101 lines
2.6 KiB
JavaScript
101 lines
2.6 KiB
JavaScript
/**
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* Sample React Native App
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* https://github.com/facebook/react-native
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*/
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import React, { Component } from 'react';
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import { AppRegistry, CameraRoll, StyleSheet, Text, View, Image, Alert, TouchableOpacity } from 'react-native';
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import Spinner from 'react-native-gifted-spinner';
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import ImageResizer from 'react-native-image-resizer';
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const styles = StyleSheet.create({
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container: {
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flex: 1,
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justifyContent: 'center',
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alignItems: 'center',
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backgroundColor: '#F5FCFF',
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},
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welcome: {
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fontSize: 20,
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textAlign: 'center',
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margin: 10,
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},
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instructions: {
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textAlign: 'center',
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color: '#333333',
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marginBottom: 5,
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},
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image: {
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width: 250,
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height: 250,
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},
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resizeButton: {
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color: '#333333',
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fontWeight: 'bold',
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marginBottom: 5,
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},
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});
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export default class ResizerExample extends Component {
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constructor() {
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super();
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this.state = {
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resizedImageUri: '',
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loading: true,
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};
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}
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componentDidMount() {
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CameraRoll.getPhotos({ first: 1 })
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.then(photos => {
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if (!photos.edges || photos.edges.length === 0) {
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return Alert.alert(
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'Unable to load camera roll',
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'Check that you authorized the access to the camera roll photos and that there is at least one photo in it'
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);
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}
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this.setState({
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image: photos.edges[0].node.image,
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});
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})
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.catch(() => {
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return Alert.alert(
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'Unable to load camera roll',
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'Check that you authorized the access to the camera roll photos'
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);
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});
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}
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resize() {
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ImageResizer.createResizedImage(this.state.image.uri, 8, 6, 'JPEG', 80)
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.then(({ uri }) => {
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this.setState({
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resizedImageUri: uri,
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});
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})
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.catch(err => {
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console.log(err);
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return Alert.alert('Unable to resize the photo', 'Check the console for full the error message');
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});
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}
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render() {
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return (
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<View style={styles.container}>
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<Text style={styles.welcome}>Image Resizer example</Text>
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<Text style={styles.instructions}>This is the original image:</Text>
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{this.state.image ? <Image style={styles.image} source={{ uri: this.state.image.uri }} /> : <Spinner />}
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<Text style={styles.instructions}>Resized image:</Text>
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<TouchableOpacity onPress={() => this.resize()}>
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<Text style={styles.resizeButton}>Click me to resize the image</Text>
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</TouchableOpacity>
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{this.state.resizedImageUri ? (
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<Image style={styles.image} source={{ uri: this.state.resizedImageUri }} />
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) : null}
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</View>
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);
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}
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}
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