1、需要申请的权限

android.permission.ACCESS_WIFI_STATE 

android.permission.CHANGE_WIFI_STATE 

android.permission.WAKE_LOCK



2、获取WifiManager

wifiManager = (WifiManager) this.getSystemService(Context.WIFI_SERVICE); 



3、开启、关闭wifi

if (wifiManager.isWifiEnabled()) {  

wifiManager.setWifiEnabled(false);  

} else {  

wifiManager.setWifiEnabled(true);  

}