code cleanup: a simpler way of detecting the Android version

app/src/main/java/io/github/sspanak/tt9/db/customWords/AbstractExporter.java

@@ -5,7 +5,6 @@ import android.content.ContentResolver;
 import android.content.ContentValues;
 import android.media.MediaScannerConnection;
 import android.net.Uri;
-import android.os.Build;
 import android.os.Environment;
 import android.provider.MediaStore;
 
@@ -16,6 +15,7 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
 
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.util.Permissions;
 
 public abstract class AbstractExporter extends AbstractFileProcessor {
@@ -83,7 +83,7 @@ public abstract class AbstractExporter extends AbstractFileProcessor {
 
 
 	protected void write(Activity activity) throws Exception {
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+		if (DeviceInfo.AT_LEAST_ANDROID_10) {
 			writeAndroid10(activity);
 		} else {
 			writeLegacy(activity);
@@ -98,7 +98,7 @@ public abstract class AbstractExporter extends AbstractFileProcessor {
 
 	public String getOutputDir() {
 		// on some older phones, files may not be visible in the DOCUMENTS directory, so we use DOWNLOADS
-		return Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q ? Environment.DIRECTORY_DOCUMENTS : Environment.DIRECTORY_DOWNLOADS;
+		return DeviceInfo.AT_LEAST_ANDROID_10 ? Environment.DIRECTORY_DOCUMENTS : Environment.DIRECTORY_DOWNLOADS;
 	}
 
 

app/src/main/java/io/github/sspanak/tt9/hacks/DeviceInfo.java

@@ -1,31 +1,31 @@
 package io.github.sspanak.tt9.hacks;
 
 import android.content.Context;
-import android.content.pm.PackageManager;
 import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.os.Build;
-import android.view.KeyCharacterMap;
-import android.view.KeyEvent;
-
-import androidx.annotation.NonNull;
 
 import io.github.sspanak.tt9.R;
 
-public class DeviceInfo {
+public class DeviceInfo extends HardwareInfo {
-	private static Resources resources;
+	public static final boolean AT_LEAST_ANDROID_6 = Build.VERSION.SDK_INT >= Build.VERSION_CODES.M;
+	public static final boolean AT_LEAST_ANDROID_7 = Build.VERSION.SDK_INT >= Build.VERSION_CODES.N;
+	public static final boolean AT_LEAST_ANDROID_8 = Build.VERSION.SDK_INT >= Build.VERSION_CODES.O;
+	public static final boolean AT_LEAST_ANDROID_8_1 = Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1;
+	public static final boolean AT_LEAST_ANDROID_9 = Build.VERSION.SDK_INT >= Build.VERSION_CODES.P;
+	public static final boolean AT_LEAST_ANDROID_10 = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
+	public static final boolean AT_LEAST_ANDROID_11 = Build.VERSION.SDK_INT >= Build.VERSION_CODES.R;
+	public static final boolean AT_LEAST_ANDROID_12 = Build.VERSION.SDK_INT >= Build.VERSION_CODES.S;
+	public static final boolean AT_LEAST_ANDROID_13 = Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU;
+	public static final boolean AT_LEAST_ANDROID_14 = Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE;
+	public static final boolean AT_LEAST_ANDROID_15 = Build.VERSION.SDK_INT >= Build.VERSION_CODES.VANILLA_ICE_CREAM;
 
-	private static Resources getResources(Context context) {
-		if (resources == null) {
-			resources = context.getResources();
-		}
-		return resources;
-	}
 
 	public static boolean isLandscapeOrientation(Context context) {
 		return getResources(context).getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE;
 	}
 
+
 	public static int getNavigationBarHeight(Context context, boolean isLandscape) {
 		Resources resources = getResources(context);
 
@@ -40,73 +40,4 @@ public class DeviceInfo {
 			return navBarHeight;
 		}
 	}
-
-	public static int getScreenWidth(Context context) {
-		return getResources(context).getDisplayMetrics().widthPixels;
-	}
-
-	public static int getScreenHeight(Context context) {
-		return getResources(context).getDisplayMetrics().heightPixels;
-	}
-
-	public static float getScreenHeightDp(Context context) {
-		return getScreenHeight(context) / getResources(context).getDisplayMetrics().density;
-	}
-
-	public static float getScreenWidthDp(Context context) {
-		return getScreenWidth(context) / getResources(context).getDisplayMetrics().density;
-	}
-
-	public static boolean noBackspaceKey() {
-		return !KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_DEL) && !KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_CLEAR);
-	}
-
-	public static boolean noKeyboard(Context context) {
-		// all Xiaomi phones are only touchscreen, but some of them report they have a keyboard
-		// See: https://github.com/sspanak/tt9/issues/549
-		if (DeviceInfo.isXiaomi()) {
-			return true;
-		}
-
-		Configuration configuration = getResources(context).getConfiguration();
-
-		return
-			(configuration.keyboard == Configuration.KEYBOARD_NOKEYS || configuration.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_YES)
-			&& !KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_STAR)
-			&& !KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_POUND);
-	}
-
-	public static boolean noTouchScreen(Context context) {
-		return !context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_TOUCHSCREEN);
-	}
-
-	public static boolean isCatS22Flip() {
-		return Build.MANUFACTURER.equals("Cat") && Build.MODEL.contains("S22");
-	}
-
-	public static boolean isLgX100S() {
-		return Build.MANUFACTURER.equals("LGE") && Build.MODEL.contains("X100S");
-	}
-
-	public static boolean isQinF21() {
-		return Build.MANUFACTURER.equals("DuoQin") && Build.MODEL.contains("F21");
-	}
-
-	public static boolean isSonim() {
-		return Build.MANUFACTURER.equals("Sonimtech");
-	}
-
-	public static boolean isSonimGen2(Context context) {
-		return isSonim() && Build.VERSION.SDK_INT == Build.VERSION_CODES.R && noTouchScreen(context);
-	}
-
-	public static boolean isXiaomi() {
-		return Build.MANUFACTURER.equals("Xiaomi");
-	}
-
-	@NonNull
-	@Override
-	public String toString() {
-		return "\"" + Build.MANUFACTURER + "\" " + "\"" + Build.MODEL + "\"";
-	}
 }

app/src/main/java/io/github/sspanak/tt9/hacks/HardwareInfo.java

@@ -0,0 +1,107 @@
+package io.github.sspanak.tt9.hacks;
+
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.os.Build;
+import android.view.KeyCharacterMap;
+import android.view.KeyEvent;
+
+import androidx.annotation.NonNull;
+
+public class HardwareInfo {
+	private static Resources resources;
+
+
+	protected static Resources getResources(Context context) {
+		if (resources == null) {
+			resources = context.getResources();
+		}
+		return resources;
+	}
+
+
+	public static int getScreenWidth(Context context) {
+		return getResources(context).getDisplayMetrics().widthPixels;
+	}
+
+
+
+	public static int getScreenHeight(Context context) {
+		return getResources(context).getDisplayMetrics().heightPixels;
+	}
+
+
+	public static float getScreenHeightDp(Context context) {
+		return getScreenHeight(context) / getResources(context).getDisplayMetrics().density;
+	}
+
+
+	public static float getScreenWidthDp(Context context) {
+		return getScreenWidth(context) / getResources(context).getDisplayMetrics().density;
+	}
+
+
+	public static boolean noBackspaceKey() {
+		return !KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_DEL) && !KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_CLEAR);
+	}
+
+
+	public static boolean noKeyboard(Context context) {
+		// all Xiaomi phones are only touchscreen, but some of them report they have a keyboard
+		// See: https://github.com/sspanak/tt9/issues/549
+		if (isXiaomi()) {
+			return true;
+		}
+
+		Configuration configuration = getResources(context).getConfiguration();
+
+		return
+			(configuration.keyboard == Configuration.KEYBOARD_NOKEYS || configuration.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_YES)
+			&& !KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_STAR)
+			&& !KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_POUND);
+	}
+
+
+	public static boolean noTouchScreen(Context context) {
+		return !context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_TOUCHSCREEN);
+	}
+
+
+	public static boolean isCatS22Flip() {
+		return Build.MANUFACTURER.equals("Cat") && Build.MODEL.contains("S22");
+	}
+
+
+	public static boolean isLgX100S() {
+		return Build.MANUFACTURER.equals("LGE") && Build.MODEL.contains("X100S");
+	}
+
+
+	public static boolean isQinF21() {
+		return Build.MANUFACTURER.equals("DuoQin") && Build.MODEL.contains("F21");
+	}
+
+
+	public static boolean isSonim() {
+		return Build.MANUFACTURER.equals("Sonimtech");
+	}
+
+
+	public static boolean isSonimGen2(Context context) {
+		return isSonim() && DeviceInfo.AT_LEAST_ANDROID_11 && noTouchScreen(context);
+	}
+
+
+	public static boolean isXiaomi() {
+		return Build.MANUFACTURER.equals("Xiaomi");
+	}
+
+
+	@NonNull
+	@Override
+	public String toString() {
+		return "\"" + Build.MANUFACTURER + "\" " + "\"" + Build.MODEL + "\"";
+	}
+}

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

@@ -1,10 +1,9 @@
 package io.github.sspanak.tt9.ime;
 
-import android.os.Build;
-
 import io.github.sspanak.tt9.R;
 import io.github.sspanak.tt9.db.DataStore;
 import io.github.sspanak.tt9.db.words.DictionaryLoader;
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.ime.modes.InputMode;
 import io.github.sspanak.tt9.ime.modes.InputModeKind;
 import io.github.sspanak.tt9.languages.LanguageCollection;
@@ -126,7 +125,7 @@ abstract public class CommandHandler extends TextEditingHandler {
 		suggestionOps.cancelDelayedAccept();
 		stopVoiceInput();
 
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+		if (DeviceInfo.AT_LEAST_ANDROID_9) {
 			switchToPreviousInputMethod();
 			return;
 		}

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

@@ -1,6 +1,5 @@
 package io.github.sspanak.tt9.ime;
 
-import android.os.Build;
 import android.view.inputmethod.InputMethodManager;
 
 import io.github.sspanak.tt9.R;
@@ -80,7 +79,7 @@ abstract class UiHandler extends AbstractHandler {
 			return;
 		}
 
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+		if (DeviceInfo.AT_LEAST_ANDROID_9) {
 			requestShowSelf(DeviceInfo.isSonimGen2(getApplicationContext()) ? 0 : InputMethodManager.SHOW_IMPLICIT);
 		} else {
 			showWindow(true);

app/src/main/java/io/github/sspanak/tt9/ime/helpers/InputField.java

@@ -1,6 +1,5 @@
 package io.github.sspanak.tt9.ime.helpers;
 
-import android.os.Build;
 import android.view.inputmethod.EditorInfo;
 import android.view.inputmethod.InputConnection;
 
@@ -8,6 +7,7 @@ import androidx.annotation.Nullable;
 
 import java.util.ArrayList;
 
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.languages.Language;
 import io.github.sspanak.tt9.languages.LanguageCollection;
 
@@ -85,7 +85,7 @@ public class InputField {
 	 */
 	@Nullable
 	public Language getLanguage(ArrayList<Integer> allowedLanguageIds) {
-		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N || field == null || field.hintLocales == null) {
+		if (!DeviceInfo.AT_LEAST_ANDROID_7 || field == null || field.hintLocales == null) {
 			return null;
 		}
 

app/src/main/java/io/github/sspanak/tt9/ime/voice/VoiceInputError.java

@@ -1,12 +1,12 @@
 package io.github.sspanak.tt9.ime.voice;
 
 import android.content.Context;
-import android.os.Build;
 import android.speech.SpeechRecognizer;
 
 import androidx.annotation.NonNull;
 
 import io.github.sspanak.tt9.R;
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 
 public class VoiceInputError {
 	public final static int ERROR_NOT_AVAILABLE = 101;
@@ -35,9 +35,9 @@ public class VoiceInputError {
 			code == SpeechRecognizer.ERROR_NO_MATCH
 			|| code == SpeechRecognizer.ERROR_SPEECH_TIMEOUT
 			|| code == SpeechRecognizer.ERROR_AUDIO
-			|| (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE && code == SpeechRecognizer.ERROR_CANNOT_LISTEN_TO_DOWNLOAD_EVENTS)
+			|| (DeviceInfo.AT_LEAST_ANDROID_12 && code == SpeechRecognizer.ERROR_SERVER_DISCONNECTED)
-			|| (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU && code == SpeechRecognizer.ERROR_CANNOT_CHECK_SUPPORT)
+			|| (DeviceInfo.AT_LEAST_ANDROID_13 && code == SpeechRecognizer.ERROR_CANNOT_CHECK_SUPPORT)
-			|| (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S && code == SpeechRecognizer.ERROR_SERVER_DISCONNECTED);
+			|| (DeviceInfo.AT_LEAST_ANDROID_14 && code == SpeechRecognizer.ERROR_CANNOT_LISTEN_TO_DOWNLOAD_EVENTS);
 	}
 
 
@@ -72,51 +72,36 @@ public class VoiceInputError {
 
 
 	private static String codeToDebugString(int code) {
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE && code == SpeechRecognizer.ERROR_CANNOT_LISTEN_TO_DOWNLOAD_EVENTS) {
+		if (DeviceInfo.AT_LEAST_ANDROID_14 && code == SpeechRecognizer.ERROR_CANNOT_LISTEN_TO_DOWNLOAD_EVENTS) {
 			return "Cannot listen to download events.";
 		}
 
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU && code == SpeechRecognizer.ERROR_CANNOT_CHECK_SUPPORT) {
+		if (DeviceInfo.AT_LEAST_ANDROID_13 && code == SpeechRecognizer.ERROR_CANNOT_CHECK_SUPPORT) {
 			return "Cannot check voice input support.";
 		}
 
-		String message = codeToDebugString31(code);
+		String message = codeToDebugStringCommon(code);
-		message = message != null ? message : codeToDebugStringCommon(code);
 		message = message != null ? message : "Unknown voice input error code: " + code;
 
 		return message;
 	}
 
 
-	private static String codeToDebugString31(int code) {
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
-			switch (code) {
-				case SpeechRecognizer.ERROR_TOO_MANY_REQUESTS:
-					return "Server overloaded. Try again later.";
-				case SpeechRecognizer.ERROR_SERVER_DISCONNECTED:
-					return "Lost connection to the server.";
-				case SpeechRecognizer.ERROR_LANGUAGE_NOT_SUPPORTED:
-					return "Language not supported.";
-				case SpeechRecognizer.ERROR_LANGUAGE_UNAVAILABLE:
-					return "Language missing. Try again later.";
-			}
-		}
-
-		return null;
-	}
-
-
 	private static String codeToDebugStringCommon(int code) {
 		return switch (code) {
 			case SpeechRecognizer.ERROR_AUDIO -> "Audio capture error.";
 			case SpeechRecognizer.ERROR_CLIENT -> "Speech recognition client error.";
 			case SpeechRecognizer.ERROR_INSUFFICIENT_PERMISSIONS -> "No microphone permissions.";
+			case SpeechRecognizer.ERROR_LANGUAGE_NOT_SUPPORTED -> "Language not supported.";
+			case SpeechRecognizer.ERROR_LANGUAGE_UNAVAILABLE -> "Language missing. Try again later.";
 			case SpeechRecognizer.ERROR_NETWORK -> "No network connection.";
 			case SpeechRecognizer.ERROR_NETWORK_TIMEOUT -> "Network timeout.";
 			case SpeechRecognizer.ERROR_NO_MATCH -> "No match.";
 			case SpeechRecognizer.ERROR_RECOGNIZER_BUSY -> "Voice input service is busy.";
 			case SpeechRecognizer.ERROR_SERVER -> "Speech recognition server error.";
+			case SpeechRecognizer.ERROR_SERVER_DISCONNECTED -> "Lost connection to the server.";
 			case SpeechRecognizer.ERROR_SPEECH_TIMEOUT -> "No speech detected.";
+			case SpeechRecognizer.ERROR_TOO_MANY_REQUESTS -> "Server overloaded. Try again later.";
 			case ERROR_NOT_AVAILABLE -> "Voice input is not available.";
 			case ERROR_INVALID_LANGUAGE -> "Invalid language for voice input.";
 			case ERROR_CANNOT_BIND_TO_VOICE_SERVICE -> "Cannot bind to the current voice input service.";

app/src/main/java/io/github/sspanak/tt9/ime/voice/VoiceInputOps.java

@@ -2,7 +2,6 @@ package io.github.sspanak.tt9.ime.voice;
 
 import android.content.Context;
 import android.content.Intent;
-import android.os.Build;
 import android.speech.RecognizerIntent;
 import android.speech.SpeechRecognizer;
 
@@ -11,6 +10,7 @@ import androidx.annotation.NonNull;
 import java.util.ArrayList;
 
 import io.github.sspanak.tt9.R;
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.languages.Language;
 import io.github.sspanak.tt9.util.ConsumerCompat;
 import io.github.sspanak.tt9.util.Logger;
@@ -35,7 +35,7 @@ public class VoiceInputOps {
 		ConsumerCompat<String> onStop,
 		ConsumerCompat<VoiceInputError> onError
 	) {
-		isOnDeviceRecognitionAvailable = Build.VERSION.SDK_INT >= Build.VERSION_CODES.S && SpeechRecognizer.isOnDeviceRecognitionAvailable(ims);
+		isOnDeviceRecognitionAvailable = DeviceInfo.AT_LEAST_ANDROID_12 && SpeechRecognizer.isOnDeviceRecognitionAvailable(ims);
 		isRecognitionAvailable = SpeechRecognizer.isRecognitionAvailable(ims);
 		listener = new VoiceListener(ims, onStart, this::onStop, this::onError);
 
@@ -47,7 +47,7 @@ public class VoiceInputOps {
 
 
 	private void createRecognizer() {
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S && isOnDeviceRecognitionAvailable) {
+		if (DeviceInfo.AT_LEAST_ANDROID_12 && isOnDeviceRecognitionAvailable) {
 			speechRecognizer = SpeechRecognizer.createOnDeviceSpeechRecognizer(ims);
 		} else if (isRecognitionAvailable) {
 			speechRecognizer = SpeechRecognizer.createSpeechRecognizer(ims);

app/src/main/java/io/github/sspanak/tt9/preferences/items/ItemSearch.java

@@ -2,7 +2,6 @@ package io.github.sspanak.tt9.preferences.items;
 
 import android.content.Context;
 import android.graphics.drawable.Drawable;
-import android.os.Build;
 import android.util.AttributeSet;
 
 import androidx.annotation.NonNull;
@@ -11,13 +10,11 @@ import androidx.appcompat.content.res.AppCompatResources;
 import androidx.preference.PreferenceViewHolder;
 
 import io.github.sspanak.tt9.R;
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.languages.LanguageCollection;
 import io.github.sspanak.tt9.languages.LanguageKind;
 
 abstract public class ItemSearch extends ItemTextInput {
-	private final boolean isModernDevice = Build.VERSION.SDK_INT >= Build.VERSION_CODES.S;
-
-
 	public ItemSearch(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
 		super(context, attrs, defStyleAttr, defStyleRes);
 	}
@@ -33,7 +30,7 @@ abstract public class ItemSearch extends ItemTextInput {
 
 
 	@Override protected int getLargeLayout() {
-		return isModernDevice ? R.layout.pref_input_text : R.layout.pref_input_text_large;
+		return DeviceInfo.AT_LEAST_ANDROID_12 ? R.layout.pref_input_text : R.layout.pref_input_text_large;
 	}
 
 

app/src/main/java/io/github/sspanak/tt9/preferences/items/ItemText.java

@@ -1,10 +1,9 @@
 package io.github.sspanak.tt9.preferences.items;
 
-import android.os.Build;
-
 import androidx.preference.Preference;
 
 import io.github.sspanak.tt9.R;
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.preferences.PreferencesActivity;
 import io.github.sspanak.tt9.ui.UI;
 import io.github.sspanak.tt9.util.Clipboard;
@@ -29,7 +28,7 @@ public class ItemText extends ItemClickable {
 			p.getSummary()
 		);
 
-		if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.S_V2) {
+		if (!DeviceInfo.AT_LEAST_ANDROID_13) {
 			UI.toast(activity, "\"" + Clipboard.getPreview(activity) + "\" copied.");
 		}
 

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

@@ -1,12 +1,12 @@
 package io.github.sspanak.tt9.preferences.screens;
 
-import android.os.Build;
 import android.os.Bundle;
 import android.view.MenuItem;
 
 import androidx.annotation.NonNull;
 import androidx.preference.PreferenceFragmentCompat;
 
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.preferences.PreferencesActivity;
 import io.github.sspanak.tt9.preferences.custom.ScreenPreferencesList;
 import io.github.sspanak.tt9.preferences.settings.SettingsUI;
@@ -97,7 +97,7 @@ abstract public class BaseScreenFragment extends PreferenceFragmentCompat {
 	public void resetFontSize(boolean reloadList) {
 		initPreferencesList();
 		preferencesList.getAll(reloadList, true);
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+		if (DeviceInfo.AT_LEAST_ANDROID_12) {
 			preferencesList.setFontSize(SettingsUI.FONT_SIZE_DEFAULT);
 		} else {
 			preferencesList.setFontSize(activity.getSettings().getSettingsFontSize());

app/src/main/java/io/github/sspanak/tt9/preferences/screens/appearance/ItemSelectSettingsFontSize.java

@@ -1,13 +1,12 @@
 package io.github.sspanak.tt9.preferences.screens.appearance;
 
-import android.os.Build;
-
 import androidx.preference.DropDownPreference;
 import androidx.preference.Preference;
 
 import java.util.LinkedHashMap;
 
 import io.github.sspanak.tt9.R;
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.preferences.items.ItemDropDown;
 import io.github.sspanak.tt9.preferences.settings.SettingsStore;
 
@@ -21,7 +20,7 @@ public class ItemSelectSettingsFontSize extends ItemDropDown {
 	}
 
 	public ItemDropDown populate() {
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+		if (DeviceInfo.AT_LEAST_ANDROID_12) {
 			if (item != null) item.setVisible(false);
 			return this;
 		}

app/src/main/java/io/github/sspanak/tt9/preferences/settings/SettingsHacks.java

@@ -1,7 +1,6 @@
 package io.github.sspanak.tt9.preferences.settings;
 
 import android.content.Context;
-import android.os.Build;
 
 import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.preferences.screens.debug.ItemInputHandlingMode;
@@ -38,7 +37,7 @@ class SettingsHacks extends BaseSettings {
 	/************* hack settings *************/
 
 	public int getSuggestionScrollingDelay() {
-		boolean defaultOn = DeviceInfo.noTouchScreen(context) && Build.VERSION.SDK_INT < Build.VERSION_CODES.Q;
+		boolean defaultOn = DeviceInfo.noTouchScreen(context) && !DeviceInfo.AT_LEAST_ANDROID_10;
 		return prefs.getBoolean("pref_alternative_suggestion_scrolling", defaultOn) ? 200 : 0;
 	}
 

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

@@ -1,15 +1,16 @@
 package io.github.sspanak.tt9.ui;
 
-import android.os.Build;
 import android.view.View;
 import android.view.WindowInsets;
 
 import androidx.appcompat.app.AppCompatActivity;
 
+import io.github.sspanak.tt9.hacks.DeviceInfo;
+
 
 public class EdgeToEdgeActivity extends AppCompatActivity {
 	public void preventEdgeToEdge(View view) {
-		if (view == null || Build.VERSION.SDK_INT < Build.VERSION_CODES.VANILLA_ICE_CREAM) {
+		if (view == null || !DeviceInfo.AT_LEAST_ANDROID_15) {
 			return;
 		}
 
@@ -33,13 +34,13 @@ public class EdgeToEdgeActivity extends AppCompatActivity {
 	}
 
 	private void applyThemeToSystemUi() {
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+		if (DeviceInfo.AT_LEAST_ANDROID_10) {
 			getWindow().setStatusBarContrastEnforced(true);
 		}
 	}
 
 	private WindowInsets getInsets(View view) {
-		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
+		if (!DeviceInfo.AT_LEAST_ANDROID_6) {
 			return null;
 		}
 

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

@@ -5,7 +5,6 @@ import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.inputmethodservice.InputMethodService;
-import android.os.Build;
 import android.os.Looper;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.Toast;
@@ -16,6 +15,7 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 
 import java.util.HashMap;
 
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.preferences.PreferencesActivity;
 
 public class UI {
@@ -56,8 +56,8 @@ public class UI {
 
 
 	public static void confirm(Context context, String title, String message, String OKLabel, Runnable onOk, Runnable onCancel) {
-		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.S) {
+		if (DeviceInfo.AT_LEAST_ANDROID_12) {
-			new AlertDialog.Builder(context)
+			new MaterialAlertDialogBuilder(context)
 				.setTitle(title)
 				.setMessage(message)
 				.setPositiveButton(OKLabel, (dialog, whichButton) -> { if (onOk != null) onOk.run(); })
@@ -65,7 +65,7 @@ public class UI {
 				.setCancelable(false)
 				.show();
 		} else {
-			new MaterialAlertDialogBuilder(context)
+			new AlertDialog.Builder(context)
 				.setTitle(title)
 				.setMessage(message)
 				.setPositiveButton(OKLabel, (dialog, whichButton) -> { if (onOk != null) onOk.run(); })

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

@@ -1,11 +1,11 @@
 package io.github.sspanak.tt9.ui;
 
-import android.os.Build;
 import android.view.HapticFeedbackConstants;
 import android.view.View;
 
 import androidx.annotation.NonNull;
 
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.preferences.settings.SettingsStore;
 import io.github.sspanak.tt9.ui.main.keys.BaseClickableKey;
 import io.github.sspanak.tt9.ui.main.keys.SoftKeyNumber;
@@ -28,7 +28,7 @@ public class Vibration {
 	}
 
 	public static int getHoldVibration() {
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+		if (DeviceInfo.AT_LEAST_ANDROID_11) {
 			return HapticFeedbackConstants.CONFIRM;
 		} else {
 			return HapticFeedbackConstants.VIRTUAL_KEY;
@@ -36,7 +36,7 @@ public class Vibration {
 	}
 
 	public static int getReleaseVibration() {
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
+		if (DeviceInfo.AT_LEAST_ANDROID_8_1) {
 			return HapticFeedbackConstants.KEYBOARD_RELEASE;
 		} else {
 			return HapticFeedbackConstants.VIRTUAL_KEY;

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

@@ -2,13 +2,13 @@ package io.github.sspanak.tt9.ui;
 
 import android.app.Activity;
 import android.content.Intent;
-import android.os.Build;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
 
 import androidx.annotation.NonNull;
 
 import io.github.sspanak.tt9.R;
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.util.Clipboard;
 import io.github.sspanak.tt9.util.Logger;
 
@@ -26,9 +26,9 @@ public class WebViewSafeClient extends WebViewClient {
 			return super.shouldOverrideUrlLoading(view, url);
 		}
 
-		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q || !shareLink(url)) {
+		if (!DeviceInfo.AT_LEAST_ANDROID_10 || !shareLink(url)) {
 			Clipboard.copy(activity, url);
-			if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.S_V2) {
+			if (!DeviceInfo.AT_LEAST_ANDROID_13) {
 				UI.toastShortSingle(activity, R.string.help_url_copied);
 			}
 		}

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

@@ -3,13 +3,13 @@ package io.github.sspanak.tt9.ui.dialogs;
 import android.content.Context;
 import android.content.Intent;
 import android.inputmethodservice.InputMethodService;
-import android.os.Build;
 
 import androidx.annotation.NonNull;
 
 import io.github.sspanak.tt9.R;
 import io.github.sspanak.tt9.db.DataStore;
 import io.github.sspanak.tt9.db.entities.AddWordResult;
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.languages.Language;
 import io.github.sspanak.tt9.languages.LanguageCollection;
 import io.github.sspanak.tt9.preferences.settings.SettingsStore;
@@ -33,7 +33,7 @@ public class AddWordDialog extends PopupDialog {
 				.setSettings(new SettingsStore(context))
 				// The main theme does not work on Android <= 11 and the _AddWord theme does not work on 12+.
 				// Not sure why since they inherit from the same parent, but it is what it is.
-				.setTheme(Build.VERSION.SDK_INT < Build.VERSION_CODES.S ? R.style.TTheme_AddWord : R.style.TTheme)
+				.setTheme(DeviceInfo.AT_LEAST_ANDROID_12 ? R.style.TTheme : R.style.TTheme_AddWord)
 				.build(),
 			activityFinisher
 		);

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

@@ -64,7 +64,7 @@ abstract class BaseMainLayout {
 
 
 	protected WindowInsets onApplyInsets(@NonNull View v, @NonNull WindowInsets windowInsets) {
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.VANILLA_ICE_CREAM) {
+		if (DeviceInfo.AT_LEAST_ANDROID_15) {
 			return preventEdgeToEdge(v, windowInsets);
 		} else {
 			return windowInsets;
@@ -100,7 +100,7 @@ abstract class BaseMainLayout {
 	 * is re-created and it is not yet possible to get the new window insets.
  	 */
 	public void preventEdgeToEdge() {
-		if (tt9 == null || view == null || Build.VERSION.SDK_INT < Build.VERSION_CODES.VANILLA_ICE_CREAM) {
+		if (tt9 == null || view == null || !DeviceInfo.AT_LEAST_ANDROID_15) {
 			return;
 		}
 
@@ -113,7 +113,7 @@ abstract class BaseMainLayout {
 
 
 	void requestPreventEdgeToEdge() {
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.VANILLA_ICE_CREAM && view != null) {
+		if (view != null && DeviceInfo.AT_LEAST_ANDROID_15) {
 			view.requestApplyInsets();
 		}
 	}
@@ -248,7 +248,7 @@ abstract class BaseMainLayout {
 		int width = tt9.getSettings().getWidthPercent();
 
 		return
-			Build.VERSION.SDK_INT >= Build.VERSION_CODES.VANILLA_ICE_CREAM
+			DeviceInfo.AT_LEAST_ANDROID_15
 			&& ((isLandscape && width >= 75) || (!isLandscape && width >= 65));
 	}
 

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

@@ -1,11 +1,11 @@
 package io.github.sspanak.tt9.ui.main;
 
-import android.os.Build;
 import android.view.Gravity;
 import android.view.View;
 
 import androidx.annotation.NonNull;
 
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.ime.TraditionalT9;
 import io.github.sspanak.tt9.preferences.settings.SettingsStore;
 import io.github.sspanak.tt9.ui.Vibration;
@@ -29,7 +29,7 @@ public class ResizableMainView extends MainView implements View.OnAttachStateCha
 
 
 	private void calculateSnapHeights() {
-		boolean forceRecalculate = Build.VERSION.SDK_INT >= Build.VERSION_CODES.VANILLA_ICE_CREAM;
+		boolean forceRecalculate = DeviceInfo.AT_LEAST_ANDROID_15;
 
 		heightNumpad = new MainLayoutNumpad(tt9).getHeight(forceRecalculate);
 		heightSmall = new MainLayoutSmall(tt9).getHeight(forceRecalculate);

app/src/main/java/io/github/sspanak/tt9/ui/main/keys/SoftKey.java

@@ -120,7 +120,7 @@ public class SoftKey extends BaseClickableKey {
 		if (
 			getNoEmojiTitle() > 0
 			&& (
-				Characters.noEmojiSupported()
+				Characters.NO_EMOJI_SUPPORT
 				|| (new Text(getText().toString()).startsWithGraphic() && !new Paint().hasGlyph(getText().toString()))
 			)
 		) {

app/src/main/java/io/github/sspanak/tt9/ui/notifications/DictionaryNotification.java

@@ -5,12 +5,12 @@ import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.content.Context;
 import android.content.res.Resources;
-import android.os.Build;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.core.app.NotificationCompat;
 
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.languages.Language;
 
 public abstract class DictionaryNotification {
@@ -43,7 +43,7 @@ public abstract class DictionaryNotification {
 	protected abstract PendingIntent createNavigationIntent(@NonNull Context context, @Nullable Language language);
 
 	private NotificationCompat.Builder getNotificationBuilderCompat(Context context) {
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+		if (DeviceInfo.AT_LEAST_ANDROID_8) {
 			manager.createNotificationChannel(new NotificationChannel(
 				NOTIFICATION_CHANNEL_ID,
 				"Dictionary Status",

app/src/main/java/io/github/sspanak/tt9/util/Permissions.java

@@ -4,12 +4,13 @@ package io.github.sspanak.tt9.util;
 import android.Manifest;
 import android.app.Activity;
 import android.content.pm.PackageManager;
-import android.os.Build;
 
 import androidx.annotation.NonNull;
 
 import java.util.HashMap;
 
+import io.github.sspanak.tt9.hacks.DeviceInfo;
+
 public class Permissions {
 	private static final HashMap<String, Boolean> firstTimeAsking = new HashMap<>();
 	@NonNull private final Activity activity;
@@ -20,7 +21,7 @@ public class Permissions {
 
 	public boolean noPostNotifications() {
 		return
-			Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU
+			DeviceInfo.AT_LEAST_ANDROID_13
 			&& isRefused(Manifest.permission.POST_NOTIFICATIONS)
 			&& (
 				Boolean.TRUE.equals(firstTimeAsking.getOrDefault(Manifest.permission.POST_NOTIFICATIONS, true))
@@ -29,7 +30,7 @@ public class Permissions {
 	}
 
 	public void requestPostNotifications() {
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+		if (DeviceInfo.AT_LEAST_ANDROID_13) {
 			firstTimeAsking.put(Manifest.permission.POST_NOTIFICATIONS, false);
 			requestPermission(Manifest.permission.POST_NOTIFICATIONS);
 		}
@@ -42,25 +43,25 @@ public class Permissions {
 
 	public boolean noWriteStorage() {
 		return
-			Build.VERSION.SDK_INT < Build.VERSION_CODES.R
+			!DeviceInfo.AT_LEAST_ANDROID_11
 			&& isRefused(Manifest.permission.WRITE_EXTERNAL_STORAGE);
 	}
 
 	public void requestWriteStorage() {
-		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.R) {
+		if (!DeviceInfo.AT_LEAST_ANDROID_11) {
 			requestPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE);
 		}
 	}
 
 	private void requestPermission(String permission) {
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+		if (DeviceInfo.AT_LEAST_ANDROID_6) {
 			activity.requestPermissions(new String[] { permission }, 0);
 		}
 	}
 
 	private boolean isRefused(String permission) {
 		return
-			Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
+			DeviceInfo.AT_LEAST_ANDROID_6
 			&& activity.checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED;
 	}
 }

app/src/main/java/io/github/sspanak/tt9/util/SystemSettings.java

@@ -1,7 +1,6 @@
 package io.github.sspanak.tt9.util;
 
 import android.content.Context;
-import android.os.Build;
 import android.os.LocaleList;
 import android.provider.Settings;
 import android.view.Window;
@@ -14,6 +13,8 @@ import androidx.annotation.Nullable;
 
 import java.util.Locale;
 
+import io.github.sspanak.tt9.hacks.DeviceInfo;
+
 
 public class SystemSettings {
 	private static InputMethodManager inputManager;
@@ -46,7 +47,7 @@ public class SystemSettings {
 
 	@NonNull
 	public static String getLocale() {
-		Locale locale = Build.VERSION.SDK_INT >= Build.VERSION_CODES.N ? LocaleList.getDefault().get(0) : Locale.getDefault();
+		Locale locale = DeviceInfo.AT_LEAST_ANDROID_7 ? LocaleList.getDefault().get(0) : Locale.getDefault();
 		String country = locale.getCountry();
 		String language = locale.getLanguage();
 
@@ -77,7 +78,7 @@ public class SystemSettings {
 	 * @see : <a href="https://stackoverflow.com/a/77240330">the only working solution</a>.
 	 */
 	public static void setNavigationBarDarkTheme(@Nullable Window window, boolean dark) {
-		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.R) {
+		if (!DeviceInfo.AT_LEAST_ANDROID_11) {
 			return;
 		}
 

app/src/main/java/io/github/sspanak/tt9/util/chars/Emoji.java

@@ -1,12 +1,15 @@
 package io.github.sspanak.tt9.util.chars;
 
 import android.graphics.Paint;
-import android.os.Build;
 
 import java.util.ArrayList;
 import java.util.Arrays;
 
+import io.github.sspanak.tt9.hacks.DeviceInfo;
+
 class Emoji extends Punctuation {
+	final public static boolean NO_EMOJI_SUPPORT = !DeviceInfo.AT_LEAST_ANDROID_6;
+
 	final private static ArrayList<String> TextEmoticons = new ArrayList<>(Arrays.asList(
 		":)", ":D", ":P", ";)", "\\m/", ":-O", ":|", ":("
 	));
@@ -34,12 +37,8 @@ class Emoji extends Punctuation {
 		return !(ch < 256 || Character.isLetterOrDigit(ch) || Character.isAlphabetic(ch));
 	}
 
-	public static boolean noEmojiSupported() {
-		return Build.VERSION.SDK_INT < Build.VERSION_CODES.M;
-	}
-
 	public static ArrayList<String> getEmoji(int level) {
-		if (noEmojiSupported()) {
+		if (NO_EMOJI_SUPPORT) {
 			return new ArrayList<>(TextEmoticons);
 		}
 
@@ -59,6 +58,6 @@ class Emoji extends Punctuation {
 	}
 
 	public static int getMaxEmojiLevel() {
-		return noEmojiSupported() ? 1 : Emoji.size();
+		return NO_EMOJI_SUPPORT ? 1 : Emoji.size();
 	}
 }

app/src/main/java/io/github/sspanak/tt9/util/chars/Punctuation.java

@@ -1,17 +1,17 @@
 package io.github.sspanak.tt9.util.chars;
 
 import android.graphics.Paint;
-import android.os.Build;
 
 import java.util.ArrayList;
 import java.util.Arrays;
 
+import io.github.sspanak.tt9.hacks.DeviceInfo;
 import io.github.sspanak.tt9.languages.Language;
 import io.github.sspanak.tt9.languages.LanguageKind;
 
 class Punctuation {
 	public static final String GR_QUESTION_MARK = ";";
-	public static final String NEW_LINE = Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && new Paint().hasGlyph("⏎") ? "⏎" : "\\n";
+	public static final String NEW_LINE = DeviceInfo.AT_LEAST_ANDROID_6 && new Paint().hasGlyph("⏎") ? "⏎" : "\\n";
 	public static final String ZWJ = "\u200D";
 	public static final String ZWJ_GRAPHIC = "ZWJ";
 	public static final String ZWNJ = "\u200C";