android - 'connectionInfo : WifiInfo! 的 getter' 已被弃用。在 Java (Api 31) 中已弃用

Question

当我想通过 WifiManager.connectionInfo 获取有关当前 wifi 连接的信息时，我得到
这个:

'getter for connectionInfo: WifiInfo!' is deprecated. Deprecated in Java

我怎样才能在 Android 12 中做到这一点？ (只想获取rssi)

Answer 1

从 Build.VERSION_CODES#S 开始，WifiInfo 检索被移动到 ConnectivityManager API 表面。 WifiInfo 附加在 NetworkCapabilities#getTransportInfo() 中，可通过 NetworkCallback#onCapabilitiesChanged(Network, NetworkCapabilities) 中的回调或 ConnectivityManager#getNetworkCapabilities(Network) 按需提供。

final NetworkRequest request =
       new NetworkRequest.Builder()
       .addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
       .build();
  final ConnectivityManager connectivityManager =
       context.getSystemService(ConnectivityManager.class);
  final NetworkCallback networkCallback = new NetworkCallback() {
       ...
       @Override
       void onAvailable(Network network) {}
 
       @Override
       void onCapabilitiesChanged(Network network, NetworkCapabilities networkCapabilities) {
           WifiInfo wifiInfo = (WifiInfo) networkCapabilities.getTransportInfo();
       }
       // etc.
  };
  connectivityManager.requestNetwork(request, networkCallback); // For request
  connectivityManager.registerNetworkCallback(request, networkCallback); // For listen

https://developer.android.com/reference/kotlin/android/net/wifi/WifiManager#getConnectionInfo()