WiFi operations and Instances

 

1. What is WiFi Protocol for accessing the Internet using a wireless router 2. obtain the status of the Wi-Fi network card The status of the Wi-Fi network card is represented by a series of plastic constants. Stateful: The value of wifi_state_disabled is 1. The value of wifi_state_disabling being disabled for the NIC is 0. The value of available wifi_state_enabled for the NIC is 3. The value of wifi_state_enabling is 2. The value of the unknown Nic status wifi_state_unknown is 4. 3. permissions required to operate WiFi Note: The permission setting class in Android is manifest. permission. 4. Change the status of the Wi-Fi network card To perform operations on NICs, you must use the core wifimanager object. Important methods: Method to obtain this object: Wifimanager = context. getsystemservice (context. wifi_service ); Enable WiFi Nic Wifimanager. setwifienabled (true ); Disable WiFi Nic Wifimanager. setwifienabled (false ); Obtain the current Nic status Wifimanager. getwifistate (); Set permissions in the main configuration file: <! -- Set the four permissions to access the network status and WiFi status, and change the network status and WiFi status. --> <Uses-Permission Android: Name = "android. Permission. change_network_state"> </uses-Permission> <Uses-Permission Android: Name = "android. Permission. change_wifi_state"> </uses-Permission> <Uses-Permission Android: Name = "android. Permission. access_network_state"> </uses-Permission> <Uses-Permission Android: Name = "android. Permission. access_wifi_state"> </uses-Permission>