Android-verify that the Network is available

Connectivitymanager mainly manages network connection-related operations. The networkinfo class includes a detailed description of the two network modes of WiFi and mobile, through its getstate () the State object obtained by the method indicates whether the connection is successful or not.

CONNECTED

Detailed state	Coarse-grained state
IDLE	DISCONNECTED
SCANNING	CONNECTING
CONNECTING	CONNECTING
AUTHENTICATING	CONNECTING
CONNECTED
DISCONNECTING	DISCONNECTING
DISCONNECTED	DISCONNECTED
UNAVAILABLE	DISCONNECTED
FAILED	DISCONNECTED

State state = connectivitymanager. getnetworkinfo (connectivitymanager. type_mobile). getstate ();
If (State. Connected = State ){
Log. I ("tag", "GPRS network connected ");
}

State = connectivitymanager. getnetworkinfo (connectivitymanager. type_wifi). getstate ();
If (State. Connected = State ){
Log. I ("tag", "Wi-Fi network connected ");
}
// Determine whether the Network is available </P> <p> Public static Boolean isnetworkavaiable (context) {<br/> connectivitymanager = (connectivitymanager) context. getsystemservice (connectivity_service); <br/> networkinfo info = connectivitymanager. getactivenetworkinfo (); // get the networkinfo object that represents the networking status <br/> return (info! = NULL & info. isconnected (); <br/>}</P> <p> // determines whether WiFi is available </P> <p> Public static Boolean iswifiactive (context) {</P> <p> connectivitymanager = (connectivitymanager) context. getsystemservice (connectivity_service); <br/> networkinfo [] info = connectivitymanager. getallnetworkinfo (); <br/> If (info! = NULL) {<br/> for (INT I = 0; I <info. length; I ++) {<br/> // <br/> If (info [I]. gettypename (). equals (connectivitymanager. type_wifi) & info [I]. isconnected () <br/> return true; <br/>}< br/> return false; <br/>}< br/>

Connectivitymanager. type_wifi indicates a Wi-Fi connection.

Connectivitymanager. type_mobile indicates a 3G connection.

Network Settings intent:

New intent (Android. provider. settings. action_wireless_settings)
// Jump to the wireless network settings page

New intent (Android. provider. settings. action_wifi_settings) // jump to the Wireless WiFi network settings page

Finally, do not forget to add the permission to the mainifest file:

"<Uses-Permission Android: Name =" android. Permission. access_network_state "/>"