Java tutorial
/* * Copyright (C) 2012 Andrew Neal 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.andrew.apollo; import android.annotation.SuppressLint; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.support.v4.app.NotificationCompat; import android.util.Log; import android.widget.RemoteViews; import com.andrew.apollo.utils.ApolloUtils; /** * Builds the notification for Apollo's service. Jelly Bean and higher uses the * expanded notification by default. * * @author Andrew Neal (andrewdneal@gmail.com) */ @SuppressLint("NewApi") public class NotificationHelper { /** * Notification ID */ private static final int APOLLO_MUSIC_SERVICE = 1; /** * NotificationManager */ private final NotificationManager mNotificationManager; /** * Context */ private final MusicPlaybackService mService; /** * Custom notification layout */ private RemoteViews mNotificationTemplate; /** * The Notification */ private Notification mNotification = null; /** * API 16+ bigContentView */ private RemoteViews mExpandedView; /** * Constructor of <code>NotificationHelper</code> * * @param service The {@link Context} to use */ public NotificationHelper(final MusicPlaybackService service) { mService = service; mNotificationManager = (NotificationManager) service.getSystemService(Context.NOTIFICATION_SERVICE); } /** * Call this to build the {@link Notification}. */ public void buildNotification(final String albumName, final String artistName, final String trackName, final Long albumId, final Bitmap albumArt) { // Default notfication layout mNotificationTemplate = new RemoteViews(mService.getPackageName(), R.layout.notification_template_base); // Set up the content view initCollapsedLayout(trackName, artistName, albumArt); if (ApolloUtils.hasHoneycomb()) { // Notification Builder mNotification = new NotificationCompat.Builder(mService).setSmallIcon(R.drawable.stat_notify_music) .setContentIntent(getPendingIntent()).setPriority(Notification.PRIORITY_DEFAULT) .setContent(mNotificationTemplate).build(); // Control playback from the notification initPlaybackActions(); if (ApolloUtils.hasJellyBean()) { // Expanded notifiction style mExpandedView = new RemoteViews(mService.getPackageName(), R.layout.notification_template_expanded_base); mNotification.bigContentView = mExpandedView; // Control playback from the notification initExpandedPlaybackActions(); // Set up the expanded content view initExpandedLayout(trackName, albumName, artistName, albumArt); } mService.startForeground(APOLLO_MUSIC_SERVICE, mNotification); } else { // FIXME: I do not understand why this happens, but the // NotificationCompat // API does not work on Gingerbread. Specifically, {@code // #mBuilder.setContent()} won't apply the custom RV in Gingerbread. // So, // until this is fixed I'll just use the old way. mNotification = new Notification(); mNotification.contentView = mNotificationTemplate; mNotification.flags |= Notification.FLAG_ONGOING_EVENT; mNotification.icon = R.drawable.stat_notify_music; mNotification.contentIntent = getPendingIntent(); mService.startForeground(APOLLO_MUSIC_SERVICE, mNotification); } } /** * Changes the playback controls in and out of a paused state * * @param isPlaying True if music is playing, false otherwise */ public void goToIdleState(final boolean isPlaying) { if (mNotification == null || mNotificationManager == null) { return; } if (ApolloUtils.hasHoneycomb() && mNotificationTemplate != null) { mNotificationTemplate.setImageViewResource(R.id.notification_base_play, isPlaying ? R.drawable.btn_playback_play : R.drawable.btn_playback_pause); } if (ApolloUtils.hasJellyBean() && mExpandedView != null && ApolloUtils.hasJellyBean()) { mExpandedView.setImageViewResource(R.id.notification_expanded_base_play, isPlaying ? R.drawable.btn_playback_play : R.drawable.btn_playback_pause); } try { mNotificationManager.notify(APOLLO_MUSIC_SERVICE, mNotification); } catch (final IllegalStateException e) { Log.e("NotificationHelper", "goToIdleState - " + e); // FIXME Every so often an ISE is throw reading // "can't parcel recycled Bitmap". Figure out and understand why // this is happening, then prevent it. } } /** * Open to the now playing screen */ private PendingIntent getPendingIntent() { return PendingIntent.getActivity(mService, 0, new Intent("com.andrew.apollo.AUDIO_PLAYER").addFlags(Intent.FLAG_ACTIVITY_NEW_TASK), 0); } /** * Lets the buttons in the remote view control playback in the expanded * layout */ private void initExpandedPlaybackActions() { // Play and pause mExpandedView.setOnClickPendingIntent(R.id.notification_expanded_base_play, retreivePlaybackActions(1)); // Skip tracks mExpandedView.setOnClickPendingIntent(R.id.notification_expanded_base_next, retreivePlaybackActions(2)); // Previous tracks mExpandedView.setOnClickPendingIntent(R.id.notification_expanded_base_previous, retreivePlaybackActions(3)); // Stop and collapse the notification mExpandedView.setOnClickPendingIntent(R.id.notification_expanded_base_collapse, retreivePlaybackActions(4)); // Update the play button image mExpandedView.setImageViewResource(R.id.notification_expanded_base_play, R.drawable.btn_playback_pause); } /** * Lets the buttons in the remote view control playback in the normal layout */ private void initPlaybackActions() { // Play and pause mNotificationTemplate.setOnClickPendingIntent(R.id.notification_base_play, retreivePlaybackActions(1)); // Skip tracks mNotificationTemplate.setOnClickPendingIntent(R.id.notification_base_next, retreivePlaybackActions(2)); // Previous tracks mNotificationTemplate.setOnClickPendingIntent(R.id.notification_base_previous, retreivePlaybackActions(3)); // Stop and collapse the notification mNotificationTemplate.setOnClickPendingIntent(R.id.notification_base_collapse, retreivePlaybackActions(4)); // Update the play button image mNotificationTemplate.setImageViewResource(R.id.notification_base_play, R.drawable.btn_playback_pause); } /** * @param which Which {@link PendingIntent} to return * @return A {@link PendingIntent} ready to control playback */ private final PendingIntent retreivePlaybackActions(final int which) { Intent action; PendingIntent pendingIntent; final ComponentName serviceName = new ComponentName(mService, MusicPlaybackService.class); switch (which) { case 1: // Play and pause action = new Intent(MusicPlaybackService.TOGGLEPAUSE_ACTION); action.setComponent(serviceName); pendingIntent = PendingIntent.getService(mService, 1, action, 0); return pendingIntent; case 2: // Skip tracks action = new Intent(MusicPlaybackService.NEXT_ACTION); action.setComponent(serviceName); pendingIntent = PendingIntent.getService(mService, 2, action, 0); return pendingIntent; case 3: // Previous tracks action = new Intent(MusicPlaybackService.PREVIOUS_ACTION); action.setComponent(serviceName); pendingIntent = PendingIntent.getService(mService, 3, action, 0); return pendingIntent; case 4: // Stop and collapse the notification action = new Intent(MusicPlaybackService.STOP_ACTION); action.setComponent(serviceName); pendingIntent = PendingIntent.getService(mService, 4, action, 0); return pendingIntent; default: break; } return null; } /** * Sets the track name, artist name, and album art in the normal layout */ private void initCollapsedLayout(final String trackName, final String artistName, final Bitmap albumArt) { // Track name (line one) mNotificationTemplate.setTextViewText(R.id.notification_base_line_one, trackName); // Artist name (line two) mNotificationTemplate.setTextViewText(R.id.notification_base_line_two, artistName); // Album art mNotificationTemplate.setImageViewBitmap(R.id.notification_base_image, albumArt); } /** * Sets the track name, album name, artist name, and album art in the * expanded layout */ private void initExpandedLayout(final String trackName, final String artistName, final String albumName, final Bitmap albumArt) { // Track name (line one) mExpandedView.setTextViewText(R.id.notification_expanded_base_line_one, trackName); // Album name (line two) mExpandedView.setTextViewText(R.id.notification_expanded_base_line_two, albumName); // Artist name (line three) mExpandedView.setTextViewText(R.id.notification_expanded_base_line_three, artistName); // Album art mExpandedView.setImageViewBitmap(R.id.notification_expanded_base_image, albumArt); } }