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Home.js
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Home.js
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import React, { Component } from 'react';
import { AsyncStorage,FlatList, StyleSheet, Text, View,Button, TextInput,TouchableHighlight,Alert,} from 'react-native';
import { createStackNavigator } from 'react-navigation';
var i = 1;
class UselessTextInput extends Component {
render() {
return (
<TextInput
{...this.props} // Inherit any props passed to it; e.g., multiline, numberOfLines below
editable = {true}
maxLength = {35}
/>
);
}
}
export default class ListsScreen extends React.Component {
constructor(props) {
super(props);
this.state = {
text: 'New List',
data: [],
};
this._retrieveData()
}
_retrieveData = async () => {
try {
const value = await AsyncStorage.getItem('ListNames');
if (value !== null) {
this.setState({ data: value.split(",") })
}
} catch (error) {
Alert.alert('didnt retrieve')
}
}
_storeData = async (textBox) => {
try {
var dataString = [textBox].concat(this.state.data);
await AsyncStorage.setItem('ListNames', dataString.toString());
} catch (error) {
Alert.alert('Error saving')
}
}
render() {
return (
<View style={styles.container}>
<View style={{marginTop: 20, height: 50, backgroundColor: 'powderblue', flex: 0.05, flexDirection: 'row'} }>
<Button
onPress={() => {this.setState((prevState, props) => {
var textBox = prevState.text
if (textBox === 'New List') {
textBox = 'New List ' + String(i)
i = i+1;
}
if (Boolean(textBox)) {
this._storeData(textBox)
return {data: [textBox].concat(prevState.data) };
}
});
} }
title="+"
color="black"
/>
<UselessTextInput
multiline = {true}
numberOfLines = {1}
onChangeText={(text) => this.setState({text})}
value={this.state.text}
/>
</View>
<FlatList
data= {this.state.data}
renderItem={({item}) =>
<TouchableHighlight
onPress={() => this.props.navigation.navigate('Details')}
underlayColor='black'
>
<View>
<Text style={styles.item}>{item }</Text>
</View>
</TouchableHighlight>
}
keyExtractor={(item, index) => index.toString()}
/>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
paddingTop: 22
},
item: {
padding: 10,
fontSize: 18,
height: 44,
},
})