Android使用BroadcastReceiver监听网络连接状态的改变

package huaxa.it.map.net;

import huaxa.it.map.demo.MapDemo;

import com.baidu.mapapi.map.MapView;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.NetworkInfo.State;
import android.net.wifi.WifiInfo;
import android.util.Log;
import android.widget.Toast;

/**
 * @项目名： ZhiHUIGuangDong
 * @包名： huaxa.it.zhihuiguangdong
 * @类名： NetState
 * @创建者： 黄夏莲
 * @创建时间： 2016年10月22日 ,上午1:10:16
 * 
 * @描述： TODO
 */
public class NetState extends BroadcastReceiver
{

 public int flag = 0;
 private int flag1=0;

 @Override
 public void onReceive(Context context, Intent arg1)
 {
  ConnectivityManager manager = (ConnectivityManager) context
    .getSystemService(Context.CONNECTIVITY_SERVICE);
  NetworkInfo activeNetworkInfo = manager.getActiveNetworkInfo();
  if (activeNetworkInfo == null)
  {
   Toast.makeText(context, "当前无网络，请检查移动设备的网络连接", Toast.LENGTH_SHORT)
     .show();
   flag = 1;
   flag1 = 1;
   Log.i("TAG","网络未连接+flag+"+flag);
  }
  // activeNetworkInfo.getTypeName(); 以何种方式连线
  // :cmwap/cmnet/wifi/uniwap/uninet
  // activeNetworkInfo.isAvailable(); 当前网络是否可用(true)
  // activeNetworkInfo.isFailover();网络有问题
  else
  {
   if (!activeNetworkInfo.isAvailable()
     || activeNetworkInfo.isFailover())
   {
    Toast.makeText(context, "当前网络不可用", Toast.LENGTH_SHORT).show();
    flag = 1;
    flag1=2;
    Log.i("TAG","当前网络不可用flag+"+flag);
   }

   if (flag == 1)
   {
    if (activeNetworkInfo.getType() == ConnectivityManager.TYPE_MOBILE)
    {
     Toast.makeText(context, "已连接上移动数据", Toast.LENGTH_SHORT)
       .show();
    } else
    {
     Toast.makeText(context, "已连接上WIFI数据", Toast.LENGTH_SHORT)
       .show();
    }
    Log.i("TAG","网络ok,flag+"+flag+"....."+flag1);
   }

  }
 }
}

NetState receiver = new NetState();
IntentFilter filter = new IntentFilter();
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
this.registerReceiver(receiver, filter);//注册
receiver.onReceive(this, null);//接收

String Action = "xxxxxx";//xxxxxx指的是自定义的Broadcast的action属性，如com.annyAndroid.broadcastdemo.action.USER_BROADCAST，随便定义，但是在广播接收器的intentfilter中的action属性必须和这个一致
Intent intent = new Intent();
intent.putExtra("user","huaxa");//key-Value
sendBroadcast(intent);

public class AAAAA extends Broadcast Receiver{
 @Override
 onReceive(Context context,Intent intent){
 //处理广播事件
 ......
 }
}

IntentFilter filter = new IntentFilter(xxxx);//添加事件的ACTION，如电池电量、网络连接变化、有来电、短信息等
AAAAA aAAAA = new AAAAA();
registerReceiver(aAAAA,filter);//注册

if (connectionReceiver != null) {
 unregisterReceiver(connectionReceiver);
 }