1/* 2 * Copyright (C) 2016 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 17package com.android.tv.dvr.ui; 18 19import android.animation.Animator; 20import android.animation.ObjectAnimator; 21import android.content.Context; 22import android.content.res.TypedArray; 23import android.graphics.Color; 24import android.graphics.drawable.ColorDrawable; 25import android.graphics.drawable.Drawable; 26import android.transition.Transition; 27import android.transition.TransitionValues; 28import android.transition.Visibility; 29import android.util.AttributeSet; 30import android.view.ViewGroup; 31 32import com.android.tv.R; 33 34/** 35 * This transition fades in/out of the background of the view by changing the background color. 36 */ 37public class FadeBackground extends Transition { 38 private final int mMode; 39 40 public FadeBackground(Context context, AttributeSet attrs) { 41 super(context, attrs); 42 TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.FadeBackground); 43 mMode = a.getInt(R.styleable.FadeBackground_fadingMode, Visibility.MODE_IN); 44 a.recycle(); 45 } 46 47 @Override 48 public void captureStartValues(TransitionValues transitionValues) { } 49 50 @Override 51 public void captureEndValues(TransitionValues transitionValues) { } 52 53 @Override 54 public Animator createAnimator(ViewGroup sceneRoot, TransitionValues startValues, 55 TransitionValues endValues) { 56 if (startValues == null || endValues == null) { 57 return null; 58 } 59 Drawable background = endValues.view.getBackground(); 60 if (background instanceof ColorDrawable) { 61 int color = ((ColorDrawable) background).getColor(); 62 int transparentColor = Color.argb(0, Color.red(color), Color.green(color), 63 Color.blue(color)); 64 return mMode == Visibility.MODE_OUT 65 ? ObjectAnimator.ofArgb(background, "color", transparentColor) 66 : ObjectAnimator.ofArgb(background, "color", transparentColor, color); 67 } 68 return null; 69 } 70} 71