通知未在奥利奥(Oreo)中显示 [英] Notification not showing in Oreo

问题描述

Normal Notification Builder在Android O上不显示通知.

Normal Notification Builder doesn't show notifications on Android O.

如何在Android 8 Oreo上显示通知?

How could I show notification on Android 8 Oreo?

是否要添加新的代码以在Android O上显示通知?

Is there any new piece of code to add for showing notification on Android O?

推荐答案

在Android O中，必须在Notification Builder中使用频道

In Android O it's a must to use a channel with your Notification Builder

下面是示例代码:

// Sets an ID for the notification, so it can be updated.
int notifyID = 1; 
String CHANNEL_ID = "my_channel_01";// The id of the channel. 
CharSequence name = getString(R.string.channel_name);// The user-visible name of the channel.
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID, name, importance);
// Create a notification and set the notification channel.
Notification notification = new Notification.Builder(MainActivity.this)
            .setContentTitle("New Message")
            .setContentText("You've received new messages.")
            .setSmallIcon(R.drawable.ic_notify_status)
            .setChannelId(CHANNEL_ID)
            .build();

或具有以下处理兼容性:

Or with Handling compatibility by:

NotificationCompat notification =
        new NotificationCompat.Builder(this)
        .setSmallIcon(R.drawable.notification_icon)
        .setContentTitle("My notification")
        .setContentText("Hello World!")
        .setChannelId(CHANNEL_ID).build();



NotificationManager mNotificationManager =
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
 mNotificationManager.createNotificationChannel(mChannel);

// Issue the notification.
mNotificationManager.notify(notifyID , notification);

或者如果您想进行简单的修复，请使用以下代码:

or if you want a simple fix then use the following code:

NotificationManager mNotificationManager =
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
       mNotificationManager.createNotificationChannel(mChannel);
    }

更新: NotificationCompat.Builder参考

NotificationCompat.Builder(Context context)

此构造函数在API级别26.0.0中已弃用 所以你应该使用

This constructor was deprecated in API level 26.0.0 so you should use

Builder(Context context, String channelId)

因此无需使用新的构造函数setChannelId.

so no need to setChannelId with the new constructor.

您应该使用当前最新的AppCompat库26.0.2

And you should use the latest of AppCompat library currently 26.0.2

compile "com.android.support:appcompat-v7:26.0.+"

来自 YouTube上的Android开发者频道

此外，您可以查看官方Android文档

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