背景：需要向其他人隐藏wifi名称，然后特定情况下应用自动连接此隐藏wifi
首先，需要知道wifi的ssid、password
WifiConfiguration conf = new WifiConfiguration();
Log.d("Aut", param.getSsid() + " : " + param.getPasswd());
conf.SSID = """ + param.getSsid() + """;
conf.preSharedKey = """ + param.getPasswd() + """;
conf.hiddenSSID = true; // Put this line to hidden SSID
conf.status = WifiConfiguration.Status.ENABLED;
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
conf.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
// Connect Network
// this.wifiManager =(WifiManager)getApplicationContext().getSystemService(Context.WIFI_SERVICE);
assert mWifiManager != null;
int netId = mWifiManager.addNetwork(conf);
WifiInfo wifi_inf = mWifiManager.getConnectionInfo();
mWifiManager.disableNetwork(wifi_inf.getNetworkId());
mWifiManager.enableNetwork(netId, true);
mWifiManager.reconnect();
注意添加 conf.hiddenSSID = true; // Put this line to hidden SSID，一般的网络连接是先要从能够搜到ssid的网络中去添加，然后进行enableNetwork，但是如果是隐藏掉的wifi，搜不到此名称，连接还是会失败
