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Android与JS之间跨平台异步调用

 为什么突然要搞这个问题呢?

   在开发浏览器的时候遇到这个狗血的问题,花了将近1天的时间才想到这个解决方案,Android与JavaScirpt互调。

  因为接口是抓取的别人的,所以出现了JS跨域问题,Android闪亮登场搞定了。

 

 GIF动画演示

  

 

 WebView相关设置

WebSettings mWebSettings = getSettings();
mWebSettings.setDefaultTextEncodingName("UTF-8");//设置默认的显示编码

mWebSettings.setJavaScriptEnabled(true);//调用JS方法.安卓版本大于17,加上注解 @JavascriptInterface


 直接放大招->贴代码

 Android

  

 1         addJavascriptInterface(new Object() {
 2             @JavascriptInterface
 3             public void toastMessage(final String url, final int type, final int dir) {
 4                 L.e("url = " + url + " type = " + type + " dir = " + dir);
 5                 APIWrapper.getInstance()
 6                         .getLenovoWord(url)
 7                         .subscribeOn(Schedulers.io())
 8                         .observeOn(AndroidSchedulers.mainThread())
 9                         .subscribe(new RxSubscriber<ResponseBody>() {
10                             @Override
11                             public void _onNext(ResponseBody responseBody) {
12                                 try {
13                                     String data = responseBody.string();
14                                     L.e("data = " + data);
15                                     loadUrl("javascript:ResCompleted(" + data + "," + type + "," + dir + ")");
16                                 } catch (IOException e) {
17                                     e.printStackTrace();
18                                 }
19                             }
20 
21                             @Override
22                             public void _onError(String msg) {
23                                 loadUrl("javascript:ResCompleted(" + msg + ")");
24                             }
25                         });
26             }
27         }, "Android");
View Code

 

 Html

 

 1 <html>
 2 <meta name="viewport"
 3       content="width=device-width,height=device-height,inital-scale=1.0,maximum-scale=1.0,user-scalable=no;">
 4 <head>
 5 
 6     <title>Js调用Android代码</title>
 7     <style>
 8         #button-call{
 9         width: 100%;
10         padding: 20px;
11         font-size: 20px;
12         }
13         #div_bg{
14         background: #cccccc;
15         margin-top: 50px;
16         }
17     </style>
18     <script type="text/javascript">
19         window.onload=function() {
20             document.getElementById('button_call').onclick=function(){
21                 window.Android.toastMessage("http://api.sina.cn/sinago/list.json?channel=news_toutiao",1, 0);
22             }
23         }
24 
25         function ResCompleted(result,type,dir) {
26             document.getElementById('div_bg').innerHTML='Android调用JS代码-成功!!!'+JSON.stringify(result);
27         }
28 
29     </script>
30 </head>
31 
32 <body>
33 <button id="button_call">Js调用Android代码</button>
34 <div id="div_bg"></div>
35 </body>
36 
37 </html>
View Code

 

 

 

 

 

 

 

 

 

 

 

 

 
 
posted @ 2016-09-08 15:56  浩友  阅读(2650)  评论(0编辑  收藏  举报