Java tutorial
/* * Copyright (C) 2015 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.tv.menu; import android.content.Context; import android.content.Intent; import android.media.tv.TvInputInfo; import android.os.Build; import android.support.v4.os.BuildCompat; import android.view.View; import com.android.tv.MainActivity; import com.android.tv.R; import com.android.tv.TvApplication; import com.android.tv.analytics.Tracker; import com.android.tv.common.feature.CommonFeatures; import com.android.tv.data.Channel; import com.android.tv.recommendation.Recommender; import com.android.tv.util.SetupUtils; import com.android.tv.util.TvInputManagerHelper; import com.android.tv.util.Utils; import java.util.ArrayList; import java.util.List; /** * An adapter of the Channels row. */ public class ChannelsRowAdapter extends ItemListRowView.ItemListAdapter<Channel> { // There are four special cards: guide, setup, dvr, record, applink. private static final int SIZE_OF_VIEW_TYPE = 5; private final Context mContext; private final Tracker mTracker; private final Recommender mRecommender; private final int mMaxCount; private final int mMinCount; private final boolean mDvrFeatureEnabled; private final int[] mViewType = new int[SIZE_OF_VIEW_TYPE]; private final View.OnClickListener mGuideOnClickListener = new View.OnClickListener() { @Override public void onClick(View view) { mTracker.sendMenuClicked(R.string.channels_item_program_guide); getMainActivity().getOverlayManager().showProgramGuide(); } }; private final View.OnClickListener mSetupOnClickListener = new View.OnClickListener() { @Override public void onClick(View view) { mTracker.sendMenuClicked(R.string.channels_item_setup); getMainActivity().getOverlayManager().showSetupFragment(); } }; private final View.OnClickListener mDvrOnClickListener = new View.OnClickListener() { @Override public void onClick(View view) { Utils.showToastMessageForDeveloperFeature(view.getContext()); mTracker.sendMenuClicked(R.string.channels_item_dvr); getMainActivity().getOverlayManager().showDvrManager(); } }; private final View.OnClickListener mRecordOnClickListener = new View.OnClickListener() { @Override public void onClick(View view) { Utils.showToastMessageForDeveloperFeature(view.getContext()); RecordCardView v = ((RecordCardView) view); boolean isRecording = v.isRecording(); mTracker.sendMenuClicked( isRecording ? R.string.channels_item_record_start : R.string.channels_item_record_stop); if (!isRecording) { v.startRecording(); } else { v.stopRecording(); } } }; private final View.OnClickListener mAppLinkOnClickListener = new View.OnClickListener() { @Override public void onClick(View view) { mTracker.sendMenuClicked(R.string.channels_item_app_link); Intent intent = ((AppLinkCardView) view).getIntent(); if (intent != null) { getMainActivity().startActivitySafe(intent); } } }; private final View.OnClickListener mChannelOnClickListener = new View.OnClickListener() { @Override public void onClick(View view) { // Always send the label "Channels" because the channel ID or name or number might be // sensitive. mTracker.sendMenuClicked(R.string.menu_title_channels); getMainActivity().tuneToChannel((Channel) view.getTag()); getMainActivity().hideOverlaysForTune(); } }; public ChannelsRowAdapter(Context context, Recommender recommender, int minCount, int maxCount) { super(context); mTracker = TvApplication.getSingletons(context).getTracker(); mContext = context; mRecommender = recommender; mMinCount = minCount; mMaxCount = maxCount; mDvrFeatureEnabled = CommonFeatures.DVR.isEnabled(mContext) && BuildCompat.isAtLeastN(); } @Override public int getItemViewType(int position) { if (position >= SIZE_OF_VIEW_TYPE) { return R.layout.menu_card_channel; } return mViewType[position]; } @Override protected int getLayoutResId(int viewType) { return viewType; } @Override public void onBindViewHolder(MyViewHolder viewHolder, int position) { super.onBindViewHolder(viewHolder, position); int viewType = getItemViewType(position); if (viewType == R.layout.menu_card_guide) { viewHolder.itemView.setOnClickListener(mGuideOnClickListener); } else if (viewType == R.layout.menu_card_setup) { viewHolder.itemView.setOnClickListener(mSetupOnClickListener); } else if (viewType == R.layout.menu_card_app_link) { viewHolder.itemView.setOnClickListener(mAppLinkOnClickListener); } else if (viewType == R.layout.menu_card_dvr) { viewHolder.itemView.setOnClickListener(mDvrOnClickListener); } else if (viewType == R.layout.menu_card_record) { viewHolder.itemView.setOnClickListener(mRecordOnClickListener); } else { viewHolder.itemView.setTag(getItemList().get(position)); viewHolder.itemView.setOnClickListener(mChannelOnClickListener); } } @Override public void update() { List<Channel> channelList = new ArrayList<>(); Channel dummyChannel = new Channel.Builder().build(); // For guide item channelList.add(dummyChannel); // For setup item TvInputManagerHelper inputManager = TvApplication.getSingletons(mContext).getTvInputManagerHelper(); boolean showSetupCard = SetupUtils.getInstance(mContext).hasNewInput(inputManager); Channel currentChannel = ((MainActivity) mContext).getCurrentChannel(); boolean showAppLinkCard = Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && currentChannel != null && currentChannel.getAppLinkType(mContext) != Channel.APP_LINK_TYPE_NONE; boolean showDvrCard = false; boolean showRecordCard = false; if (mDvrFeatureEnabled) { for (TvInputInfo info : inputManager.getTvInputInfos(true, true)) { if (info.canRecord()) { showDvrCard = true; break; } } if (currentChannel != null && currentChannel.getInputId() != null) { TvInputInfo inputInfo = inputManager.getTvInputInfo(currentChannel.getInputId()); if ((inputInfo.canRecord() && inputInfo.getTunerCount() > 1)) { showRecordCard = true; } } } mViewType[0] = R.layout.menu_card_guide; int index = 1; if (showSetupCard) { channelList.add(dummyChannel); mViewType[index++] = R.layout.menu_card_setup; } if (showDvrCard) { channelList.add(dummyChannel); mViewType[index++] = R.layout.menu_card_dvr; } if (showRecordCard) { channelList.add(currentChannel); mViewType[index++] = R.layout.menu_card_record; } if (showAppLinkCard) { channelList.add(currentChannel); mViewType[index++] = R.layout.menu_card_app_link; } for (; index < mViewType.length; ++index) { mViewType[index] = R.layout.menu_card_channel; } channelList.addAll(getRecentChannels()); setItemList(channelList); } private List<Channel> getRecentChannels() { List<Channel> channelList = new ArrayList<>(); for (Channel channel : mRecommender.recommendChannels(mMaxCount)) { if (channel.isBrowsable()) { channelList.add(channel); } } int count = channelList.size(); // If the number of recommended channels is not enough, add more from the recent channel // list. if (count < mMinCount && mContext instanceof MainActivity) { for (long channelId : ((MainActivity) mContext).getRecentChannels()) { Channel channel = mRecommender.getChannel(channelId); if (channel == null || channelList.contains(channel) || !channel.isBrowsable()) { continue; } channelList.add(channel); if (++count >= mMinCount) { break; } } } return channelList; } }