android 判断是否有可用网络连接

判断wifi网络是否链接




1publicstaticboolean isWiFiActive(Context inContext) {
2 WifiManager mWifiManager = (WifiManager) inContext
3 .getSystemService(Context.WIFI_SERVICE);
4 WifiInfo wifiInfo = mWifiManager.getConnectionInfo();
5int ipAddress = wifiInfo ==null?0 : wifiInfo.getIpAddress();
6if (mWifiManager.isWifiEnabled() && ipAddress !=0) {
7 System.out.println("**** WIFI is on");
8returntrue;
9 } else {
10 System.out.println("**** WIFI is off");
11returnfalse; 
12 }
13}

判断3G网络是否链接

  

publicstaticboolean isNetworkAvailable( Context context) {
ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity ==null) {
System.out.println("**** newwork is off");
returnfalse;
} else {
NetworkInfo info = connectivity.getActiveNetworkInfo();