Monday 20 September 2021

LocaleHelper for language change

 import android.content.Context;

import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.os.Build;
import android.os.LocaleList;
import android.preference.PreferenceManager;

import java.util.Locale;

public class LocaleHelper {

private static final String SELECTED_LANGUAGE = "Locale.Helper.Selected.Language";

public static String getLanguage(Context context) {
return getPersistedData(context, Locale.getDefault().getLanguage());
}

public static Context setNewLocale(Context mContext, String language) {
persist(mContext, language);
return updateLocale(mContext, getLanguage(mContext));
}

public static Context setLocale(Context context) {
persist(context, getLanguage(context));

return updateLocale(context, getLanguage(context));
}

private static String getPersistedData(Context context, String defaultLanguage) {
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
return preferences.getString(SELECTED_LANGUAGE, defaultLanguage);
}

private static void persist(Context context, String language) {
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
SharedPreferences.Editor editor = preferences.edit();

editor.putString(SELECTED_LANGUAGE, language);
editor.apply();
}


private static Context updateLocale(Context context, String lang) {
Resources resources = context.getResources();
Configuration configuration = resources.getConfiguration();

Locale localeToSwitchTo = new Locale(lang);

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {

configuration.setLocale(localeToSwitchTo);

LocaleList localeList = new LocaleList(localeToSwitchTo);
LocaleList.setDefault(localeList);
configuration.setLocales(localeList);
context = context.createConfigurationContext(configuration);

} else {

Locale.setDefault(localeToSwitchTo);
configuration.locale = localeToSwitchTo;
resources.updateConfiguration(configuration, resources.getDisplayMetrics());
}

return context;
}
}

//Activity class 
@Override
protected void attachBaseContext(Context base) {
super.attachBaseContext(LocaleHelper.setLocale(base));
}
private void setNewLocale(Context mContext, String language) {
try {
LocaleHelper.setNewLocale(this, language);
         recreate();
//recreate activity
} catch (Exception e) {
e.printStackTrace();
FirebaseCrashlytics.getInstance().recordException(e);
}

}