Java tutorial
/* * Copyright (C) 2007 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.boko.vimusic; 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.boko.vimusic.service.MediaPlaybackService; import com.boko.vimusic.utils.CommonUtils; /** * Builds the notification for media service. Jelly Bean and higher uses the * expanded notification by default. * */ @SuppressLint("NewApi") public class NotificationHelper { /** * Notification ID */ private static final int APOLLO_MUSIC_SERVICE = 1; /** * NotificationManager */ private final NotificationManager mNotificationManager; /** * Context */ private final MediaPlaybackService 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 MediaPlaybackService 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 String albumId, final Bitmap albumArt, final boolean isPlaying) { // Default notfication layout mNotificationTemplate = new RemoteViews(mService.getPackageName(), R.layout.notification_template_base); // Set up the content view initCollapsedLayout(trackName, artistName, albumArt); // 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(isPlaying); if (CommonUtils.hasJellyBean()) { // Expanded notifiction style mExpandedView = new RemoteViews(mService.getPackageName(), R.layout.notification_template_expanded_base); mNotification.bigContentView = mExpandedView; // Control playback from the notification initExpandedPlaybackActions(isPlaying); // Set up the expanded content view initExpandedLayout(trackName, albumName, artistName, albumArt); } mService.startForeground(APOLLO_MUSIC_SERVICE, mNotification); } /** * Remove notification */ public void killNotification() { mService.stopForeground(true); mNotification = null; } /** * Changes the playback controls in and out of a paused state * * @param isPlaying * True if music is playing, false otherwise */ public void updatePlayState(final boolean isPlaying) { if (mNotification == null || mNotificationManager == null) { return; } if (mNotificationTemplate != null) { mNotificationTemplate.setImageViewResource(R.id.notification_base_play, isPlaying ? R.drawable.btn_playback_pause : R.drawable.btn_playback_play); } if (CommonUtils.hasJellyBean() && mExpandedView != null) { mExpandedView.setImageViewResource(R.id.notification_expanded_base_play, isPlaying ? R.drawable.btn_playback_pause : R.drawable.btn_playback_play); } mNotificationManager.notify(APOLLO_MUSIC_SERVICE, mNotification); } /** * Open to the now playing screen */ private PendingIntent getPendingIntent() { return PendingIntent.getActivity(mService, 0, new Intent("com.boko.vimusic.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(boolean isPlaying) { // 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, isPlaying ? R.drawable.btn_playback_pause : R.drawable.btn_playback_play); } /** * Lets the buttons in the remote view control playback in the normal layout */ private void initPlaybackActions(boolean isPlaying) { // 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, isPlaying ? R.drawable.btn_playback_pause : R.drawable.btn_playback_play); } /** * @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, MediaPlaybackService.class); switch (which) { case 1: // Play and pause action = new Intent(MediaPlaybackService.ACTION_PLAYER_TOGGLEPAUSE); action.setComponent(serviceName); pendingIntent = PendingIntent.getService(mService, 1, action, 0); return pendingIntent; case 2: // Skip tracks action = new Intent(MediaPlaybackService.ACTION_PLAYER_NEXT); action.setComponent(serviceName); pendingIntent = PendingIntent.getService(mService, 2, action, 0); return pendingIntent; case 3: // Previous tracks action = new Intent(MediaPlaybackService.ACTION_PLAYER_PREVIOUS); action.setComponent(serviceName); pendingIntent = PendingIntent.getService(mService, 3, action, 0); return pendingIntent; case 4: // Stop and collapse the notification action = new Intent(MediaPlaybackService.ACTION_PLAYER_STOP); 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); } }