1. 如何提示alert
   

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

   
   
   
   
   
2. 其他

js和android交互