Question

我正在使用Android O模拟器并希望从Firebase控制台获取通知。除了Android O之外，它在每个设备上都能正常工作。我在日志中收到此错误。

W/Notification: Use of stream types is deprecated for operations other than volume control
W/Notification: See the documentation of setSound() for what to use instead with android.media.AudioAttributes to qualify your playback use case

我知道我必须为此指定频道ID。那么到目前为止我做了什么

的AndroidManifest.xml

     <application
            android:allowBackup="true"
            android:icon="@mipmap/ic_launcher"
            android:label="@string/app_name"
            android:largeHeap="true"
            android:roundIcon="@mipmap/ic_launcher_round"
            android:supportsRtl="true"
            android:theme="@style/AppTheme">

            <meta-data
                android:name="com.google.firebase.messaging.default_notification_icon"
                android:resource="@drawable/attach" />


            <meta-data
                android:name="com.google.firebase.messaging.default_notification_color"
                android:resource="@color/colorAccent" />

            <meta-data
                android:name="com.google.firebase.messaging.default_notification_channel_id"
                android:value="my_notification_channel" />

            <service android:name=".Helper.FirebaseIDService">
                <intent-filter>
                    <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
                </intent-filter>
            </service>

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

       <my all activities...>

我还在 FirebaseMessagingService 中指定了频道ID

 public class MyFirebaseMessagingService extends FirebaseMessagingService {
    private static final String TAG = "FCM Service";
    private static final int NOTIFICATION_ID = 1;
    private static final String NOTIFICATION_CHANNEL_ID = "my_notification_channel";

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {

        Log.d(TAG, "From: " + remoteMessage.getFrom());
        Log.d(TAG, "Notification Message Body: " + remoteMessage.getNotification().getBody());

NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "My Notifications", NotificationManager.IMPORTANCE_DEFAULT);

            // Configure the notification channel.
            notificationChannel.setDescription("Channel description");
            notificationChannel.enableLights(true);
            notificationChannel.setLightColor(Color.RED);
            notificationChannel.setVibrationPattern(new long[]{0, 1000, 500, 1000});
            notificationChannel.enableVibration(true);
            notificationManager.createNotificationChannel(notificationChannel);
        }


        NotificationCompat.Builder mBuilder;
        mBuilder = new NotificationCompat.Builder(getApplicationContext())
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle("Title")
                .setContentText(remoteMessage.getNotification().getBody())
                .setOngoing(true)
                .setChannelId(NOTIFICATION_CHANNEL_ID);

        notificationManager.notify(NOTIFICATION_ID, mBuilder.build());
 }
}

所以做完这一切之后。我仍然在日志中收到该错误消息，并且无法从控制台接收通知。任何帮助都会很明显。

Answer 1

当FCM邮件不包含数据有效内容，仅包含通知有效内容且您的应用位于后台时，Firebase会直接生成通知，而不会调用onMessageReceived()。这在the documentation中解释。

对于Android O，必须创建通知渠道。您正在清单中正确定义默认通知渠道，但渠道是在onMessageReceived()代码中创建的，当应用程序在后台时，该代码无法执行。

将创建频道的代码移动到您可以确定它将在收到通知之前执行的位置。

此外，如Firebase Release Notes所示，版本10.2.6中添加了对通知渠道的支持。您必须至少使用该版本构建。

Firebase通知无法在Android O上运行

1 个答案: