Android - 如何使用 SSID 和密码连接 Wi-Fi

Question

我从用户那里获取 SSID 和密码作为输入。 我想创建一个返回连接成功或无效凭据的 function connectWifi(String SSID, String password) 。 使用 SSID 和密码连接 Wi-Fi 的最佳方式是什么？

Answer 1

您可以尝试以下代码片段来检查可用的 wifi 网络并连接到指定的 wifi 网络。

List<ScanResult> wifiScanList = wifi.getScanResults();
         wifis = new String[wifiScanList.size()];

         for(int i = 0; i < wifiScanList.size(); i++){
            wifis[i] = ((wifiScanList.get(i)).SSID);                

            if(wifis[i].equals("WiredSSID")) {

                 WifiConfiguration wifiConfig = new WifiConfiguration();
                 wifiConfig.SSID = String.format("\"%s\"", wifis[i]);
                 wifiConfig.preSharedKey = String.format("\"%s\"", "password");

                 WifiManager wifiManager = (WifiManager)getSystemService(WIFI_SERVICE);
                 //remember id
                 int netId = wifiManager.addNetwork(wifiConfig);
                 wifiManager.disconnect();
                 wifiManager.enableNetwork(netId, true);
                 wifiManager.reconnect();
             }
         }

而且您还必须检查正确的权限！

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>

Answer 2

我们可以使用以下方法使用提供的密码连接wifi

String connectWifi(String ssid, String password){
   WifiConfiguration wifiConfig = new WifiConfiguration();
   wifiConfig.SSID = String.format("\"%s\"", ssid);
   wifiConfig.preSharedKey = String.format("\"%s\"", password);
   WifiManager wifiManager = (WifiManager)getSystemService(WIFI_SERVICE);
   //remember id
   int netId = wifiManager.addNetwork(wifiConfig);
   wifiManager.disconnect();
   wifiManager.enableNetwork(netId, true);

   boolean isConnectionSuccessful = wifiManager.reconnect();

   if(isConnectionSuccessful){
       return "connection successful";
   }else{
       return "invalid credential";
   }
}

Answer 3

你可以用这个 function 用于 android 10 及以上

private fun connectToYourWifi(ssid: String, password:String) {

        val wifiNetworkSpecifier = WifiNetworkSpecifier.Builder()
            .setSsid(ssid)
            .setWpa2Passphrase(password)
            .build()

        val networkRequest = NetworkRequest.Builder()
            .addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
            .setNetworkSpecifier(wifiNetworkSpecifier)
            .build()

        val connectivityManager =
            applicationContext!!.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
        connectivityManager.requestNetwork(networkRequest, ConnectivityManager.NetworkCallback())
    }

此代码打开默认对话框以连接您要连接的特定 wifi。