new dev bug: fixed crashing when not possible to show the new popup windows

app/src/main/java/io/github/sspanak/tt9/ime/CommandHandler.java

@@ -159,10 +159,10 @@ abstract public class CommandHandler extends TextEditingHandler {
 	}
 
 
-	protected void changeLang() {
+	protected boolean changeLang() {
 		suggestionOps.cancelDelayedAccept();
 		stopVoiceInput();
-		new ChangeLanguageDialog(getFinalContext(), this::setLang).show();
+		return new ChangeLanguageDialog(getFinalContext(), this::setLang).show();
 	}
 
 

app/src/main/java/io/github/sspanak/tt9/ime/HotkeyHandler.java

@@ -298,10 +298,8 @@ public abstract class HotkeyHandler extends CommandHandler {
 			return true;
 		}
 
-		if (settings.getQuickSwitchLanguage()) {
+		if (settings.getQuickSwitchLanguage() || !changeLang()) {
 			nextLang();
-		} else {
-			changeLang();
 		}
 
 		return true;

app/src/main/java/io/github/sspanak/tt9/preferences/screens/languages/AddWordsWithoutConfirmationSwitch.java

@@ -0,0 +1,39 @@
+package io.github.sspanak.tt9.preferences.screens.languages;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.preference.SwitchPreferenceCompat;
+
+import io.github.sspanak.tt9.R;
+import io.github.sspanak.tt9.preferences.settings.SettingsStore;
+
+public class AddWordsWithoutConfirmationSwitch extends SwitchPreferenceCompat {
+	public AddWordsWithoutConfirmationSwitch(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+		super(context, attrs, defStyleAttr, defStyleRes);
+		init(context);
+	}
+
+	public AddWordsWithoutConfirmationSwitch(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+		super(context, attrs, defStyleAttr);
+		init(context);
+	}
+
+	public AddWordsWithoutConfirmationSwitch(@NonNull Context context, @Nullable AttributeSet attrs) {
+		super(context, attrs);
+		init(context);
+	}
+
+	public AddWordsWithoutConfirmationSwitch(@NonNull Context context) {
+		super(context);
+		init(context);
+	}
+
+	private void init(Context context) {
+		setKey("add_word_no_confirmation");
+		setTitle(R.string.add_word_no_confirmation);
+		setVisible(!new SettingsStore(context).isMainLayoutStealth());
+	}
+}

app/src/main/java/io/github/sspanak/tt9/preferences/screens/languages/QuickSwitchLanguagePreference.java

@@ -0,0 +1,40 @@
+package io.github.sspanak.tt9.preferences.screens.languages;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.preference.SwitchPreferenceCompat;
+
+import io.github.sspanak.tt9.R;
+import io.github.sspanak.tt9.preferences.settings.SettingsStore;
+
+public class QuickSwitchLanguagePreference extends SwitchPreferenceCompat {
+	public QuickSwitchLanguagePreference(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+		super(context, attrs, defStyleAttr, defStyleRes);
+		init(context);
+	}
+
+	public QuickSwitchLanguagePreference(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+		super(context, attrs, defStyleAttr);
+		init(context);
+	}
+
+	public QuickSwitchLanguagePreference(@NonNull Context context, @Nullable AttributeSet attrs) {
+		super(context, attrs);
+		init(context);
+	}
+
+	public QuickSwitchLanguagePreference(@NonNull Context context) {
+		super(context);
+		init(context);
+	}
+
+	private void init(Context context) {
+		setDefaultValue(true);
+		setKey("pref_quick_switch_language");
+		setTitle(R.string.pref_quick_switch_language_summary);
+		setVisible(!new SettingsStore(context).isMainLayoutStealth());
+	}
+}

app/src/main/java/io/github/sspanak/tt9/ui/PopupBuilder.java

@@ -132,6 +132,11 @@ public class PopupBuilder {
 			return null;
 		}
 
+		if (main.getView().getWindowToken() == null) {
+			Logger.d(LOG_TAG, "Not creating popup dialog, because the Main view has no token yet. Try again when it is shown to the user.");
+			return null;
+		}
+
 		Dialog dialog = DeviceInfo.AT_LEAST_ANDROID_12 ? builder12.create() : builderLegacy.create();
 
 		Window window = dialog.getWindow();

app/src/main/java/io/github/sspanak/tt9/ui/dialogs/AddWordDialog.java

@@ -1,7 +1,5 @@
 package io.github.sspanak.tt9.ui.dialogs;
 
-import android.app.Dialog;
-
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
@@ -11,20 +9,15 @@ import io.github.sspanak.tt9.ime.TraditionalT9;
 import io.github.sspanak.tt9.languages.Language;
 import io.github.sspanak.tt9.preferences.settings.SettingsStore;
 import io.github.sspanak.tt9.ui.UI;
-import io.github.sspanak.tt9.ui.main.MainView;
 
 public class AddWordDialog extends PopupDialog {
-	@Nullable private final MainView mainView;
 	@NonNull private final Language language;
 	@NonNull private final SettingsStore settings;
 	@Nullable private final String word;
 
-	private Dialog popup;
-
 
 	public AddWordDialog(@NonNull TraditionalT9 tt9, @NonNull Language language, @Nullable String word) {
 		super(tt9, R.style.TTheme_AddWord);
-		mainView = tt9.getMainView();
 
 		title = tt9.getResources().getString(R.string.add_word_title);
 		OKLabel = tt9.getResources().getString(R.string.add_word_add);
@@ -57,6 +50,8 @@ public class AddWordDialog extends PopupDialog {
 			return;
 		}
 
-		render(this::onOK, null, null);
+		if (!render(this::onOK, null, null)) {
+			onOK();
+		}
 	}
 }

app/src/main/java/io/github/sspanak/tt9/ui/dialogs/ChangeLanguageDialog.java

@@ -1,6 +1,5 @@
 package io.github.sspanak.tt9.ui.dialogs;
 
-import android.app.Dialog;
 import android.content.DialogInterface;
 import android.view.KeyEvent;
 import android.view.View;
@@ -18,17 +17,14 @@ import io.github.sspanak.tt9.languages.Language;
 import io.github.sspanak.tt9.languages.LanguageCollection;
 import io.github.sspanak.tt9.preferences.settings.SettingsStore;
 import io.github.sspanak.tt9.ui.LanguageRadioButton;
-import io.github.sspanak.tt9.ui.main.MainView;
 import io.github.sspanak.tt9.util.ConsumerCompat;
 import io.github.sspanak.tt9.util.sys.DeviceInfo;
 
 public class ChangeLanguageDialog extends PopupDialog {
 	private final ArrayList<Language> languages;
-	private final MainView mainView;
 	private final SettingsStore settings;
 
 	private final ConsumerCompat<Integer> onLanguageChanged;
-	private Dialog popup;
 	private final ArrayList<LanguageRadioButton> radioButtonsCache = new ArrayList<>();
 
 
@@ -38,7 +34,6 @@ public class ChangeLanguageDialog extends PopupDialog {
 		title = tt9.getResources().getString(R.string.language_popup_title);
 		OKLabel = null;
 
-		mainView = tt9.getMainView();
 		settings = tt9.getSettings();
 		languages = LanguageCollection.getAll(settings.getEnabledLanguageIds(), true);
 		onLanguageChanged = changeHandler;
@@ -139,7 +134,7 @@ public class ChangeLanguageDialog extends PopupDialog {
 	}
 
 
-	public void show() {
+	public boolean show() {
-		render(null, this::close, generateRadioButtons());
+		return render(null, this::close, generateRadioButtons());
 	}
 }

app/src/main/java/io/github/sspanak/tt9/ui/dialogs/PopupDialog.java

@@ -50,7 +50,7 @@ abstract public class PopupDialog implements DialogInterface.OnKeyListener {
 		return false;
 	}
 
-	protected Dialog render(Runnable onOK, Runnable onCancel, View customView) {
+	protected boolean render(Runnable onOK, Runnable onCancel, View customView) {
 		PopupBuilder popupBuilder = new PopupBuilder(context);
 		if (onOK != null) {
 			popupBuilder.setPositiveButton(OKLabel, onOK);
@@ -59,12 +59,14 @@ abstract public class PopupDialog implements DialogInterface.OnKeyListener {
 			popupBuilder.setView(customView);
 		}
 
-		return popup = popupBuilder
+		popup = popupBuilder
 			.setCancelable(true)
 			.setTitle(title)
 			.setMessage(message)
 			.setNegativeButton(true, onCancel)
 			.setOnKeyListener(this)
 			.showFromIme(mainView);
+
+		return popup != null;
 	}
 }

app/src/main/res/xml/prefs_screen_languages.xml

@@ -29,19 +29,13 @@
 		app:key="dictionary_truncate"
 		app:title="@string/dictionary_truncate_title" />
 
-	<SwitchPreferenceCompat
+	<io.github.sspanak.tt9.preferences.screens.languages.QuickSwitchLanguagePreference />
-		app:defaultValue="true"
-		app:key="pref_quick_switch_language"
-		app:title="@string/pref_quick_switch_language"
-		app:summary="@string/pref_quick_switch_language_summary" />
 
 	<PreferenceCategory
 		app:title="@string/pref_category_custom_words"
 		app:singleLineTitle="true">
 
-		<SwitchPreferenceCompat
+		<io.github.sspanak.tt9.preferences.screens.languages.AddWordsWithoutConfirmationSwitch />
-			app:key="add_word_no_confirmation"
-			app:title="@string/add_word_no_confirmation" />
 
 		<Preference
 			app:key="dictionary_import_custom"