Android判断网络状态

package com.ch.services;

import com.ch.utils.NetWorkUtils;

import android.app.Service;

import android.content.Intent;

import android.os.IBinder;

import android.util.Log;

//这是后台 Service

public class CopyOfOffLineService extends Service{

    @Override

    public int onStartCommand(Intent intent, int flags, int startId) {

        // TODO Auto-generated method stub
        //new一个新类 判断网络

        NetWorkUtils netUtils = new NetWorkUtils(getApplicationContext());

        int i = netUtils.netWorkType();//获得当前网络状态类型

       //1.wifi 2.移动网路 3.没网
        if(i == 1){

            //请求数据，并保存

            Log.i("TAG", "开始离线下载......");

        }else if(i == 2){

            Log.i("TAG", "提示是移动数据，是否继续下载......");

        }else{

            Log.i("TAG", "没网，不需要下载......");

        }

        return super.onStartCommand(intent, flags, startId);

    }

    @Override

    public IBinder onBind(Intent intent) {

        // TODO Auto-generated method stub

        return null;

    }

}

package com.ch.utils;

import android.content.Context;

import android.net.ConnectivityManager;

import android.net.NetworkInfo;

import android.telephony.TelephonyManager;

import android.util.Log;

public class NetWorkUtils {

    Context mcontext;

    public NetWorkUtils(Context mcontext){

        this.mcontext = mcontext;

    }

    public int netWorkType(){
         //获取管理

        ConnectivityManager mConnectivity = (ConnectivityManager)mcontext.getSystemService(Context.CONNECTIVITY_SERVICE);

        TelephonyManager mTelephony = (TelephonyManager)mcontext.getSystemService(Context.TELEPHONY_SERVICE);

        //检查网络连接

        NetworkInfo info = mConnectivity.getActiveNetworkInfo();   

        if (info == null || !mConnectivity.getBackgroundDataSetting()) {

            Log.i("TAG","网络未连接.....");

            return 3;

        } 

        int netType = info.getType();

        int netSubtype = info.getSubtype();

        Log.i("TAG",netType+",,"+netSubtype+",,"+mTelephony.isNetworkRoaming());

        if (netType == ConnectivityManager.TYPE_WIFI) {  //WIFI

            Log.i("TAG","wifi连接.....");

            return 1;

        } else if (netType == ConnectivityManager.TYPE_MOBILE && netSubtype == TelephonyManager.NETWORK_TYPE_UMTS && !mTelephony.isNetworkRoaming()) {   //MOBILE

            Log.i("TAG","移动数据连接.....");

            return 2;

        }

        return 3;

    }

}