android WebView中js的alert()失效

WebView的设置代码

wv = (WebView) findViewById(R.id.webView1); wv.getSettings().setJavaScriptEnabled(true);//支持js wv.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);//允许js弹出窗口 wv.loadUrl("http://www.google.com"); wv.setWebViewClient(new WebViewClient()); 

还需要做如下设置，通过这样的转换为android内部的控件的

webView.setWebChromeClient(new WebChromeClient() {     @Override     public boolean onJsAlert(WebView view, String url, String message, final JsResult result) {         AlertDialog.Builder b2 = new AlertDialog.Builder(this)                 .setTitle(R.string.title).setMessage(message)                 .setPositiveButton("ok",                         new AlertDialog.OnClickListener() {                             @Override                             public void onClick(DialogInterface dialog,                                     int which) {                                 result.confirm();                                 // MyWebView.this.finish();                             }                         });
        b2.setCancelable(false);         b2.create();         b2.show();         return true;     } }