Support for Android O Notification Channels

Author: pushy

Diff for: receiver/src/android/PushReceiver.java

@@ -1,12 +1,17 @@
 package me.pushy.sdk;
 
+import android.os.Build;
 import android.app.Notification;
 import android.app.PendingIntent;
 import android.content.Intent;
 import android.content.Context;
 import android.media.RingtoneManager;
 import android.app.NotificationManager;
 import android.content.BroadcastReceiver;
+import android.util.Log;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Method;
 
 public class PushReceiver extends BroadcastReceiver {
     @Override
@@ -33,6 +38,11 @@ public void onReceive(Context context, Intent intent) {
         // Get an instance of the NotificationManager service
         NotificationManager notificationManager = (NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);
 
+        // Device is Android O or newer?
+        if (Build.VERSION.SDK_INT >= 26) {
+            configureNotificationChannel(builder, notificationManager);
+        }
+
         // Build the notification and display it
         notificationManager.notify(1, builder.build());
     }
@@ -52,4 +62,42 @@ private PendingIntent getMainActivityPendingIntent(Context context) {
         // Convert intent into pending intent
         return PendingIntent.getActivity(context, 0, launchIntent, PendingIntent.FLAG_UPDATE_CURRENT);
     }
+
+    private void configureNotificationChannel(Notification.Builder builder, NotificationManager notificationManager) {
+        // Channel details
+        String channelId = "pushy";
+        String channelName = "Push Notifications";
+
+        // Channel importance (4 means high importance)
+        int channelImportance = 4;
+
+        try {
+            // Get NotificationChannel class via reflection (only available on API level 26+)
+            Class notificationChannelClass = Class.forName("android.app.NotificationChannel");
+
+            // Get NotificationChannel constructor
+            Constructor<?> notificationChannelConstructor = notificationChannelClass.getDeclaredConstructor(String.class, CharSequence.class, int.class);
+
+            // Instantiate new notification channel
+            Object notificationChannel = notificationChannelConstructor.newInstance(channelId, channelName, channelImportance);
+
+            // Get notification channel creation method via reflection
+            Method createNotificationChannelMethod = notificationManager.getClass().getDeclaredMethod("createNotificationChannel", notificationChannelClass);
+
+            // Invoke method on NotificationManager, passing in the channel object
+            createNotificationChannelMethod.invoke(notificationManager, notificationChannel);
+
+            // Get "setChannelId" method for Notification.Builder (only for AppCompat v26+)
+            Method setChannelIdMethod = builder.getClass().getDeclaredMethod("setChannelId", String.class);
+
+            // Invoke method, passing in the channel ID
+            setChannelIdMethod.invoke(builder, channelId);
+
+            // Log success to console
+            Log.d("Pushy", "Notification channel set successfully");
+        } catch (Exception exc) {
+            // Log exception to console
+            Log.e("Pushy", "Creating notification channel failed", exc);
+        }
+    }
 }