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Android O(8.0)Notification Channel使用姿势

2018.05.14 14:11 9587浏览

NotificationGroup通知渠道组示意图.png

上面这张图,将具有形同形态,相同表现形式的通知渠道A ,通知渠道B归纳到了同一个渠道组中。

  1. 通知渠道的引入可以很方便的管理,和归纳同一种类型的通知Notification.
  2. 通知渠道组的引入同样可以方便的管理,归纳同一种类型的通知渠道Channel.

1.首先看一下Android8.0之前的普通Notification的样式以及使用姿势

普通多个notification.png

  1. 可以看到是多个通知 ,无论是不是同一个应用的通知,逐个排列下来,占满了屏幕,不太友好
  2. 接下来我们来看一下代码

    NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getApplicationContext(), CHANNEL_ID)
                .setSmallIcon(android.R.drawable.stat_notify_chat)
                .setContentTitle("你有一条新的消息")
                .setContentText("this is normal notification style")
                .setTicker("notification ticker")
                .setPriority(1000)
                .setAutoCancel(true)
                .setVibrate(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400})
                .setNumber(3)
                .setDefaults(Notification.DEFAULT_SOUND | Notification.DEFAULT_VIBRATE)
                .setContentIntent(pendingResult)
                .setOngoing(true);
    
        Notification notification = mBuilder.build();
        getNotificationManager().notify(notifyId, notification);

    2.再来看一下带下载进度的通知栏Notification

    带下载进度Notification.png

  3. 起一个线程来模拟 下载进度,间隔1秒更新一下 通知进度。
    final NotificationManager mNotifyManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        final NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this, CHANNEL_ID);
        mBuilder.setContentTitle("Picture Download")
                .setContentText("Download in progress")
                .setOngoing(true)
                .setVibrate(new long[]{0})
                .setSound(null)
                .setTicker("notification ticker")
                .setDefaults(NotificationCompat.FLAG_LOCAL_ONLY)
                .setSmallIcon(android.R.drawable.stat_notify_chat);
        new Thread(
                new Runnable() {
                    @Override
                    public void run() {
                        int incr;
                        for (incr = 0; incr <= 100; incr += 5) {
                            mBuilder.setProgress(100, incr, false);
                            mBuilder.setSound(null);
                            mNotifyManager.notify(0, mBuilder.build());
                            try {
                                Thread.sleep(1000);
                            } catch (InterruptedException e) {
                            }
                        }
                        mBuilder.setContentText("Download complete").setProgress(0, 0, false);
                        mBuilder.setAutoCancel(true);
                        mBuilder.setOngoing(false);
                        mNotifyManager.notify(0, mBuilder.build());
                    }
                }
        ).start();

    3.再来看一下自定义布局的Notification

    自定义布局Notification.png

  4. 创建一个布局资源,通过RemoteViews来 渲染,同时也绑定了点击事件

    
    RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.remote_custom_notification);
        remoteViews.setTextViewText(R.id.title, "Custom Notification---title");
        remoteViews.setTextViewText(R.id.content, "Custom Notification---content");
    
        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
        intent.setType("image/*");
        intent.addCategory(Intent.CATEGORY_OPENABLE);
    
        PendingIntent pendingIntent = PendingIntent.getActivity(this, REQUEST_CODE_NOTIFY, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        Notification notification = new NotificationCompat.Builder(this, CHANNEL_ID)
                .setSmallIcon(android.R.drawable.stat_notify_chat)
                .setContent(remoteViews)
                .setTicker("ticker")
                .setContentIntent(pendingIntent).build();
    
        getNotificationManager().notify(notifyId, notification);
以上【1】【2】【3】就是常用的通知栏Notification的样式和使用姿势
- - -
### 4.下面来看一下Android 8.0上通知渠道NotificationChannel 的应用
![NotificationChannel.png](http://upload-images.jianshu.io/upload_images/2432544-88f3f7a653560051.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

1. 上图可以看到,相同通知渠道的通知已经被合并,而不是一一全部展开。
2.  如果你的项目TargetSDK在26以上,那么你在使用Notification的时候必须指定一个ChannelId,否则当然会报错
3. 下面是Android 8.0上通知渠道NotificationChannel 的使用代码段,注意点需要传入CHANNEL_ID(随意指定),CHANNEL_NAME(随意指定)

NotificationChannel channel = new NotificationChannel(CHANNEL_ID, CHANNEL_NAME, NotificationManager.IMPORTANCE_HIGH);
channel.setBypassDnd(true); //设置绕过免打扰模式
channel.canBypassDnd(); //检测是否绕过免打扰模式
channel.setLockscreenVisibility(Notification.VISIBILITY_SECRET);//设置在锁屏界面上显示这条通知
channel.setDescription("description of this notification");
channel.setLightColor(Color.GREEN);
channel.setName("name of this notification");
channel.setShowBadge(true);
channel.setVibrationPattern(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400});
channel.enableVibration(true);
getNotificationManager().createNotificationChannel(channel);

- - -
### 5.如果要使用通知渠道组NotificationChannelGroup,那么它的样式跟上图一样,使用姿势是下面这样
1.  这里在渠道组NotificationChannelGroup上绑定了两个通知渠道NotificationChannel ,每个渠道下各有一个通知Notification.

getNotificationManager().createNotificationChannelGroup(new NotificationChannelGroup(GROUP_ID, "GROUP_CHANNEL"));

    NotificationChannel channel = new NotificationChannel(CHANNEL_ID, CHANNEL_NAME, NotificationManager.IMPORTANCE_HIGH);
    channel.setGroup(GROUP_ID);
    channel.setShowBadge(true);
    channel.setLightColor(Color.RED);
    channel.enableLights(true);
    getNotificationManager().createNotificationChannel(channel);

    NotificationChannel channel2 = new NotificationChannel(CHANNEL_ID_2, CHANNEL_NAME, NotificationManager.IMPORTANCE_HIGH);
    channel2.setGroup(GROUP_ID);
    channel2.setShowBadge(true);
    channel2.setLightColor(Color.RED);
    channel2.enableLights(true);
    getNotificationManager().createNotificationChannel(channel2);

    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("image/*");
    intent.addCategory(Intent.CATEGORY_OPENABLE);
    PendingIntent pendingResult = PendingIntent.getActivity(this, REQUEST_CODE_NOTIFY, intent, PendingIntent.FLAG_UPDATE_CURRENT);

    NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getApplicationContext(), CHANNEL_ID)
            .setSmallIcon(android.R.drawable.stat_notify_chat)
            .setContentTitle("notification title_9")
            .setContentText("notification content_9")
            .setPriority(1000)
            .setAutoCancel(true)
            .setVibrate(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400})
            .setNumber(3)
            .setDefaults(Notification.DEFAULT_LIGHTS)
            .setContentIntent(pendingResult)
            .setOngoing(true);

    NotificationCompat.Builder mBuilder1 = new NotificationCompat.Builder(getApplicationContext(), CHANNEL_ID_2)
            .setSmallIcon(android.R.drawable.stat_notify_chat)
            .setContentTitle("notification title_10")
            .setContentText("notification content_10")
            .setPriority(1000)
            .setAutoCancel(true)
            .setVibrate(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400})
            .setNumber(15)
            .setDefaults(Notification.DEFAULT_SOUND | Notification.DEFAULT_VIBRATE)
            .setContentIntent(pendingResult)
            .setOngoing(true);

    getNotificationManager().notify(9, mBuilder.build());
    getNotificationManager().notify(10, mBuilder1.build());
- - -
### 6.通知渠道的管理
1.删除渠道

getNotificationManager().deleteNotificationChannel(CHANNEL_ID);


2.删除渠道组

getNotificationManager().deleteNotificationChannelGroup(GROUP_ID);


以上便是老版本上使用Notification 和 Android 8.0上通知渠道,渠道组的姿势。
- - -
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本文原创发布于慕课网 ,转载请注明出处,谢谢合作

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