Android Learning note-detects if it's a WiFi environment

Connectivitymanager cm = (Connectivitymanager) getsystemservice (Context.connectivity_service);

Get the Networkinfo object that represents the networked state

Networkinfo wifiinfo = Cm.getnetworkinfo (Connectivitymanager.type_wifi);

return wifiinfo! = null && wifiinfo.isconnected ()

True is the WiFi environment, and can be used normally, otherwise WiFi is not available

Connectivitymanager main management and network connection related operations

The Networkinfo class contains a detailed description of the WiFi and mobile two network mode connections, and the state object obtained through its GetState () method represents

The status of the connection success or not.

1. /Jump to the wireless network Settings screen
2. StartActivity (new Intent (Android.provider.Settings.ACTION_WIRELESS_SETTINGS));
3. //Jump to the unlimited WiFi network Settings screen
4. StartActivity (new Intent (Android.provider.Settings.ACTION_WIFI_SETTINGS));

Context context = Mainactivity.getapplicationcontext ();//Get Application context
Connectivitymanager Connectivitymanager = ( Connectivitymanager) Context
. Getsystemservice (Context.connectivity_service);//Get the system's connection service
Networkinfo Networkinfo = Connectivitymanager.getactivenetworkinfo ();//Gets the connection condition of the network
if ( networkinfo.gettype () = = Connectivitymanager.type_wifi) {
//determine WIFI network
}else if ( networkinfo.gettype () ==connectivitymanager.type_ MOBILE) {
//judging 3G net
}