Fixed typo in error message

android/build.gradle

@@ -2,7 +2,7 @@ group 'com.baseflow.permissionhandler'
 version '1.0-SNAPSHOT'
 
 buildscript {
-    ext.kotlin_version = '1.1.51'
+    ext.kotlin_version = '1.2.51'
     repositories {
         google()
         jcenter()

android/src/main/kotlin/com/baseflow/permissionhandler/PermissionHandlerPlugin.kt

@@ -99,7 +99,7 @@ class PermissionHandlerPlugin(private val registrar: Registrar, private var requ
             call.method == "requestPermissions" -> {
                 if (mResult != null) {
                     result.error(
-                            "ERROR_ALREADY_REQUESTED_PERMISSIONS",
+                            "ERROR_ALREADY_REQUESTING_PERMISSIONS",
                             "A request for permissions is already running, please wait for it to finish before doing another request (note that you can request multiple permissions at the same time).",
                             null)
                 }

ios/Classes/SwiftPermissionHandlerPlugin.swift

@@ -19,15 +19,17 @@ public class SwiftPermissionHandlerPlugin: NSObject, FlutterPlugin {
 
     public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
         if call.method == "checkPermissionStatus" {
+            let permission: PermissionGroup = Codec.decodePermissionGroup(from: call.arguments)
+
             PermissionManager.checkPermissionStatus(
-                permission: Codec.decodePermissionGroup(
-                    from: call.arguments),
-                    result: result)
+                permission: permission,
+                result: result)
         } else if call.method == "requestPermissions" {
+            let permissions: [PermissionGroup] = Codec.decodePermissionGroups(from: call.arguments)
+
             _permissionManager.requestPermission(
-                permissions: Codec.decodePermissionGroups(
-                    from: call.arguments),
-                    result: result)
+                permissions: permissions,
+                result: result)
         } else if call.method == "shouldShowRequestPermissionRationale" {
             result(false)
         } else if call.method == "openAppSettings" {

lib/permission_handler.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:io';
 
 import 'package:flutter/services.dart';
 import 'package:permission_handler/permission_enums.dart';
@@ -44,6 +45,11 @@ class PermissionHandler {
   /// returns [false].
   static Future<bool> shouldShowRequestPermissionRationale(
       PermissionGroup permission) async {
+
+    if (!Platform.isAndroid) { 
+      return false;
+    }
+
     final bool shouldShowRationale = await _channel.invokeMethod(
         'shouldShowRequestPermissionRationale',
         Codec.encodePermissionGroup(permission));