Android网络切换状态广播

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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：*

在Activity的onCreate中:
//注册网络监听

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

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);

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