1 /* 2 * Copyright (C) 2015 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.tv.menu; 18 19 import android.content.Context; 20 21 import com.android.tv.R; 22 import com.android.tv.data.ProgramDataManager; 23 import com.android.tv.recommendation.RecentChannelEvaluator; 24 import com.android.tv.recommendation.Recommender; 25 26 public class ChannelsRow extends ItemListRow { 27 public static final String ID = ChannelsRow.class.getName(); 28 29 private static final int MIN_COUNT_FOR_RECENT_CHANNELS = 5; 30 private static final int MAX_COUNT_FOR_RECENT_CHANNELS = 10; 31 32 private Recommender mTvRecommendation; 33 private ChannelsRowAdapter mChannelsAdapter; 34 private ChannelsPosterPrefetcher mChannelsPosterPrefetcher; 35 ChannelsRow(Context context, Menu menu, ProgramDataManager programDataManager)36 public ChannelsRow(Context context, Menu menu, ProgramDataManager programDataManager) { 37 super(context, menu, R.string.menu_title_channels, R.dimen.card_layout_height, null); 38 mTvRecommendation = new Recommender(getContext(), new Recommender.Listener() { 39 @Override 40 public void onRecommenderReady() { 41 mChannelsAdapter.update(); 42 mChannelsPosterPrefetcher.prefetch(); 43 } 44 45 @Override 46 public void onRecommendationChanged() { 47 mChannelsAdapter.update(); 48 mChannelsPosterPrefetcher.prefetch(); 49 } 50 }, true); 51 mTvRecommendation.registerEvaluator(new RecentChannelEvaluator()); 52 mChannelsAdapter = new ChannelsRowAdapter(context, mTvRecommendation, 53 MIN_COUNT_FOR_RECENT_CHANNELS, MAX_COUNT_FOR_RECENT_CHANNELS); 54 setAdapter(mChannelsAdapter); 55 mChannelsPosterPrefetcher = new ChannelsPosterPrefetcher(context, programDataManager, 56 mChannelsAdapter); 57 } 58 59 @Override release()60 public void release() { 61 super.release(); 62 if (mTvRecommendation != null) { 63 mTvRecommendation.release(); 64 mTvRecommendation = null; 65 } 66 mChannelsPosterPrefetcher.cancel(); 67 } 68 69 /** 70 * Handle the update event of the recent channel. 71 */ 72 @Override onRecentChannelsChanged()73 public void onRecentChannelsChanged() { 74 mChannelsPosterPrefetcher.prefetch(); 75 } 76 77 @Override getId()78 public String getId() { 79 return ID; 80 } 81 } 82