JavaScript 可以调用 Android 里的代码，Android 也可以调用 JavaScript 的方法。
示例：
index.html
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<body>
<script>
function androidCallBack(title)
{
document.getElementById('btnOK').value = title;
}
function command()
{
window.android.clickOnAndroid('aa1');
}
</script>
<input id="btnOK" type="button" value="
确定
" onclick="command()"/>
</body>
</html>
Android:
private Handler mHandler = new Handler();
private WebView web1;
private String value1;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.web1 = (WebView) this.4ndViewById(R.id.Web1);
this.web1.setWebViewClient(new WebViewClient()
{
public boolean shouldOverrideUrlLoading(WebView view, String url)
{
view.loadUrl(url);
return true;
}
});
this.web1.getSettings().setJavaScriptEnabled(true);
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