Support detection of blocked channel for Android/Oreo+

android/src/main/java/com/dieam/reactnativepushnotification/modules/RNPushNotification.java

@@ -9,6 +9,11 @@
 import android.content.IntentFilter;
 import android.os.Bundle;
 import androidx.core.app.NotificationManagerCompat;
+import android.support.annotation.RequiresApi;
+import android.annotation.TargetApi;
+import android.app.NotificationChannel;
+import android.os.Build;
+
 
 import com.dieam.reactnativepushnotification.helpers.ApplicationBadgeHelper;
 import com.facebook.react.bridge.ActivityEventListener;
@@ -25,6 +30,7 @@
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Random;
+import java.util.List;
 
 import android.util.Log;
 
@@ -228,4 +234,18 @@ public void clearLocalNotification(int notificationID) {
     public void registerNotificationActions(ReadableArray actions) {
         registerNotificationsReceiveNotificationActions(actions);
     }
+
+    @TargetApi(Build.VERSION_CODES.O)
+    @RequiresApi(api = Build.VERSION_CODES.O)
+    @ReactMethod
+    public void isChannelBlocked(String senderID, Promise promise) {
+        ReactContext reactContext = getReactApplicationContext();
+
+        NotificationManager notificationManager =
+                (NotificationManager) reactContext.getSystemService(reactContext.NOTIFICATION_SERVICE);
+        NotificationChannel notificationChannel = notificationManager.getNotificationChannel(senderID);
+        Boolean isBlocked = (notificationChannel.getImportance() == NotificationManager.IMPORTANCE_NONE);
+
+        promise.resolve(isBlocked);
+    }
 }

component/index.android.js

@@ -116,6 +116,14 @@ NotificationsComponent.prototype.clearAllNotifications = function() {
 	RNPushNotification.clearAllNotifications()
 }
 
+NotificationsComponent.prototype.isChannelBlocked = function(channelId: string, handler: Function) {
+	RNPushNotification.isChannelBlocked(channelId).then(isBlocked => {
+    callback(isBlocked)
+  }).catch(error => {
+    handler(null, error)
+  });
+};
+
 module.exports = {
 	state: false,
 	component: new NotificationsComponent()

index.js

@@ -331,4 +331,8 @@ Notifications.clearAllNotifications = function() {
 	return this.callNative('clearAllNotifications', arguments)
 }
 
+Notifications.isChannelBlocked = function() {
+	return this.callNative('isChannelBlocked', arguments);
+};
+
 module.exports = Notifications;