1 /* 2 * Copyright (C) 2012 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 com.android.launcher3; 18 19 import android.animation.Animator; 20 import android.animation.AnimatorSet; 21 import android.animation.ObjectAnimator; 22 import android.animation.PropertyValuesHolder; 23 import android.animation.ValueAnimator; 24 import android.view.View; 25 import android.view.ViewTreeObserver; 26 27 import java.util.HashSet; 28 import java.util.WeakHashMap; 29 30 public class LauncherAnimUtils { 31 static WeakHashMap<Animator, Object> sAnimators = new WeakHashMap<Animator, Object>(); 32 static Animator.AnimatorListener sEndAnimListener = new Animator.AnimatorListener() { 33 public void onAnimationStart(Animator animation) { 34 sAnimators.put(animation, null); 35 } 36 37 public void onAnimationRepeat(Animator animation) { 38 } 39 40 public void onAnimationEnd(Animator animation) { 41 sAnimators.remove(animation); 42 } 43 44 public void onAnimationCancel(Animator animation) { 45 sAnimators.remove(animation); 46 } 47 }; 48 cancelOnDestroyActivity(Animator a)49 public static void cancelOnDestroyActivity(Animator a) { 50 a.addListener(sEndAnimListener); 51 } 52 53 // Helper method. Assumes a draw is pending, and that if the animation's duration is 0 54 // it should be cancelled startAnimationAfterNextDraw(final Animator animator, final View view)55 public static void startAnimationAfterNextDraw(final Animator animator, final View view) { 56 view.getViewTreeObserver().addOnDrawListener(new ViewTreeObserver.OnDrawListener() { 57 private boolean mStarted = false; 58 public void onDraw() { 59 if (mStarted) return; 60 mStarted = true; 61 // Use this as a signal that the animation was cancelled 62 if (animator.getDuration() == 0) { 63 return; 64 } 65 animator.start(); 66 67 final ViewTreeObserver.OnDrawListener listener = this; 68 view.post(new Runnable() { 69 public void run() { 70 view.getViewTreeObserver().removeOnDrawListener(listener); 71 } 72 }); 73 } 74 }); 75 } 76 onDestroyActivity()77 public static void onDestroyActivity() { 78 HashSet<Animator> animators = new HashSet<Animator>(sAnimators.keySet()); 79 for (Animator a : animators) { 80 if (a.isRunning()) { 81 a.cancel(); 82 } 83 sAnimators.remove(a); 84 } 85 } 86 createAnimatorSet()87 public static AnimatorSet createAnimatorSet() { 88 AnimatorSet anim = new AnimatorSet(); 89 cancelOnDestroyActivity(anim); 90 return anim; 91 } 92 ofFloat(View target, float... values)93 public static ValueAnimator ofFloat(View target, float... values) { 94 ValueAnimator anim = new ValueAnimator(); 95 anim.setFloatValues(values); 96 cancelOnDestroyActivity(anim); 97 return anim; 98 } 99 ofFloat(View target, String propertyName, float... values)100 public static ObjectAnimator ofFloat(View target, String propertyName, float... values) { 101 ObjectAnimator anim = new ObjectAnimator(); 102 anim.setTarget(target); 103 anim.setPropertyName(propertyName); 104 anim.setFloatValues(values); 105 cancelOnDestroyActivity(anim); 106 new FirstFrameAnimatorHelper(anim, target); 107 return anim; 108 } 109 ofPropertyValuesHolder(View target, PropertyValuesHolder... values)110 public static ObjectAnimator ofPropertyValuesHolder(View target, 111 PropertyValuesHolder... values) { 112 ObjectAnimator anim = new ObjectAnimator(); 113 anim.setTarget(target); 114 anim.setValues(values); 115 cancelOnDestroyActivity(anim); 116 new FirstFrameAnimatorHelper(anim, target); 117 return anim; 118 } 119 ofPropertyValuesHolder(Object target, View view, PropertyValuesHolder... values)120 public static ObjectAnimator ofPropertyValuesHolder(Object target, 121 View view, PropertyValuesHolder... values) { 122 ObjectAnimator anim = new ObjectAnimator(); 123 anim.setTarget(target); 124 anim.setValues(values); 125 cancelOnDestroyActivity(anim); 126 new FirstFrameAnimatorHelper(anim, view); 127 return anim; 128 } 129 } 130