1 /* 2 * Copyright (C) 2014 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.support.v7.view; 18 19 import static android.support.annotation.RestrictTo.Scope.LIBRARY_GROUP; 20 21 import android.support.annotation.RestrictTo; 22 import android.support.v4.view.ViewPropertyAnimatorCompat; 23 import android.support.v4.view.ViewPropertyAnimatorListener; 24 import android.support.v4.view.ViewPropertyAnimatorListenerAdapter; 25 import android.view.View; 26 import android.view.animation.Interpolator; 27 28 import java.util.ArrayList; 29 30 /** 31 * A very naive implementation of a set of 32 * {@link android.support.v4.view.ViewPropertyAnimatorCompat}. 33 * 34 * @hide 35 */ 36 @RestrictTo(LIBRARY_GROUP) 37 public class ViewPropertyAnimatorCompatSet { 38 39 final ArrayList<ViewPropertyAnimatorCompat> mAnimators; 40 41 private long mDuration = -1; 42 private Interpolator mInterpolator; 43 ViewPropertyAnimatorListener mListener; 44 45 private boolean mIsStarted; 46 ViewPropertyAnimatorCompatSet()47 public ViewPropertyAnimatorCompatSet() { 48 mAnimators = new ArrayList<ViewPropertyAnimatorCompat>(); 49 } 50 play(ViewPropertyAnimatorCompat animator)51 public ViewPropertyAnimatorCompatSet play(ViewPropertyAnimatorCompat animator) { 52 if (!mIsStarted) { 53 mAnimators.add(animator); 54 } 55 return this; 56 } 57 playSequentially(ViewPropertyAnimatorCompat anim1, ViewPropertyAnimatorCompat anim2)58 public ViewPropertyAnimatorCompatSet playSequentially(ViewPropertyAnimatorCompat anim1, 59 ViewPropertyAnimatorCompat anim2) { 60 mAnimators.add(anim1); 61 anim2.setStartDelay(anim1.getDuration()); 62 mAnimators.add(anim2); 63 return this; 64 } 65 start()66 public void start() { 67 if (mIsStarted) return; 68 for (ViewPropertyAnimatorCompat animator : mAnimators) { 69 if (mDuration >= 0) { 70 animator.setDuration(mDuration); 71 } 72 if (mInterpolator != null) { 73 animator.setInterpolator(mInterpolator); 74 } 75 if (mListener != null) { 76 animator.setListener(mProxyListener); 77 } 78 animator.start(); 79 } 80 81 mIsStarted = true; 82 } 83 onAnimationsEnded()84 void onAnimationsEnded() { 85 mIsStarted = false; 86 } 87 cancel()88 public void cancel() { 89 if (!mIsStarted) { 90 return; 91 } 92 for (ViewPropertyAnimatorCompat animator : mAnimators) { 93 animator.cancel(); 94 } 95 mIsStarted = false; 96 } 97 setDuration(long duration)98 public ViewPropertyAnimatorCompatSet setDuration(long duration) { 99 if (!mIsStarted) { 100 mDuration = duration; 101 } 102 return this; 103 } 104 setInterpolator(Interpolator interpolator)105 public ViewPropertyAnimatorCompatSet setInterpolator(Interpolator interpolator) { 106 if (!mIsStarted) { 107 mInterpolator = interpolator; 108 } 109 return this; 110 } 111 setListener(ViewPropertyAnimatorListener listener)112 public ViewPropertyAnimatorCompatSet setListener(ViewPropertyAnimatorListener listener) { 113 if (!mIsStarted) { 114 mListener = listener; 115 } 116 return this; 117 } 118 119 private final ViewPropertyAnimatorListenerAdapter mProxyListener 120 = new ViewPropertyAnimatorListenerAdapter() { 121 private boolean mProxyStarted = false; 122 private int mProxyEndCount = 0; 123 124 @Override 125 public void onAnimationStart(View view) { 126 if (mProxyStarted) { 127 return; 128 } 129 mProxyStarted = true; 130 if (mListener != null) { 131 mListener.onAnimationStart(null); 132 } 133 } 134 135 void onEnd() { 136 mProxyEndCount = 0; 137 mProxyStarted = false; 138 onAnimationsEnded(); 139 } 140 141 @Override 142 public void onAnimationEnd(View view) { 143 if (++mProxyEndCount == mAnimators.size()) { 144 if (mListener != null) { 145 mListener.onAnimationEnd(null); 146 } 147 onEnd(); 148 } 149 } 150 }; 151 } 152