NetworkInfo类,判断网络类型，获取WIFI名称，网速，网络信号，IP地址，MAC地址

package shared;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;

public class Network {

public static int getNetworkType(Context ct) {   	//-1:ConnectivityManager.TYPE_NONE  0:ConnectivityManager.TYPE_MOBILE  1:ConnectivityManager.TYPE_WIFI  -1——14
ConnectivityManager manager = (ConnectivityManager) ct.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkinfo = manager.getActiveNetworkInfo();
if (networkinfo != null && networkinfo.isAvailable()) return networkinfo.getType(); else return -1;
}

public static Object[] getWifiInfo(Context ct) {      // [String:Name,int:Signal,int:Speed,String:SpeedUnits,String:ip,String:Mac]
WifiManager wifiManager = (WifiManager) ct.getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
if (wifiInfo.getBSSID() == null) return null;
else{
int i = wifiInfo.getIpAddress();
return new Object[]{wifiInfo.getSSID(),WifiManager.calculateSignalLevel(wifiInfo.getRssi(), 4),wifiInfo.getLinkSpeed(),WifiInfo.LINK_SPEED_UNITS,(i&0xFF)+"."+((i>>8)&0xFF)+"."+((i>>16)&0xFF)+"."+(i>>24&0xFF),wifiInfo.getMacAddress()};
}
}

}

<receiver android:name=".NetworkBroadcast" android:enabled="true" >
<intent-filter >
<action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>
</intent-filter>
</receiver>

package com.dadi58;

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

public class NetworkBroadcast extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
switch(Network.getNetworkType(context)){
case ConnectivityManager.TYPE_MOBILE:Toast.makeText(context, "手机网络连接成功！", Toast.LENGTH_LONG).show();break;
case ConnectivityManager.TYPE_WIFI:Toast.makeText(context, "无线网络连接成功！", Toast.LENGTH_LONG).show();break;
case -1:Toast.makeText(context, "没有任何网络！", Toast.LENGTH_LONG).show();break;
}
}
}