dynamically get known hosts in dialog

src/main/java/eu/siacs/conversations/ui/BlocklistActivity.java

@@ -4,25 +4,18 @@ import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentTransaction;
 import android.text.Editable;
-import android.view.Menu;
-import android.view.MenuItem;
-import android.view.View;
-import android.widget.AdapterView;
 import android.widget.Toast;
 
-import java.util.ArrayList;
-import java.util.Collection;
 import java.util.Collections;
-import java.util.List;
 
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Contact;
+import eu.siacs.conversations.ui.interfaces.OnBackendConnected;
 import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
 import rocks.xmpp.addr.Jid;
 
 public class BlocklistActivity extends AbstractSearchableListItemActivity implements OnUpdateBlocklist {
-	private Collection<String> mKnownHosts = new ArrayList<>();
 
 	private Account account = null;
 
@@ -45,7 +38,10 @@ public class BlocklistActivity extends AbstractSearchableListItemActivity implem
 			}
 		}
 		filterContacts();
-		this.mKnownHosts = xmppConnectionService.getKnownHosts();
+		Fragment fragment = getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG_DIALOG);
+		if (fragment != null && fragment instanceof OnBackendConnected) {
+			((OnBackendConnected) fragment).onBackendConnected();
+		}
 	}
 
 	@Override
@@ -71,9 +67,12 @@ public class BlocklistActivity extends AbstractSearchableListItemActivity implem
 		}
 		ft.addToBackStack(null);
 		EnterJidDialog dialog = EnterJidDialog.newInstance(
-				mKnownHosts, null,
+				null,
-				getString(R.string.block_jabber_id), getString(R.string.block),
+				getString(R.string.block_jabber_id),
-				null, account.getJid().asBareJid().toString(), true
+				getString(R.string.block),
+				null,
+				account.getJid().asBareJid().toString(),
+				true
 		);
 
 		dialog.setOnEnterJidDialogPositiveListener((accountJid, contactJid) -> {

src/main/java/eu/siacs/conversations/ui/ChooseContactActivity.java

@@ -19,7 +19,6 @@ import android.widget.AbsListView.MultiChoiceModeListener;
 import android.widget.ListView;
 
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
@@ -32,6 +31,7 @@ import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.Conversation;
 import eu.siacs.conversations.entities.ListItem;
 import eu.siacs.conversations.entities.MucOptions;
+import eu.siacs.conversations.ui.interfaces.OnBackendConnected;
 import eu.siacs.conversations.ui.util.ActivityResult;
 import eu.siacs.conversations.ui.util.PendingItem;
 import eu.siacs.conversations.utils.XmppUri;
@@ -40,7 +40,6 @@ import rocks.xmpp.addr.Jid;
 public class ChooseContactActivity extends AbstractSearchableListItemActivity {
 	public static final String EXTRA_TITLE_RES_ID = "extra_title_res_id";
 	private List<String> mActivatedAccounts = new ArrayList<>();
-	private Collection<String> mKnownHosts;
 	private Set<Contact> selected;
 	private Set<String> filterContacts;
 
@@ -240,7 +239,6 @@ public class ChooseContactActivity extends AbstractSearchableListItemActivity {
 		ft.addToBackStack(null);
 		Jid jid = uri == null ? null : uri.getJid();
 		EnterJidDialog dialog = EnterJidDialog.newInstance(
-				mKnownHosts,
 				mActivatedAccounts,
 				getString(R.string.enter_contact),
 				getString(R.string.select),
@@ -301,11 +299,14 @@ public class ChooseContactActivity extends AbstractSearchableListItemActivity {
 				}
 			}
 		}
-		this.mKnownHosts = xmppConnectionService.getKnownHosts();
 		ActivityResult activityResult = this.postponedActivityResult.pop();
 		if (activityResult != null) {
 			handleActivityResult(activityResult);
 		}
+		Fragment fragment = getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG_DIALOG);
+		if (fragment != null && fragment instanceof OnBackendConnected) {
+			((OnBackendConnected) fragment).onBackendConnected();
+		}
 	}
 
 	@Override

src/main/java/eu/siacs/conversations/ui/EnterJidDialog.java

@@ -1,11 +1,13 @@
 package eu.siacs.conversations.ui;
 
+import android.app.Activity;
 import android.databinding.DataBindingUtil;
 import android.support.annotation.NonNull;
 import android.support.v4.app.DialogFragment;
 import android.os.Bundle;
 import android.support.v7.app.AlertDialog;
 import android.app.Dialog;
+import android.util.Log;
 import android.view.View;
 import android.widget.ArrayAdapter;
 import android.widget.AutoCompleteTextView;
@@ -13,6 +15,7 @@ import android.widget.Spinner;
 
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
 
@@ -20,10 +23,11 @@ import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.databinding.EnterJidDialogBinding;
 import eu.siacs.conversations.ui.adapter.KnownHostsAdapter;
+import eu.siacs.conversations.ui.interfaces.OnBackendConnected;
 import eu.siacs.conversations.ui.util.DelayedHintHelper;
 import rocks.xmpp.addr.Jid;
 
-public class EnterJidDialog extends DialogFragment{
+public class EnterJidDialog extends DialogFragment implements OnBackendConnected {
 
 	private OnEnterJidDialogPositiveListener mListener = null;
 
@@ -33,21 +37,20 @@ public class EnterJidDialog extends DialogFragment{
 	private static final String ACCOUNT_KEY = "account";
 	private static final String ALLOW_EDIT_JID_KEY = "allow_edit_jid";
 	private static final String ACCOUNTS_LIST_KEY = "activated_accounts_list";
-	private static final String CONFERENCE_HOSTS_KEY = "known_conference_hosts";
 
-	public static EnterJidDialog newInstance(
+	private KnownHostsAdapter knownHostsAdapter;
-			Collection<String> knownHosts, final List<String> activatedAccounts,
+
-			final String title, final String positiveButton,
+	public static EnterJidDialog newInstance(final List<String> activatedAccounts,
-			final String prefilledJid, final String account, boolean allowEditJid) {
+	                                         final String title, final String positiveButton,
+	                                         final String prefilledJid, final String account, boolean allowEditJid) {
 		EnterJidDialog dialog = new EnterJidDialog();
-		Bundle bundle  = new Bundle();
+		Bundle bundle = new Bundle();
 		bundle.putString(TITLE_KEY, title);
 		bundle.putString(POSITIVE_BUTTON_KEY, positiveButton);
 		bundle.putString(PREFILLED_JID_KEY, prefilledJid);
 		bundle.putString(ACCOUNT_KEY, account);
 		bundle.putBoolean(ALLOW_EDIT_JID_KEY, allowEditJid);
 		bundle.putStringArrayList(ACCOUNTS_LIST_KEY, (ArrayList<String>) activatedAccounts);
-		bundle.putSerializable(CONFERENCE_HOSTS_KEY, (HashSet) knownHosts);
 		dialog.setArguments(bundle);
 		return dialog;
 	}
@@ -58,13 +61,23 @@ public class EnterJidDialog extends DialogFragment{
 		setRetainInstance(true);
 	}
 
+	@Override
+	public void onStart() {
+		super.onStart();
+		final Activity activity = getActivity();
+		if (activity instanceof XmppActivity && ((XmppActivity) activity).xmppConnectionService != null) {
+			refreshKnownHosts();
+		}
+	}
+
 	@NonNull
 	@Override
 	public Dialog onCreateDialog(Bundle savedInstanceState) {
 		final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
 		builder.setTitle(getArguments().getString(TITLE_KEY));
 		EnterJidDialogBinding binding = DataBindingUtil.inflate(getActivity().getLayoutInflater(), R.layout.enter_jid_dialog, null, false);
-		binding.jid.setAdapter(new KnownHostsAdapter(getActivity(), R.layout.simple_list_item, (Collection<String>) getArguments().getSerializable(CONFERENCE_HOSTS_KEY)));
+		this.knownHostsAdapter = new KnownHostsAdapter(getActivity(), R.layout.simple_list_item);
+		binding.jid.setAdapter(this.knownHostsAdapter);
 		String prefilledJid = getArguments().getString(PREFILLED_JID_KEY);
 		if (prefilledJid != null) {
 			binding.jid.append(prefilledJid);
@@ -84,7 +97,7 @@ public class EnterJidDialog extends DialogFragment{
 		} else {
 			ArrayAdapter<String> adapter = new ArrayAdapter<>(getActivity(),
 					R.layout.simple_list_item,
-					new String[] { account });
+					new String[]{account});
 			binding.account.setEnabled(false);
 			adapter.setDropDownViewResource(R.layout.simple_list_item);
 			binding.account.setAdapter(adapter);
@@ -117,12 +130,12 @@ public class EnterJidDialog extends DialogFragment{
 				return;
 			}
 
-			if(mListener != null) {
+			if (mListener != null) {
 				try {
-					if(mListener.onEnterJidDialogPositive(accountJid, contactJid)) {
+					if (mListener.onEnterJidDialogPositive(accountJid, contactJid)) {
 						dialog.dismiss();
 					}
-				} catch(JidError error) {
+				} catch (JidError error) {
 					binding.jid.setError(error.toString());
 				}
 			}
@@ -136,6 +149,19 @@ public class EnterJidDialog extends DialogFragment{
 		this.mListener = listener;
 	}
 
+	@Override
+	public void onBackendConnected() {
+		refreshKnownHosts();
+	}
+
+	private void refreshKnownHosts() {
+		Activity activity = getActivity();
+		if (activity instanceof XmppActivity) {
+			Collection<String> hosts = ((XmppActivity) activity).xmppConnectionService.getKnownHosts();
+			this.knownHostsAdapter.refresh(hosts);
+		}
+	}
+
 	public interface OnEnterJidDialogPositiveListener {
 		boolean onEnterJidDialogPositive(Jid account, Jid contact) throws EnterJidDialog.JidError;
 	}

src/main/java/eu/siacs/conversations/ui/JoinConferenceDialog.java

@@ -1,5 +1,6 @@
 package eu.siacs.conversations.ui;
 
+import android.app.Activity;
 import android.app.Dialog;
 import android.databinding.DataBindingUtil;
 import android.support.annotation.NonNull;
@@ -22,79 +23,97 @@ import java.util.List;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.databinding.JoinConferenceDialogBinding;
 import eu.siacs.conversations.ui.adapter.KnownHostsAdapter;
+import eu.siacs.conversations.ui.interfaces.OnBackendConnected;
 import eu.siacs.conversations.ui.util.DelayedHintHelper;
 
-public class JoinConferenceDialog extends DialogFragment {
+public class JoinConferenceDialog extends DialogFragment implements OnBackendConnected {
 
-    private static final String PREFILLED_JID_KEY = "prefilled_jid";
+	private static final String PREFILLED_JID_KEY = "prefilled_jid";
-    private static final String ACCOUNTS_LIST_KEY = "activated_accounts_list";
+	private static final String ACCOUNTS_LIST_KEY = "activated_accounts_list";
-    private static final String CONFERENCE_HOSTS_KEY = "known_conference_hosts";
+	private JoinConferenceDialogListener mListener;
-    private JoinConferenceDialogListener mListener;
+	private KnownHostsAdapter knownHostsAdapter;
 
-    public static JoinConferenceDialog newInstance(String prefilledJid, List<String> accounts, Collection<String> conferenceHosts) {
+	public static JoinConferenceDialog newInstance(String prefilledJid, List<String> accounts) {
-        JoinConferenceDialog dialog = new JoinConferenceDialog();
+		JoinConferenceDialog dialog = new JoinConferenceDialog();
-        Bundle bundle =  new Bundle();
+		Bundle bundle = new Bundle();
-        bundle.putString(PREFILLED_JID_KEY, prefilledJid);
+		bundle.putString(PREFILLED_JID_KEY, prefilledJid);
-        bundle.putStringArrayList(ACCOUNTS_LIST_KEY, (ArrayList<String>) accounts);
+		bundle.putStringArrayList(ACCOUNTS_LIST_KEY, (ArrayList<String>) accounts);
-        bundle.putSerializable(CONFERENCE_HOSTS_KEY, (HashSet) conferenceHosts);
+		dialog.setArguments(bundle);
-        dialog.setArguments(bundle);
+		return dialog;
-        return dialog;
+	}
-    }
 
-    @Override
+	@Override
-    public void onActivityCreated(Bundle savedInstanceState) {
+	public void onActivityCreated(Bundle savedInstanceState) {
-        super.onActivityCreated(savedInstanceState);
+		super.onActivityCreated(savedInstanceState);
-        setRetainInstance(true);
+		setRetainInstance(true);
-    }
+	}
 
-    @NonNull
+	@NonNull
-    @Override
+	@Override
-    public Dialog onCreateDialog(Bundle savedInstanceState) {
+	public Dialog onCreateDialog(Bundle savedInstanceState) {
-        final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+		final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
-        builder.setTitle(R.string.dialog_title_join_conference);
+		builder.setTitle(R.string.dialog_title_join_conference);
-        JoinConferenceDialogBinding binding = DataBindingUtil.inflate(getActivity().getLayoutInflater(), R.layout.join_conference_dialog, null, false);
+		JoinConferenceDialogBinding binding = DataBindingUtil.inflate(getActivity().getLayoutInflater(), R.layout.join_conference_dialog, null, false);
-        DelayedHintHelper.setHint(R.string.conference_address_example, binding.jid);
+		DelayedHintHelper.setHint(R.string.conference_address_example, binding.jid);
-        binding.jid.setAdapter(new KnownHostsAdapter(getActivity(), R.layout.simple_list_item, (Collection<String>) getArguments().getSerializable(CONFERENCE_HOSTS_KEY)));
+		this.knownHostsAdapter = new KnownHostsAdapter(getActivity(), R.layout.simple_list_item);
-        String prefilledJid = getArguments().getString(PREFILLED_JID_KEY);
+		binding.jid.setAdapter(knownHostsAdapter);
-        if (prefilledJid != null) {
+		String prefilledJid = getArguments().getString(PREFILLED_JID_KEY);
-            binding.jid.append(prefilledJid);
+		if (prefilledJid != null) {
-        }
+			binding.jid.append(prefilledJid);
-        StartConversationActivity.populateAccountSpinner(getActivity(), getArguments().getStringArrayList(ACCOUNTS_LIST_KEY), binding.account);
+		}
-        builder.setView(binding.getRoot());
+		StartConversationActivity.populateAccountSpinner(getActivity(), getArguments().getStringArrayList(ACCOUNTS_LIST_KEY), binding.account);
-        builder.setPositiveButton(R.string.join, null);
+		builder.setView(binding.getRoot());
-        builder.setNegativeButton(R.string.cancel, null);
+		builder.setPositiveButton(R.string.join, null);
-        AlertDialog dialog = builder.create();
+		builder.setNegativeButton(R.string.cancel, null);
-        dialog.show();
+		AlertDialog dialog = builder.create();
-        dialog.getButton(DialogInterface.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener() {
+		dialog.show();
-            @Override
+		dialog.getButton(DialogInterface.BUTTON_POSITIVE).setOnClickListener(view -> mListener.onJoinDialogPositiveClick(dialog, binding.account, binding.jid, binding.bookmark.isChecked()));
-            public void onClick(View view) {
+		return dialog;
-                mListener.onJoinDialogPositiveClick(dialog, binding.account, binding.jid, binding.bookmark.isChecked());
+	}
-            }
-        });
-        return dialog;
-    }
 
-    public interface JoinConferenceDialogListener {
+	@Override
-        void onJoinDialogPositiveClick(Dialog dialog, Spinner spinner, AutoCompleteTextView jid, boolean isBookmarkChecked);
+	public void onBackendConnected() {
-    }
+		refreshKnownHosts();
+	}
 
-    @Override
+	private void refreshKnownHosts() {
-    public void onAttach(Context context) {
+		Activity activity = getActivity();
-        super.onAttach(context);
+		if (activity instanceof XmppActivity) {
-        try {
+			Collection<String> hosts = ((XmppActivity) activity).xmppConnectionService.getKnownConferenceHosts();
-            mListener = (JoinConferenceDialogListener) context;
+			this.knownHostsAdapter.refresh(hosts);
-        } catch (ClassCastException e) {
+		}
-            throw new ClassCastException(context.toString()
+	}
-                    + " must implement JoinConferenceDialogListener");
-        }
-    }
 
-    @Override
+	@Override
-    public void onDestroyView() {
+	public void onAttach(Context context) {
-        Dialog dialog = getDialog();
+		super.onAttach(context);
-        if (dialog != null && getRetainInstance()) {
+		try {
-            dialog.setDismissMessage(null);
+			mListener = (JoinConferenceDialogListener) context;
-        }
+		} catch (ClassCastException e) {
-        super.onDestroyView();
+			throw new ClassCastException(context.toString()
-    }
+					+ " must implement JoinConferenceDialogListener");
+		}
+	}
+
+	@Override
+	public void onDestroyView() {
+		Dialog dialog = getDialog();
+		if (dialog != null && getRetainInstance()) {
+			dialog.setDismissMessage(null);
+		}
+		super.onDestroyView();
+	}
+
+	@Override
+	public void onStart() {
+		super.onStart();
+		final Activity activity = getActivity();
+		if (activity instanceof XmppActivity && ((XmppActivity) activity).xmppConnectionService != null) {
+			refreshKnownHosts();
+		}
+	}
+
+	public interface JoinConferenceDialogListener {
+		void onJoinDialogPositiveClick(Dialog dialog, Spinner spinner, AutoCompleteTextView jid, boolean isBookmarkChecked);
+	}
 }

src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java

@@ -35,6 +35,7 @@ import android.text.SpannableString;
 import android.text.Spanned;
 import android.text.TextWatcher;
 import android.text.style.TypefaceSpan;
+import android.util.Log;
 import android.util.Pair;
 import android.view.ContextMenu;
 import android.view.ContextMenu.ContextMenuInfo;
@@ -76,6 +77,7 @@ import eu.siacs.conversations.entities.Presence;
 import eu.siacs.conversations.services.XmppConnectionService.OnRosterUpdate;
 import eu.siacs.conversations.ui.adapter.KnownHostsAdapter;
 import eu.siacs.conversations.ui.adapter.ListItemAdapter;
+import eu.siacs.conversations.ui.interfaces.OnBackendConnected;
 import eu.siacs.conversations.ui.service.EmojiService;
 import eu.siacs.conversations.ui.util.DelayedHintHelper;
 import eu.siacs.conversations.utils.XmppUri;
@@ -95,8 +97,6 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 	private List<ListItem> conferences = new ArrayList<>();
 	private ListItemAdapter mConferenceAdapter;
 	private List<String> mActivatedAccounts = new ArrayList<>();
-	private Collection<String> mKnownHosts;
-	private Collection<String> mKnownConferenceHosts;
 	private Invite mPendingInvite = null;
 	private EditText mSearchEditText;
 	private AtomicBoolean mRequestedContactsPermission = new AtomicBoolean(false);
@@ -441,15 +441,18 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 	@SuppressLint("InflateParams")
 	protected void showCreateContactDialog(final String prefilledJid, final Invite invite) {
 		FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
-		Fragment prev = getSupportFragmentManager().findFragmentByTag("dialog");
+		Fragment prev = getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG_DIALOG);
 		if (prev != null) {
 			ft.remove(prev);
 		}
 		ft.addToBackStack(null);
 		EnterJidDialog dialog = EnterJidDialog.newInstance(
-				mKnownHosts, mActivatedAccounts,
+				mActivatedAccounts,
-				getString(R.string.dialog_title_create_contact), getString(R.string.create),
+				getString(R.string.dialog_title_create_contact),
-				prefilledJid, null, invite == null || !invite.hasFingerprints()
+				getString(R.string.create),
+				prefilledJid,
+				null,
+				invite == null || !invite.hasFingerprints()
 		);
 
 		dialog.setOnEnterJidDialogPositiveListener((accountJid, contactJid) -> {
@@ -480,30 +483,30 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 				return true;
 			}
 		});
-		dialog.show(ft, "dialog");
+		dialog.show(ft, FRAGMENT_TAG_DIALOG);
 	}
 
 	@SuppressLint("InflateParams")
 	protected void showJoinConferenceDialog(final String prefilledJid) {
 		FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
-		Fragment prev = getSupportFragmentManager().findFragmentByTag("dialog");
+		Fragment prev = getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG_DIALOG);
 		if (prev != null) {
 			ft.remove(prev);
 		}
 		ft.addToBackStack(null);
-		JoinConferenceDialog joinConferenceFragment = JoinConferenceDialog.newInstance(prefilledJid, mActivatedAccounts, mKnownConferenceHosts);
+		JoinConferenceDialog joinConferenceFragment = JoinConferenceDialog.newInstance(prefilledJid, mActivatedAccounts);
-		joinConferenceFragment.show(ft, "dialog");
+		joinConferenceFragment.show(ft, FRAGMENT_TAG_DIALOG);
 	}
 
 	private void showCreateConferenceDialog() {
 		FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
-		Fragment prev = getSupportFragmentManager().findFragmentByTag("dialog");
+		Fragment prev = getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG_DIALOG);
 		if (prev != null) {
 			ft.remove(prev);
 		}
 		ft.addToBackStack(null);
 		CreateConferenceDialog createConferenceFragment = CreateConferenceDialog.newInstance(mActivatedAccounts);
-		createConferenceFragment.show(ft, "dialog");
+		createConferenceFragment.show(ft, FRAGMENT_TAG_DIALOG);
 	}
 
 	private Account getSelectedAccount(Spinner spinner) {
@@ -707,8 +710,6 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 			ab.setDisplayHomeAsUpEnabled(false);
 			ab.setHomeButtonEnabled(false);
 		}
-		this.mKnownHosts = xmppConnectionService.getKnownHosts();
-		this.mKnownConferenceHosts = xmppConnectionService.getKnownConferenceHosts();
 		if (this.mPendingInvite != null) {
 			mPendingInvite.invite();
 			this.mPendingInvite = null;
@@ -723,6 +724,11 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 			filter(null);
 		}
 		setIntent(null);
+		Fragment fragment = getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG_DIALOG);
+		if (fragment != null && fragment instanceof OnBackendConnected) {
+			Log.d(Config.LOGTAG,"calling on backend connected on dialog");
+			((OnBackendConnected) fragment).onBackendConnected();
+		}
 	}
 
 	protected boolean handleIntent(Intent intent) {

src/main/java/eu/siacs/conversations/ui/XmppActivity.java

@@ -87,6 +87,8 @@ public abstract class XmppActivity extends AppCompatActivity {
 	protected int mColorOrange;
 	protected int mColorGreen;
 
+	protected static final String FRAGMENT_TAG_DIALOG = "dialog";
+
 	private boolean isCameraFeatureAvailable = false;
 
 	protected boolean mUseSubject = true;

src/main/java/eu/siacs/conversations/ui/adapter/KnownHostsAdapter.java

@@ -64,6 +64,16 @@ public class KnownHostsAdapter extends ArrayAdapter<String> {
 		domains = new ArrayList<>(mKnownHosts);
 	}
 
+	public KnownHostsAdapter(Context context, int viewResourceId) {
+		super(context, viewResourceId, new ArrayList<>());
+		domains = new ArrayList<>();
+	}
+
+	public void refresh(Collection<String> knownHosts) {
+		domains = new ArrayList<>(knownHosts);
+		notifyDataSetChanged();
+	}
+
 	@Override
 	@NonNull
 	public Filter getFilter() {