Start working on change language

app/src/main/java/net/pokeranalytics/android/PokerAnalyticsApplication.kt

@@ -1,6 +1,7 @@
 package net.pokeranalytics.android
 
 import android.app.Application
+import android.content.Context
 import com.crashlytics.android.Crashlytics
 import io.fabric.sdk.android.Fabric
 import io.realm.Realm
@@ -69,6 +70,10 @@ class PokerAnalyticsApplication : Application() {
 		}
 	}
 
+	override fun attachBaseContext(base: Context?) {
+		super.attachBaseContext(base)
+	}
+
 	/**
 	 * Create fake sessions if we have less than 10 sessions
 	 */

app/src/main/java/net/pokeranalytics/android/ui/fragment/SettingsFragment.kt

@@ -20,6 +20,7 @@ import net.pokeranalytics.android.ui.adapter.StaticRowRepresentableDataSource
 import net.pokeranalytics.android.ui.fragment.components.PokerAnalyticsFragment
 import net.pokeranalytics.android.ui.view.RowRepresentable
 import net.pokeranalytics.android.ui.view.rowrepresentable.SettingRow
+import net.pokeranalytics.android.util.LocaleUtils
 import net.pokeranalytics.android.util.Preferences
 import net.pokeranalytics.android.util.URL
 import net.pokeranalytics.android.util.extensions.openContactMail
@@ -56,8 +57,8 @@ class SettingsFragment : PokerAnalyticsFragment(), RowRepresentableDelegate, Sta
 	override fun stringForRow(row: RowRepresentable): String {
 		return when (row) {
 			SettingRow.VERSION -> BuildConfig.VERSION_NAME + if (BuildConfig.DEBUG) " DEBUG" else ""
+			SettingRow.LANGUAGE -> LocaleUtils.getCurrentLocale(requireContext()).displayLanguage
 			SettingRow.CURRENCY -> Currency.getInstance(Preferences.getCurrencyLocale(this.parentActivity)).symbol
-
 			else -> ""
 		}
 	}
@@ -93,6 +94,10 @@ class SettingsFragment : PokerAnalyticsFragment(), RowRepresentableDelegate, Sta
 			SettingRow.RATE_APP -> parentActivity.openPlayStorePage()
 			SettingRow.CONTACT_US -> parentActivity.openContactMail(R.string.contact)
 			SettingRow.BUG_REPORT -> parentActivity.openContactMail(R.string.bug_report_subject)
+			SettingRow.LANGUAGE -> {
+				LocaleUtils.setLocale(requireContext(), "fr")
+				activity?.recreate()
+			}
 			SettingRow.CURRENCY -> CurrenciesActivity.newInstanceForResult(this@SettingsFragment, SettingsFragment.REQUEST_CODE_CURRENCY)
 			SettingRow.FOLLOW_US -> {
 				when (position) {

app/src/main/java/net/pokeranalytics/android/ui/view/rowrepresentable/SettingRow.kt

@@ -18,6 +18,7 @@ enum class SettingRow : RowRepresentable {
 	FOLLOW_US,
 
 	// Preferences
+	LANGUAGE,
 	CURRENCY,
 
 	// Data management
@@ -80,6 +81,7 @@ enum class SettingRow : RowRepresentable {
 					PRIVACY_POLICY -> R.string.privacy_policy
 					TERMS_OF_USE -> R.string.terms_of_use
 					FOLLOW_US -> R.string.follow_us
+					LANGUAGE -> R.string.language
 					CURRENCY -> R.string.currency
 					GDPR -> R.string.gdpr
 					else -> null
@@ -92,7 +94,7 @@ enum class SettingRow : RowRepresentable {
 		get() {
 			return when (this) {
 				VERSION -> RowViewType.TITLE_VALUE.ordinal
-				CURRENCY -> RowViewType.TITLE_VALUE_ARROW.ordinal
+				LANGUAGE, CURRENCY -> RowViewType.TITLE_VALUE_ARROW.ordinal
 				FOLLOW_US -> RowViewType.ROW_FOLLOW_US.ordinal
 				else -> RowViewType.TITLE_ARROW.ordinal
 			}

app/src/main/java/net/pokeranalytics/android/util/LocaleUtils.kt

@@ -0,0 +1,97 @@
+package net.pokeranalytics.android.util
+
+import android.annotation.TargetApi
+import android.content.Context
+import android.os.Build
+import android.preference.PreferenceManager
+import java.util.*
+
+
+
+class LocaleUtils {
+
+	companion object {
+
+		/**
+		 * Return the current locale
+		 */
+		fun getCurrentLocale(context: Context) : Locale {
+			val defaultLocaleCode = Preferences.getString(Preferences.Keys.LOCALE_CODE, context)
+			var locale = Locale.getDefault()
+			if (defaultLocaleCode != null) {
+				locale = Locale(defaultLocaleCode)
+				Locale.setDefault(locale)
+			}
+			return locale
+		}
+
+
+		private val SELECTED_LANGUAGE = "Locale.Helper.Selected.Language"
+
+		fun onAttach(context: Context): Context {
+			val lang = getPersistedData(context, Locale.getDefault().language)
+			return setLocale(context, lang)
+		}
+
+		fun onAttach(context: Context, defaultLanguage: String): Context {
+			val lang = getPersistedData(context, defaultLanguage)
+			return setLocale(context, lang)
+		}
+
+		fun getLanguage(context: Context): String? {
+			return getPersistedData(context, Locale.getDefault().language)
+		}
+
+		fun setLocale(context: Context, language: String?): Context {
+			persist(context, language)
+
+			return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+				updateResources(context, language)
+			} else updateResourcesLegacy(context, language)
+
+		}
+
+		private fun getPersistedData(context: Context, defaultLanguage: String): String? {
+			val preferences = PreferenceManager.getDefaultSharedPreferences(context)
+			return preferences.getString(SELECTED_LANGUAGE, defaultLanguage)
+		}
+
+		private fun persist(context: Context, language: String?) {
+			val preferences = PreferenceManager.getDefaultSharedPreferences(context)
+			val editor = preferences.edit()
+
+			editor.putString(SELECTED_LANGUAGE, language)
+			editor.apply()
+		}
+
+		@TargetApi(Build.VERSION_CODES.N)
+		private fun updateResources(context: Context, language: String?): Context {
+			val locale = Locale(language)
+			Locale.setDefault(locale)
+
+			val configuration = context.resources.configuration
+			configuration.setLocale(locale)
+			configuration.setLayoutDirection(locale)
+
+			return context.createConfigurationContext(configuration)
+		}
+
+		private fun updateResourcesLegacy(context: Context, language: String?): Context {
+			val locale = Locale(language)
+			Locale.setDefault(locale)
+
+			val resources = context.resources
+
+			val configuration = resources.configuration
+			configuration.locale = locale
+			configuration.setLayoutDirection(locale)
+
+			resources.updateConfiguration(configuration, resources.displayMetrics)
+
+			return context
+		}
+
+
+	}
+
+}

app/src/main/java/net/pokeranalytics/android/util/Preferences.kt

@@ -8,6 +8,7 @@ class Preferences {
 
     enum class Keys(var identifier: String) {
         CURRENCY_CODE("CurrencyCode"),
+        LOCALE_CODE("LocaleCode"),
         FIRST_LAUNCH("firstLaunch")
     }