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。
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>