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-ValuesendBroadcast(intent);

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

<receiver android:name=".MyReceiver">    <intent-filter>     <action android:name="xxxxxxxx"/>    <!--xxxxx广播事件的Action属性 -->   </intent-filter> </receiver> 

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); }