乱码1

package com.witknow.witcontact;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

import org.json.JSONObject;

import com.witknow.util.StringUtils;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.webkit.JavascriptInterface;
import android.webkit.JsResult;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.Toast;

public class witwebviewViewController extends Activity {
private WebView myWebView = null;
private Button myButton = null;
private String callbackjsfunc;
@SuppressLint({ "SetJavaScriptEnabled", "JavascriptInterface" })
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activitywitwebview);

        myWebView = (WebView) findViewById(R.id.myWebView);

        // 得到设置属性的对象
        WebSettings webSettings = myWebView.getSettings();

        // 使能JavaScript
        webSettings.setJavaScriptEnabled(true);

        // 支持中文，否则页面中中文显示乱码
        webSettings.setDefaultTextEncodingName("GBK");

        // 限制在WebView中打开网页，而不用默认浏览器
        myWebView.setWebViewClient(new WebViewClient());
        myWebView.setWebChromeClient(new WebChromeClient()
        {

            @Override
            public boolean onJsAlert(WebView view, String url, String message,
                    JsResult result)
            {
                // TODO Auto-generated method stub
                return super.onJsAlert(view, url, message, result);
            }

        });
        myWebView.addJavascriptInterface(new WebAppInterface(this),
                "witwebview");
        myWebView.loadUrl("file:///android_asset/index.html");

        // 这里用一个Android按钮按下后调用JS中的代码
        myButton = (Button) findViewById(R.id.button1);
        myButton.setOnClickListener(new View.OnClickListener()
        {

            @Override
            public void onClick(View v)
            {
                // 用Android代码调用JavaScript函数：
                myWebView.loadUrl("javascript:myFunction()");

            }
        });

    }
    public class WebAppInterface
    {
        Context mContext;

        /** Instantiate the interface and set the context */
        WebAppInterface(Context c)
        {
            mContext = c;
        }

        /** Show a toast from the web page */
        // 如果target 大于等于API 17，则需要加上如下注解
         @JavascriptInterface
        public void postMessage(String json)
        {
             String num = null,classname="",functioname="",params="";
             Class callclass=null;
             Object obj=null;
             try
             {
                 JSONObject objjson=null;
                 objjson = new JSONObject(json);
                classname=objjson.getString("classname");
                functioname=objjson.getString("functionname");
                params = objjson.getString("params");
                callbackjsfunc=objjson.getString("callback");
                Object my=null;
                my=objjson.get("params");
                //Toast.makeText(getApplicationContext(), params, Toast.LENGTH_SHORT).show();
                //Toast.makeText(getApplicationContext(), my.getClass().toString(), Toast.LENGTH_SHORT).show();
             }
             catch(Exception e)
             {
                 //Toast.makeText(getApplicationContext(),e.getMessage().toString(), Toast.LENGTH_SHORT).show();
                 return;
             }
             //分析 json  
                try 
                {
                    callclass  = Class.forName("com.witknow.witcontact."+classname);
                    obj=callclass.newInstance();//obj指向的A类的对象
                    //Toast.makeText(mContext, "类存在", Toast.LENGTH_SHORT).show();
                }
                catch(Exception e)
                {
                    //Toast.makeText(mContext, "类不存在", Toast.LENGTH_SHORT).show();
                    return;
                }
                
                try
                {
                    
                    Method[] fields = obj.getClass().getDeclaredMethods();//获取对象属性
                      for (Method field : fields) {
                          if(field.getName().toString().equals("output"))
                          {
                             Class[] paramTypes = field.getParameterTypes();//获得一个方法参数数组（getparameterTypes用于返回一个描述参数类型的Class对象数组）
                            for(int j = 0 ; j < paramTypes.length ; j++)
                            {
                                Toast.makeText(mContext,paramTypes[ j ].getName(), Toast.LENGTH_SHORT).show();
                            }
                          }
                          }
                    //Method method = callclass.getDeclaredMethod("output");
                    Object[] objs=null;
                    
                    Class[] argsClass = new Class[2];  
                    argsClass[0]="方法不存在".getClass();
                    argsClass[1]="方法不存在".getClass();
                    Method method = obj.getClass().getMethod("output",argsClass);
                    //Toast.makeText(mContext, "方法存在".getClass().toString(), Toast.LENGTH_SHORT).show();
                }
                catch(Exception e)
                {
                    Toast.makeText(mContext, "方法不存在".getClass().toString(), Toast.LENGTH_SHORT).show();
                    return;
                }
                
             if(!StringUtils.isMobileNO(num))
             {
                 return;
             }
             Intent intent = new Intent(Intent.ACTION_CALL);
             Uri data = Uri.parse("tel:" +num);
             intent.setData(data);
             startActivity(intent);
            // Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();
            //Toast.makeText(mContext, toast, Toast.LENGTH_LONG).show();
        }
    }

private void output(String str,String str2,int age,Integer phone)
{
Toast.makeText(getApplicationContext(), str+","+str2, Toast.LENGTH_SHORT).show();
}
}