big code cleanup and code style fixes of the entire project

src/io/github/sspanak/tt9/Logger.java

@@ -3,7 +3,7 @@ package io.github.sspanak.tt9;
 import android.util.Log;
 
 public class Logger {
-	public static int LEVEL = BuildConfig.DEBUG ? Log.DEBUG : Log.ERROR;
+	public static final int LEVEL = BuildConfig.DEBUG ? Log.DEBUG : Log.ERROR;
 
 	static public void v(String tag, String msg)  {
 		if (LEVEL <= Log.VERBOSE) {

src/io/github/sspanak/tt9/db/migrations/DB7.java

@@ -2,6 +2,7 @@ package io.github.sspanak.tt9.db.migrations;
 
 import android.content.Context;
 
+import androidx.annotation.NonNull;
 import androidx.room.migration.Migration;
 import androidx.sqlite.db.SupportSQLiteDatabase;
 
@@ -74,7 +75,7 @@ public class DB7 {
 		}
 
 		@Override
-		public void migrate(SupportSQLiteDatabase database) {
+		public void migrate(@NonNull SupportSQLiteDatabase database) {
 			migrateSQL(database);
 			migrateSettings();
 		}

src/io/github/sspanak/tt9/ime/KeyPadHandler.java

@@ -114,12 +114,6 @@ abstract class KeyPadHandler extends InputMethodService {
 	}
 
 
-	@Override
-	public void onDestroy() {
-		super.onDestroy();
-	}
-
-
 	/**
 	 * Use this to monitor key events being delivered to the application. We get
 	 * first crack at them, and can either resume them or let them continue to
@@ -283,7 +277,6 @@ abstract class KeyPadHandler extends InputMethodService {
 	// toggle handlers
 	abstract protected boolean shouldTrackUpDown();
 	abstract protected boolean shouldTrackLeftRight();
-	abstract protected boolean shouldTrackNumPress();
 
 	// default hardware key handlers
 	abstract public boolean onBackspace();

src/io/github/sspanak/tt9/ime/TraditionalT9.java

@@ -383,11 +383,6 @@ public class TraditionalT9 extends KeyPadHandler {
 	}
 
 
-	protected boolean shouldTrackNumPress() {
-		return mInputMode.shouldTrackNumPress();
-	}
-
-
 	protected boolean shouldTrackUpDown() {
 		return mEditing != EDITING_STRICT_NUMERIC && !isSuggestionViewHidden() && mInputMode.shouldTrackUpDown();
 	}
@@ -641,7 +636,6 @@ public class TraditionalT9 extends KeyPadHandler {
 
 	private void determineNextTextCase() {
 		mInputMode.determineNextWordTextCase(
-			settings,
 			textField.isThereText(),
 			textField.getTextBeforeCursor()
 		);

src/io/github/sspanak/tt9/ime/helpers/InputType.java

@@ -25,7 +25,7 @@ public class InputType {
 	 * Special or limited input type means the input connection is not rich,
 	 * or it can not process or show things like candidate text, nor retrieve the current text.
 	 *
-	 * https://developer.android.com/reference/android/text/InputType#TYPE_NULL
+	 * <a href="https://developer.android.com/reference/android/text/InputType#TYPE_NULL">...</a>
 	 */
 	public boolean isLimited() {
 		return field != null && field.inputType == android.text.InputType.TYPE_NULL;

src/io/github/sspanak/tt9/ime/modes/InputMode.java

@@ -22,14 +22,14 @@ abstract public class InputMode {
 	public static final int CASE_CAPITALIZE = 1;
 	public static final int CASE_LOWER = 2;
 	public static final int CASE_DICTIONARY = 3; // do not force it, but use the dictionary word as-is
-	protected ArrayList<Integer> allowedTextCases = new ArrayList<>();
+	protected final ArrayList<Integer> allowedTextCases = new ArrayList<>();
 	protected int textCase = CASE_LOWER;
 	protected int textFieldTextCase = CASE_UNDEFINED;
 
 	// data
 	protected int autoAcceptTimeout = -1;
 	protected Language language;
-	protected ArrayList<String> suggestions = new ArrayList<>();
+	protected final ArrayList<String> suggestions = new ArrayList<>();
 	protected int keyCode = 0;
 
 
@@ -87,7 +87,7 @@ abstract public class InputMode {
 	public boolean shouldAddAutoSpace(InputType inputType, TextField textField, boolean isWordAcceptedManually, int incomingKey, boolean hold, boolean repeat) { return false; }
 	public boolean shouldDeletePrecedingSpace(InputType inputType) { return false; }
 	public boolean shouldSelectNextSuggestion() { return false; }
-	public boolean shouldTrackNumPress() { return true; }
+
 	public boolean shouldTrackUpDown() { return false; }
 	public boolean shouldTrackLeftRight() { return false; }
 
@@ -122,7 +122,7 @@ abstract public class InputMode {
 		textCase = allowedTextCases.get(nextIndex);
 	}
 
-	public void determineNextWordTextCase(SettingsStore settings, boolean isThereText, String textBeforeCursor) {}
+	public void determineNextWordTextCase(boolean isThereText, String textBeforeCursor) {}
 
 	// Based on the internal logic of the mode (punctuation or grammar rules), re-adjust the text case for when getSuggestions() is called.
 	protected String adjustSuggestionTextCase(String word, int newTextCase) { return word; }

src/io/github/sspanak/tt9/ime/modes/Mode123.java

@@ -28,7 +28,6 @@ public class Mode123 extends InputMode {
 
 	@Override final public boolean is123() { return true; }
 	@Override public int getSequenceLength() { return 0; }
-	@Override public boolean shouldTrackNumPress() { return false; }
 
 	@NonNull
 	@Override

src/io/github/sspanak/tt9/ime/modes/ModePredictive.java

@@ -257,7 +257,7 @@ public class ModePredictive extends InputMode {
 	}
 
 	@Override
-	public void determineNextWordTextCase(SettingsStore settings, boolean isThereText, String textBeforeCursor) {
+	public void determineNextWordTextCase(boolean isThereText, String textBeforeCursor) {
 		textCase = autoTextCase.determineNextWordTextCase(isThereText, textCase, textFieldTextCase, textBeforeCursor);
 	}
 

src/io/github/sspanak/tt9/ime/modes/helpers/Predictions.java

@@ -73,9 +73,8 @@ public class Predictions {
 		return this;
 	}
 
-	public Predictions setWordsChangedHandler(Handler handler) {
+	public void setWordsChangedHandler(Handler handler) {
 		wordsChangedHandler = handler;
-		return this;
 	}
 
 	public ArrayList<String> getList() {

src/io/github/sspanak/tt9/languages/InvalidLanguageCharactersException.java

@@ -8,8 +8,5 @@ public class InvalidLanguageCharactersException extends Exception {
 		this.language = language;
 	}
 
-	public Language getLanguage() {
-		return language;
-	}
 }
 

src/io/github/sspanak/tt9/languages/definitions/Spanish.java

@@ -19,9 +19,9 @@ public class Spanish extends English {
 		characterMap.set(1, new ArrayList<>(Characters.Sentence));
 		characterMap.get(1).addAll(Arrays.asList("¡", "¿"));
 
-		characterMap.get(2).addAll(Collections.singletonList("á"));
-		characterMap.get(3).addAll(Collections.singletonList("é"));
-		characterMap.get(4).addAll(Collections.singletonList("í"));
+		characterMap.get(2).add("á");
+		characterMap.get(3).add("é");
+		characterMap.get(4).add("í");
 		characterMap.set(6, new ArrayList<>(Arrays.asList("m", "n", "ñ", "o", "ó")));
 		characterMap.get(8).addAll(Arrays.asList("ú", "ü"));
 	}

src/io/github/sspanak/tt9/preferences/SettingsStore.java

@@ -198,11 +198,8 @@ public class SettingsStore {
 		return getFunctionKey(SectionKeymap.ITEM_SHOW_SETTINGS);
 	}
 
-
 	/************* UI settings *************/
 
-	public boolean getNotifyNextLanguageInModeAbc() { return prefs.getBoolean("notify_next_language_in_mode_abc", true); }
-
 	public boolean getDarkTheme() { return prefs.getBoolean("pref_dark_theme", true); }
 
 	public boolean getShowSoftKeys() { return prefs.getBoolean("pref_show_soft_keys", true); }

src/io/github/sspanak/tt9/preferences/items/ItemClickable.java

@@ -28,7 +28,7 @@ abstract class ItemClickable {
 	 *
 	 * My smashed Qin F21 Pro+ occasionally does this, if I press the keys hard.
 	 * There were reports the same happens on Kyocera KYF31, causing absolutely undesirable side effects.
-	 * @see: https://github.com/sspanak/tt9/issues/117
+	 * @see: <a href="https://github.com/sspanak/tt9/issues/117">...</a>
 	 */
 	protected boolean debounceClick(Preference p) {
 		long now = System.currentTimeMillis();

src/io/github/sspanak/tt9/preferences/items/ItemSelectLanguage.java

@@ -46,9 +46,9 @@ public class ItemSelectLanguage {
 	}
 
 
-	public ItemSelectLanguage enableValidation() {
+	public void enableValidation() {
 		if (item == null) {
-			return this;
+			return;
 		}
 
 		item.setOnPreferenceChangeListener((preference, newValue) -> {
@@ -65,7 +65,6 @@ public class ItemSelectLanguage {
 			return false;
 		});
 
-		return this;
 	}
 
 

src/io/github/sspanak/tt9/preferences/items/ItemSelectZeroKeyCharacter.java

@@ -41,10 +41,10 @@ public class ItemSelectZeroKeyCharacter {
 	}
 
 
-	public ItemSelectZeroKeyCharacter activate() {
+	public void activate() {
 		if (item == null) {
 			Logger.w("tt9/ItemSelectZeroKeyChar.activate", "Cannot set a click listener a NULL item. Ignoring.");
-			return this;
+			return;
 		}
 
 		item.setOnPreferenceChangeListener((preference, newChar) -> {
@@ -53,7 +53,6 @@ public class ItemSelectZeroKeyCharacter {
 			return true;
 		});
 
-		return this;
 	}
 
 

src/io/github/sspanak/tt9/preferences/items/SectionKeymap.java

@@ -46,12 +46,11 @@ public class SectionKeymap {
 	}
 
 
-	public SectionKeymap activate() {
+	public void activate() {
 		for (DropDownPreference item : items) {
 			onItemClick(item);
 		}
 
-		return this;
 	}
 
 

src/io/github/sspanak/tt9/ui/AddWordAct.java

@@ -40,14 +40,13 @@ public class AddWordAct extends AppCompatActivity {
 		word = i.getStringExtra("io.github.sspanak.tt9.word");
 		lang = i.getIntExtra("io.github.sspanak.tt9.lang", -1);
 
-		View v = View.inflate(this, R.layout.addwordview, null);
+		main = View.inflate(this, R.layout.addwordview, null);
 
-		EditText et = v.findViewById(R.id.add_word_text);
+		EditText et = main.findViewById(R.id.add_word_text);
 		et.setOnClickListener(this::addWord);
 		et.setText(word);
 		et.setSelection(word.length());
-		setContentView(v);
-		main = v;
+		setContentView(main);
 	}
 
 

src/io/github/sspanak/tt9/ui/DictionaryLoadingBar.java

@@ -170,14 +170,11 @@ public class DictionaryLoadingBar {
 		if (lang == null || errorType.equals(InvalidLanguageException.class.getSimpleName())) {
 			message = resources.getString(R.string.add_word_invalid_language);
 		} else if (errorType.equals(DictionaryImportException.class.getSimpleName()) || errorType.equals(InvalidLanguageCharactersException.class.getSimpleName())) {
-			String languageName = lang.getName();
-			message = resources.getString(R.string.dictionary_load_bad_char, word, line, languageName);
+			message = resources.getString(R.string.dictionary_load_bad_char, word, line, lang.getName());
 		} else if (errorType.equals(IOException.class.getSimpleName()) || errorType.equals(FileNotFoundException.class.getSimpleName())) {
-			String languageName = lang.getName();
-			message = resources.getString(R.string.dictionary_not_found, languageName);
+			message = resources.getString(R.string.dictionary_not_found, lang.getName());
 		} else {
-			String languageName = lang.getName();
-			message = resources.getString(R.string.dictionary_load_error, languageName, errorType);
+			message = resources.getString(R.string.dictionary_load_error, lang.getName(), errorType);
 		}
 
 		title = generateTitle(-1);

src/io/github/sspanak/tt9/ui/UI.java

@@ -4,13 +4,8 @@ import android.content.Context;
 import android.content.Intent;
 import android.widget.Toast;
 
-import io.github.sspanak.tt9.Logger;
-import io.github.sspanak.tt9.R;
 import io.github.sspanak.tt9.ime.TraditionalT9;
-import io.github.sspanak.tt9.ime.modes.InputMode;
-import io.github.sspanak.tt9.languages.Language;
 import io.github.sspanak.tt9.preferences.PreferencesActivity;
-import io.github.sspanak.tt9.preferences.SettingsStore;
 
 public class UI {
 	public static void showAddWordDialog(TraditionalT9 tt9, int language, String currentWord) {

src/io/github/sspanak/tt9/ui/main/BaseMainLayout.java

@@ -9,7 +9,7 @@ import io.github.sspanak.tt9.ime.TraditionalT9;
 import io.github.sspanak.tt9.ui.main.keys.SoftKey;
 
 abstract class BaseMainLayout {
-	protected TraditionalT9 tt9;
+	protected final TraditionalT9 tt9;
 	private final int xml;
 
 	protected View view = null;
@@ -56,18 +56,6 @@ abstract class BaseMainLayout {
 		return view;
 	}
 
-	public void show() {
-		if (view != null) {
-			view.setVisibility(View.VISIBLE);
-		}
-	}
-
-	public void hide() {
-		if (view != null) {
-			view.setVisibility(View.GONE);
-		}
-	}
-
 	public void enableClickHandlers() {
 		for (SoftKey key : getKeys()) {
 			key.setTT9(tt9);

src/io/github/sspanak/tt9/ui/tray/StatusBar.java

@@ -19,17 +19,16 @@ public class StatusBar {
 	}
 
 
-	public StatusBar setText(String text) {
+	public void setText(String text) {
 		statusText = "[ " + text + " ]";
 		this.render();
 
-		return this;
 	}
 
-	public StatusBar setDarkTheme(boolean darkTheme) {
+	public void setDarkTheme(boolean darkTheme) {
 		if (statusView == null) {
 			Logger.w("StatusBar.setDarkTheme", "Not changing the theme of a NULL View.");
-			return this;
+			return;
 		}
 
 		Context context = statusView.getContext();
@@ -47,7 +46,6 @@ public class StatusBar {
 		statusView.setTextColor(color);
 		this.render();
 
-		return this;
 	}
 
 	private void render() {

src/io/github/sspanak/tt9/ui/tray/SuggestionsAdapter.java

@@ -71,7 +71,7 @@ public class SuggestionsAdapter extends RecyclerView.Adapter<SuggestionsAdapter.
 
 
 	public class ViewHolder extends RecyclerView.ViewHolder {
-		TextView suggestionItem;
+		final TextView suggestionItem;
 
 		ViewHolder(View itemView) {
 			super(itemView);

src/io/github/sspanak/tt9/ui/tray/SuggestionsBar.java

@@ -161,7 +161,7 @@ public class SuggestionsBar {
 	 * system context and theme.
 	 *
 	 * More info:
-	 * https://stackoverflow.com/questions/72382886/system-applies-night-mode-to-views-added-in-service-type-application-overlay
+	 * <a href="https://stackoverflow.com/questions/72382886/system-applies-night-mode-to-views-added-in-service-type-application-overlay">...</a>
 	 */
 	public void setDarkTheme(boolean darkEnabled) {
 		isDarkThemeEnabled = darkEnabled;