在android上檢查互聯網連接是通過Wifi還是通過GSM/3G？

Question

如何使用代碼檢查連接是通過Wifi還是Android/GSM/3G？

Answer 1

從這裏：Detect network connection type on Android

// Only update if WiFi or 3G is connected and not roaming 
int netType = info.getType(); 
int netSubtype = info.getSubtype(); 

if (netType == ConnectivityManager.TYPE_WIFI) { 
    return info.isConnected(); 
} else if (netType == ConnectivityManager.TYPE_MOBILE 
     && netSubtype == TelephonyManager.NETWORK_TYPE_UMTS 
     && !mTelephony.isNetworkRoaming()) { 
    return info.isConnected(); 
} else { 
    return false; 
} 

Answer 2

更重要的是，你可以使用TelephonyManager。

TelephonyManager tm = (TelephonyManager) 
getSystemService(TELEPHONY_SERVICE); 
String operatorname = tm.getNetworkOperatorName(); 

請檢查該鏈接http://developer.android.com/reference/android/telephony/TelephonyManager.html