如何使用给定的 ssid 和密码测试 wifi 连接并返回给定 ssid 和密码是否正确的结果

Question

I want to test wifi connection through android app to check whether entered wifi ssid and password is correct or not. How i can check whether the given ssid and password is correct?

Answer 1

Here's what we do in our app:

1. We ensure that the wifi is enabled
2. We create a WifiConfiguration with the ssid and pw (note that WifiConfiguration.SSID and WifiConfiguration.preSharedKey are surrounded in quotes so that if the ssid is example and the pw is password then WifiConfiguration.SSID = "\\"example\\"" and WifiConfiguration.preSharedKey = "\\"password\\""
3. We add the WifiConfiguration to the WifiManager ( WifiManager.addNetwork(WifiConfiguration) )
4. We check the return value (which is a networkId) if it is -1 then the operation was not successful
5. We tell the WifiManager fo enable the networkId from the previous step and attempt to connect ( WifiManager.enableNetwork(netId, true) )

6. We check if the negotiation with this WifiConfiguration was successful. This step has some ugly code, and I would love to get some other ideas, but it works:

    private static boolean checkWifiNegotiation(WifiManager wifiManager, int netId) { boolean startedHandshake = false; boolean successful = false; for (int i = 0; i < 30; i++) { try { Thread.sleep(300); } catch (InterruptedException e) { e.printStackTrace(); } SupplicantState currentState = wifiManager.getConnectionInfo().getSupplicantState(); if (!startedHandshake && currentState.equals(SupplicantState.FOUR_WAY_HANDSHAKE)) { startedHandshake = true; } else if (startedHandshake) { if (currentState.equals(SupplicantState.DISCONNECTED)) { break; } else if (currentState.equals(SupplicantState.COMPLETED)) { successful = true; break; } } wifiManager.enableNetwork(netId, true); } // no matter what happened above, if COMPLETED then we have the correct pw if (!successful && wifiManager.getConnectionInfo().getSupplicantState().equals(SupplicantState.COMPLETED)) { successful = true; } return successful; }