WIFI、3G、2G网络连接判断深入分析

广告载入、软件在线更新、网络编程都需要检测网络的类型。对于WIFI和3G 2G的判断一直很困惑，下午花了几个小时，完成以下测试。测试手机为MT15I+WIFI+移动2G，屌丝用不起3G，有条件的朋友可以跟贴追加3G网络测试结果。

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.NetworkInfo.State;
import android.telephony.TelephonyManager;
import android.util.Log;
public class NetWork {
//以下判断函数测试结果。
   //1.开WIFI关闭GPRS，                                                                isWifi()Active()=true,G2G3()=10000,isNetworkAvailable()=true,isWifi()Enabled()=true,isWifi()=true,is3G()=false
   //2.先开GPRS 开WIFI但不能连 ，UC不能上网              isWifi()Active()=false,G2G3()=2,   isNetworkAvailable()=true,isWifi()Enabled()=true,isWifi()=false,is3G()=true
   //3.先开GPRS再开手机无线热点                                                  isWifi()Active()=false,G2G3()=2,   isNetworkAvailable()=true,isWifi()Enabled()=true,isWifi()=false,is3G()=true
   //4 先关GPRS再开手机无线热点                                                    isWifi()Active()=false,G2G3()=1000,isNetworkAvailable()=false,isWifi()Enabled()=false,isWifi()=false,is3G()=false
   //5.同时打开WIFI与GPRS                 isWifi()Active()=false,G2G3()=1000,isNetworkAvailable()=false,isWifi()Enabled()=false,isWifi()=false,is3G()=false
   //6.同时打开WIFI与GPRS，但无WIFI网络 UC可上网   isWifi()Active()=false,G2G3()=2   ,isNetworkAvailable()=true,isWifi()Enabled()=true,isWifi()=false,is3G()=true  

public static int G3G2(Context context) {
  ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
  NetworkInfo info = connectivity.getActiveNetworkInfo();
  if (info != null && info.getType() == ConnectivityManager.TYPE_MOBILE) {
   if (info.getSubtype() == TelephonyManager.NETWORK_TYPE_GPRS || info.getSubtype() == TelephonyManager.NETWORK_TYPE_CDMA || info.getSubtype() == TelephonyManager.NETWORK_TYPE_EDGE) {
    Log.i("tag", "mobile connected " + info.getSubtype());
   } else {
    Log.i("tag", " not mobile");
   }
   return info.getSubtype();
  } else
   Log.i("tag", "not mobile connected ");
  return 10000;
  // return 1联通2G 2移动2G 4电信2G 5 6 12电信3G 83 联通3G 13LTE 11 IDEN 9HSUPA 10 HSPA 15HSPAP
}
// 下面这个有人说真机可用
public static boolean isWifiActive(Context inContext) {
  Context context = inContext.getApplicationContext();
  ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
  if (connectivity != null) {
   NetworkInfo[] info = connectivity.getAllNetworkInfo();
   if (info != null) {
    for (int i = 0; i < info.length; i++) {
     if (info.getTypeName().equals("WIFI") && info.isConnected()) {
      return true;
     }
    }
   }
  }
  return false;
}
// 网络是否可用
public static boolean isNetworkAvailable(Context context) {
  ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
  if (connectivity == null) {
  } else {
   NetworkInfo[] info = connectivity.getAllNetworkInfo();
   if (info != null) {
    for (int i = 0; i < info.length; i++) {
     if (info.getState() == NetworkInfo.State.CONNECTED) {
      return true;
     }
    }
   }
  }
  return false;
}
// public void CheckNetworkState() {//getsystemservice 只能用于ACTIVITY，需要用的朋友自己去ACTIVITY测试
// boolean flag = false;
// ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
// State mobile = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState();
// State wifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();
// // 如果3G、wifi、2G等网络状态是连接的，则退出，否则显示提示信息进入网络设置界面
// if (mobile == State.CONNECTED || mobile == State.CONNECTING)
// return;
// if (wifi == State.CONNECTED || wifi == State.CONNECTING)
// return;
// }
public static boolean isWifiEnabled (Context context) {
  ConnectivityManager mgrConn = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
  TelephonyManager mgrTel = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
  return ((mgrConn.getActiveNetworkInfo() != null && mgrConn.getActiveNetworkInfo().getState() == NetworkInfo.State.CONNECTED) || mgrTel.getNetworkType() == TelephonyManager.NETWORK_TYPE_UMTS);
}
public static boolean isWifi (Context context) {
  ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
  NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
  if (activeNetInfo != null && activeNetInfo.getType() == ConnectivityManager.TYPE_WIFI) {
   return true;
  }
  return false;
}
public static boolean is3G(Context context) {
  ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
  NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
  if (activeNetInfo != null && activeNetInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
   return true;
  }
  return false;
}




测试不容易，花了几小时，特分享出来，觉得好用请顶个贴。