SDK22中已弃用NetworkInfo和WifiConfiguration
SDK22中已弃用NetworkInfo和WifiConfiguration
提问于 2021-07-09 21:09:22
我在PAX A920设备上使用安卓棒棒糖(SDK版本22)。在构建时，我收到类似如下的警告消息：
NetworkInfo in android.net has been deprecated
WifiConfiguration in android.net has been deprecated
我很困惑，因为我在C:\Users\{YOUR_ACCOUNT}\AppData\Local\Android\Sdk\sources\android-22\com\android\connectivitymanagertest中看到了一个使用该方法访问wifi的SDK22示例，但为什么它似乎被弃用了？
用什么方法来替换过时的方法呢？
public boolean isWifiConnected() {
boolean isWifiConnected = false;
try {
NetworkInfo networkInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if (networkInfo != null) {
isWifiConnected = networkInfo.getState() == CONNECTED;
}
Log.i(TAG, "wifi adapter is connected? " + isWifiConnected);
} catch (Exception ex) {
ex.printStackTrace();
}
return isWifiConnected;
}
public void removeNetwork() {
List<WifiConfiguration> wifiCfgList = wifiManager.getConfiguredNetworks();
if (wifiCfgList.size() > 0) {
for (WifiConfiguration item : wifiCfgList) {
if (item != null) {
wifiManager.removeNetwork(item.networkId);
wifiManager.saveConfiguration();
}
}
}
}谢谢你的指点。
回答 1
Stack Overflow用户
回答已采纳
发布于 2021-07-09 21:33:49
不推荐使用的类使用ConnectivityManager系统服务和NetworkCallbacks：https://developer.android.com/training/monitoring-device-state/connectivity-status-type进行了重新调整
尽管官方代码示例展示了如何从ConnectivityManager获取NetworkInfo，但仍有一个突出显示的注释：
下面是一个示例代码，说明如何获取当前网络状态并随时间推移接收更新。这是一个部分精简的解决方案，我将在生产中使用。如果您使用RxJava或RxKotlin连接它，您可以创建一个保存网络状态的可观察对象，并在调用被覆盖的NetworkCallback get方法时更新该对象。
关于Java的注意事项:公共类级变量是为了简洁而公开的。相反，我会为这些变量创建几个getter来访问这些变量背后的值。
请随时提问。
Java
class NetworkReachabilityService {
public NetworkType networkType;
public NetworkState networkState = NetworkState.Unavailable;
private ConnectivityManager connectivityManager;
private ConnectivityManager.NetworkCallback networkCallback = new ConnectivityManager.NetworkCallback() {
@Override
public void onAvailable(@NonNull Network network) {
super.onAvailable(network);
updateAvailability(connectivityManager.getNetworkCapabilities(network));
}
@Override
public void onLosing(@NonNull Network network, int maxMsToLive) {
super.onLosing(network, maxMsToLive);
networkState = NetworkState.Losing;
}
@Override
public void onLost(@NonNull Network network) {
super.onLost(network);
networkState = NetworkState.Lost;
}
@Override
public void onUnavailable() {
super.onUnavailable();
networkState = NetworkState.Unavailable;
}
@Override
public void onCapabilitiesChanged(@NonNull Network network, @NonNull NetworkCapabilities networkCapabilities) {
super.onCapabilitiesChanged(network, networkCapabilities);
updateAvailability(networkCapabilities);
}
};
public NetworkReachabilityService(Context context) {
connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
}
private void updateAvailability(NetworkCapabilities networkCapabilities) {
if (networkCapabilities == null) {
networkState = NetworkState.Unavailable;
return;
}
if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
networkType = NetworkType.CELL;
} else if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {
networkType = NetworkType.WiFi;
}
networkState = NetworkState.Available;
}
public void resumeListeningNetworkChanges() {
pauseListeningNetworkChanges();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
connectivityManager.registerDefaultNetworkCallback(networkCallback);
} else {
connectivityManager.registerNetworkCallback(
new NetworkRequest.Builder().build(),
networkCallback
);
}
}
public void pauseListeningNetworkChanges() {
try {
connectivityManager.unregisterNetworkCallback(networkCallback);
} catch (IllegalArgumentException exception) {
// Usually happens only once if: "NetworkCallback was not registered"
}
}
private enum NetworkState {
Available, Unavailable, Connecting, Losing, Lost
}
private enum NetworkType {
WiFi, CELL, OTHER
}
}Kotlin
sealed class NetworkState {
data class Available(val type: NetworkType) : NetworkState()
object Unavailable : NetworkState()
object Connecting : NetworkState()
object Losing : NetworkState()
object Lost : NetworkState()
}
sealed class NetworkType {
object WiFi : NetworkType()
object CELL : NetworkType()
object OTHER : NetworkType()
}
class NetworkReachabilityService private constructor(context: Context) {
private val connectivityManager: ConnectivityManager =
context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
private val networkCallback = object : ConnectivityManager.NetworkCallback() {
// There are more functions to override!
override fun onLost(network: Network) {
super.onLost(network)
networkState = NetworkState.Lost
}
override fun onUnavailable() {
super.onUnavailable()
networkState = NetworkState.Unavailable
}
override fun onLosing(network: Network, maxMsToLive: Int) {
super.onLosing(network, maxMsToLive)
networkState = NetworkState.Losing
}
override fun onAvailable(network: Network) {
super.onAvailable(network)
updateAvailability(connectivityManager.getNetworkCapabilities(network))
}
override fun onCapabilitiesChanged(
network: Network,
networkCapabilities: NetworkCapabilities
) {
super.onCapabilitiesChanged(network, networkCapabilities)
updateAvailability(networkCapabilities)
}
}
var networkState: NetworkState = NetworkState.Unavailable
private set
private fun updateAvailability(networkCapabilities: NetworkCapabilities?) {
if (networkCapabilities == null) {
networkState = NetworkState.Unavailable
return
}
var networkType: NetworkType = NetworkType.OTHER
if (networkCapabilities.hasTransport(TRANSPORT_CELLULAR)) {
networkType = NetworkType.CELL
}
if (networkCapabilities.hasTransport(TRANSPORT_WIFI)) {
networkType = NetworkType.WiFi
}
networkState = NetworkState.Available(networkType)
}
fun pauseListeningNetworkChanges() {
try {
connectivityManager.unregisterNetworkCallback(networkCallback)
} catch (e: IllegalArgumentException) {
// Usually happens only once if: "NetworkCallback was not registered"
}
}
fun resumeListeningNetworkChanges() {
pauseListeningNetworkChanges()
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
connectivityManager.registerDefaultNetworkCallback(networkCallback)
} else {
connectivityManager.registerNetworkCallback(
NetworkRequest.Builder().build(),
networkCallback
)
}
}
}要开始接收网络状态更新，请分别调用resumeListeningNetworkChanges和停止pauseListeningNetworkChanges。
更新:如何在废弃的和新的API之间切换
请注意，即使您使用此解决方案，您仍然会收到一条消息，表明您使用的某些代码已弃用！只要您提供了一个可以在新API和旧的、过时的API之间切换的实现，它就完全没有问题，并且不会被认为是错误。
这是一个近似的解决方案。因为新类是在API level 29中添加的，所以我们必须使用Build.VERSION_CODES.Q，因为它是一个值为29的整数。
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
// Use new API here
} else {
// Use old API here
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/68317355
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