在JS中调用Java方法：
(1) 首先为JS提供接口
WebView webView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webView = (WebView) findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
webView.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY);
webView.loadUrl(" file:///android_asset/js/index.html ");
webView.addJavascriptInterface(new AndroidToastForJs(MainActivity.this), "demo");
}
public class AndroidToastForJs {
private Context mContext;
public AndroidToastForJs(Context context) {
this.mContext = context;
}
@JavascriptInterface
public String getTitle(){
return "This is Titl";
}
@JavascriptInterface
public String getContent(){
return "this is content ,this is contentthis is contentthis is content";
}
@JavascriptInterface
public String getStatement(){
return "this is statement";
}
}将这个接口对象传给JS( WebKit )
webView.addJavascriptInterface(new AndroidToastForJs(MainActivity.this), "demo");
于是，现在JS知道了一个叫做“demo”的接口类可以供他使用
(2)在JS中调用Java方法：
<html lang="en">
<!-- By ElyarAnwar-->
<script>
window.onload = function(){getTitle();getContent();getStatement()};
function getTitle() {
var title = document.getElementById(‘title‘);
title.innerHTML = window.demo.getTitle();
}
function getContent(){
var content = document.getElementById(‘content‘);
content.innerHTML = window.demo.getContent();
}
function getStatement(){
var statement = document.getElementById(‘statement‘);
statement.innerHTML = window.demo.getStatement();
}
</script>
<head>
<meta charset="UTF-8">
<title>Title</title>
<link rel="stylesheet" href="bootstrap.min.css">
</head>
<body>
<!-- Begin page content -->
<div class="container">
<div class="page-header text-center" style="font-family: SketchRockwell">
<h4><span><strong id="title"></strong></span></h4>
</div>
<p id="content" class="lead text-justify" style="font-family: SketchRockwell"></p>
</div>
<footer class="footer">
<div class="container">
<p id="statement" class="text-muted text-right" style="font-family: ‘SketchRockwell"></p>
</div>
</footer>
</body>
</html>完成在JS中调用Java方法！
图：
本文出自 “分享是最好的记忆” 博客，谢绝转载！
Android分享笔记(5) Android 与 JS 交互
原文：http://elyar.blog.51cto.com/9864306/1752300