Android学习笔记之Notification

一、需求

• 自定义通知栏
• 适配 Android 8.0
• 按钮点击事件

二、代码

2.1 通知栏的代码

/**
 * 构造通知栏参数
 */
private void createNotificationConfig() {
    String ID = "xxx";    //这里的 id 里面输入自己的项目的包的路径
    String NAME = "xxx"; // 用于 channel 的名称

    // 获取通知的实例
    NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    NotificationCompat.Builder notificationBuilder; //创建服务对象
    // 判断版本，当大于Android 8.0时，需要创建通知渠道 channel
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        NotificationChannel channel = new NotificationChannel(ID, NAME, manager.IMPORTANCE_HIGH);
        channel.enableLights(true);
        channel.setShowBadge(true);
        channel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
        manager.createNotificationChannel(channel);
        notificationBuilder = new NotificationCompat.Builder(TrackService.this).setChannelId(ID);
    } else {
        notificationBuilder = new NotificationCompat.Builder(TrackService.this);
    }
    // 使用Builder构造一个notification对象
    notificationBuilder.setContent(getRemoteView())
            .setOngoing(true)
            .setWhen(System.currentTimeMillis()) // 设置通知被创建的时间
            .setSmallIcon(R.drawable.ic_svg_stop_track) // 小图标
            .setTicker("通知来了")
            .setPriority(Notification.PRIORITY_MAX)
            .setContentIntent(PendingIntent.getBroadcast(this, 2,
                    new Intent("android.songsong.view"), PendingIntent.FLAG_UPDATE_CURRENT));
    manager.notify(100, notificationBuilder.build());

2.2 自定义通知栏样式

/**
 * 构建自定义通知栏的样式
 * @return RemoteViews
 */
private RemoteViews getRemoteView() {
    RemoteViews remoteView = new RemoteViews(getPackageName(), R.layout.notification_track_record_view);
    remoteView.setTextViewText(R.id.notification_title_id, "songsong");
    remoteView.setTextViewText(R.id.notification_track_id, "songsong-track");
    remoteView.setOnClickPendingIntent(R.id.notification_track_stop_id,
            getBroadcastStopPendingIntent(11)); // 点击事件的意图
    remoteView.setOnClickPendingIntent(R.id.notification_layout,
            getTrackActivityPendingIntent(12)); // 点击事件的意图
    return remoteView;
}
/**
 * 构建 点击按钮返回的事件
 * @param what 标记符
 * @return PendingIntent
 */
private PendingIntent getBroadcastStopPendingIntent(int what) {
    Intent i = new Intent("android.songsong.stop");
    PendingIntent stopPendingIntent = PendingIntent.getBroadcast(this, what, i, PendingIntent.FLAG_UPDATE_CURRENT);
    return stopPendingIntent;
}
/**
 * 构建点击layout返回的事件
 * @param what
 * @return
 */
private PendingIntent getTrackActivityPendingIntent(int what) {
    Intent i = new Intent("android.songsong.view");
    PendingIntent actionPendingIntent = PendingIntent.getBroadcast(this, what, i, PendingIntent.FLAG_UPDATE_CURRENT);
    return actionPendingIntent;
}

2.3 广播监听器

onCreate() 中执行 registerReceiver(this) 广播的注册

/**
 * 注册广播
 * @param context
 */
private void registerReceiver(Context context) {
    if (mMyBroadcastReceiver == null) {
        mMyBroadcastReceiver = new MyBroadcastReceiver();
    }
    if (mIntentFilterStop == null) {
        mIntentFilterStop = new IntentFilter("android.songsong.stop");
    }
    if (mIntentFilterView == null) {
        mIntentFilterView = new IntentFilter("android.songsong.view");
    }
    registerReceiver(mMyBroadcastReceiver, mIntentFilterStop);
    registerReceiver(mMyBroadcastReceiver, mIntentFilterView);
}
/**
 * 广播接收器
 */
class MyBroadcastReceiver extends BroadcastReceiver {
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        collapseStatusBar(context);
        if (action.equals("android.songsong.stop")) {
            L.v("SONGSONG");
        }
    }
}

// 需要申请权限
<uses-permission android:name="android.permission.EXPAND_STATUS_BAR"/>

/**
 * 收起通知栏
 * @param context
 */
public void collapseStatusBar(Context context) {
    try {
        Object statusBarManager = context.getSystemService("statusbar");
        Method collapse;
        if (Build.VERSION.SDK_INT <= 16) {
            collapse = statusBarManager.getClass().getMethod("collapse");
        } else {
            collapse = statusBarManager.getClass().getMethod("collapsePanels");
        }
        collapse.invoke(statusBarManager);
    } catch (Exception localException) {
        localException.printStackTrace();
    }
}

三、参考文章

• https://www.cnblogs.com/suliang-com/p/7089151.html
• https://blog.csdn.net/weixin_33929779/article/details/117622172