Combine initNotificationChannel() and setUpUpdateNotificationChannel() into a single method.

app/src/main/java/org/schabi/newpipe/App.java

@@ -1,6 +1,5 @@
 package org.schabi.newpipe;
 
-import android.annotation.TargetApi;
 import android.app.Application;
 import android.app.NotificationChannel;
 import android.app.NotificationManager;
@@ -33,6 +32,7 @@ import org.schabi.newpipe.util.StateSaver;
 import java.io.IOException;
 import java.io.InterruptedIOException;
 import java.net.SocketException;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
@@ -90,7 +90,7 @@ public class App extends Application {
         Localization.init(getApplicationContext());
 
         StateSaver.init(this);
-        initNotificationChannel();
+        initNotificationChannels();
 
         ServiceHelper.initServices(this);
 
@@ -219,48 +219,31 @@ public class App extends Application {
         }
     }
 
-    public void initNotificationChannel() {
+    private void initNotificationChannels() {
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
             return;
         }
 
-        final String id = getString(R.string.notification_channel_id);
-        final CharSequence name = getString(R.string.notification_channel_name);
-        final String description = getString(R.string.notification_channel_description);
+        String id = getString(R.string.notification_channel_id);
+        String name = getString(R.string.notification_channel_name);
+        String description = getString(R.string.notification_channel_description);
 
         // Keep this below DEFAULT to avoid making noise on every notification update
         final int importance = NotificationManager.IMPORTANCE_LOW;
 
-        final NotificationChannel mChannel = new NotificationChannel(id, name, importance);
-        mChannel.setDescription(description);
+        final NotificationChannel mainChannel = new NotificationChannel(id, name, importance);
+        mainChannel.setDescription(description);
 
-        final NotificationManager mNotificationManager = getSystemService(NotificationManager.class);
-        mNotificationManager.createNotificationChannel(mChannel);
+        id = getString(R.string.app_update_notification_channel_id);
+        name = getString(R.string.app_update_notification_channel_name);
+        description = getString(R.string.app_update_notification_channel_description);
 
-        setUpUpdateNotificationChannel(importance);
-    }
+        final NotificationChannel appUpdateChannel = new NotificationChannel(id, name, importance);
+        appUpdateChannel.setDescription(description);
 
-    /**
-     * Set up notification channel for app update.
-     *
-     * @param importance
-     */
-    @TargetApi(Build.VERSION_CODES.O)
-    private void setUpUpdateNotificationChannel(final int importance) {
-        final String appUpdateId
-                = getString(R.string.app_update_notification_channel_id);
-        final CharSequence appUpdateName
-                = getString(R.string.app_update_notification_channel_name);
-        final String appUpdateDescription
-                = getString(R.string.app_update_notification_channel_description);
-
-        final NotificationChannel appUpdateChannel
-                = new NotificationChannel(appUpdateId, appUpdateName, importance);
-        appUpdateChannel.setDescription(appUpdateDescription);
-
-        final NotificationManager appUpdateNotificationManager
-                = getSystemService(NotificationManager.class);
-        appUpdateNotificationManager.createNotificationChannel(appUpdateChannel);
+        final NotificationManager notificationManager = getSystemService(NotificationManager.class);
+        notificationManager.createNotificationChannels(Arrays.asList(mainChannel,
+                appUpdateChannel));
     }
 
     protected boolean isDisposedRxExceptionsReported() {

checkstyle-suppressions.xml

@@ -15,10 +15,6 @@
       files="ListHelper.java"
       lines="282,314"/>
 
-  <suppress checks="LineLength"
-      files="App.java"
-      lines="237"/>
-
   <!-- org.schabi.newpipe.streams -->
   <suppress checks="LineLength"
       files="WebMWriter.java"