1/* 2* Copyright (C) 2016 The Android Open Source Project 3* 4* Licensed under the Apache License, Version 2.0 (the "License"); 5* you may not use this file except in compliance with the License. 6* You may obtain a copy of the License at 7* 8* http://www.apache.org/licenses/LICENSE-2.0 9* 10* Unless required by applicable law or agreed to in writing, software 11* distributed under the License is distributed on an "AS IS" BASIS, 12* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13* See the License for the specific language governing permissions and 14* limitations under the License. 15*/ 16 17package android.view; 18 19import com.android.frameworks.coretests.R; 20 21import android.app.Activity; 22import android.os.Bundle; 23import android.util.Log; 24import android.util.TypedValue; 25import android.view.MotionEvent; 26import android.view.ScaleGestureDetector; 27import android.view.ScaleGestureDetector.SimpleOnScaleGestureListener; 28import android.widget.TextView; 29 30public class ScaleGesture extends Activity { 31 private ScaleGestureDetector mScaleGestureDetector; 32 private float mFactor; 33 @Override 34 protected void onCreate(Bundle savedInstanceState) { 35 super.onCreate(savedInstanceState); 36 setContentView(R.layout.scale_gesture); 37 mScaleGestureDetector = new ScaleGestureDetector(this, new OnScaleGestureListener()); 38 mFactor = 1.0f; 39 } 40 41 public float getScaleFactor() { 42 return mFactor; 43 } 44 45 @Override 46 public boolean onTouchEvent(MotionEvent event) { 47 mScaleGestureDetector.onTouchEvent(event); 48 return true; 49 } 50 51 public class OnScaleGestureListener extends SimpleOnScaleGestureListener { 52 @Override 53 public boolean onScale(ScaleGestureDetector detector) { 54 mFactor *= detector.getScaleFactor(); 55 return true; 56 } 57 } 58} 59