TransitionAnimationView.java revision 7913fd1634c84d04417125b9145d5db49b22ab05
1/* 2 * Copyright (C) 2010 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 */ 16package com.android.contacts.widget; 17 18import com.android.contacts.R; 19 20import android.animation.Animator; 21import android.animation.Animator.AnimatorListener; 22import android.animation.AnimatorInflater; 23import android.content.Context; 24import android.content.res.TypedArray; 25import android.graphics.Bitmap; 26import android.graphics.Canvas; 27import android.graphics.Color; 28import android.graphics.Paint; 29import android.graphics.Rect; 30import android.graphics.drawable.BitmapDrawable; 31import android.util.AttributeSet; 32import android.view.View; 33import android.view.ViewParent; 34import android.widget.FrameLayout; 35 36/** 37 * A container for a view that needs to have exit/enter animations when rebinding data. 38 * This layout should have a single child. Just before rebinding data that child 39 * should make this call: 40 * <pre> 41 * TransitionAnimationView.startAnimation(this); 42 * </pre> 43 */ 44public class TransitionAnimationView extends FrameLayout implements AnimatorListener { 45 46 private View mPreviousStateView; 47 private Bitmap mPreviousStateBitmap; 48 private int mEnterAnimationId; 49 private int mExitAnimationId; 50 private int mAnimationDuration; 51 private Rect mClipMargins = new Rect(); 52 private Rect mClipRect = new Rect(); 53 private Animator mEnterAnimation; 54 private Animator mExitAnimation; 55 56 public TransitionAnimationView(Context context) { 57 this(context, null, 0); 58 } 59 60 public TransitionAnimationView(Context context, AttributeSet attrs) { 61 this(context, attrs, 0); 62 } 63 64 public TransitionAnimationView(Context context, AttributeSet attrs, int defStyle) { 65 super(context, attrs, defStyle); 66 67 TypedArray a = getContext().obtainStyledAttributes( 68 attrs, R.styleable.TransitionAnimationView); 69 70 mEnterAnimationId = a.getResourceId(R.styleable.TransitionAnimationView_enterAnimation, 71 android.R.animator.fade_in); 72 mExitAnimationId = a.getResourceId(R.styleable.TransitionAnimationView_exitAnimation, 73 android.R.animator.fade_out); 74 mClipMargins.left = a.getDimensionPixelOffset( 75 R.styleable.TransitionAnimationView_clipMarginLeft, 0); 76 mClipMargins.top = a.getDimensionPixelOffset( 77 R.styleable.TransitionAnimationView_clipMarginTop, 0); 78 mClipMargins.right = a.getDimensionPixelOffset( 79 R.styleable.TransitionAnimationView_clipMarginRight, 0); 80 mClipMargins.bottom = a.getDimensionPixelOffset( 81 R.styleable.TransitionAnimationView_clipMarginBottom, 0); 82 mAnimationDuration = a.getInt( 83 R.styleable.TransitionAnimationView_animationDuration, 100); 84 85 a.recycle(); 86 87 mPreviousStateView = new View(context); 88 mPreviousStateView.setVisibility(View.INVISIBLE); 89 addView(mPreviousStateView); 90 91 mEnterAnimation = AnimatorInflater.loadAnimator(getContext(), mEnterAnimationId); 92 if (mEnterAnimation == null) { 93 throw new IllegalArgumentException("Invalid enter animation: " + mEnterAnimationId); 94 } 95 mEnterAnimation.addListener(this); 96 mEnterAnimation.setDuration(mAnimationDuration); 97 98 mExitAnimation = AnimatorInflater.loadAnimator(getContext(), mExitAnimationId); 99 if (mExitAnimation == null) { 100 throw new IllegalArgumentException("Invalid exit animation: " + mExitAnimationId); 101 } 102 103 } 104 105 @Override 106 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 107 super.onLayout(changed, left, top, right, bottom); 108 if (changed || mPreviousStateBitmap == null) { 109 if (mPreviousStateBitmap != null) { 110 mPreviousStateBitmap.recycle(); 111 mPreviousStateBitmap = null; 112 } 113 int width = right - left; 114 int height = bottom - top; 115 if (width > 0 && height > 0) { 116 mPreviousStateBitmap = Bitmap.createBitmap( 117 width, height, Bitmap.Config.ARGB_8888); 118 mPreviousStateView.setBackgroundDrawable( 119 new BitmapDrawable(getContext().getResources(), mPreviousStateBitmap)); 120 mClipRect.set(mClipMargins.left, mClipMargins.top, 121 width - mClipMargins.right, height - mClipMargins.bottom); 122 } else { 123 mPreviousStateBitmap = null; 124 mPreviousStateView.setBackgroundDrawable(null); 125 } 126 } 127 } 128 129 @Override 130 protected void onDetachedFromWindow() { 131 super.onDetachedFromWindow(); 132 mPreviousStateView.setBackgroundDrawable(null); 133 if (mPreviousStateBitmap != null) { 134 mPreviousStateBitmap.recycle(); 135 mPreviousStateBitmap = null; 136 } 137 } 138 139 public static void startAnimation(View view, boolean closing) { 140 TransitionAnimationView container = null; 141 ViewParent parent = view.getParent(); 142 while (parent instanceof View) { 143 if (parent instanceof TransitionAnimationView) { 144 container = (TransitionAnimationView) parent; 145 break; 146 } 147 parent = parent.getParent(); 148 } 149 150 if (container != null) { 151 container.start(view, closing); 152 } 153 } 154 155 private void start(View view, boolean closing) { 156 if (mEnterAnimation.isRunning()) { 157 mEnterAnimation.end(); 158 } 159 if (mExitAnimation.isRunning()) { 160 mExitAnimation.end(); 161 } 162 if (view.getVisibility() != View.VISIBLE) { 163 if (!closing) { 164 mEnterAnimation.setTarget(view); 165 mEnterAnimation.start(); 166 } 167 } else if (closing) { 168 mExitAnimation.setTarget(view); 169 mExitAnimation.start(); 170 } else { 171 if (mPreviousStateBitmap == null) { 172 return; 173 } 174 175 Canvas canvas = new Canvas(mPreviousStateBitmap); 176 Paint paint = new Paint(); 177 paint.setColor(Color.TRANSPARENT); 178 canvas.drawRect(0, 0, mPreviousStateBitmap.getWidth(), mPreviousStateBitmap.getHeight(), 179 paint); 180 canvas.clipRect(mClipRect); 181 view.draw(canvas); 182 mPreviousStateView.setVisibility(View.VISIBLE); 183 184 mEnterAnimation.setTarget(view); 185 mEnterAnimation.start(); 186 } 187 } 188 189 @Override 190 public void onAnimationEnd(Animator animation) { 191 mPreviousStateView.setVisibility(View.INVISIBLE); 192 } 193 194 @Override 195 public void onAnimationCancel(Animator animation) { 196 } 197 198 @Override 199 public void onAnimationStart(Animator animation) { 200 } 201 202 @Override 203 public void onAnimationRepeat(Animator animation) { 204 } 205} 206