Java tutorial
/* * Copyright (C) 2014 Google Inc. All Rights Reserved. * * 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.google.sample.castcompanionlibrary.notification; import static com.google.sample.castcompanionlibrary.utils.LogUtils.LOGD; import static com.google.sample.castcompanionlibrary.utils.LogUtils.LOGE; import com.google.android.gms.cast.MediaInfo; import com.google.android.gms.cast.MediaMetadata; import com.google.android.gms.cast.MediaStatus; import com.google.sample.castcompanionlibrary.R; import com.google.sample.castcompanionlibrary.cast.VideoCastManager; import com.google.sample.castcompanionlibrary.cast.callbacks.VideoCastConsumerImpl; import com.google.sample.castcompanionlibrary.cast.exceptions.CastException; import com.google.sample.castcompanionlibrary.cast.exceptions.NoConnectionException; import com.google.sample.castcompanionlibrary.cast.exceptions.TransientNetworkDisconnectionException; import com.google.sample.castcompanionlibrary.cast.player.VideoCastControllerActivity; import com.google.sample.castcompanionlibrary.utils.FetchBitmapTask; import com.google.sample.castcompanionlibrary.utils.LogUtils; import com.google.sample.castcompanionlibrary.utils.Utils; import android.annotation.TargetApi; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.os.IBinder; import android.support.v4.app.NotificationCompat; import android.support.v4.app.TaskStackBuilder; import android.widget.RemoteViews; /** * A service to provide status bar Notifications when we are casting. For JB+ versions, notification * area provides a play/pause toggle and an "x" button to disconnect but that for GB, we do not * show that due to the framework limitations. */ public class VideoCastNotificationService extends Service { private static final String TAG = LogUtils.makeLogTag(VideoCastNotificationService.class); public static final String ACTION_TOGGLE_PLAYBACK = "com.google.sample.castcompanionlibrary.action.toggleplayback"; public static final String ACTION_STOP = "com.google.sample.castcompanionlibrary.action.stop"; public static final String ACTION_VISIBILITY = "com.google.sample.castcompanionlibrary.action.notificationvisibility"; private static final int NOTIFICATION_ID = 1; public static final String NOTIFICATION_VISIBILITY = "visible"; private String mApplicationId; private Bitmap mVideoArtBitmap; private Uri mVideoArtUri; private boolean mIsPlaying; private Class<?> mTargetActivity; private String mDataNamespace; private int mStatus; private int mOldStatus = -1; private Notification mNotification; private boolean mVisible; boolean mIsIcsOrAbove = Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH; boolean mIsLollipopOrAbove = Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP; private VideoCastManager mCastManager; private VideoCastConsumerImpl mConsumer; private FetchBitmapTask mBitmapDecoderTask; @Override public void onCreate() { super.onCreate(); LOGD(TAG, "onCreate()"); readPersistedData(); mCastManager = VideoCastManager.initialize(this, mApplicationId, mTargetActivity, mDataNamespace); if (!mCastManager.isConnected() && !mCastManager.isConnecting()) { mCastManager.reconnectSessionIfPossible(); } mConsumer = new VideoCastConsumerImpl() { @Override public void onApplicationDisconnected(int errorCode) { LOGD(TAG, "onApplicationDisconnected() was reached, stopping the notification" + " service"); stopSelf(); } @Override public void onRemoteMediaPlayerStatusUpdated() { int mediaStatus = mCastManager.getPlaybackStatus(); VideoCastNotificationService.this.onRemoteMediaPlayerStatusUpdated(mediaStatus); } @Override public void onUiVisibilityChanged(boolean visible) { mVisible = !visible; if (mVisible && null != mNotification) { startForeground(NOTIFICATION_ID, mNotification); } else { stopForeground(true); } } }; mCastManager.addVideoCastConsumer(mConsumer); } @Override public IBinder onBind(Intent arg0) { return null; } @Override public int onStartCommand(Intent intent, int flags, int startId) { LOGD(TAG, "onStartCommand"); if (null != intent) { String action = intent.getAction(); if (ACTION_TOGGLE_PLAYBACK.equals(action) && mIsIcsOrAbove) { LOGD(TAG, "onStartCommand(): Action: ACTION_TOGGLE_PLAYBACK"); togglePlayback(); } else if (ACTION_STOP.equals(action) && mIsIcsOrAbove) { LOGD(TAG, "onStartCommand(): Action: ACTION_STOP"); stopApplication(); } else if (ACTION_VISIBILITY.equals(action)) { mVisible = intent.getBooleanExtra(NOTIFICATION_VISIBILITY, false); LOGD(TAG, "onStartCommand(): Action: ACTION_VISIBILITY " + mVisible); if (mVisible) { if (mNotification != null) { startForeground(NOTIFICATION_ID, mNotification); } else { try { setupNotification(mCastManager.getRemoteMediaInformation()); } catch (TransientNetworkDisconnectionException e) { LOGE(TAG, "onStartCommand() failed to get media", e); } catch (NoConnectionException e) { LOGE(TAG, "onStartCommand() failed to get media", e); } } } else { stopForeground(true); } } else { LOGD(TAG, "onStartCommand(): Action: none"); } } else { LOGD(TAG, "onStartCommand(): Intent was null"); } return Service.START_STICKY; } private void setupNotification(final MediaInfo info) throws TransientNetworkDisconnectionException, NoConnectionException { if (null == info) { return; } if (null != mBitmapDecoderTask) { mBitmapDecoderTask.cancel(false); } Uri imgUri = null; try { if (!info.getMetadata().hasImages()) { build(info, null, mIsPlaying); return; } else { imgUri = info.getMetadata().getImages().get(0).getUrl(); if (imgUri.equals(mVideoArtUri)) { build(info, mVideoArtBitmap, mIsPlaying); return; } } } catch (CastException e) { LOGE(TAG, "Failed to build notification"); } mBitmapDecoderTask = new FetchBitmapTask(400, 400) { @Override protected void onPostExecute(Bitmap bitmap) { try { mVideoArtBitmap = Utils.scaleCenterCrop(bitmap, 256, 256); build(info, mVideoArtBitmap, mIsPlaying); } catch (CastException e) { LOGE(TAG, "Failed to set notification for " + info.toString(), e); } catch (TransientNetworkDisconnectionException e) { LOGE(TAG, "Failed to set notification for " + info.toString(), e); } catch (NoConnectionException e) { LOGE(TAG, "Failed to set notification for " + info.toString(), e); } if (mVisible) { startForeground(NOTIFICATION_ID, mNotification); } if (this == mBitmapDecoderTask) { mBitmapDecoderTask = null; } } }; mBitmapDecoderTask.start(imgUri); } /** * Removes the existing notification. */ private void removeNotification() { ((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).cancel(NOTIFICATION_ID); } private void onRemoteMediaPlayerStatusUpdated(int mediaStatus) { mStatus = mediaStatus; if (mOldStatus == mStatus) { // not need to make any updates here return; } mOldStatus = mStatus; LOGD(TAG, "onRemoteMediaPlayerStatusUpdated() reached with status: " + mStatus); try { switch (mediaStatus) { case MediaStatus.PLAYER_STATE_BUFFERING: // (== 4) mIsPlaying = false; setupNotification(mCastManager.getRemoteMediaInformation()); break; case MediaStatus.PLAYER_STATE_PLAYING: // (== 2) mIsPlaying = true; setupNotification(mCastManager.getRemoteMediaInformation()); break; case MediaStatus.PLAYER_STATE_PAUSED: // (== 3) mIsPlaying = false; setupNotification(mCastManager.getRemoteMediaInformation()); break; case MediaStatus.PLAYER_STATE_IDLE: // (== 1) mIsPlaying = false; if (!mCastManager.shouldRemoteUiBeVisible(mediaStatus, mCastManager.getIdleReason())) { stopForeground(true); } else { setupNotification(mCastManager.getRemoteMediaInformation()); } break; case MediaStatus.PLAYER_STATE_UNKNOWN: // (== 0) mIsPlaying = false; stopForeground(true); break; default: break; } } catch (TransientNetworkDisconnectionException e) { LOGE(TAG, "Failed to update the playback status due to network issues", e); } catch (NoConnectionException e) { LOGE(TAG, "Failed to update the playback status due to network issues", e); } } /* * (non-Javadoc) * @see android.app.Service#onDestroy() */ @Override public void onDestroy() { if (null != mBitmapDecoderTask) { mBitmapDecoderTask.cancel(false); } LOGD(TAG, "onDestroy was called"); removeNotification(); if (null != mCastManager && null != mConsumer) { mCastManager.removeVideoCastConsumer(mConsumer); mCastManager = null; } } /* * Build the RemoteViews for the notification. We also need to add the appropriate "back stack" * so when user goes into the CastPlayerActivity, she can have a meaningful "back" experience. */ private RemoteViews build(MediaInfo info, Bitmap bitmap, boolean isPlaying) throws CastException, TransientNetworkDisconnectionException, NoConnectionException { if (mIsLollipopOrAbove) { buildForLollipopAndAbove(info, bitmap, isPlaying); return null; } Bundle mediaWrapper = Utils.fromMediaInfo(mCastManager.getRemoteMediaInformation()); Intent contentIntent = new Intent(this, mTargetActivity); contentIntent.putExtra("media", mediaWrapper); TaskStackBuilder stackBuilder = TaskStackBuilder.create(this); stackBuilder.addParentStack(mTargetActivity); stackBuilder.addNextIntent(contentIntent); if (stackBuilder.getIntentCount() > 1) { stackBuilder.editIntentAt(1).putExtra("media", mediaWrapper); } // Gets a PendingIntent containing the entire back stack PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(NOTIFICATION_ID, PendingIntent.FLAG_UPDATE_CURRENT); MediaMetadata mm = info.getMetadata(); RemoteViews rv = new RemoteViews(getPackageName(), R.layout.custom_notification); if (mIsIcsOrAbove) { addPendingIntents(rv, isPlaying, info); } if (null != bitmap) { rv.setImageViewBitmap(R.id.iconView, bitmap); } else { bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.dummy_album_art); rv.setImageViewBitmap(R.id.iconView, bitmap); } rv.setTextViewText(R.id.titleView, mm.getString(MediaMetadata.KEY_TITLE)); String castingTo = getResources().getString(R.string.casting_to_device, mCastManager.getDeviceName()); rv.setTextViewText(R.id.subTitleView, castingTo); mNotification = new NotificationCompat.Builder(this).setSmallIcon(R.drawable.ic_stat_action_notification) .setContentIntent(resultPendingIntent).setContent(rv).setAutoCancel(false).setOngoing(true).build(); // to get around a bug in GB version, we add the following line // see https://code.google.com/p/android/issues/detail?id=30495 mNotification.contentView = rv; return rv; } @TargetApi(Build.VERSION_CODES.LOLLIPOP) private void buildForLollipopAndAbove(MediaInfo info, Bitmap bitmap, boolean isPlaying) throws CastException, TransientNetworkDisconnectionException, NoConnectionException { // Playback PendingIntent Intent playbackIntent = new Intent(ACTION_TOGGLE_PLAYBACK); playbackIntent.setPackage(getPackageName()); PendingIntent playbackPendingIntent = PendingIntent.getBroadcast(this, 0, playbackIntent, 0); // Disconnect PendingIntent Intent stopIntent = new Intent(ACTION_STOP); stopIntent.setPackage(getPackageName()); PendingIntent stopPendingIntent = PendingIntent.getBroadcast(this, 0, stopIntent, 0); // Main Content PendingIntent Bundle mediaWrapper = Utils.fromMediaInfo(mCastManager.getRemoteMediaInformation()); Intent contentIntent = new Intent(this, mTargetActivity); contentIntent.putExtra("media", mediaWrapper); // Media metadata MediaMetadata mm = info.getMetadata(); String castingTo = getResources().getString(R.string.casting_to_device, mCastManager.getDeviceName()); TaskStackBuilder stackBuilder = TaskStackBuilder.create(this); stackBuilder.addParentStack(mTargetActivity); stackBuilder.addNextIntent(contentIntent); if (stackBuilder.getIntentCount() > 1) { stackBuilder.editIntentAt(1).putExtra("media", mediaWrapper); } PendingIntent contentPendingIntent = stackBuilder.getPendingIntent(NOTIFICATION_ID, PendingIntent.FLAG_UPDATE_CURRENT); mNotification = new Notification.Builder(this).setSmallIcon(R.drawable.ic_stat_action_notification) .setContentTitle(mm.getString(MediaMetadata.KEY_TITLE)).setContentText(castingTo) .setContentIntent(contentPendingIntent).setLargeIcon(bitmap) .addAction(isPlaying ? R.drawable.ic_pause_white_48dp : R.drawable.ic_play_arrow_white_48dp, getString(R.string.pause), playbackPendingIntent) .addAction(R.drawable.ic_clear_white_24dp, getString(R.string.disconnect), stopPendingIntent) .setStyle(new Notification.MediaStyle().setShowActionsInCompactView(new int[] { 0, 1 })) .setOngoing(true).setShowWhen(false).setVisibility(Notification.VISIBILITY_PUBLIC).build(); } private void addPendingIntents(RemoteViews rv, boolean isPlaying, MediaInfo info) { Intent playbackIntent = new Intent(ACTION_TOGGLE_PLAYBACK); playbackIntent.setPackage(getPackageName()); PendingIntent playbackPendingIntent = PendingIntent.getBroadcast(this, 0, playbackIntent, 0); Intent stopIntent = new Intent(ACTION_STOP); stopIntent.setPackage(getPackageName()); PendingIntent stopPendingIntent = PendingIntent.getBroadcast(this, 0, stopIntent, 0); rv.setOnClickPendingIntent(R.id.playPauseView, playbackPendingIntent); rv.setOnClickPendingIntent(R.id.removeView, stopPendingIntent); if (isPlaying) { if (info.getStreamType() == MediaInfo.STREAM_TYPE_LIVE) { rv.setImageViewResource(R.id.playPauseView, R.drawable.ic_av_stop_sm_dark); } else { rv.setImageViewResource(R.id.playPauseView, R.drawable.ic_av_pause_sm_dark); } } else { rv.setImageViewResource(R.id.playPauseView, R.drawable.ic_av_play_sm_dark); } } private void togglePlayback() { try { mCastManager.togglePlayback(); } catch (Exception e) { LOGE(TAG, "Failed to toggle the playback", e); } } /* * We try to disconnect application but even if that fails, we need to remove notification since * that is the only way to get rid of it without going to the application */ private void stopApplication() { try { LOGD(TAG, "Calling stopApplication"); mCastManager.disconnect(); } catch (Exception e) { LOGE(TAG, "Failed to disconnect application", e); } LOGD(TAG, "Stopping the notification service"); stopSelf(); } /* * Reads application ID and target activity from preference storage. */ private void readPersistedData() { mApplicationId = Utils.getStringFromPreference(this, VideoCastManager.PREFS_KEY_APPLICATION_ID); String targetName = Utils.getStringFromPreference(this, VideoCastManager.PREFS_KEY_CAST_ACTIVITY_NAME); mDataNamespace = Utils.getStringFromPreference(this, VideoCastManager.PREFS_KEY_CAST_CUSTOM_DATA_NAMESPACE); try { if (null != targetName) { mTargetActivity = Class.forName(targetName); } else { mTargetActivity = VideoCastControllerActivity.class; } } catch (ClassNotFoundException e) { LOGE(TAG, "Failed to find the targetActivity class", e); } } }