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App.js
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App.js
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/**
* Sample React Native App
* https://github.com/facebook/react-native
* @flow
*/
import React, {Component} from 'react';
import {
Platform,
StyleSheet,
Text,
View,
TouchableOpacity,
FlatList
} from 'react-native';
import RNFS from 'react-native-fs';
import FileOpener from 'react-native-file-opener';
const SavePath = Platform.OS === 'ios'
? RNFS.DocumentDirectoryPath
: 'file://' + RNFS.ExternalDirectoryPath;
const instructions = Platform.select({
ios: 'Press Cmd+R to reload,\n' + 'Cmd+D or shake for dev menu',
android: 'Double tap R on your keyboard to reload,\n' + 'Shake or press menu button for dev menu'
});
export default class App extends Component {
constructor(props) {
super(props);
this.state = {
result: []
};
}
componentDidMount() {
this._getFileList()
}
_getFileList = () => {
RNFS.readDir(SavePath).then((result) => {
this.setState({result})
}).catch((err) => {
console.log(err, err.message, err.code);
});
}
_onPressWrite = () => {
const path = SavePath + '/test.doc';
RNFS.writeFile(path, '文档内容测试doc', 'utf8').then((success) => {
console.log('FILE 写成功!');
this._getFileList()
}).catch((err) => {
console.log('writeFile err', err.message);
});
}
_onPressDel = (path, index) => {
return RNFS.unlink(path).then(() => {
console.log('删除成功!');
let datas = [];
datas = datas.concat(this.state.result);
datas.splice(index, 1);
this.setState({result: datas});
}).catch((err) => {
console.log('输出出错:', err.message);
});
}
_onPressDownload = () => {
const sampleImageFileURL = 'https://raw.githubusercontent.com/huangzuizui/react-native-file-opener-demo/master/sample/sample.jpg';
const sampleImageFilePath = SavePath + '/sample.jpg';
RNFS.downloadFile({fromUrl: sampleImageFileURL, toFile: sampleImageFilePath}).promise.then(res => {
console.log('downloadFile', res);
this._getFileList()
}).catch(err => console.log('downloadFile err', err))
}
_onPressOpen = (path) => {
const FilePath = path;
const urlLast = FilePath.lastIndexOf(".");
const urlType = FilePath.substr(urlLast + 1);
const FileMimeType = (urlType === ('jpg' || 'jpeg' || 'png'))
? 'image'
: 'application/msword';
FileOpener.open(FilePath, FileMimeType).then((msg) => {
console.log('success!!', msg)
}, (e) => {
console.log('error!!', e)
});
}
_keyExtractor = (item, i) => {
return `list${i}`
}
_renderItem = (item, index) => {
return (<View style={styles.listLine}>
<TouchableOpacity style={styles.listTxt} onPress={() => this._onPressOpen(item.path)}>
<Text>{item.name}</Text>
</TouchableOpacity>
<TouchableOpacity style={styles.listDel} onPress={() => this._onPressDel(item.path, index)}>
<Text>删除</Text>
</TouchableOpacity>
</View>)
}
_renderHead = () => {
return (<View>
<Text style={styles.listHead}>点击下面的文件本地打开</Text>
</View>)
}
_renderEmpty = () => {
return (<View>
<Text style={styles.noList}>还没有本地文件</Text>
</View>)
}
render() {
const {result} = this.state;
return (<View style={styles.container}>
<Text style={styles.welcome}>
本地文件管理
</Text>
<Text style={styles.instructions}>
文件本地创建,下载,打开,删除
</Text>
<TouchableOpacity style={styles.btnBack} onPress={this._onPressWrite}>
<Text style={styles.btnBackTxt}>创建本地文件</Text>
</TouchableOpacity>
<TouchableOpacity style={styles.btnBack} onPress={this._onPressDownload}>
<Text style={styles.btnBackTxt}>下载远程文件</Text>
</TouchableOpacity>
<FlatList style={styles.lists} data={result} extraData={this.state} keyExtractor={this._keyExtractor} ListHeaderComponent={this._renderHead} ListEmptyComponent={this._renderEmpty} renderItem={({item, index}) => this._renderItem(item, index)}/>
<Text style={styles.instructions}>
{instructions}
</Text>
</View>);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
padding: 20
},
welcome: {
fontSize: 20,
textAlign: 'center',
margin: 10
},
instructions: {
textAlign: 'center',
color: '#333333',
marginBottom: 5
},
btnBack: {
backgroundColor: '#549bf0',
marginTop: 15,
padding: 5,
borderWidth: 1,
borderColor: '#1f84e0',
width: '80%'
},
btnBackTxt: {
color: '#fff',
fontSize: 14,
fontWeight: 'bold',
lineHeight: 20
},
lists: {
flex: 1,
width: '100%'
},
listHead: {
lineHeight: 50,
fontWeight: 'bold',
fontSize: 16
},
noList: {
fontSize: 12
},
listLine: {
flexDirection: 'row',
paddingVertical: 5,
flex: 1
},
listTxt: {
flex: 1
},
listDel: {
width: 80,
alignItems: 'center'
}
});