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();
                              
                          }
        
                      });
                      builder.setNeutralButton(android.R.string.cancel, newAlertDialog.OnClickListener() {
        
                       public void onClick(DialogInterface dialog, int which) {
                              result.cancel();
                          }
        
                      });
                      builder.setCancelable(false);
                      builder.create();
                      builder.show();
                      return true;
                  }
           
        };
      //设置setWebChromeClient对象
        mWebView.setWebChromeClient(wvcc);
      
      
      
    }
    
    final classAction {  
       
      Action() {  
       }  
        
       public void clickOnAndroid_register() {  
          mHandler.post(new Runnable() {  
               public void run() {  
                  //mWebView.loadUrl("javascript:wave()");          
                   Toast.makeText(getBaseContext(), "欢迎进入注册！",Toast.LENGTH_SHORT).show();
                   //Intent intent = newIntent(MainActivity.this,Register.class);
                   Intent intent = newIntent(Register_protocolActivity.this,Register_IDcard.class);
                   Register_protocolActivity.this.startActivity(intent);
                 //设置切换动画，从右边进入，左边退出
                overridePendingTransition(R.xml.in_from_right,R.xml.out_to_left);
                
               }  
           });  
       }   
       
       
       public void clickOnAndroid_quit() {  
           mHandler.post(new Runnable() {  
                public void run() {  
                   finish();
                }  
            });  
        }
    } 

    //禁止回退
    public voidonBackPressed() {
              // TODO Auto-generated method stub
              return;
              //super.onBackPressed();
    }
    
   @Override
    protectedvoid onStop() {
       super.onStop();
       System.out.println("onStop!!");
       finish();
       // The activity is no longer visible (it is now "stopped")
    }

}