將目標 sdk 更新為 29 后導入已棄用警告

Question

在build.gradle中將 compile 和targetSdkVersion更新為“29”后，我收到棄用警告：

warning: [deprecation] NetworkInfo in android.net has been deprecated
import android.net.NetworkInfo;
                  ^

因此構建失敗。 但我使用網絡信息與api 版本 16-29兼容。 我應該如何處理針對 api "29" 及以上的已棄用導入？

Answer 1

我找到了解決方案。 您必須以這種方式編寫方法。

@SuppressWarnings("deprecation")
public boolean isConnected() {
        ConnectivityManager cm = (ConnectivityManager) AnkiDroidApp.getInstance().getApplicationContext()
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        if (cm == null) {
            return false;
        }
        /* NetworkInfo is deprecated in API 29 so we have to check separately for higher API Levels */
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
            Network network = cm.getActiveNetwork();
            if (network == null) {
                return false;
            }
            NetworkCapabilities networkCapabilities = cm.getNetworkCapabilities(network);
            if (networkCapabilities == null) {
                return false;
            }
            boolean isInternetSuspended = !networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_SUSPENDED);
            return networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
                    && networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED)
                    && !isInternetSuspended;
        } else {
            android.net.NetworkInfo networkInfo = cm.getActiveNetworkInfo();
            return networkInfo != null && networkInfo.isConnected();
        }
    }

記得抑制警告。

Answer 2

您的問題的答案在此鏈接中！

NetworkCapabilities 在 API 29 中沒有被棄用，但它需要 API 21 所以我只在 API 29 上調用它。

public static boolean isNetworkAvailable(Context context) {
if(context == null)  return false;


ConnectivityManager connectivityManager = (ConnectivityManager) 

context.getSystemService(Context.CONNECTIVITY_SERVICE);

    if (connectivityManager != null) {


    if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            NetworkCapabilities capabilities = 

 connectivityManager.getNetworkCapabilities(connectivityManager.getActiveNetwork());
            if (capabilities != null) {
                if 
                (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
                    return true;
                } else if 
                 (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {
                    return true;
                }  else if 
                 (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET)){
                    return true;
                }
            }
        }

    else {

        try {
            NetworkInfo activeNetworkInfo = 
               connectivityManager.getActiveNetworkInfo();
            if (activeNetworkInfo != null && activeNetworkInfo.isConnected()) {
                Log.i("update_statut", "Network is available : true");
                return true;
            }
        } catch (Exception e) {
            Log.i("update_statut", "" + e.getMessage());
        }
    }
}
    Log.i("update_statut","Network is available : FALSE ");
    return false;
}