当应用程序在React Native中处于Kill状态时，不会出现Fcm通知

问题描述：

从FCM发送时，即React Native中的Firebase控制台很容易同时在iOS和Android中出现，但是当我从管理员或后端发送通知时，当应用程序处于kill状态时不会出现. 我正在使用react-native-fcm.

When sending from FCM i.e Firebase console in react native it is easily coming in iOS and Android both but when i am sending notification from admin or backend side it is not coming when app is in kill state. I am using react-native-fcm .

感谢.

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.VIBRATE"/>
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

<uses-sdk
    android:minSdkVersion="16"
    android:targetSdkVersion="22" />

<application
  android:name=".MainApplication"
  android:allowBackup="true"
  android:label="@string/app_name"
  android:icon="@mipmap/brainbg"
  android:theme="@style/AppTheme">
  <activity
    android:name=".MainActivity"
    android:label="@string/app_name"
    android:launchMode="singleTop"
    android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
    android:windowSoftInputMode="adjustResize"
    android:screenOrientation="portrait"  >
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
  </activity>
  <activity android:name="com.facebook.react.devsupport.DevSettingsActivity" />


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

  <service android:name="com.evollu.react.fcm.InstanceIdService" android:exported="false">
    <intent-filter>
      <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
    </intent-filter>
  </service>


  <receiver android:name="com.evollu.react.fcm.FIRLocalMessagingPublisher"/>
    <receiver android:enabled="true" android:exported="true"  android:name="com.evollu.react.fcm.FIRSystemBootEventReceiver">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED"/>
            <action android:name="android.intent.action.QUICKBOOT_POWERON"/>
            <action android:name="com.htc.intent.action.QUICKBOOT_POWERON"/>
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </receiver>

</application>

答

我遇到了同样的问题，在收到fcm令牌后，通过添加以下代码解决了该问题

I had the same issue, resolved it by adding the code below after receiving the fcm token,

FCM.setBadgeNumber(0);

以上是适用于iOS的android系统，您需要在Xcode中打开后台通知.在Xcode中选择您的项目并打开功能，然后查看是否启用了背景模式.请参阅屏幕截图

Above is for android for iOS you need to turn on background notifications in Xcode. In Xcode select your project and open capabilities and see if background modes in on. Refer to the screenshot

这是我使用的代码的片段

Here is the snippet of the code i used

export const MyNotificationReceiver = props => {
  FCM.getInitialNotification().then(notif => {
  });

  FCM.setBadgeNumber(0); //Add this for background notification

  this.notificationListener = FCM.on(FCMEvent.Notification, async notif => {
    var notification_messgae = "";
    try {
      notification_messgae = notif.default;
    } catch (error) {
      notification_messgae = JSON.stringify(notif);
    }
    if (osDetection) {
      switch (notif._notificationType) {
        case NotificationType.Remote:
          notif.finish(RemoteNotificationResult.NewData) //other types available: RemoteNotificationResult.NewData, RemoteNotificationResult.ResultFailed
          break;
        case NotificationType.NotificationResponse:
          notif.finish();
          break;
        case NotificationType.WillPresent:
          notif.finish(WillPresentNotificationResult.All) //other types available: WillPresentNotificationResult.None
          break;
      }
    }
    if (!osDetection()) {
      if(notif.default)
      {
        FCM.presentLocalNotification({
          body: notif.default,
          priority: "high",
          show_in_foreground: true,
          large_icon: "noti_icon",                           // Android only
          icon: "noti_icon",                                // as FCM payload, you can relace this with custom icon you put in mipmap
          android_actions: JSON.stringify([{
            id: "view",
            title: 'view'
          }, {
            id: "dismiss",
            title: 'dismiss'
          }]) // for android, take syntax similar to ios's. only buttons are supported
        });
       }

    }
  });
};

当应用程序在React Native中处于Kill状态时，不会出现Fcm通知

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