\u83b7\u53d6\u7f51\u7edc\u72b6\u6001\u662f\u5f02\u6b65\u7684\uff0c\u4f7f\u7528js\u7684Promise\u673a\u5236<\/p>\n
Android\u5e73\u53f0\u7684\u7f51\u7edc\u8fde\u63a5\u7c7b\u578b\u72b6\u6001\u5982\u4e0b\uff1a<\/p>\n
<\/p>\n
NONE<\/code>\uff1a\u8bbe\u5907\u6ca1\u6709\u7f51\u7edc\u8fde\u63a5<\/li>\n- 2).
BLUETOOTH<\/code>\uff1a\u84dd\u7259\u6570\u636e\u8fde\u63a5<\/li>\n- 3).
DUMMY<\/code>\uff1a\u865a\u62df\u6570\u636e\u8fde\u63a5<\/li>\n- 4).
ETHERNET<\/code>\uff1a\u4ee5\u592a\u7f51\u6570\u636e\u8fde\u63a5<\/li>\n- 5).
MOBILE<\/code>\uff1a\u624b\u673a\u79fb\u52a8\u7f51\u7edc\u6570\u636e\u8fde\u63a5<\/li>\n- 6).
MOBILE_DUN<\/code>\uff1a\u62e8\u53f7\u79fb\u52a8\u7f51\u7edc\u6570\u636e\u8fde\u63a5<\/li>\n- 7).
MOBILE_HIPRI<\/code>\uff1a\u9ad8\u6743\u9650\u7684\u79fb\u52a8\u7f51\u7edc\u6570\u636e\u8fde\u63a5<\/li>\n- 8).
MOBILE_MMS<\/code>\uff1a\u5f69\u4fe1\u79fb\u52a8\u7f51\u7edc\u6570\u636e\u8fde\u63a5<\/li>\n- 9).
MOBILE_SUPL<\/code>\uff1aSUP\u7f51\u7edc\u6570\u636e\u8fde\u63a5<\/li>\n- 10).
VPN<\/code>\uff1a\u865a\u62df\u7f51\u7edc\u8fde\u63a5\uff0c\u6700\u4f4e\u652f\u6301Android API 21\u7248\u672c<\/li>\n- 11).
WIFI<\/code>\uff1a\u65e0\u7ebf\u7f51\u7edc\u8fde\u63a5<\/li>\n- 12).
WIMAX<\/code>\uff1awimax\u7f51\u7edc\u8fde\u63a5<\/li>\n- 13).
UNKNOWN<\/code>\uff1a\u672a\u77e5\u7f51\u7edc\u6570\u636e\u8fde\u63a5<\/li>\n<\/ul>\n\u6839\u636e\u6587\u6863\u8bf4\u660e\uff1a\u9664\u6b64\u4e4b\u5916\u7684\u5176\u4ed6\u4e00\u4e9b\u7f51\u7edc\u8fde\u63a5\u72b6\u6001\u5df2\u7ecf\u88abAndroid API\u9690\u85cf\uff0c\u4f46\u662f\u6211\u4eec\u53ef\u4ee5\u5728\u6709\u9700\u8981\u7684\u65f6\u5019\u8fdb\u884c\u4f7f\u7528\u3002<\/p>\n
IOS\u5e73\u53f0\u7684\u7f51\u7edc\u8fde\u63a5\u7c7b\u578b\u72b6\u6001\u5982\u4e0b\uff1a<\/p>\n
\n- 1).
none<\/code>\uff1a\u8bbe\u5907\u6ca1\u6709\u8054\u7f51<\/li>\n- 2).
wifi<\/code>\uff1a\u8bbe\u5907\u8054\u7f51\u5e76\u4e14\u662f\u8fde\u63a5\u7684wifi\u7f51\u7edc\uff0c\u6216\u8005\u5f53\u524d\u662fiOS\u6a21\u62df\u5668<\/li>\n- 3).
cell<\/code>\uff1a\u8bbe\u5907\u8054\u7f51\u662f\u901a\u8fc7\u8fde\u63a5Edge,3G,WiMax\u6216\u8005LET\u7f51\u7edc<\/li>\n- 4).
unknown<\/code>\uff1a\u8be5\u68c0\u6d4b\u53d1\u751f\u5f02\u5e38\u9519\u8bef\u6216\u8005\u7f51\u7edc\u72b6\u6001\u65e0\u4ece\u77e5\u9053<\/li>\n<\/ul>\nNetInfo\u6709\u4e24\u4e2a\u76d1\u542c\uff1a<\/p>\n
\n- \u7f51\u7edc\u72b6\u6001\u6539\u53d8\u7684\u76d1\u542c\uff0c\u56de\u8c03\u5f53\u524d\u7f51\u7edc\u7684\u72b6\u6001<\/li>\n
- \u7f51\u7edc\u662f\u5426\u8fde\u63a5\u7684\u76d1\u542c\uff0c\u56de\u8c03true\u6216false<\/li>\n<\/ul>\n
Android\u72ec\u6709\u7684\u7279\u8272\uff1a<\/p>\n
\nNetInfo.isConnectionExpensive<\/code>\u5224\u65ad\u5f53\u524d\u7f51\u7edc\u662f\u5426\u8ba1\u8d39<\/li>\nAndroidManifest.xml<\/code>\u6587\u4ef6\u4e2d\u6dfb\u52a0\u5982\u4e0b\u6743\u9650\u5b57\u6bb5\uff08\u9700\u91cd\u65b0\u7f16\u8bd1\uff09<\/li>\n<\/ul>\n<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" \/><\/code><\/pre>\n\u6570\u636e\u4ea4\u4e92\uff08\u7f51\u7edc\u8bf7\u6c42\u4e0e\u54cd\u5e94\uff09<\/h2>\n\u6293\u5305\u5de5\u5177<\/h3>\n
\u6293\u5305\u5de5\u5177\uff1ahttpwatch<\/code><\/p>\nIE\u4e2d\u6253\u5f00httpwatch\u7684\u65b9\u6cd5\uff1aShift+F2\uff0c\u6b65\u9aa4 Record Stop Clear<\/p>\n
\u8bf7\u6c42\u534f\u8bae<\/h3>\n
\u901a\u8fc7http\u6216https\u534f\u8bae\u4e0e\u7f51\u7edc\u670d\u52a1\u5668\u4ea4\u4e92\uff0creact native\u96c6\u6210\u4e86node-fetch<\/code>\u5305\u4ee5\u652f\u6301\u5f00\u53d1\u8005\u7684\u8fd9\u79cd\u9700\u6c42<\/p>\n\u7f51\u7edc\u534f\u8bae\uff1ahttp https<\/p>\n
\u8bf7\u6c42\u65b9\u6cd5<\/h3>\n
\u7f51\u7edc\u8bf7\u6c42\u65b9\u6cd5\uff1aget post put delete head trace \u7b49<\/p>\n
Get \u4e0e Post \u7684\u533a\u522b\uff1a<\/p>\n
\n- GET\u4f7f\u7528URL\u6216Cookie\u4f20\u53c2\u3002\u800cPOST\u5c06\u6570\u636e\u653e\u5728BODY\u4e2d\uff1b<\/li>\n
- GET\u7684URL\u4f1a\u6709\u957f\u5ea6\u4e0a\u7684\u9650\u5236\uff0c\u5219POST\u7684\u6570\u636e\u5219\u53ef\u4ee5\u975e\u5e38\u5927\uff1b<\/li>\n
- POST\u6bd4GET\u5b89\u5168\uff0c\u56e0\u4e3a\u6570\u636e\u5728\u5730\u5740\u680f\u4e0a\u4e0d\u53ef\u89c1\u3002<\/li>\n<\/ul>\n
\u5efa\u8bae\uff1a<\/p>\n
\n- Get\u65b9\u5f0f\u7684\u5b89\u5168\u6027\u8f83Post\u65b9\u5f0f\u8981\u5dee\u4e9b\uff0c\u5982\u679c\u5305\u542b\u673a\u5bc6\u4fe1\u606f\uff0c\u5efa\u8bae\u4f7f\u7528Post\u6570\u636e\u63d0\u4ea4\u65b9\u5f0f\uff1b<\/li>\n
- \u5728\u8bf7\u6c42\u6570\u636e\u67e5\u8be2\u65f6\uff0c\u5efa\u8bae\u7528Get\u65b9\u5f0f\uff1b\u800c\u5728\u505a\u6570\u636e\u6dfb\u52a0\u3001\u4fee\u6539\u6216\u5220\u9664\u65f6\uff0c\u5efa\u8bae\u7528Post\u65b9\u5f0f\uff1b<\/li>\n<\/ul>\n
\u6d88\u606f\u5934<\/h3>\n
\u51c6\u5907\u9700\u8981\u4f20\u8f93\u7684\u6d88\u606f\u5934\uff1a\uff08\u6807\u51c6\u6d88\u606f\u5934\u548c\u81ea\u5b9a\u4e49\u6d88\u606f\u5934\uff09<\/p>\n
React Native\u4f7f\u7528http\u534f\u8bae\u6846\u67b6\u652f\u6301Accept-Encoding: gzip, deflate\u683c\u5f0f\u7f16\u7801\uff0c\u5f00\u53d1\u8005\u4e0d\u9700\u8981\u5bf9\u6b64\u8fdb\u884c\u8bbe\u7f6e\u3002<\/p>\n
\u81ea\u5b9a\u4e49\u6d88\u606f\u5934\u53ef\u4ee5\u5728\u4e00\u4e9b\u7ea6\u5b9a\u597d\u7684http\u6d88\u606f\u5934\u4e2d\u586b\u5165\u8eab\u4efd\u8ba4\u8bc1\u4fe1\u606f\u3002<\/p>\n
POST \u63d0\u4ea4\u6570\u636e\u65b9\u5f0f<\/h3>\n\napplication\/x-www-form-urlencoded<\/code>\uff1akey1=val1&key2=val2<\/li>\nmultipart\/form-data<\/code>\uff1aMap\u952e\u503c\u5bf9\u6570\u636e\uff0c\u652f\u6301\u6587\u4ef6<\/li>\napplication\/json<\/code>\uff1aJSON\u6570\u636e<\/li>\ntext\/xml<\/code>\uff1aXML\u6570\u636e<\/li>\n<\/ul>\n\u7f51\u7edc\u8bbf\u95ee API – Fetch<\/h3>\n
React Native\u4e2d\u7684\u7f51\u7edc\u8bbf\u95eeAPI\uff1aFetch<\/code>(\u63a8\u8350)\u3001XMLHttpRequest<\/code><\/p>\nfetch\u662f\u4e00\u4e2a\u66f4\u597d\u7684\u7f51\u7edcAPI\uff0c\u5b83\u7531\u6807\u51c6\u59d4\u5458\u4f1a\u63d0\u51fa\uff0c\u5e76\u5df2\u7ecf\u5728Chrome\u4e2d\u5b9e\u73b0\u3002\u5b83\u5728React Native\u4e2d\u4e5f\u9ed8\u8ba4\u53ef\u4ee5\u4f7f\u7528\u3002fetch\u7684\u8fd4\u56de\u503c\u662f\u4e00\u4e2aPromise\u5bf9\u8c61\uff0c\u4f60\u53ef\u4ee5\u7528\u4e24\u79cd\u529e\u6cd5\u6765\u4f7f\u7528\u5b83\uff1a<\/p>\n
\n- \u4f7f\u7528then\u548ccatch\u6307\u5b9a\u56de\u8c03\u51fd\u6570<\/li>\n
- \u4f7f\u7528ES7\u7684
async\/await<\/code>\u8bed\u6cd5\u53d1\u8d77\u4e00\u4e2a\u5f02\u6b65\u8c03\u7528<\/li>\n<\/ul>\n\n\u6ce8\uff1a\u5982\u679c\u4f60\u7684\u670d\u52a1\u5668\u65e0\u6cd5\u8bc6\u522bPOST multipart\/form-data<\/code>\u7684\u6570\u636e\u683c\u5f0f\uff0c\u90a3\u4e48\u53ef\u4ee5\u5c1d\u8bd5\u4f20\u7edf\u7684application\/x-www-form-urlencoded<\/code>\u683c\u5f0f\uff1a<\/p>\n<\/blockquote>\nmap.body = 'username=test&password=test&act=signin';<\/code><\/pre>\n\u5176\u4ed6\u8bf7\u6c42\u53c2\u6570\u914d\u7f6e<\/p>\n
map.follow = 10; \/\/\u8bbe\u7f6e\u8bf7\u6c42\u5141\u8bb8\u7684\u6700\u5927\u91cd\u5b9a\u5411\u6b21\u6570\uff0c0\u4e3a\u4e0d\u5141\u8bb8\u91cd\u5b9a\u5411\nmap.timeout = 8000; \/\/\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\uff0c0\u4e3a\u6ca1\u6709\u8d85\u65f6\u65f6\u95f4\uff0c\u8fd9\u4e2a\u503c\u5728\u91cd\u5b9a\u5411\u65f6\u4f1a\u88ab\u91cd\u7f6e\nmap.size = 0; \/\/\u8bbe\u7f6e\u8bf7\u6c42\u56de\u5e94\u4e2d\u7684\u6d88\u606f\u4f53\u6700\u5927\u5141\u8bb8\u957f\u5ea6\uff0c0\u4e3a\u6ca1\u6709\u9650\u5236<\/code><\/pre>\nerrTypeError: Network request failed<\/h3>\n
\u4f7f\u7528 fetch \u53d1\u9001 HTTP\u8bf7\u6c42\uff0c\u5982\u679c\u51fa\u73b0\u9519\u8bef\uff1aerrTypeError: Network request failed<\/code><\/p>\n\u5219\u5fc5\u987b\u6dfb\u52a0\u8bf7\u6c42\u5934headers<\/p>\n
let map = {\n method: 'GET',\n headers: {\n 'Accept': 'text\/html,application\/xhtml+xml,application\/xml,application\/json,image\/webp,*\/*;',\n 'Content-Type': 'text\/plain;charset=UTF-8',\n 'User-Agent': 'Mozilla\/5.0 (Windows NT 6.1; WOW64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/44.0.2403.89 Safari\/537.36',\n },\n};<\/code><\/pre>\n\n\u6ce8\u610f\uff1a\u5982\u679c\u4f7f\u7528fetch\u83b7\u53d6\u6570\u636e\uff0c\u65e0\u8bba\u4f7f\u7528\u7684\u662fGET\u65b9\u6cd5\uff0c\u8fd8\u662fPOST\u65b9\u6cd5\uff0c\u90fd\u5fc5\u987b\u6dfb\u52a0\u8bf7\u6c42\u5934headers\u3002\u5f53\u8bf7\u6c42\u4e3aGET\u65f6\u4e0d\u80fd\u5305\u542bbody\uff0c\u5f53\u8bf7\u6c42\u4e3aPOST\u65f6\u5fc5\u987b\u5305\u542bbody\u3002<\/p>\n<\/blockquote>\n
\u7f51\u7edc\u8bbf\u95ee API – XMLHttpRequest<\/h3>\n
XMLHttpRequest \u7684\u5b9e\u73b0\u51e0\u4e4e\u8ddfWeb\u4e00\u6837\uff0c\u552f\u4e00\u7684\u533a\u522b\u5c31\u662f(\u5b89\u5168\u673a\u5236) React Native \u4e2d\u7684XMLHttpRequest\u4e0d\u5b58\u5728\u8de8\u57df\u7684\u9650\u5236\uff0c\u800c\u662f\u4f5c\u4e3a\u5168\u5c40 API \u5b9e\u73b0\u7684\uff0c\u4f60\u53ef\u4ee5\u8bbf\u95ee\u4efb\u4f55\u7f51\u7ad9\u3002\u4f46\u662f\uff0cXMLHttpRequest\u57fa\u4e8eiOS\u7f51\u7edc\u7684\u3002<\/p>\n
let request=new XMLHttpRequest();\nrequest.onreadystatechange = (e)=>{\n if(request.readyState!==4) {\n return ;\n }\n if(request.status===200) {\n alert(request.resonsesText);\n } else {\n alert('\u51fa\u9519\u5566');\n }\n};\nrequest.open('GET','http:\/\/www.rnapp.cc\/');\nrequest.send();<\/code><\/pre>\n\u8303\u4f8b\uff1a<\/p>\n
\/**\n * Sample React Native App\n * https:\/\/github.com\/facebook\/react-native\n * @flow\n *\/\n\nimport React, { Component } from 'react';\nimport {\n AppRegistry,\n StyleSheet,\n Text,\n NetInfo,\n ToastAndroid,\n View\n} from 'react-native';\n\nclass RNAPP extends Component {\n constructor(props) {\n super(props);\n this.state = {\n isConnected: null,\n connectionInfo: null,\n };\n }\n\n componentDidMount() {\n \/\/\u7f51\u7edc\u662f\u5426\u8fde\u63a5\u7684\u76d1\u542c\n NetInfo.isConnected.addEventListener(\n 'isConnected',\n this._handleConnectivityChange\n );\n\n \/\/\u7f51\u7edc\u72b6\u6001\u53d8\u5316\u7684\u76d1\u542c\n NetInfo.addEventListener(\n 'statusChange',\n this._handleNetStatusChange\n );\n\n \/\/\u68c0\u6d4b\u7f51\u7edc\u662f\u5426\u8fde\u63a5\n NetInfo.isConnected.fetch().done(\n (isConnected) => { this.setState({ isConnected: isConnected }); }\n );\n\n \/\/\u68c0\u6d4b\u7f51\u7edc\u8fde\u63a5\u72b6\u6001\n NetInfo.fetch().done(\n (connectionInfo) => { this.setState({ connectionInfo: connectionInfo }); }\n );\n }\n\n componentWillUnmount() {\n \/\/\u5378\u8f7d\u4e24\u4e2a\u76d1\u542c\n NetInfo.isConnected.removeEventListener(\n 'isConnected',\n this._handleConnectivityChange\n );\n NetInfo.removeEventListener(\n 'statusChange',\n this._handleNetStatusChange\n );\n }\n\n _handleConnectivityChange = (isConnected) => {\n this.setState({\n isConnected: isConnected\n });\n ToastAndroid.show((isConnected ? 'online' : 'offline'), ToastAndroid.SHORT);\n }\n\n _handleNetStatusChange = (status) => {\n this.setState({\n connectionInfo: status\n });\n ToastAndroid.show('\u5f53\u7136\u7f51\u7edc\u72b6\u6001\uff1a' + status, ToastAndroid.SHORT);\n }\n\n render() {\n return (\n <View >\n <Text style={styles.welcome}>\u5f53\u524d\u7684\u7f51\u7edc\u72b6\u6001<\/Text>\n <Text style={styles.welcome}>{this.state.isConnected ? '\u7f51\u7edc\u5728\u7ebf' : '\u79bb\u7ebf'}<\/Text>\n <Text style={styles.welcome}>\u5f53\u524d\u7f51\u7edc\u8fde\u63a5\u7c7b\u578b<\/Text>\n <Text style={styles.welcome}>{this.state.connectionInfo}<\/Text>\n <Text style={styles.welcome}>\u5f53\u524d\u7f51\u7edc\u662f\u5426\u8ba1\u8d39(\u4ec5Android\u5e73\u53f0)<\/Text>\n <Text style={styles.welcome}>{NetInfo.isConnectionExpensive === true ? '\u9700\u8981\u8ba1\u8d39' : '\u4e0d\u8981\u8ba1\u8d39'}<\/Text>\n\n <Text onPress={this.goPostNet1.bind(this) } style={styles.btn}>fetch-POST\u8bbf\u95ee\u7f51\u7edc1<\/Text>\n <Text onPress={this.goPostNet2.bind(this) } style={styles.btn}>fetch-POST\u8bbf\u95ee\u7f51\u7edc2<\/Text>\n <Text onPress={this.goGetNet.bind(this) } style={[styles.btn, {backgroundColor: 'blue'}]}>fetch-GET\u8bbf\u95ee\u7f51\u7edc<\/Text>\n <\/View>\n );\n }\n\n goPostNet1() {\n ToastAndroid.show('fetch-POST\u8bbf\u95ee\u7f51\u7edc-\u65b9\u6cd51', ToastAndroid.SHORT);\n let url = 'http:\/\/www.test.com\/login.php';\n let map = { method: 'POST' };\n\n let privateHeaders = {\n 'Private-header1': 'value1',\n 'Private-header2': 'value2',\n 'Content-Type': 'text\/plain',\n 'User-Agent': 'testAgent',\n };\n\n \/\/ map.headers = privateHeaders;\n \/\/post\u7684\u6570\u636e post\u624d\u9700\u8981body\n map.body = JSON.stringify({\n 'username': 'test',\n 'password': 'test',\n 'act': 'signin',\n });\n\n \/\/\u5982\u679c\u4f60\u7684\u670d\u52a1\u5668\u65e0\u6cd5\u8bc6\u522b\u4e0a\u9762POST\u7684\u6570\u636e\u683c\u5f0f\uff0c\u90a3\u4e48\u53ef\u4ee5\u5c1d\u8bd5\u4f20\u7edf\u7684 application\/x-www-form-urlencoded \u683c\u5f0f\n \/\/map.body = 'username=test&password=test&act=signin';\n map.follow = 10; \/\/\u8bbe\u7f6e\u8bf7\u6c42\u5141\u8bb8\u7684\u6700\u5927\u91cd\u5b9a\u5411\u6b21\u6570\uff0c0\u4e3a\u4e0d\u5141\u8bb8\u91cd\u5b9a\u5411\n map.timeout = 8000; \/\/\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\uff0c0\u4e3a\u6ca1\u6709\u8d85\u65f6\u65f6\u95f4\uff0c\u8fd9\u4e2a\u503c\u5728\u91cd\u5b9a\u5411\u65f6\u4f1a\u88ab\u91cd\u7f6e\n map.size = 0; \/\/\u8bbe\u7f6e\u8bf7\u6c42\u56de\u5e94\u4e2d\u7684\u6d88\u606f\u4f53\u6700\u5927\u5141\u8bb8\u957f\u5ea6\uff0c0\u4e3a\u6ca1\u6709\u9650\u5236\n\n console.log('fetch-POST\u8bbf\u95ee\u7f51\u7edc-\u65b9\u6cd51');\n\n fetch(url, map).then(\n (response) => {\n console.log('fetch-\u7b2c\u4e00\u4e2athen\u91cc\u9762');\n return response.text();\n }\n \/\/ (response) => response.text()\n ).then(\n (responseText) => {\n \/\/\u8fd9\u91cc\u4e0d\u80fd\u4f7f\u7528console\u5426\u5219\u770b\u4e0d\u5230\uff0c\u8fd9\u662f\u4e00\u4e2a\u5de8\u5927\u7684\u5751\uff0c\u4f7f\u7528alert\u4e00\u70b9\u95ee\u9898\u6ca1\u6709\n alert('\u670d\u52a1\u5668\u8fd4\u56de\uff1a' + responseText);\n \/\/ console.log('\u670d\u52a1\u5668\u8fd4\u56de\uff1a' + responseText);\n }\n ).catch(\n (err) => {\n console.log('\u9519\u8bef\uff1a' + err);\n }\n );\n }\n\n goPostNet2() {\n ToastAndroid.show('fetch-POST\u8bbf\u95ee\u7f51\u7edc-\u65b9\u6cd52', ToastAndroid.SHORT);\n let url = 'http:\/\/www.test.com\/login.php';\n let data = {\n 'username': 'test',\n 'password': 'test',\n 'act': 'signin',\n };\n console.log('fetch-POST\u8bbf\u95ee\u7f51\u7edc-\u65b9\u6cd52');\n this.postRequest(url, data, (result) => {\n alert('\u670d\u52a1\u5668\u8fd4\u56de\u7ed3\u679c\uff1a' + result);\n \/\/ console.log('\u670d\u52a1\u5668\u8fd4\u56de\u7ed3\u679c\uff1a' + result);\n });\n }\n\n postRequest(url, data, callback) {\n let map = {\n method: 'POST',\n headers: {\n 'Private-header1': 'value1',\n 'Private-header2': 'value2',\n 'Content-Type': 'text\/plain',\n 'User-Agent': 'testAgent',\n },\n body: JSON.stringify(data),\n follow: 20,\n timeout: 8000,\n size: 0,\n };\n\n fetch(url, map).then((response) => response.text()).then(\n (responseText) => {\n callback(responseText);\n }\n ).catch(\n (err) => {\n callback(err);\n }\n );\n }\n\n goGetNet() {\n ToastAndroid.show('fetch-GET\u8bbf\u95ee\u7f51\u7edc', ToastAndroid.SHORT);\n console.log('GET\u8bbf\u95ee\u7f51\u7edc');\n let url = 'http:\/\/www.baidu.com';\n let map = {\n method: 'GET',\n headers: {\n 'Accept': 'text\/html,application\/xhtml+xml,application\/xml,application\/json,image\/webp,*\/*;',\n 'Content-Type': 'text\/plain;charset=UTF-8',\n 'User-Agent': 'Mozilla\/5.0 (Windows NT 6.1; WOW64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/44.0.2403.89 Safari\/537.36',\n },\n };\n fetch(url).then(\n (response) => {\n console.log('\u7b2c\u4e00\u4e2athen\u91cc\u9762');\n return response.text()\n }\n ).then(\n (responseText) => {\n \/\/\u8fd9\u91cc\u4e0d\u80fd\u4f7f\u7528console\u5426\u5219\u770b\u4e0d\u5230\uff0c\u8fd9\u662f\u4e00\u4e2a\u5de8\u5927\u7684\u5751\uff0c\u4f7f\u7528alert\u4e00\u70b9\u95ee\u9898\u6ca1\u6709\n alert('\u670d\u52a1\u5668\u8fd4\u56de\uff1a' + responseText);\n \/\/ console.log('\u670d\u52a1\u5668\u8fd4\u56de\uff1a' + responseText);\n }\n ).catch(\n (err) => {\n console.log('err' + err);\n }\n );\n }\n}\n\nconst styles = StyleSheet.create({\n container: {\n flex: 1,\n justifyContent: 'center',\n alignItems: 'center',\n backgroundColor: '#F5FCFF',\n },\n btn: {\n backgroundColor: '#FF7200',\n height: 33,\n textAlign: 'center',\n textAlignVertical: 'center',\n color: '#fff',\n marginLeft: 10,\n marginRight: 10,\n lineHeight: 24,\n marginTop: 40,\n fontSize: 18,\n },\n welcome: {\n fontSize: 20,\n textAlign: 'center',\n margin: 10,\n },\n instructions: {\n textAlign: 'center',\n color: '#333333',\n marginBottom: 5,\n },\n});\n\nAppRegistry.registerComponent('RNAPP', () => RNAPP);<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"NetInfo\u7f51\u7edc\u8fde\u63a5\u72b6\u6001 \u83b7\u53d6\u7f51\u7edc\u72b6\u6001\u662f\u5f02\u6b65\u7684\uff0c\u4f7f\u7528js\u7684Promise\u673a\u5236 Android\u5e73\u53f0\u7684\u7f51\u7edc\u8fde\u63a5\u7c7b […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[163],"tags":[],"class_list":["post-510","post","type-post","status-publish","format-standard","hentry","category-react-native"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/510","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=510"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/510\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=510"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=510"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}