Firebase推送通知不适用于API 28

时间:2019-01-26 09:56:55

标签: android firebase push-notification firebase-cloud-messaging

我正在设置Firebase推送通知,并且根据文档,我做了我猜得到的一切

所以我所做的是从“工具”>“ Firebase”>“云消息传递”中添加的依赖项,看到我的收获

implementation 'com.google.firebase:firebase-core:11.8.0'
implementation 'com.google.firebase:firebase-messaging:11.8.0'
implementation 'com.google.android.gms:play-services-ads:11.8.0'

此后,我创建了一个MyyFirebaseMessagingService类并扩展了FirebaseMessagingService,请参见下文

public class MyFirebaseMessagingService extends FirebaseMessagingService {
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    super.onMessageReceived(remoteMessage);

    Log.d("RefreshedToken", "onMessageReceived: " + remoteMessage.getNotification().getBody());
    showNotification(remoteMessage.getNotification().getBody());
}

private void showNotification(String message) {
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, new Intent(this, MainActivity.class), 0);
    Notification notification = new Notification.Builder(this)
            .setSmallIcon(R.drawable.logo)
            .setContentTitle("Quotes App")
            .setContentText(message)
            .setContentIntent(pendingIntent)
            .setAutoCancel(true)
            .build();

    NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
    notificationManager.notify(0, notification);
}}

此后,我在清单中添加了服务

<service
        android:name=".MyFirebaseMessagingService"
        android:enabled="true"
        android:exported="true"
        >
        <intent-filter>
            <action android:name="com.google.firebase.MESSAGING_EVENT"/>
        </intent-filter>
  </service>

现在,当我尝试发送通知时,我没有收到通知。我在做什么错

2 个答案:

答案 0 :(得分:2)

  
    

创建频道并设置重要性

  
     

在可以在Android 8.0及更高版本上发布通知之前,您必须   必须通过以下方式在系统中注册您的应用的通知频道   将NotificationChannel的实例传递给   createNotificationChannel()。

正如documentation所说,您需要在android 8及更高版本中添加一个通知通道,以便系统显示您的通知。

private void createNotificationChannel() {
    // Create the NotificationChannel, but only on API 26+ because
    // the NotificationChannel class is new and not in the support library
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        CharSequence name = getString(R.string.channel_name);
        String description = getString(R.string.channel_description);
        int importance = NotificationManager.IMPORTANCE_DEFAULT;
        NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, importance);
        channel.setDescription(description);
        // Register the channel with the system; you can't change the importance
        // or other notification behaviors after this
        NotificationManager notificationManager = getSystemService(NotificationManager.class);
        notificationManager.createNotificationChannel(channel);
    }
}

答案 1 :(得分:1)

  1. 首先,您需要创建通知频道...并且频道ID应该在1到10之间。

  2. 其次,升级到app / gradle.build

  3. 中的库的最新版本。
  4. 如果应用位于前台(用户可见),则会调用onMessageReceived()

  5. 如果应用程序在后台(用户不可见),则不会调用onMessageReceived()并且通知会自动显示给用户,而无需您手动显示它们...并且数据值是在点击时作为意图的额外内容传递给您的启动器活动。

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