Fix warning 1.5: String.capitalize is now deprecated

vector/src/main/java/im/vector/app/core/utils/StringUtils.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2021 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.app.core.utils
+
+import java.util.Locale
+
+// String.capitalize is now deprecated
+fun String.safeCapitalize(locale: Locale): String {
+    return replaceFirstChar { char ->
+        if (char.isLowerCase()) {
+            char.titlecase(locale)
+        } else {
+            char.toString()
+        }
+    }
+}

vector/src/main/java/im/vector/app/features/settings/locale/LocalePickerController.kt

@@ -24,6 +24,7 @@ import im.vector.app.core.epoxy.loadingItem
 import im.vector.app.core.epoxy.noResultItem
 import im.vector.app.core.epoxy.profiles.profileSectionItem
 import im.vector.app.core.resources.StringProvider
+import im.vector.app.core.utils.safeCapitalize
 import im.vector.app.features.settings.VectorLocale
 import im.vector.app.features.settings.VectorPreferences
 import java.util.Locale
@@ -46,7 +47,7 @@ class LocalePickerController @Inject constructor(
         }
         localeItem {
             id(data.currentLocale.toString())
-            title(VectorLocale.localeToLocalisedString(data.currentLocale).capitalize(data.currentLocale))
+            title(VectorLocale.localeToLocalisedString(data.currentLocale).safeCapitalize(data.currentLocale))
             if (vectorPreferences.developerMode()) {
                 subtitle(VectorLocale.localeToLocalisedStringInfo(data.currentLocale))
             }
@@ -75,7 +76,7 @@ class LocalePickerController @Inject constructor(
                             .forEach {
                                 localeItem {
                                     id(it.toString())
-                                    title(VectorLocale.localeToLocalisedString(it).capitalize(it))
+                                    title(VectorLocale.localeToLocalisedString(it).safeCapitalize(it))
                                     if (vectorPreferences.developerMode()) {
                                         subtitle(VectorLocale.localeToLocalisedStringInfo(it))
                                     }