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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";
// value for language that indicates that system's default language should be used
public static final String SYSTEM_DEFAULT_LANGUAGE = "SYSTEM_DEFAULT_LANGUAGE";
public static Context onAttach(Context context){
String lang = getPersistedData(context, Locale.getDefault().getLanguage());
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;
if (lang.equals(SYSTEM_DEFAULT_LANGUAGE)) {
locale = Locale.getDefault();
} else {
locale = new Locale(lang);
}
Locale.setDefault(locale);
Resources res = context.getResources();
Configuration cfg = res.getConfiguration();
cfg.locale = locale;
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);
}
}
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