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Launch system language picker for API 33+ (#3145)

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Phil Oliver 2025-09-19 08:16:45 -04:00 • committed by GitHub
parent 0d2c1f1516
commit e604942beb
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4 changed files with 61 additions and 48 deletions
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app/src/main/java/com/geeksville/mesh/util/LanguageUtils.kt
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@ -22,61 +22,59 @@ import androidx.appcompat.app.AppCompatDelegate
import androidx.core.os.LocaleListCompat
import com.geeksville.mesh.R
import com.geeksville.mesh.android.Logging
import com.geeksville.mesh.android.prefs.UiPrefs
import org.xmlpull.v1.XmlPullParser
import java.util.Locale
object LanguageUtils : Logging {
const val SYSTEM_DEFAULT = "zz"
const val SYSTEM_MANAGED = "appcompat"
fun getLocale(): String = AppCompatDelegate.getApplicationLocales().toLanguageTags().ifEmpty { SYSTEM_DEFAULT }
fun setLocale(lang: String) {
fun setAppLocale(languageTag: String) {
AppCompatDelegate.setApplicationLocales(
if (lang == SYSTEM_DEFAULT) {
if (languageTag == SYSTEM_DEFAULT) {
LocaleListCompat.getEmptyLocaleList()
} else {
LocaleListCompat.forLanguageTags(lang)
LocaleListCompat.forLanguageTags(languageTag)
},
)
}
fun migrateLanguagePrefs(uiPrefs: UiPrefs) {
val currentLang = uiPrefs.lang
debug("Migrating in-app language prefs: $currentLang")
uiPrefs.lang = SYSTEM_MANAGED
setLocale(currentLang)
}
/** Using locales_config.xml, maps language tags to their localized language names (e.g.: "en" -> "English") */
@Suppress("CyclomaticComplexMethod")
fun Context.getLanguageMap(): Map<String, String> {
val languageTags = buildList {
add(SYSTEM_DEFAULT)
/** Build a list from locales_config.xml of native language names paired to its Locale tag (ex: "English", "en") */
fun getLanguageTags(context: Context): Map<String, String> {
val languageTags = mutableListOf(SYSTEM_DEFAULT)
try {
context.resources.getXml(R.xml.locales_config).use {
while (it.eventType != XmlPullParser.END_DOCUMENT) {
if (it.eventType == XmlPullParser.START_TAG && it.name == "locale") {
it.getAttributeValue(0)?.let { tag -> languageTags += tag }
try {
resources.getXml(R.xml.locales_config).use { parser ->
while (parser.eventType != XmlPullParser.END_DOCUMENT) {
if (parser.eventType == XmlPullParser.START_TAG && parser.name == "locale") {
val languageTag =
parser.getAttributeValue("http://schemas.android.com/apk/res/android", "name")
languageTag?.let { add(it) }
}
parser.next()
}
it.next()
}
} catch (e: Exception) {
errormsg("Error parsing locale_config.xml: ${e.message}")
}
} catch (e: Exception) {
errormsg("Error parsing locale_config.xml ${e.message}")
}
return languageTags.associateBy { tag ->
val loc = Locale.forLanguageTag(tag)
when (tag) {
SYSTEM_DEFAULT -> context.getString(R.string.preferences_system_default)
"fr-HT" -> context.getString(R.string.fr_HT)
"pt-BR" -> context.getString(R.string.pt_BR)
"zh-CN" -> context.getString(R.string.zh_CN)
"zh-TW" -> context.getString(R.string.zh_TW)
else ->
loc.getDisplayLanguage(loc).replaceFirstChar {
if (it.isLowerCase()) it.titlecase(loc) else it.toString()
return languageTags.associateWith { languageTag ->
when (languageTag) {
SYSTEM_DEFAULT -> getString(R.string.preferences_system_default)
"fr-HT" -> getString(R.string.fr_HT)
"pt-BR" -> getString(R.string.pt_BR)
"zh-CN" -> getString(R.string.zh_CN)
"zh-TW" -> getString(R.string.zh_TW)
else -> {
Locale.forLanguageTag(languageTag).let { locale ->
locale.getDisplayLanguage(locale).replaceFirstChar { char ->
if (char.isLowerCase()) char.titlecase(locale) else char.toString()
}
}
}
}
}
}