android WebView onJsAler onJsC…

package com.html;

import com.sqlite.Dao.NcpRegisterDAO;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.webkit.JsResult;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.widget.Toast;


public class Register_protocolActivity extends Activity {
   

    privateHandler mHandler = new Handler();
    privateWebView mWebView;
    privateNcpRegisterDAO dao = null;
    
    public voidonCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       
       //踩上一脚，记录有了就知道复位的时候要去哪里
       dao = new NcpRegisterDAO(Register_protocolActivity.this);
       String name = "MainActivity";
       dao.add_Stepped(name);
       
       //隐藏标题栏
       //requestWindowFeature(Window.FEATURE_NO_TITLE);
       //隐藏状态栏
       //getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
       //该ACTIVITY不需要layout设置，所以直接指向MainActivity的main
       setContentView(R.layout.protocol);
       //将WebView实例化
       mWebView = (WebView) this.findViewById(R.id.webView);
       //WebView打开权限
       mWebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
       mWebView.getSettings().setJavaScriptEnabled(true);
       //WebView，SWF文件运行权限
       mWebView.getSettings().setPluginsEnabled(true);


       mWebView.addJavascriptInterface(new Action(), "ncp"); 
    
      mWebView.loadUrl("file:///android_asset/protocol.html");

      
        
        // 创建WebViewChromeClient
            WebChromeClient wvcc = new WebChromeClient() {          
        // 处理Alert事件
           
           public boolean onJsAlert(WebView view, String url, String message,final JsResult result) {
            // 构建一个Builder来显示网页中的alert对话框
                           Builder builder = newBuilder(Register_protocolActivity.this);
                             builder.setTitle("计算1+2的值");
                             builder.setMessage(message);
                             builder.setPositiveButton(android.R.string.ok, newAlertDialog.OnClickListener() {
                                 @Override
                                 public void onClick(DialogInterface dialog, int which) {
                                     result.confirm();
                                 }
                             });
                            builder.setCancelable(false);
                             builder.create();
                             builder.show();
                             return true;
                         }
           
           
           // 处理Confirm事件
                  public boolean onJsConfirm(WebView view, String url, Stringmessage, final JsResult result) {
                      Builder builder = newBuilder(Register_protocolActivity.this);
                      builder.setTitle("退出确认");
                      builder.setMessage(message);
                      builder.setPositiveButton(android.R.string.ok, newAlertDialog.OnClickListener() {
                          public void onClick(DialogInterface dialog, int which) {
                              //result.confirm();
                           //从协义开始到发送注册信息，这些步骤退出后直接清零复位表，不然如果非正常关机后再重启会再次进入该页
                           dao.Clear_NcpStep_Set0();
                             finish();
                              
                          }