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.launcher2; 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 29 public class LauncherAnimUtils { 30 static HashSet<Animator> sAnimators = new HashSet<Animator>(); 31 static Animator.AnimatorListener sEndAnimListener = new Animator.AnimatorListener() { 32 public void onAnimationStart(Animator animation) { 33 } 34 35 public void onAnimationRepeat(Animator animation) { 36 } 37 38 public void onAnimationEnd(Animator animation) { 39 sAnimators.remove(animation); 40 } 41 42 public void onAnimationCancel(Animator animation) { 43 sAnimators.remove(animation); 44 } 45 }; 46 cancelOnDestroyActivity(Animator a)47 public static void cancelOnDestroyActivity(Animator a) { 48 sAnimators.add(a); 49 a.addListener(sEndAnimListener); 50 } 51 52 // Helper method. Assumes a draw is pending, and that if the animation's duration is 0 53 // it should be cancelled startAnimationAfterNextDraw(final Animator animator, final View view)54 public static void startAnimationAfterNextDraw(final Animator animator, final View view) { 55 view.getViewTreeObserver().addOnDrawListener(new ViewTreeObserver.OnDrawListener() { 56 private boolean mStarted = false; 57 public void onDraw() { 58 if (mStarted) return; 59 mStarted = true; 60 // Use this as a signal that the animation was cancelled 61 if (animator.getDuration() == 0) { 62 return; 63 } 64 animator.start(); 65 66 final ViewTreeObserver.OnDrawListener listener = this; 67 view.post(new Runnable() { 68 public void run() { 69 view.getViewTreeObserver().removeOnDrawListener(listener); 70 } 71 }); 72 } 73 }); 74 } 75 onDestroyActivity()76 public static void onDestroyActivity() { 77 HashSet<Animator> animators = new HashSet<Animator>(sAnimators); 78 for (Animator a : animators) { 79 if (a.isRunning()) { 80 a.cancel(); 81 } else { 82 sAnimators.remove(a); 83 } 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