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Undefined is not an object-React Native

Hi I am new to react native i am facing this error TypeError:undefined is not an object (evaluating this.state.items)
Another problem is it is returning me the data in an array how do i display the data as a string
import React, { Component } from "react";
import {StyleSheet,View,ActivityIndicator,FlatList,Text,TouchableOpacity} from "react-native";
export default class Source extends React.Component {
static navigationOptions = ({ navigation }) => {
return {
title: "Source Listing",
headerStyle: {backgroundColor: "#fff"},
headerTitleStyle: {textAlign: "center",flex: 1}
};
};
constructor(props) {
super(props);
this.state = {
loading: false,
items:[]
};
this.fetchRequest=this.fetchRequest.bind.this
}
FlatListItemSeparator = () => {
return (
<View style={{
height: .5,
width:"100%",
backgroundColor:"rgba(0,0,0,0.5)",
}}
/>
);
}
componentDidMount()
{
fetchRequest();
}
renderItem=(data)=>
<TouchableOpacity style={styles.list}>
<Text style={styles.lightText}>{data.item.name}</Text>
<Text style={styles.lightText}>{data.item.email}</Text>
<Text style={styles.lightText}>{data.item.company.name}</Text>
</TouchableOpacity>
render(){
<FlatList
data= {this.state.dataSource}
ItemSeparatorComponent = {this.FlatListItemSeparator}
renderItem= {item=> this.renderItem(item)}
keyExtractor= {item=>item.id.toString()}
/>
fetchRequest()
{
const parseString = require('react-native-xml2js').parseString;
fetch('http://192.168.200.133/apptak_service/apptak.asmx/Get_Item_Master')
.then(response => response.text())
.then((response) => {
parseString(response, function (err, result) {
console.log(response)
});
}).catch((err) => {
console.log('fetch', err)
this.fetchdata();
})
if(this.state.loading){
return(
<View style={styles.loader}>
<ActivityIndicator size="large" color="#0c9"/>
</View>
)}}
return(
<View style={styles.container}>
</View>
)}
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: "#fff"
},
loader:{
flex: 1,
justifyContent: "center",
alignItems: "center",
backgroundColor: "#fff"
},
list:{
paddingVertical: 4,
margin: 5,
backgroundColor: "#fff"
}
});
Basically what i am trying to do is to get data from webservices and display the app on the screen

JSON data in not coming on FlstList in react native

I know how to populate jSON data on FlatList and I have done that , but now here , I am populating data in between button and table data , In componentDidMount i am calling both function , first table create and then JSON call , Table data I am taking from QRCode scan from another screen and taking here .
import React, { Component } from 'react';
import { StyleSheet, View, ActivityIndicator, ScrollView } from 'react-native';
import { Table, Row, Rows } from 'react-native-table-component';
import {Button, Text, DatePicker, Item, Picker, Input,
Textarea,FlatList} from 'native-base';
export default class OpenApplianceIssue extends Component {
constructor(props) {
super(props);
this.state = {
// tableHead: ['Head', 'Head2', 'Head3', 'Head4'],
tableData: [], qrData: '', loading: false, selectedPriority: '',
selectedIssue: '', selectedReason: '', selectedTriedRestart: '',
selectedPowerLED: '', selectedBurning: '', selectedNoise: '',
AbcSdata : null, loading : true,
}
this.setDate = this.setDate.bind(this);
}
setDate(newDate) {
}
_loadInitialState = async () => {
const { navigation } = this.props;
const qdata = navigation.getParam('data', 'NA').split(',');
var len = qdata.length;
const tData = [];
console.log(len);
for(let i=0; i<len; i++)
{
var data = qdata[i].split(':');
const entry = []
entry.push(`${data[0]}`);
entry.push(`${data[1]}`);
tData.push(entry);
}
this.setState({tableData: tData } );
console.log(this.state.tableData);
this.setState({loading: true});
}
componentDidMount() {
this._loadInitialState().done();
// this.createViewGroup();
}
// componentDidMount() {
// this.createViewGroup();
// }
createViewGroup = async () => {
try {
const response = await fetch(
'http://Dsenze/userapi/sensor/viewsensor',
{
method: 'POST',
headers: {
Accept: 'application/json',
'Content-Type': 'application/json',
},
body: JSON.stringify({
"password": 'admin',
"username": 'admin',
"startlimit":"0",
"valuelimit":"10",
}),
}
);
const responseJson = await response.json();
const { sensorData } = responseJson;
this.setState({
AbcSdata: sensorData,
loading: false,
});
} catch (e) {
console.error(e);
}
};
updateSearch = search => {
this.setState({ search });
};
keyExtractor = ({ id }) => id.toString();
keyExtractor = ({ inventory }) => inventory.toString();
renderItem = ({ item }) => (
<TouchableOpacity
style={styles.item}
activeOpacity={0.4}
onPress={() => {
this.clickedItemText(item);
}}>
<Text style={styles.buttonText}>Id {item.inventory}</Text>
<Text>Inv {item.inventory}</Text>
<Text>Sensor {item.inventory}</Text>
</TouchableOpacity>
);
onClickListener = (viewId) => {
if(viewId == 'tag')
{
this.props.navigation.navigate('AddSensors');
}}
render() {
const state = this.state;
const AbcSdata = this.state;
if(this.state.loading == false) {
return ( <ActivityIndicator size='large' style={{height:80}} /> )
}
else {
return (
<ScrollView style={styles.container}>
<Button full rounded light style={{backgroundColor: 'blue', justifyContent: 'center', alignItems: 'center'}}
onPress={() => this.onClickListener('tag')}>
<Text style={{color: 'white'}}>Add Sensors</Text>
</Button>
<View style={styles.container1}>
{this.state.loading ? (
<ActivityIndicator size="large" />
) :
(
<FlatList
AbcSdata={AbcSdata}
renderItem={this.renderItem}
keyExtractor={this.keyExtractor}
/>
)}
</View>
<View>
<Text
style={{alignSelf: 'center', fontWeight: 'bold', color: 'black'}} >
Inventory Details
</Text>
<Table borderStyle={{borderWidth: 2, borderColor: '#c8e1ff', padding:10,paddingBottom: 10}}>
<Rows data={state.tableData} textStyle={styles.text}/>
</Table>
</View>
</ScrollView>
)
}
}
}
const styles = StyleSheet.create({
container: { flex: 1, padding: 16, paddingTop: 30, backgroundColor: '#fff' },
head: { height: 40, backgroundColor: '#f1f8ff' },
text: { margin: 6 }
});

try this code ..
import React, { Component } from 'react';
import { View, Text, TextInput,
FooterTab,Button,TouchableOpacity, ScrollView, StyleSheet,
ActivityIndicator ,Header,FlatList} from 'react-native';
import {Icon} from 'native-base';
import { Table, Row, Rows } from 'react-native-table-component';
import { createStackNavigator } from 'react-navigation';
import { SearchBar } from 'react-native-elements';
export default class OpenApplianceIssue extends Component {
constructor() {
super();
this.state = {
AbcSdata: null,
loading: true,
search: '',
tableData: [], qrData: '', selectedPriority: '',
selectedIssue: '', selectedReason: '', selectedTriedRestart: '',
selectedPowerLED: '', selectedBurning: '', selectedNoise: '',
};
this.setDate = this.setDate.bind(this);
}
setDate(newDate) {
}
_loadInitialState = async () => {
const { navigation } = this.props;
const qdata = navigation.getParam('data', 'NA').split(',');
var len = qdata.length;
const tData = [];
console.log(len);
for(let i=0; i<len; i++)
{
var data = qdata[i].split(':');
const entry = []
entry.push(`${data[0]}`);
entry.push(`${data[1]}`);
tData.push(entry);
}
this.setState({tableData: tData } );
console.log(this.state.tableData);
this.setState({loading: true});
}
componentDidMount() {
this._loadInitialState().done();
this.createViewGroup();
}
createViewGroup = async () => {
try {
const response = await fetch(
'http:Dsenze/userapi/sensor/viewsensor',
{
method: 'POST',
headers: {
Accept: 'application/json',
'Content-Type': 'application/json',
},
body: JSON.stringify({
"password": 'admin',
"username": 'admin',
"startlimit":"0",
"valuelimit":"10",
}),
}
);
const responseJson = await response.json();
const { sensorData } = responseJson;
this.setState({
AbcSdata: sensorData,
loading: false,
});
} catch (e) {
console.error(e);
}
};
updateSearch = search => {
this.setState({ search });
};
keyExtractor = ({ id }) => id.toString();
keyExtractor = ({ inventory }) => inventory.toString();
renderItem = ({ item }) => (
<TouchableOpacity
style={styles.item}
activeOpacity={0.4}
onPress={() => {
this.clickedItemText(item);
}}>
<Text style={styles.buttonText}>Id {item.id}</Text>
<Text>Hospital Name {item.inventory}</Text>
<Text>User {item.inventory}</Text>
<Text>Date {item.inventory}</Text>
</TouchableOpacity>
);
onClickListener = (viewId) => {
if(viewId == 'tag')
{
this.props.navigation.navigate('AddSensors');
}}
renderSeparator = () => {
return (
<View
style={{
height: 1,
width: "86%",
backgroundColor: "#CED0CE",
}}
/>
);
};
render() {
const { loading, AbcSdata } = this.state;
const state = this.state;
return (
<ScrollView>
<View style={styles.container1}>
<TouchableOpacity full rounded light style={{backgroundColor: 'blue', justifyContent: 'center', alignItems: 'center'}}
onPress={() => this.onClickListener('tag')}>
<Text style={{color: 'white'}}>Add Sensors</Text>
</TouchableOpacity>
</View>
<View style={styles.container1}>
{this.state.loading ? (
<ActivityIndicator size="large" />
) :
(
<FlatList
data={AbcSdata}
renderItem={this.renderItem}
keyExtractor={this.keyExtractor}
ItemSeparatorComponent={this.renderSeparator}
/>
)}
</View>
<View>
<Text
style={{alignSelf: 'center', fontWeight: 'bold', color: 'black'}} >
Inventory Details
</Text>
<Table borderStyle={{borderWidth: 2, borderColor: '#c8e1ff', padding:10,paddingBottom: 10}}>
<Rows data={state.tableData} textStyle={styles.text}/>
</Table>
</View>
</ScrollView>
);
}
}
const styles = StyleSheet.create(
{
container1:
{
flex: 1,
alignItems: 'stretch',
fontFamily: "vincHand",
color: 'blue'
},
header_footer_style:{
width: '100%',
height: 44,
backgroundColor: '#4169E1',
alignItems: 'center',
justifyContent: 'center',
color:'#ffffff',
},
Progressbar:{
justifyContent: 'center',
alignItems: 'center',
color: 'blue',
},
ListContainer :{
borderColor: '#48BBEC',
backgroundColor: '#000000',
color:'red',
alignSelf: 'stretch' ,
},
container2:
{
flex: 1,
justifyContent: 'center',
alignItems: 'stretch',
paddingHorizontal: 15
},
inputBox:{
width:300,
borderColor: '#48BBEC',
backgroundColor: '#F8F8FF',
borderRadius:25,
paddingHorizontal:16,
fontSize:16,
color:'#000000',
marginVertical:10,
},
button:{
width:300,
backgroundColor:'#4169E1',
borderRadius:25,
marginVertical:10,
paddingVertical:16
},
buttonText:{
fontSize:16,
fontWeight:'500',
color:'#ffffff',
textAlign:'center'
},
textStyle:{
fontSize:16,
fontWeight:'500',
color:'#ffffff',
textAlign:'center'
},
item:
{
padding: 15
},
text:
{
fontSize: 18
},
button:{
width:300,
backgroundColor:'#4169E1',
borderRadius:25,
marginVertical:10,
paddingVertical:16
},
buttonText:{
fontSize:16,
fontWeight:'500',
color:'red',
textAlign:'center'
},
separator:
{
height: 2,
backgroundColor: 'rgba(0,0,0,0.5)'
},
container: { flex: 1, padding: 16, paddingTop: 30, backgroundColor: '#fff' },
head: { height: 40, backgroundColor: '#f1f8ff' },
text: { margin: 6 }
});

In your FlatList component you are setting AbcSdata={AbcSdata}, while you should be setting the data prop:
<FlatList
data={AbcSdata}
renderItem={this.renderItem}
keyExtractor={this.keyExtractor}
/>

It could be because _loadInitialState in your componentDidMount is an async call and table is getting rendered initially with no data. You could try passing in some prop to refresh once you have data. Also, in the code you put here, all calls to createViewGroup() are commented out but the definition is still there. Not a big problem but still very confusing for someone looking into your code.

How can I switch to the second input when first will be done in React Native

I am creating a Taxi Application just like Uber where user enters two locations in given inputs (Pickup and Dropoff), I done with the PickUp when User enters a location it shows the googleautocomplete listview for location and can select the pickup location, but I am stuch with the Dropoff when I write something in the second input it changes the first too or when I click the clear icon it clears text from both inputs. So what do I have to do to solve this problem kindly help please Thanks.
AutoCompeleteInputs.js
import React from 'react';
import { TextInput, View, StyleSheet, Animated, TouchableOpacity } from "react-native";
import AutoCompleteListView from "./AutoCompleteListView";
import Events from "react-native-simple-events";
import debounce from '../utils/debounce'
import fetch from 'react-native-cancelable-fetch';
import MaterialIcons from "react-native-vector-icons/MaterialIcons";
const AUTOCOMPLETE_URL = "https://maps.googleapis.com/maps/api/place/autocomplete/json";
const REVRSE_GEO_CODE_URL = "https://maps.googleapis.com/maps/api/geocode/json";
export default class AutoCompleteInput extends React.Component {
static defaultProps = {
language: 'en'
};
constructor(props) {
super(props);
}
componentWillUnmount() {
this._abortRequest();
}
state = {
predictions: [],
loading: false,
inFocus: false,
};
_abortRequest = () => {
fetch.abort(this);
};
fetchAddressForLocation = (location) => {
this.setState({ loading: true, predictions: [] });
let { latitude, longitude } = location;
fetch(`${REVRSE_GEO_CODE_URL}?key=${API_KEY}&latlng=${latitude},${longitude}`, null, this)
.then(res => res.json())
.then(data => {
this.setState({ loading: false });
let { results } = data;
if (results.length > 0) {
let { formatted_address } = results[0];
this.setState({ text: formatted_address });
}
});
}
_request = (text) => {
this._abortRequest();
if (text.length >= 3) {
fetch(`${AUTOCOMPLETE_URL}?input=${encodeURIComponent(text)}&key=${API_KEY}&language=${this.props.language}`, null, this)
.then(res => res.json())
.then(data => {
let { predictions } = data;
this.setState({ predictions });
});
} else {
this.setState({ predictions: [] });
}
}
_onChangeText = (text) => {
this._request(text);
this.setState({ text });
}
_onFocus = () => {
this._abortRequest();
this.setState({ loading: false, inFocus: true });
Events.trigger('InputFocus');
}
_onBlur = () => {
this.setState({ inFocus: false });
Events.trigger('InputBlur');
}
blur = () => {
this._input.blur();
}
_onPressClear = () => {
this.setState({ text: '', predictions: [] });
}
_getClearButton = () => {
return this.state.inFocus ?
(<TouchableOpacity style={styles.btn} onPress={this._onPressClear}>
<MaterialIcons name={'clear'} size={20} />
</TouchableOpacity>) : null;
}
getAddress = () => {
return this.state.loading ? '' : this.state.text;
}
render() {
return (
<Animated.View style={this.props.style}>
<View style={{ flexDirection: 'column' }}>
<View
style={styles.textInputPickupContainer}
elevation={5}>
<TextInput
ref={input => this._input = input}
value={this.state.loading ? 'Loading...' : this.state.text}
style={styles.textInput}
underlineColorAndroid={'transparent'}
placeholder={'Pickup'}
onFocus={this._onFocus}
onBlur={this._onBlur}
onChangeText={this._onChangeText}
outlineProvider='bounds'
autoCorrect={false}
spellCheck={false} />
{this._getClearButton()}
</View>
<View
style={styles.textInputDropoffContainer}
elevation={5}>
<TextInput
ref={input => this._input = input}
value={this.state.loading ? 'Loading...' : this.state.dropOff}
style={styles.textInput}
underlineColorAndroid={'transparent'}
placeholder={'Dropoff'}
onFocus={this._onFocus}
onBlur={this._onBlur}
onChangeText={(text) => this.setState({dropOff: text})}
outlineProvider='bounds'
autoCorrect={false}
spellCheck={false} />
{this._getClearButton()}
</View>
</View>
<View style={styles.listViewContainer}>
<AutoCompleteListView
predictions={this.state.predictions} />
</View>
</Animated.View>
);
}
}
const styles = StyleSheet.create({
textInputPickupContainer: {
flexDirection: 'row',
height: 40,
zIndex: 10,
paddingLeft: 10,
borderRadius: 5,
backgroundColor: 'white',
shadowOffset: {
width: 0,
height: 2
},
shadowRadius: 2,
alignItems: 'center'
},
textInputDropoffContainer: {
flexDirection: 'row',
height: 40,
zIndex: 10,
paddingLeft: 10,
marginTop: 10,
borderRadius: 5,
backgroundColor: 'white',
shadowOffset: {
width: 0,
height: 2
},
shadowRadius: 2,
alignItems: 'center'
},
textInput: {
flex: 1,
fontSize: 17,
color: '#404752'
},
btn: {
width: 30,
height: 30,
padding: 5,
justifyContent: 'center',
alignItems: 'center'
},
listViewContainer: {
paddingLeft: 3,
paddingRight: 3,
paddingBottom: 3
},
});
SearchRoute.js(Main)
return (
<View style={styles.container}>
<MapView
ref={(mapView) => this._map = mapView}
style={styles.mapView}
region={this.state.region}
showsMyLocationButton={true}
showsUserLocation={false}
onPress={({ nativeEvent }) => this._setRegion(nativeEvent.coordinate)}
onRegionChange={this._onMapRegionChange}
onRegionChangeComplete={this._onMapRegionChangeComplete}
/>
<Entypo name={'location-pin'} size={30}
color={this.props.markerColor}
style={{ backgroundColor: 'transparent' }} />
<View style={styles.fullWidthContainer}>
<AutoCompleteInput
ref={input => this._input = input}
apiKey={API_KEY}
style={[styles.input, { transform: [{ scale: inputScale }] }]}
debounceDuration={this.props.debounceDuration}
/>
</View>

The error is that you are assigning the same value to both TextInputs, so if you change one, the other TextInput will change too to the same value.
On your AutoCompeleteInputs.js change dropOff TextInput's value to
<TextInput
...
value={this.state.loading ? 'Loading...' : this.state.dropOff}
...
/>
So when you change dropOff value, the pickUp point will be the same you entered before, and if you clear one the other will not change.
Also change dropOff onChangeText={this._onChangeText} to onChangeText={(text) => this.setState({dropOff: text}) to ensure that you are storing the correct value.

Render fetch results after button is pressed

I have a list of articles which is fetching from server(json).There will be two server calls.What I meant is now I'm listing some article title (fetching from server1) within a Card.Below that there will be an add button for copy and pasting new article links(that will be saved to a different server).So I'm trying to append this newly added articles to my existing list(just like the same in pocket app).How can I do this?I've tried something like the below.But I'm getting error , may be a little mistake please help me to figure out.Since the render should happen only after button click(for viewing newly added ones).So state will also set after that right?How can I do that?
import {article} from './data'; //json
import AddNewarticle from './AddNewarticle';
class SecondScreen extends Component {
state= {
newarticle: []
};
// request for saving newly added article
onPressSubmit(){
fetch('www.mywebsite.com',{
method: 'POST',
headers:{
'Accept': 'application/json',
'Content-Type': 'application/json',
},
body: JSON.stringify({
url: this.state.url,
})
})
.then(response => response.json())
.then((responseData) => this.setState({newarticle: responseData}));
}
renderArticle(){
this.state.newarticle.message.map(newlist =>
<AddNewarticle key ={newlist.title} newlist={newlist} />
);
}
render(){
return(
<ScrollView>
{article.map(a =>
<CardSection>
<Text>
{a.title}</Text>
</CardSection>
{this.renderArticle()}
</ScrollView>
<Icon
raised
name="check"
type="feather"
color="#c1aba8"
iconStyle={{ resizeMode: "contain" }}
onPress={() => {
this.onPressSubmit();
}}
/>
);
}
Also my newarticle (json) is as follows.The response I'm getting from server after submitting new articles.
{
"message": {
"authors": [
"Zander Nethercutt"
],
"html": "<div><p name=\"c8e3\" id=\"c8e3\" class=\"graf graf--p graf--hasDropCapModel graf--hasDropCap graf--leading\">The presence of advertising in This is the power of branding.",
"title": "The Death of Advertising – Member Feature Stories – Medium"
},
"type": "success"
}
The error I'm getting is newarticle is not defined.

import React, { Component } from 'react';
import { AppRegistry, StyleSheet, ActivityIndicator, ListView, Text, View, Alert,Image, Platform } from 'react-native';
class App extends Component {
constructor(props) {
super(props);
this.state = {
isLoading: true
}
}
GetItem (flower_name) {
Alert.alert(flower_name);
}
componentDidMount() {
return fetch('https://reactnativecode.000webhostapp.com/FlowersList.php')
.then((response) => response.json())
.then((responseJson) => {
let ds = new ListView.DataSource({rowHasChanged: (r1, r2) => r1 !== r2});
this.setState({
isLoading: false,
dataSource: ds.cloneWithRows(responseJson),
}, function() {
// In this block you can do something with new state.
});
})
.catch((error) => {
console.error(error);
});
}
ListViewItemSeparator = () => {
return (
<View
style={{
height: .5,
width: "100%",
backgroundColor: "#000",
}}
/>
);
}
render() {
if (this.state.isLoading) {
return (
<View style={{flex: 1, paddingTop: 20}}>
<ActivityIndicator />
</View>
);
}
return (
<View style={styles.MainContainer}>
<ListView
dataSource={this.state.dataSource}
renderSeparator= {this.ListViewItemSeparator}
renderRow={(rowData) =>
<View style={{flex:1, flexDirection: 'row'}}>
<Image source = {{ uri: rowData.flower_image_url }} style={styles.imageViewContainer} />
<Text onPress={this.GetItem.bind(this, rowData.flower_name)} style={styles.textViewContainer} >{rowData.flower_name}</Text>
</View>
}
/>
</View>
);
}
}
const styles = StyleSheet.create({
MainContainer :{
// Setting up View inside content in Vertically center.
justifyContent: 'center',
flex:1,
margin: 5,
paddingTop: (Platform.OS === 'ios') ? 20 : 0,
},
imageViewContainer: {
width: '50%',
height: 100 ,
margin: 10,
borderRadius : 10
},
textViewContainer: {
textAlignVertical:'center',
width:'50%',
padding:20
},
tabIcon: {
width: 16,
height: 16,
}
});
AppRegistry.registerComponent('App', () => App);
export default App;

react-native: `this.state` is undefined in login function

I'm having trouble accessing this.state in functions inside my component.
Always I get "Undefined is not a object this.state.username, this.state.password" error
SimpleForm.js
import Expo from 'expo';
import React from 'react';
import { StackNavigator, DrawerNavigator } from 'react-navigation';
import App from './App';
import RegisterForm from './register';
import { View, Text, TextInput, Image, TouchableOpacity, AsyncStorage, StyleSheet } from 'react-native';
import { YourRestApi } from './constants/api3';
class SimpleForm extends React.Component {
constructor(props) {
super(props);
this.state = { username: '', password: '', datas: '' };
this.login = this.login.bind(this, this.state.username, this.state.password);
}
componentWillMount() {
this.login();
}
registerscreen = () => {
this.props.navigation.navigate('Register');
}
login() {
YourRestApi(this.state.username, this.state.password)
.then((response) => {
console.log(response.success);
this.setState({ loading: false, datas: response });
});
if (this.state.datas.success === true) {
const info = this.state.datas.message;
AsyncStorage.setItem('info', JSON.stringify(info));
this.props.navigation.navigate('SecondScreen');
} else {
alert(this.state.datas.message);
}
}
render() {
const { navigate } = this.props.navigation;
return (
<View style={styles.container}>
<Image source={require('./assets/img/sd.png')} style={styles.backgroundImage}>
<View style={styles.content}>
<Text style={styles.logo}>Toto Prediction </Text>
<View style={styles.inputContainer}>
<TextInput
underlineColorAndroid='transparent' style={styles.input}
onChangeText={(username) => this.setState({ username })}
value={this.state.username} placeholder='username'
/>
<TextInput
secureTextEntry underlineColorAndroid='transparent' style={styles.input}
onChangeText={(password) => this.setState({ password })}
value={this.state.password} placeholder='password'
/>
</View>
<TouchableOpacity onPress={this.login} style={styles.buttonContainer}>
<Text style={styles.buttonText}>Login</Text>
</TouchableOpacity>
this._onPressGet.bind(this)
<TouchableOpacity onPress={this.registerscreen} style={styles.buttonContainer}>
<Text style={styles.buttonText}>Register</Text>
</TouchableOpacity>
</View>
</Image>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
},
backgroundImage: {
flex: 1,
alignSelf: 'stretch',
width: null,
justifyContent: 'center',
},
content: {
alignItems: 'center',
},
logo: {
color: 'white',
fontSize: 40,
fontStyle: 'italic',
fontWeight: 'bold',
textShadowColor: '#252525',
textShadowOffset: { width: 2, height: 2 },
textShadowRadius: 15,
marginBottom: 20,
},
inputContainer: {
margin: 20,
marginBottom: 0,
padding: 20,
paddingBottom: 10,
alignSelf: 'stretch',
borderWidth: 1,
borderColor: '#fff',
backgroundColor: 'rgba(255,255,255,0.2)',
},
input: {
fontSize: 16,
height: 40,
padding: 10,
marginBottom: 10,
backgroundColor: 'rgba(255,255,255,1)',
},
buttonContainer: {
margin: 20,
padding: 20,
backgroundColor: 'blue',
borderWidth: 1,
borderColor: '#fff',
backgroundColor: 'rgba(255,255,255,0.6)',
},
buttonText: {
fontSize: 16,
fontWeight: 'bold',
textAlign: 'center',
},
});
const SimpleApp = DrawerNavigator({
Onescreen: { screen: SimpleForm },
SecondScreen: { screen: App },
Register: { screen: RegisterForm },
});
Expo.registerRootComponent(SimpleApp);
Api3.js
export function YourRestApi(username1, password1) {
fetchlogin(username1, password1);
}
function fetchlogin(username1, password1) {
const details = {
username: username1,
password: password1,
};
const formBody = Object.keys(details).map(key => `${encodeURIComponent(key)}=${encodeURIComponent(details[key])}`).join('&');
fetch('https://*********************', {
method: 'POST',
headers: {
Accept: 'application/json',
'Content-Type': 'application/x-www-form-urlencoded',
},
body: formBody,
})
.then((response) => response.json())
.then((response) => {
console.log('requestAppInstallation success ', response);
return response;
})
.done();
}
I tried binding login to this.state but doesnt worked
I already checked other questions but nothing is worked
Any idea what could be causing this ?

In your constructor replace the binding statement like below
constructor(props) {
super(props);
this.state = { username: '', password: '', datas: '' };
this.login = this.login.bind(this);
}

Your login function should be bound in order for it to access the correct this if passed to a Touchable.
Could be fixed by either one of these ways:
<TouchableOpacity onPress={this.login.bind(this)} ...>
OR:
<TouchableOpacity onPress={() => this.login()} ...>

It is basically nothing but just an error returned by firebase in case user enters wrongly formatted email. Try entering rightly formatted email id in the signup or login form and you will not get that error from firebase.
Firebase basically checks at its end whether user entered correct mail id or not while creating new user.