1 files changed, 56 insertions, 0 deletions
diff --git a/android/source/src/java/org/libreoffice/LocaleHelper.java b/android/source/src/java/org/libreoffice/LocaleHelper.java
new file mode 100644
index 000000000000..26a31e431397
--- /dev/null
+++ b/android/source/src/java/org/libreoffice/LocaleHelper.java
@@ -0,0 +1,56 @@
+package org.libreoffice;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.os.Build;
+import android.preference.PreferenceManager;
+
+import java.util.Locale;
+
+public class LocaleHelper {
+
+    private static final String SELECTED_LANG = "org.libreoffice.selected.lang";
+
+    public static Context onAttach(Context context){
+        String lang = getPersistedData(context, Locale.getDefault().getLanguage());
+        return setLocale(context, lang);
+    }
+
+    public static Context onAttach(Context context, String defLang){
+        String lang = getPersistedData(context, defLang);
+        return setLocale(context, lang);
+    }
+
+    public static Context setLocale(Context context, String lang) {
+        persist(context, lang);
+        return updateResources(context, lang);
+    }
+
+    @SuppressWarnings("deprecation")
+    private static Context updateResources(Context context, String lang) {
+        Locale locale = new Locale(lang);
+        Locale.setDefault(locale);
+
+        Resources res = context.getResources();
+        Configuration cfg = res.getConfiguration();
+        cfg.locale = locale;
+        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1)
+            cfg.setLayoutDirection(locale);
+
+        res.updateConfiguration(cfg, res.getDisplayMetrics());
+        return context;
+    }
+
+    private static void persist(Context context, String lang) {
+        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
+        preferences.edit().putString(SELECTED_LANG, lang);
+        preferences.edit().apply();
+    }
+
+    private static String getPersistedData(Context context, String lang) {
+        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
+        return preferences.getString(SELECTED_LANG, lang);
+    }
+}