Option to change app language #282

.idea/gradle.xml

@@ -7,7 +7,7 @@
         <option name="testRunner" value="GRADLE" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleJvm" value="Embedded JDK" />
+        <option name="gradleJvm" value="jbr-17" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />

app/build.gradle

@@ -90,6 +90,7 @@ dependencies {
 	implementation 'org.jetbrains.kotlin:kotlin-stdlib:1.8.0'
 	implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.4'
 
+	implementation "androidx.appcompat:appcompat:1.6.0"
 	implementation 'androidx.core:core-ktx:1.9.0'
 	implementation 'androidx.activity:activity-ktx:1.6.1'
 	implementation 'androidx.fragment:fragment-ktx:1.5.5'

app/src/main/java/org/koitharu/kotatsu/KotatsuApp.kt

@@ -50,6 +50,7 @@ class KotatsuApp : Application(), Configuration.Provider {
 			enableStrictMode()
 		}
 		AppCompatDelegate.setDefaultNightMode(settings.theme)
+		AppCompatDelegate.setApplicationLocales(settings.appLocales)
 		setupActivityLifecycleCallbacks()
 		processLifecycleScope.launch(Dispatchers.Default) {
 			setupDatabaseObservers()

app/src/main/java/org/koitharu/kotatsu/core/prefs/AppSettings.kt

@@ -7,6 +7,7 @@ import android.provider.Settings
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.collection.arraySetOf
 import androidx.core.content.edit
+import androidx.core.os.LocaleListCompat
 import androidx.preference.PreferenceManager
 import com.google.android.material.color.DynamicColors
 import dagger.hilt.android.qualifiers.ApplicationContext
@@ -79,6 +80,17 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		get() = prefs.getInt(KEY_GRID_SIZE, 100)
 		set(value) = prefs.edit { putInt(KEY_GRID_SIZE, value) }
 
+	var appLocales: LocaleListCompat
+		get() {
+			val raw = prefs.getString(KEY_APP_LOCALE, null)
+			return LocaleListCompat.forLanguageTags(raw)
+		}
+		set(value) {
+			prefs.edit {
+				putString(KEY_APP_LOCALE, value.toLanguageTags())
+			}
+		}
+
 	val readerPageSwitch: Set<String>
 		get() = prefs.getStringSet(KEY_READER_SWITCHERS, null) ?: setOf(PAGE_SWITCH_TAPS)
 
@@ -358,6 +370,7 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_WEBTOON_ZOOM = "webtoon_zoom"
 		const val KEY_SHELF_SECTIONS = "shelf_sections_2"
 		const val KEY_PREFETCH_CONTENT = "prefetch_content"
+		const val KEY_APP_LOCALE = "app_locale"
 
 		// About
 		const val KEY_APP_UPDATE = "app_update"

app/src/main/java/org/koitharu/kotatsu/settings/AppearanceSettingsFragment.kt

@@ -1,27 +1,38 @@
 package org.koitharu.kotatsu.settings
 
+import android.content.Context
 import android.content.Intent
 import android.content.SharedPreferences
+import android.net.Uri
+import android.os.Build
 import android.os.Bundle
+import android.provider.Settings
 import android.view.View
 import androidx.appcompat.app.AppCompatDelegate
+import androidx.core.app.LocaleManagerCompat
 import androidx.core.view.postDelayed
 import androidx.preference.ListPreference
 import androidx.preference.Preference
 import androidx.preference.TwoStatePreference
 import com.google.android.material.color.DynamicColors
 import dagger.hilt.android.AndroidEntryPoint
-import java.util.*
-import javax.inject.Inject
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.ui.BasePreferenceFragment
 import org.koitharu.kotatsu.base.ui.util.ActivityRecreationHandle
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.prefs.ListMode
 import org.koitharu.kotatsu.parsers.util.names
+import org.koitharu.kotatsu.parsers.util.toTitleCase
 import org.koitharu.kotatsu.settings.protect.ProtectSetupActivity
+import org.koitharu.kotatsu.settings.utils.ActivityListPreference
 import org.koitharu.kotatsu.settings.utils.SliderPreference
+import org.koitharu.kotatsu.utils.ext.getLocalesConfig
+import org.koitharu.kotatsu.utils.ext.map
 import org.koitharu.kotatsu.utils.ext.setDefaultValueCompat
+import org.koitharu.kotatsu.utils.ext.toList
+import java.util.Date
+import java.util.Locale
+import javax.inject.Inject
 
 @AndroidEntryPoint
 class AppearanceSettingsFragment :
@@ -52,7 +63,7 @@ class AppearanceSettingsFragment :
 			entries = entryValues.map { value ->
 				val formattedDate = settings.getDateFormat(value.toString()).format(now)
 				if (value == "") {
-					"${context.getString(R.string.system_default)} ($formattedDate)"
+					getString(R.string.default_s, formattedDate)
 				} else {
 					formattedDate
 				}
@@ -62,6 +73,20 @@ class AppearanceSettingsFragment :
 		}
 		findPreference<TwoStatePreference>(AppSettings.KEY_PROTECT_APP)
 			?.isChecked = !settings.appPassword.isNullOrEmpty()
+		findPreference<ActivityListPreference>(AppSettings.KEY_APP_LOCALE)?.run {
+			initLocalePicker(this)
+			if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+				activityIntent = Intent(
+					Settings.ACTION_APP_LOCALE_SETTINGS,
+					Uri.fromParts("package", context.packageName, null),
+				)
+			}
+			summaryProvider = Preference.SummaryProvider<ActivityListPreference> {
+				val locale = AppCompatDelegate.getApplicationLocales().get(0)
+				locale?.getDisplayName(locale)?.toTitleCase(locale) ?: getString(R.string.automatic)
+			}
+			setDefaultValueCompat("")
+		}
 	}
 
 	override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
@@ -79,16 +104,23 @@ class AppearanceSettingsFragment :
 			AppSettings.KEY_THEME -> {
 				AppCompatDelegate.setDefaultNightMode(settings.theme)
 			}
+
 			AppSettings.KEY_DYNAMIC_THEME -> {
 				postRestart()
 			}
+
 			AppSettings.KEY_THEME_AMOLED -> {
 				postRestart()
 			}
+
 			AppSettings.KEY_APP_PASSWORD -> {
 				findPreference<TwoStatePreference>(AppSettings.KEY_PROTECT_APP)
 					?.isChecked = !settings.appPassword.isNullOrEmpty()
 			}
+
+			AppSettings.KEY_APP_LOCALE -> {
+				AppCompatDelegate.setApplicationLocales(settings.appLocales)
+			}
 		}
 	}
 
@@ -104,6 +136,7 @@ class AppearanceSettingsFragment :
 				}
 				true
 			}
+
 			else -> super.onPreferenceTreeClick(preference)
 		}
 	}
@@ -113,4 +146,45 @@ class AppearanceSettingsFragment :
 			activityRecreationHandle.recreateAll()
 		}
 	}
+
+	private fun initLocalePicker(preference: ListPreference) {
+		val locales = resources.getLocalesConfig()
+			.toList()
+			.sortedWith(LocaleComparator(preference.context))
+		preference.entries = Array(locales.size + 1) { i ->
+			if (i == 0) {
+				getString(R.string.automatic)
+			} else {
+				val lc = locales[i - 1]
+				lc.getDisplayName(lc).toTitleCase(lc)
+			}
+		}
+		preference.entryValues = Array(locales.size + 1) { i ->
+			if (i == 0) {
+				""
+			} else {
+				locales[i - 1].toLanguageTag()
+			}
+		}
+	}
+
+	private class LocaleComparator(context: Context) : Comparator<Locale> {
+
+		private val deviceLocales = LocaleManagerCompat.getSystemLocales(context)
+			.map { it.language }
+
+		override fun compare(a: Locale, b: Locale): Int {
+			return if (a === b) {
+				0
+			} else {
+				val indexA = deviceLocales.indexOf(a.language)
+				val indexB = deviceLocales.indexOf(b.language)
+				if (indexA == -1 && indexB == -1) {
+					compareValues(a.language, b.language)
+				} else {
+					-2 - (indexA - indexB)
+				}
+			}
+		}
+	}
 }

app/src/main/java/org/koitharu/kotatsu/settings/utils/ActivityListPreference.kt

@@ -0,0 +1,38 @@
+package org.koitharu.kotatsu.settings.utils
+
+import android.content.ActivityNotFoundException
+import android.content.Context
+import android.content.Intent
+import android.util.AttributeSet
+import androidx.preference.ListPreference
+import org.koitharu.kotatsu.utils.ext.printStackTraceDebug
+
+class ActivityListPreference : ListPreference {
+
+	var activityIntent: Intent? = null
+
+	constructor(
+		context: Context,
+		attrs: AttributeSet?,
+		defStyleAttr: Int,
+		defStyleRes: Int
+	) : super(context, attrs, defStyleAttr, defStyleRes)
+
+	constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr)
+	constructor(context: Context, attrs: AttributeSet?) : super(context, attrs)
+	constructor(context: Context) : super(context)
+
+	override fun onClick() {
+		val intent = activityIntent
+		if (intent == null) {
+			super.onClick()
+			return
+		}
+		try {
+			context.startActivity(intent)
+		} catch (e: ActivityNotFoundException) {
+			e.printStackTraceDebug()
+			super.onClick()
+		}
+	}
+}

app/src/main/java/org/koitharu/kotatsu/utils/ext/AndroidExt.kt

@@ -8,6 +8,7 @@ import android.content.OperationApplicationException
 import android.content.SharedPreferences
 import android.content.SyncResult
 import android.content.pm.ResolveInfo
+import android.content.res.Resources
 import android.database.SQLException
 import android.graphics.Color
 import android.net.ConnectivityManager
@@ -20,6 +21,7 @@ import android.view.Window
 import androidx.activity.result.ActivityResultLauncher
 import androidx.annotation.IntegerRes
 import androidx.core.app.ActivityOptionsCompat
+import androidx.core.os.LocaleListCompat
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.coroutineScope
 import androidx.work.CoroutineWorker
@@ -34,8 +36,12 @@ import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.launch
 import okio.IOException
 import org.json.JSONException
+import org.jsoup.internal.StringUtil.StringJoiner
 import org.koitharu.kotatsu.BuildConfig
+import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.utils.InternalResourceHelper
+import org.xmlpull.v1.XmlPullParser
+import org.xmlpull.v1.XmlPullParserException
 import kotlin.math.roundToLong
 
 val Context.activityManager: ActivityManager?
@@ -146,3 +152,23 @@ fun scaleUpActivityOptionsOf(view: View): ActivityOptions = ActivityOptions.make
 	view.width,
 	view.height,
 )
+
+fun Resources.getLocalesConfig(): LocaleListCompat {
+	val tagsList = StringJoiner(",")
+	try {
+		val xpp: XmlPullParser = getXml(R.xml.locales)
+		while (xpp.eventType != XmlPullParser.END_DOCUMENT) {
+			if (xpp.eventType == XmlPullParser.START_TAG) {
+				if (xpp.name == "locale") {
+					tagsList.add(xpp.getAttributeValue(0))
+				}
+			}
+			xpp.next()
+		}
+	} catch (e: XmlPullParserException) {
+		e.printStackTraceDebug()
+	} catch (e: IOException) {
+		e.printStackTraceDebug()
+	}
+	return LocaleListCompat.forLanguageTags(tagsList.complete())
+}

app/src/main/res/values/strings.xml

@@ -401,4 +401,5 @@
 	<string name="source_disabled">Source disabled</string>
 	<string name="prefetch_content">Content preloading</string>
 	<string name="mark_as_current">Mark as current</string>
+	<string name="language">Language</string>
 </resources>

app/src/main/res/xml/locales.xml

@@ -14,16 +14,16 @@
 	<locale android:name="in" />
 	<locale android:name="it" />
 	<locale android:name="ja" />
-	<locale android:name="nb-rNO" />
+	<locale android:name="nb-NO" />
 	<locale android:name="pl" />
 	<locale android:name="pt" />
-	<locale android:name="pt-rBR" />
+	<locale android:name="pt-BR" />
 	<locale android:name="ru" />
 	<locale android:name="si" />
 	<locale android:name="sr" />
 	<locale android:name="sv" />
 	<locale android:name="tr" />
 	<locale android:name="uk" />
-	<locale android:name="zh-rCN" />
+	<locale android:name="zh-CN" />
-	<locale android:name="zh-rTW" />
+	<locale android:name="zh-TW" />
 </locale-config>

app/src/main/res/xml/pref_appearance.xml

@@ -24,6 +24,10 @@
 		android:summary="@string/black_dark_theme_summary"
 		android:title="@string/black_dark_theme" />
 
+	<org.koitharu.kotatsu.settings.utils.ActivityListPreference
+		android:key="app_locale"
+		android:title="@string/language" />
+
 	<ListPreference
 		android:key="date_format"
 		android:title="@string/date_format" />
@@ -56,4 +60,4 @@
 		android:summary="@string/protect_application_summary"
 		android:title="@string/protect_application" />
 
-</PreferenceScreen>
+</PreferenceScreen>