Firebase:如何在Android应用中设置默认通知频道?

时间:2017-09-05 05:07:11

标签: android firebase firebase-cloud-messaging android-8.0-oreo

如何为应用在后台设置的通知消息设置默认通知渠道?默认情况下,这些消息使用" Miscellaneous"信道。

3 个答案:

答案 0 :(得分:25)

如您所见[{3}},您需要在应用程序组件的AndroidManifest.xml中添加以下元数据元素:

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

当通知消息没有指定频道,或者应用程序尚未创建提供的频道时,将使用此默认频道。

答案 1 :(得分:0)

您需要添加Cordova config.xml

<widget 
... 
xmlns:android="http://schemas.android.com/apk/res/android" 
...>



 <platform name="android">
    <config-file target="AndroidManifest.xml" parent="application" mode="merge">
      <meta-data android:name="com.google.firebase.messaging.default_notification_channel_id" android:value="@string/default_notification_channel_id"/>
    </config-file>
    <config-file target="res/values/strings.xml" parent="/*">
      <string name="default_notification_channel_id">urgent_alert</string>
    </config-file>
</platform>

答案 2 :(得分:0)

您需要使用 NotificationManager CreateNotificationChannel 注册频道。

此示例在 Xamarin 中使用 c#,但在其他地方广泛适用

private void ConfigureNotificationChannel()
{
    if (Build.VERSION.SdkInt < BuildVersionCodes.O)
    {
        // Notification channels are new in API 26 (and not a part of the
        // support library). There is no need to create a notification
        // channel on older versions of Android.
        return;
    }

    var channelId = Resources.GetString(Resource.String.default_notification_channel_id);
    var channelName = "Urgent";
    var importance = NotificationImportance.High;

    //This is the default channel and also appears in the manifest
    var chan = new NotificationChannel(channelId, channelName, importance);

    chan.EnableVibration(true);
    chan.LockscreenVisibility = NotificationVisibility.Public;

    var notificationManager = (NotificationManager)GetSystemService(NotificationService);
    notificationManager.CreateNotificationChannel(chan);

}

这个频道应该是独一无二的,例如com.mycompany.myapp.urgent

然后在 AndroidManifest.xml

中的 application 标记中添加对字符串的引用
<application android:label="MyApp" android:icon="@mipmap/icon">
    <meta-data android:name="com.google.firebase.messaging.default_notification_channel_id" android:value="@string/default_notification_channel_id" />
</application>

最后,在strings.xml

中设置字符串
<?xml version="1.0" encoding="UTF-8" ?>
<resources>
    <string name="default_notification_channel_id">com.mycompany.myapp.urgent</string>
</resources>