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.util.Property; 25 import android.view.View; 26 import android.view.ViewTreeObserver; 27 28 import java.util.HashSet; 29 import java.util.WeakHashMap; 30 31 public class LauncherAnimUtils { 32 static WeakHashMap<Animator, Object> sAnimators = new WeakHashMap<Animator, Object>(); 33 static Animator.AnimatorListener sEndAnimListener = new Animator.AnimatorListener() { 34 public void onAnimationStart(Animator animation) { 35 sAnimators.put(animation, null); 36 } 37 38 public void onAnimationRepeat(Animator animation) { 39 } 40 41 public void onAnimationEnd(Animator animation) { 42 sAnimators.remove(animation); 43 } 44 45 public void onAnimationCancel(Animator animation) { 46 sAnimators.remove(animation); 47 } 48 }; 49 cancelOnDestroyActivity(Animator a)50 public static void cancelOnDestroyActivity(Animator a) { 51 a.addListener(sEndAnimListener); 52 } 53 54 // Helper method. Assumes a draw is pending, and that if the animation's duration is 0 55 // it should be cancelled startAnimationAfterNextDraw(final Animator animator, final View view)56 public static void startAnimationAfterNextDraw(final Animator animator, final View view) { 57 view.getViewTreeObserver().addOnDrawListener(new ViewTreeObserver.OnDrawListener() { 58 private boolean mStarted = false; 59 60 public void onDraw() { 61 if (mStarted) return; 62 mStarted = true; 63 // Use this as a signal that the animation was cancelled 64 if (animator.getDuration() == 0) { 65 return; 66 } 67 animator.start(); 68 69 final ViewTreeObserver.OnDrawListener listener = this; 70 view.post(new Runnable() { 71 public void run() { 72 view.getViewTreeObserver().removeOnDrawListener(listener); 73 } 74 }); 75 } 76 }); 77 } 78 onDestroyActivity()79 public static void onDestroyActivity() { 80 HashSet<Animator> animators = new HashSet<Animator>(sAnimators.keySet()); 81 for (Animator a : animators) { 82 if (a.isRunning()) { 83 a.cancel(); 84 } 85 sAnimators.remove(a); 86 } 87 } 88 createAnimatorSet()89 public static AnimatorSet createAnimatorSet() { 90 AnimatorSet anim = new AnimatorSet(); 91 cancelOnDestroyActivity(anim); 92 return anim; 93 } 94 ofFloat(View target, float... values)95 public static ValueAnimator ofFloat(View target, float... values) { 96 ValueAnimator anim = new ValueAnimator(); 97 anim.setFloatValues(values); 98 cancelOnDestroyActivity(anim); 99 return anim; 100 } 101 ofFloat(View target, Property<View, Float> property, float... values)102 public static ObjectAnimator ofFloat(View target, Property<View, Float> property, 103 float... values) { 104 ObjectAnimator anim = ObjectAnimator.ofFloat(target, property, values); 105 cancelOnDestroyActivity(anim); 106 new FirstFrameAnimatorHelper(anim, target); 107 return anim; 108 } 109 ofViewAlphaAndScale(View target, float alpha, float scaleX, float scaleY)110 public static ObjectAnimator ofViewAlphaAndScale(View target, 111 float alpha, float scaleX, float scaleY) { 112 return ofPropertyValuesHolder(target, 113 PropertyValuesHolder.ofFloat(View.ALPHA, alpha), 114 PropertyValuesHolder.ofFloat(View.SCALE_X, scaleX), 115 PropertyValuesHolder.ofFloat(View.SCALE_Y, scaleY)); 116 } 117 ofPropertyValuesHolder(View target, PropertyValuesHolder... values)118 public static ObjectAnimator ofPropertyValuesHolder(View target, 119 PropertyValuesHolder... values) { 120 return ofPropertyValuesHolder(target, target, values); 121 } 122 ofPropertyValuesHolder(Object target, View view, PropertyValuesHolder... values)123 public static ObjectAnimator ofPropertyValuesHolder(Object target, 124 View view, PropertyValuesHolder... values) { 125 ObjectAnimator anim = ObjectAnimator.ofPropertyValuesHolder(target, values); 126 cancelOnDestroyActivity(anim); 127 new FirstFrameAnimatorHelper(anim, view); 128 return anim; 129 } 130 } 131