1/* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14 15package android.support.v17.leanback.supportleanbackshowcase.cards.presenters; 16 17import android.animation.ObjectAnimator; 18import android.content.Context; 19import android.graphics.drawable.Drawable; 20import android.support.v17.leanback.supportleanbackshowcase.R; 21import android.support.v17.leanback.widget.ImageCardView; 22import android.view.View; 23import android.widget.ImageView; 24 25/** 26 * This Presenter will display cards which consists of a single icon which will be highlighted by a 27 * surrounding circle when the card is focused. AndroidTV uses these cards for entering settings 28 * menu. 29 */ 30public class IconCardPresenter extends ImageCardViewPresenter { 31 private static final int ANIMATION_DURATION = 200; 32 33 public IconCardPresenter(Context context) { 34 super(context, R.style.IconCardTheme); 35 } 36 37 @Override 38 protected ImageCardView onCreateView() { 39 final ImageCardView imageCardView = super.onCreateView(); 40 final ImageView image = imageCardView.getMainImageView(); 41 image.setBackgroundResource(R.drawable.icon_focused); 42 image.getBackground().setAlpha(0); 43 imageCardView.setOnFocusChangeListener(new View.OnFocusChangeListener() { 44 @Override 45 public void onFocusChange(View v, boolean hasFocus) { 46 animateIconBackground(image.getBackground(), hasFocus); 47 } 48 }); 49 return imageCardView; 50 } 51 52 private void animateIconBackground(Drawable drawable, boolean hasFocus) { 53 if (hasFocus) { 54 ObjectAnimator.ofInt(drawable, "alpha", 0, 255).setDuration(ANIMATION_DURATION).start(); 55 } else { 56 ObjectAnimator.ofInt(drawable, "alpha", 255, 0).setDuration(ANIMATION_DURATION).start(); 57 } 58 } 59} 60