelLongpressListener.onCancelLongpress(this);
		}
	}
	
	@Override
	public boolean onTouchEvent(MotionEvent event) {
		cancelLongpressIfRequired(event);
		return super.onTouchEvent(event);
	}
	
	@Override
	public boolean onTrackballEvent(MotionEvent event) {
		cancelLongpressIfRequired(event);
		return super.onTrackballEvent(event);
	}

	@Override
	public boolean onKeyUp(int keyCode, KeyEvent event) {
		if ((keyCode == KeyEvent.KEYCODE_DPAD_CENTER)
		|| (keyCode == KeyEvent.KEYCODE_ENTER)) {
			onCancelLongpressListener.onCancelLongpress(this);
		}
		return super.onKeyUp(keyCode, event);
	}
}