需要 Dimensions
導入 var Dimensions=require('Dimensions')
使用如下

import React, { Component } from 'react';
import {
    Platform,
    StyleSheet,
    Text,
    View,
    Image,
    ListView
} from 'react-native';

var Dimensions=require('Dimensions')

export default class Good extends Component<{}> {

    render() {
        return (
             <View>
                 <Text>當前屏幕的寬度是{Dimensions.get('window').width}</Text>
                 <Text>當前屏幕的高度是{ Dimensions.get('window').height}</Text>
             </View>
        );
    }
}




const styles=StyleSheet.create({

})