update example

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

@@ -66,7 +66,7 @@ class MainPage extends Component {
 
   showLocalNotification() {
     FCM.presentLocalNotification({
-      id: "UNIQ_ID_STRING",                               // (optional for instant notification)
+      id: new Date().valueOf().toString(),                // (optional for instant notification)
       title: "Test Notification with action",             // as FCM payload
       body: "Force touch to reply",                       // as FCM payload (required)
       sound: "bell.mp3",                                  // "default" or filename

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

@@ -61,6 +61,9 @@ export function registerAppListener(navigation){
           navigation.navigate('Detail')
         }, 500)
       }
+      setTimeout(()=>{
+        alert(`User tapped notification\n${JSON.stringify(notif)}`)
+      }, 500)
     }
 
     if(Platform.OS ==='ios'){