Android网络切换状态广播

直接上代码:

    *package com.juyoulicai.forexproduct.Service;

    import android.content.BroadcastReceiver;
    import android.content.Context;
    import android.content.Intent;
    import android.net.ConnectivityManager;
    import android.net.NetworkInfo;
    import android.widget.Toast;

    import com.juyoulicai.eventbus.ForexDateEvent;
    import com.juyoulicai.util.MLog;

    import org.greenrobot.eventbus.EventBus;

    /**
     * 作者: allen on 16/5/30.
     */
    public class ConnectionChangeReceiver extends BroadcastReceiver {
        private static  final String TAG =ConnectionChangeReceiver.class.getSimpleName();
        @Override
        public void onReceive(Context context, Intent intent) {
            MLog.d(TAG,"网络状态改变");
            boolean success =false;
            /**
             * 获得网络连接服务
             */
            ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo.State state =connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();
            if (NetworkInfo.State.CONNECTED==state){
                success =true;
            }
            state =connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState();
            if (NetworkInfo.State.CONNECTED==state){
                success =true;
            }
            if (!success){
                Toast.makeText(context,"网络连接失败",Toast.LENGTH_LONG).show();
                EventBus.getDefault().post(new ForexDateEvent(ForexDateEvent.NetworkInfoState,false));
            } else {
                EventBus.getDefault().post(new ForexDateEvent(ForexDateEvent.NetworkInfoState,true));
            }
        }
    }

记得在Manifest文件里面进行权限声明，和广播接收器注册。

< !– Needed to check when the network connection changes –>

< uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>   
< receiver android:name="you_package_name.ConnectionChangeReceiver"   android:label="NetworkConnection">   
< intent-filter>   
      < action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>   
< /intent-filter>   
< /receiver> 

* 使用方式一：*

1. 在Activity的onCreate中:
   //注册网络监听

   IntentFilter filter = new IntentFilter();  
   filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION); 
   registerReceiver(mNetworkStateReceiver, filter); 
   

2. 在Activity中的onDestroy中:
   //取消监听

   unregisterReceiver(mNetworkStateReceiver); 
   

使用方式二：
1. 应用启动时，启动Service，在Service的onCreate方法中注册网络监听：
//注册网络监听

IntentFilter filter = new IntentFilter();  
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION); 
registerReceiver(mNetworkStateReceiver, filter); 

2. 应用退出时，Service关闭，在Service的onDestroy方法中取消监听：
//取消监听

    unregisterReceiver(mNetworkStateReceiver);