klo belum dapat location jgn load menu

view/MenuSelection.js

 import React from 'react';
-import { View, Text, StyleSheet, ScrollView, TouchableOpacity, Image, FlatList, Button, StatusBar, ActivityIndicator } from 'react-native';
+import { View, Text, StyleSheet, ScrollView, TouchableOpacity, Image, FlatList, Button, StatusBar, ActivityIndicator, Alert } from 'react-native';
 import Axios from 'axios';
 import Item from './Item';
 import { connect } from 'react-redux';
@@ -24,8 +24,23 @@ class MenuSelection extends React.Component {
     }
   }
   componentDidMount() {
-    this.getMenuList()
+    if (this.props.outlet_id != '') {
+      this.getMenuList()
+    } else {
+      Alert.alert('Device belum mendapatkan lokasi anda')
+    }
     console.log("INI OUTLET : "+ this.props.outlet_id)
+    this._unsubscribe = this.props.navigation.addListener('focus', () => {
+      if (this.props.outlet_id != '') {
+        this.getMenuList()
+      } else {
+        Alert.alert('Device belum mendapatkan lokasi anda')
+      }
+    });
+  }
+
+  componentWillUnmount() {
+    this._unsubscribe();
   }
 
   getMenuList() {