ChannelsRow.java revision 816a4be1a0f34f6a48877c8afd3dbbca19eac435 
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
17package com.android.tv.menu;
18
19import android.content.Context;
20
21import com.android.tv.R;
22import com.android.tv.common.TvCommonConstants;
23import com.android.tv.recommendation.RecentChannelEvaluator;
24import com.android.tv.recommendation.Recommender;
25
26public 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
36    public ChannelsRow(Context context) {
37        super(context,
38                TvCommonConstants.IS_MNC_OR_HIGHER
39                        ? R.string.menu_title_channels : R.string.menu_title_channels_legacy,
40                R.dimen.card_layout_height,
41                null);
42        mTvRecommendation = new Recommender(getContext(), new Recommender.Listener() {
43            @Override
44            public void onRecommenderReady() {
45                mChannelsAdapter.update();
46                mChannelsPosterPrefetcher.prefetch();
47            }
48
49            @Override
50            public void onRecommendationChanged() {
51                mChannelsAdapter.update();
52                mChannelsPosterPrefetcher.prefetch();
53            }
54        }, true);
55        mTvRecommendation.registerEvaluator(new RecentChannelEvaluator());
56        mChannelsAdapter = new ChannelsRowAdapter(context, mTvRecommendation,
57                MIN_COUNT_FOR_RECENT_CHANNELS, MAX_COUNT_FOR_RECENT_CHANNELS);
58        setAdapter(mChannelsAdapter);
59        mChannelsPosterPrefetcher = new ChannelsPosterPrefetcher(context,
60                getMainActivity().getProgramDataManager(), mChannelsAdapter);
61    }
62
63    @Override
64    public void release() {
65        super.release();
66        mTvRecommendation.release();
67        mTvRecommendation = null;
68    }
69
70    /**
71     * Handle the update event of the recent channel.
72     */
73    public void onRecentChannelUpdated() {
74        mChannelsPosterPrefetcher.prefetch();
75    }
76
77    @Override
78    public String getId() {
79        return ID;
80    }
81}
82