android ping 百度,用模拟器Ping百度怎么ping不通

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下面是代码

package com.example.network;

import java.io.IOException;

import android.content.Context;

import android.util.Log;

import android.widget.Toast;

public class PingIp {

public static boolean startPing(String ip, Context activity){

Log.e("Ping", "startPing...");

boolean success=false;

Process p =null;

Context context=activity.getApplicationContext();

try {

p = Runtime.getRuntime().exec("/system/bin/ping -c 1 -i 0.2 -W 1 " +ip);

int status = p.waitFor();

if (status == 0) {

success=true;

Log.e("Ping", "chenggong");

Toast.makeText(context,"连接成功",Toast.LENGTH_LONG).show();

} else {

success=false;

Log.e("Ping", "shibai");

Toast.makeText(context,"连接不到服务器",Toast.LENGTH_LONG).show();

}

} catch (IOException e) {

success=false;

} catch (InterruptedException e) {

success=false;

}finally{

p.destroy();

}

return success;

}

}