| /* |
| * 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.data; |
| |
| import android.content.ContentProviderOperation; |
| import android.content.Context; |
| import android.content.OperationApplicationException; |
| import android.content.SharedPreferences; |
| import android.graphics.Bitmap.CompressFormat; |
| import android.media.tv.TvContract; |
| import android.net.Uri; |
| import android.os.AsyncTask; |
| import android.os.RemoteException; |
| import android.support.annotation.MainThread; |
| import android.text.TextUtils; |
| import android.util.Log; |
| import com.android.tv.common.util.PermissionUtils; |
| import com.android.tv.common.util.SharedPreferencesUtils; |
| import com.android.tv.data.api.Channel; |
| import com.android.tv.util.images.BitmapUtils; |
| import com.android.tv.util.images.BitmapUtils.ScaledBitmapInfo; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * Fetches channel logos from the cloud into the database. It's for the channels which have no logos |
| * or need update logos. This class is thread safe. |
| */ |
| public class ChannelLogoFetcher { |
| private static final String TAG = "ChannelLogoFetcher"; |
| private static final boolean DEBUG = false; |
| |
| private static final String PREF_KEY_IS_FIRST_TIME_FETCH_CHANNEL_LOGO = |
| "is_first_time_fetch_channel_logo"; |
| |
| private static FetchLogoTask sFetchTask; |
| |
| /** |
| * Fetches the channel logos from the cloud data and insert them into TvProvider. The previous |
| * task is canceled and a new task starts. |
| */ |
| @MainThread |
| public static void startFetchingChannelLogos(Context context, List<Channel> channels) { |
| if (!PermissionUtils.hasAccessAllEpg(context)) { |
| // TODO: support this feature for non-system LC app. b/23939816 |
| return; |
| } |
| if (sFetchTask != null) { |
| sFetchTask.cancel(true); |
| sFetchTask = null; |
| } |
| if (DEBUG) Log.d(TAG, "Request to start fetching logos."); |
| if (channels == null || channels.isEmpty()) { |
| return; |
| } |
| sFetchTask = new FetchLogoTask(context.getApplicationContext(), channels); |
| sFetchTask.execute(); |
| } |
| |
| private ChannelLogoFetcher() {} |
| |
| private static final class FetchLogoTask extends AsyncTask<Void, Void, Void> { |
| private final Context mContext; |
| private final List<Channel> mChannels; |
| |
| private FetchLogoTask(Context context, List<Channel> channels) { |
| mContext = context; |
| mChannels = channels; |
| } |
| |
| @Override |
| protected Void doInBackground(Void... arg) { |
| if (isCancelled()) { |
| if (DEBUG) Log.d(TAG, "Fetching the channel logos has been canceled"); |
| return null; |
| } |
| List<Channel> channelsToUpdate = new ArrayList<>(); |
| List<Channel> channelsToRemove = new ArrayList<>(); |
| // Updates or removes the logo by comparing the logo uri which is got from the cloud |
| // and the stored one. And we assume that the data got form the cloud is 100% |
| // correct and completed. |
| SharedPreferences sharedPreferences = |
| mContext.getSharedPreferences( |
| SharedPreferencesUtils.SHARED_PREF_CHANNEL_LOGO_URIS, |
| Context.MODE_PRIVATE); |
| SharedPreferences.Editor sharedPreferencesEditor = sharedPreferences.edit(); |
| Map<String, ?> uncheckedChannels = sharedPreferences.getAll(); |
| boolean isFirstTimeFetchChannelLogo = |
| sharedPreferences.getBoolean(PREF_KEY_IS_FIRST_TIME_FETCH_CHANNEL_LOGO, true); |
| // Iterating channels. |
| for (Channel channel : mChannels) { |
| String channelIdString = Long.toString(channel.getId()); |
| String storedChannelLogoUri = (String) uncheckedChannels.remove(channelIdString); |
| if (!TextUtils.isEmpty(channel.getLogoUri()) |
| && !TextUtils.equals(storedChannelLogoUri, channel.getLogoUri())) { |
| channelsToUpdate.add(channel); |
| sharedPreferencesEditor.putString(channelIdString, channel.getLogoUri()); |
| } else if (TextUtils.isEmpty(channel.getLogoUri()) |
| && (!TextUtils.isEmpty(storedChannelLogoUri) |
| || isFirstTimeFetchChannelLogo)) { |
| channelsToRemove.add(channel); |
| sharedPreferencesEditor.remove(channelIdString); |
| } |
| } |
| |
| // Removes non existing channels from SharedPreferences. |
| for (String channelId : uncheckedChannels.keySet()) { |
| sharedPreferencesEditor.remove(channelId); |
| } |
| |
| // Updates channel logos. |
| for (Channel channel : channelsToUpdate) { |
| if (isCancelled()) { |
| if (DEBUG) Log.d(TAG, "Fetching the channel logos has been canceled"); |
| return null; |
| } |
| // Downloads the channel logo. |
| String logoUri = channel.getLogoUri(); |
| ScaledBitmapInfo bitmapInfo = |
| BitmapUtils.decodeSampledBitmapFromUriString( |
| mContext, logoUri, Integer.MAX_VALUE, Integer.MAX_VALUE); |
| if (bitmapInfo == null) { |
| Log.e( |
| TAG, |
| "Failed to load bitmap. {channelName=" |
| + channel.getDisplayName() |
| + ", " |
| + "logoUri=" |
| + logoUri |
| + "}"); |
| continue; |
| } |
| if (isCancelled()) { |
| if (DEBUG) Log.d(TAG, "Fetching the channel logos has been canceled"); |
| return null; |
| } |
| |
| // Inserts the logo to DB. |
| Uri dstLogoUri = TvContract.buildChannelLogoUri(channel.getId()); |
| try (OutputStream os = mContext.getContentResolver().openOutputStream(dstLogoUri)) { |
| bitmapInfo.bitmap.compress(CompressFormat.PNG, 100, os); |
| } catch (IOException e) { |
| Log.e(TAG, "Failed to write " + logoUri + " to " + dstLogoUri, e); |
| // Removes it from the shared preference for the failed channels to make it |
| // retry next time. |
| sharedPreferencesEditor.remove(Long.toString(channel.getId())); |
| continue; |
| } |
| if (DEBUG) { |
| Log.d( |
| TAG, |
| "Inserting logo file to DB succeeded. {from=" |
| + logoUri |
| + ", to=" |
| + dstLogoUri |
| + "}"); |
| } |
| } |
| |
| // Removes the logos for the channels that have logos before but now |
| // their logo uris are null. |
| boolean deleteChannelLogoFailed = false; |
| if (!channelsToRemove.isEmpty()) { |
| ArrayList<ContentProviderOperation> ops = new ArrayList<>(); |
| for (Channel channel : channelsToRemove) { |
| ops.add( |
| ContentProviderOperation.newDelete( |
| TvContract.buildChannelLogoUri(channel.getId())) |
| .build()); |
| } |
| try { |
| mContext.getContentResolver().applyBatch(TvContract.AUTHORITY, ops); |
| } catch (RemoteException | OperationApplicationException e) { |
| deleteChannelLogoFailed = true; |
| Log.e(TAG, "Error deleting obsolete channels", e); |
| } |
| } |
| if (isFirstTimeFetchChannelLogo && !deleteChannelLogoFailed) { |
| sharedPreferencesEditor.putBoolean( |
| PREF_KEY_IS_FIRST_TIME_FETCH_CHANNEL_LOGO, false); |
| } |
| sharedPreferencesEditor.commit(); |
| if (DEBUG) Log.d(TAG, "Fetching logos has been finished successfully."); |
| return null; |
| } |
| |
| @Override |
| protected void onPostExecute(Void result) { |
| sFetchTask = null; |
| } |
| } |
| } |