public class NetWorkStateReceiver extends BroadcastReceiver {

    @Override

    public void onReceive(Context context, Intent intent) {

        System.out.println("网络状态发生变化");

        //检测API是不是小于23，因为到了API23之后getNetworkInfo(int networkType)方法被弃用

        if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.LOLLIPOP) {

            //获得ConnectivityManager对象

            ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

            //获取ConnectivityManager对象对应的NetworkInfo对象

            //获取WIFI连接的信息

            NetworkInfo wifiNetworkInfo = connMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);

            //获取移动数据连接的信息

            NetworkInfo dataNetworkInfo = connMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

            if (wifiNetworkInfo.isConnected() && dataNetworkInfo.isConnected()) {

                Toast.makeText(context, "WIFI已连接,移动数据已连接", Toast.LENGTH_SHORT).show();

            } else if (wifiNetworkInfo.isConnected() && !dataNetworkInfo.isConnected()) {

                Toast.makeText(context, "WIFI已连接,移动数据已断开", Toast.LENGTH_SHORT).show();

            } else if (!wifiNetworkInfo.isConnected() && dataNetworkInfo.isConnected()) {

                Toast.makeText(context, "WIFI已断开,移动数据已连接", Toast.LENGTH_SHORT).show();

            } else {

                Toast.makeText(context, "WIFI已断开,移动数据已断开", Toast.LENGTH_SHORT).show();

            }

//API大于23时使用下面的方式进行网络监听

        }else {

            System.out.println("API level 大于23");

            //获得ConnectivityManager对象

            ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

            //获取所有网络连接的信息

            Network[] networks = connMgr.getAllNetworks();

            //用于存放网络连接信息

            StringBuilder sb = new StringBuilder();

            //通过循环将网络信息逐个取出来

            for (int i=0; i < networks.length; i++){

                //获取ConnectivityManager对象对应的NetworkInfo对象

                NetworkInfo networkInfo = connMgr.getNetworkInfo(networks[i]);

                sb.append(networkInfo.getTypeName() + " connect is " + networkInfo.isConnected());

            }

            Toast.makeText(context, sb.toString(),Toast.LENGTH_SHORT).show();

        }

    }

}

<uses-sdk>

            <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

        </uses-sdk>