com.gecq.musicwave.player.NotificationHelper.java Source code

Java tutorial

Introduction

Here is the source code for com.gecq.musicwave.player.NotificationHelper.java

Source

/*
 * 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.gecq.musicwave.player;

import com.gecq.musicwave.R;
import com.gecq.musicwave.utils.CommonUtils;

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.widget.RemoteViews;

/**
 * Builds the notification for Apollo's service. Jelly Bean and higher uses the
 * expanded notification by default.
 *
 * @author Andrew Neal (andrewdneal@gmail.com)
 */
public class NotificationHelper {

    /**
     * Notification ID
     */
    private static final int MUSIC_WAVE_SERVICE = 1;

    /**
     * NotificationManager
     */
    private final NotificationManager mNotificationManager;

    /**
     * Context
     */
    private final PlayerService 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 PlayerService service) {
        mService = service;
        mNotificationManager = (NotificationManager) service.getSystemService(Context.NOTIFICATION_SERVICE);
    }

    /**
     * Call this to build the {@link Notification}.
     */
    @SuppressLint("NewApi")
    public void buildNotification(final String albumName, final String artistName, final String trackName,
            final Long 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.notification_icon)
                .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(MUSIC_WAVE_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(MUSIC_WAVE_SERVICE, mNotification);
    }

    /**
     * Open to the now playing screen
     */
    private PendingIntent getPendingIntent() {
        Intent notificationIntent = new Intent("com.gecq.musicwave.MUSIC_PLAYER");
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        return PendingIntent.getActivity(mService, 0, notificationIntent, 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, PlayerService.class);
        switch (which) {
        case 1:
            // Play and pause
            action = new Intent(PlayerService.TOGGLEPAUSE_ACTION);
            action.setComponent(serviceName);
            pendingIntent = PendingIntent.getService(mService, 1, action, 0);
            return pendingIntent;
        case 2:
            // Skip tracks
            action = new Intent(PlayerService.NEXT_ACTION);
            action.setComponent(serviceName);
            pendingIntent = PendingIntent.getService(mService, 2, action, 0);
            return pendingIntent;
        case 3:
            // Previous tracks
            action = new Intent(PlayerService.PREVIOUS_ACTION);
            action.setComponent(serviceName);
            pendingIntent = PendingIntent.getService(mService, 3, action, 0);
            return pendingIntent;
        case 4:
            // Stop and collapse the notification
            action = new Intent(PlayerService.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);
    }

}