content: package de.androidcrypto.android_hce_beginner_app;
  
  import android.content.ComponentName;
  import android.content.pm.PackageManager;
  import android.nfc.NfcAdapter;
  import android.nfc.cardemulation.CardEmulation;
  import android.os.Bundle;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.ViewGroup;
  import android.webkit.WebView;
  import android.widget.Button;
  import android.widget.TextView;
  
  import androidx.annotation.NonNull;
  import androidx.annotation.Nullable;
  import androidx.fragment.app.Fragment;
  
  /**
   * A simple {@link Fragment} subclass.
   * Use the {@link HomeFragment#newInstance} factory method to
   * create an instance of this fragment.
   */
  public class HomeFragment extends Fragment {
  
      // TODO: Rename parameter arguments, choose names that match
      // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
      private static final String ARG_PARAM1 = "param1";
      private static final String ARG_PARAM2 = "param2";
  
      // TODO: Rename and change types of parameters
      private String mParam1;
      private String mParam2;
  
      public HomeFragment() {
          // Required empty public constructor
      }
  
      /**
       * Use this factory method to create a new instance of
       * this fragment using the provided parameters.
       *
       * @param param1 Parameter 1.
       * @param param2 Parameter 2.
       * @return A new instance of fragment HomeFragment.
       */
      // TODO: Rename and change types and number of parameters
      public static HomeFragment newInstance(String param1, String param2) {
          HomeFragment fragment = new HomeFragment();
          Bundle args = new Bundle();
          args.putString(ARG_PARAM1, param1);
          args.putString(ARG_PARAM2, param2);
          fragment.setArguments(args);
          return fragment;
      }
  
      private Button licenses;
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          if (getArguments() != null) {
              mParam1 = getArguments().getString(ARG_PARAM1);
              mParam2 = getArguments().getString(ARG_PARAM2);
          }
      }
  
      @Override
      public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
          super.onViewCreated(view, savedInstanceState);
          licenses = getView().findViewById(R.id.btnLicenses);
          licenses.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View view) {
                  displayLicensesAlertDialog();
              }
          });
  
      }
  
      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container,
                               Bundle savedInstanceState) {
          // Inflate the layout for this fragment
          return inflater.inflate(R.layout.fragment_home, container, false);
      }
  
      /**
       * options menu show licenses
       */
  
      // run: displayLicensesAlertDialog();
      // display licenses dialog see: https://bignerdranch.com/blog/open-source-licenses-and-android/
      private void displayLicensesAlertDialog() {
          WebView view = (WebView) LayoutInflater.from(getContext()).inflate(R.layout.dialog_licenses, null);
          view.loadUrl("file:///android_asset/open_source_licenses.html");
          android.app.AlertDialog mAlertDialog = new android.app.AlertDialog.Builder(getActivity()).create();
          mAlertDialog = new android.app.AlertDialog.Builder(getContext(), R.style.Theme_Android_HCE_Beginner_App)
                  .setTitle(getString(R.string.action_licenses))
                  .setView(view)
                  .setPositiveButton(android.R.string.ok, null)
                  .show();
      }
  
  }