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 17 package android.view; 18 19 import com.android.frameworks.coretests.R; 20 21 import android.app.Activity; 22 import android.os.Bundle; 23 import android.util.Log; 24 import android.util.TypedValue; 25 import android.view.MotionEvent; 26 import android.view.ScaleGestureDetector; 27 import android.view.ScaleGestureDetector.SimpleOnScaleGestureListener; 28 import android.widget.TextView; 29 30 public 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
