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index.android.js
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index.android.js
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/**
* Sample React Native App
* https://github.com/facebook/react-native
* @flow
*/
import React, { Component } from 'react';
import {
AppRegistry,
StyleSheet,
Text,
View,
Button,
ActivityIndicator
} from 'react-native';
import fetch from 'react-native-fetch-polyfill';
export default class FetchDemo extends Component {
constructor() {
super();
this.state = { loading: false };
}
handleFetch() {
this.setState({ loading: true });
fetch('http://82.69.20.215:8085/app.json', { timeout: 5000 })
.then(response => response.json())
.then(json => {
this.setState({ loading: false });
})
.catch(err => {
console.warn(err);
this.setState({ loading: false });
});
}
render() {
return (
<View style={styles.container}>
<Text style={styles.welcome}>
Welcome to React Native!
</Text>
<Button
onPress={this.handleFetch.bind(this)}
title="Fetch"
color="#841584"
/>
{this.state.loading &&
<View style={styles.loading}>
<ActivityIndicator size="large" />
</View>
}
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
},
welcome: {
fontSize: 20,
textAlign: 'center',
margin: 10,
},
loading: {
position: 'absolute',
left: 0,
right: 0,
top: 0,
bottom: 0,
alignItems: 'center',
justifyContent: 'center',
backgroundColor: '#F5FCFF88'
},
instructions: {
textAlign: 'center',
color: '#333333',
marginBottom: 5,
},
});
AppRegistry.registerComponent('FetchDemo', () => FetchDemo);