fix example

Examples/simple-fcm-client/app/App.js

@@ -10,7 +10,8 @@ import {
   Text,
   TouchableOpacity,
   View,
-  Clipboard
+  Clipboard,
+  Platform
 } from 'react-native';
 
 import FCM from "react-native-fcm";
@@ -157,15 +158,15 @@ export default class App extends Component {
           Remote notif won't be available to iOS emulators
         </Text>
 
-        <TouchableOpacity onPress={() => firebaseClient.sendRemoteNotification(token)} style={styles.button}>
+        <TouchableOpacity onPress={() => this.sendRemoteNotification(token)} style={styles.button}>
           <Text style={styles.buttonText}>Send Remote Notification</Text>
         </TouchableOpacity>
 
-        <TouchableOpacity onPress={() => firebaseClient.sendRemoteData(token)} style={styles.button}>
+        <TouchableOpacity onPress={() => this.sendRemoteData(token)} style={styles.button}>
           <Text style={styles.buttonText}>Send Remote Data</Text>
         </TouchableOpacity>
 
-        <TouchableOpacity onPress={() => firebaseClient.sendRemoteNotificationWithData(token)} style={styles.button}>
+        <TouchableOpacity onPress={() => this.sendRemoteNotificationWithData(token)} style={styles.button}>
           <Text style={styles.buttonText}>Send Remote Notification With Data</Text>
         </TouchableOpacity>
 

Examples/simple-fcm-client/app/FirebaseClient.js

 import FirebaseConstants from "./FirebaseConstants";
-import { Platform, Alert } from "react-native";
+import { Alert } from "react-native";
 
 const API_URL = "https://fcm.googleapis.com/fcm/send";
 
 class FirebaseClient {
 
-  constructor() {
-    this.sendData = this.sendData.bind(this);
-    this.sendNotification = this.sendNotification.bind(this);
-    this.sendNotificationWithData = this.sendNotificationWithData.bind(this);
-  }
-
   async send(body, type) {
 		if(FirebaseClient.KEY === 'YOUR_API_KEY'){
 			Alert.alert('Set your API_KEY in app/FirebaseConstants.js')