Java tutorial
/* * Copyright 2016 Anand Muralidhar * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.anandmuralidhar.simplearandroid; import android.app.Activity; import android.support.v4.view.GestureDetectorCompat; import android.view.GestureDetector; import android.view.MotionEvent; public class GestureClass { GestureDetectorCompat mTapDetector; private native void DoubleTapNative(); public GestureClass(Activity activity) { // instantiate listener for detecting double-tap mTapDetector = new GestureDetectorCompat(activity, new MyTapListener()); } // this class detects double-tap gesture class MyTapListener extends GestureDetector.SimpleOnGestureListener { public boolean onDoubleTap(MotionEvent event) { DoubleTapNative(); return true; } } }