Provide support for Android SDK 23 as well

build-logic/android-library/src/main/kotlin/AndroidLibraryBasePlugin.kt

@@ -18,7 +18,7 @@ class AndroidLibraryBasePlugin: Plugin<Project> {
                 namespace = "de.sipgate.${target.name.replace("-", ".")}"
                 compileSdk = 34
 
-                defaultConfig.minSdk = 24
+                defaultConfig.minSdk = 23
             }
 
             setJdkVersion(JavaVersion.VERSION_1_8)

dachlatten-android/src/main/kotlin/de/sipgate/dachlatten/android/activity/ContextExt.kt

@@ -3,7 +3,10 @@ package de.sipgate.dachlatten.android.activity
 import android.app.Activity
 import android.content.Context
 import android.content.ContextWrapper
+import android.content.res.Configuration
+import android.os.Build
 import androidx.activity.ComponentActivity
+import java.util.Locale
 
 fun Context.getActivity(): Activity? =
     when (this) {
@@ -12,5 +15,15 @@ fun Context.getActivity(): Activity? =
         else -> null
     }
 
-val Context.languageTag: String
-    get() = resources.configuration.locales[0].toLanguageTag() ?: "en-GB"
+const val DEFAULT_LANGUAGE = "en"
+
+val Context.language: String
+    get() = resources.configuration.primaryLocale.language ?: DEFAULT_LANGUAGE
+
+val Configuration.primaryLocale: Locale
+    get() = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+        locales[0]
+    } else {
+        @Suppress("DEPRECATION")
+        locale
+    }

dachlatten-android/src/main/kotlin/de/sipgate/dachlatten/android/connectivity/ConnectionStateFlow.kt

@@ -3,6 +3,8 @@ package de.sipgate.dachlatten.android.connectivity
 import android.Manifest.permission.ACCESS_NETWORK_STATE
 import android.net.ConnectivityManager
 import android.net.Network
+import android.os.Build
+import androidx.annotation.RequiresApi
 import androidx.annotation.RequiresPermission
 import kotlinx.coroutines.channels.awaitClose
 import kotlinx.coroutines.flow.Flow
@@ -12,14 +14,17 @@ import kotlinx.coroutines.flow.onStart
 
 @get:RequiresPermission(ACCESS_NETWORK_STATE)
 val ConnectivityManager.isOffline: Flow<Boolean>
+    @RequiresApi(Build.VERSION_CODES.N)
     get() = observeConnectivityAsFlow()
         .map { it == ConnectionState.Unavailable }
 
 @get:RequiresPermission(ACCESS_NETWORK_STATE)
 val ConnectivityManager.isOnline: Flow<Boolean>
+    @RequiresApi(Build.VERSION_CODES.N)
     get() = observeConnectivityAsFlow()
         .map { it == ConnectionState.Available }
 
+@RequiresApi(Build.VERSION_CODES.N)
 @RequiresPermission(ACCESS_NETWORK_STATE)
 private fun ConnectivityManager.observeConnectivityAsFlow() = callbackFlow {
         val callback = object : ConnectivityManager.NetworkCallback() {

dachlatten-compose/src/main/kotlin/de/sipgate/dachlatten/compose/ContextExt.kt

@@ -0,0 +1,20 @@
+package de.sipgate.dachlatten.compose
+
+import android.content.Context
+import android.content.res.Configuration
+import android.os.Build
+import java.util.Locale
+
+
+const val DEFAULT_LANGUAGE = "en"
+
+val Context.language: String
+    get() = resources.configuration.primaryLocale.language ?: DEFAULT_LANGUAGE
+
+val Configuration.primaryLocale: Locale
+    get() = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+        locales[0]
+    } else {
+        @Suppress("DEPRECATION")
+        locale
+    }

dachlatten-compose/src/main/kotlin/de/sipgate/dachlatten/compose/text/UiText.kt

@@ -1,12 +1,13 @@
 package de.sipgate.dachlatten.compose.text
 
+import android.content.res.Configuration
 import android.content.res.Resources
-import android.os.LocaleList
+import android.os.Build
 import androidx.annotation.StringRes
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.platform.LocalConfiguration
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.text.toUpperCase
+import java.util.Locale
 
 sealed interface UiText {
     data class DynamicString(val value: String) : UiText
@@ -31,18 +32,27 @@ sealed interface UiText {
             vararg args: Any,
         ) : this(language, fallbackResource, args.asList())
 
-        fun LocaleList.getStringForLocales(): String? {
-            val locale = getFirstMatch(language.keys.toTypedArray())
+        fun Configuration.getStringForLocales(): String? {
+            val locale = resolveLocale(language.keys)
             return language[locale?.language?.uppercase()]
         }
+
+        private fun Configuration.resolveLocale(supportedLanguages: Set<String>): Locale? {
+            return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                locales.getFirstMatch(supportedLanguages.toTypedArray())
+            } else {
+                @Suppress("DEPRECATION")
+                locale
+            }
+        }
     }
 
     fun asString(resources: Resources) = when (this) {
         is DynamicString -> value
         is StringResource -> resources.getString(resId, *(args.toTypedArray()))
         is MultiLangString -> {
             val arguments = args.toTypedArray()
-            resources.configuration.locales.getStringForLocales()?.format(*arguments)
+            resources.configuration.getStringForLocales()?.format(*arguments)
                 ?: fallbackResource?.let { resources.getString(it, *arguments) }
                 ?: throw Resources.NotFoundException("Could not find multilang string")
         }
@@ -54,7 +64,7 @@ sealed interface UiText {
             is StringResource -> stringResource(id = resId, formatArgs = args.toTypedArray())
             is MultiLangString -> {
                 val arguments = args.toTypedArray()
-                LocalConfiguration.current.locales.getStringForLocales()?.format(*arguments)
+                LocalConfiguration.current.getStringForLocales() ?.format(*arguments)
                     ?: fallbackResource?.let { stringResource(id = it, formatArgs = arguments) }
                     ?: throw Resources.NotFoundException("Could not find multilang string")
             }