a quick Context wraper to change locale of android app in runtime, supporting changes in direction (RTL <-> LTR)

LocaleHelper.java

package com.mu.tools;

import android.annotation.TargetApi;
import android.content.Context;
import android.content.ContextWrapper;
import android.content.res.Configuration;
import android.os.Build;

import java.util.Locale;

/**
 * Created by Muhammad on 07/01/2017.
 * Main idea came from http://stackoverflow.com/questions/40221711/android-context-getresources-updateconfiguration-deprecated/40704077#40704077
 */

public class LocaleHelper extends ContextWrapper {

    public LocaleHelper(Context base) {
        super(base);
    }

    @SuppressWarnings("deprecation")
    public static ContextWrapper wrap(Context context, String language) {
        Configuration config = context.getResources().getConfiguration();
        if (!language.equals("")) {
            Locale locale = new Locale(language);
            Locale.setDefault(locale);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                setSystemLocale(config, locale);
            } else {
                setSystemLocaleLegacy(config, locale);
            }
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
                config.setLayoutDirection(locale);
                context = context.createConfigurationContext(config);
            } else {
                context.getResources().updateConfiguration(config, context.getResources().getDisplayMetrics());
            }
        }
        return new LocaleHelper(context);
    }

    @SuppressWarnings("deprecation")
    public static Locale getSystemLocaleLegacy(Configuration config){
        return config.locale;
    }

    @TargetApi(Build.VERSION_CODES.N)
    public static Locale getSystemLocale(Configuration config){
        return config.getLocales().get(0);
    }

    @SuppressWarnings("deprecation")
    public static void setSystemLocaleLegacy(Configuration config, Locale locale){
        config.locale = locale;
    }

    @TargetApi(Build.VERSION_CODES.N)
    public static void setSystemLocale(Configuration config, Locale locale){
        config.setLocale(locale);
    }
}

Hi,
Thanks for the solution.
How do you store chosen language?
It's not possible to use SharedPreferences in attachBaseContext method.

I know it is late to reply, but this might help someone else looking for the same.
Let say you have a DialogInterface menu from which you choose the languages.
@Override public void onClick(DialogInterface dialog, int which) { SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(Your_Context); SharedPreferences.Editor editor = sharedPreferences.edit(); switch (which) { case 0: editor.putString("language","en");; break; case 1: editor.putString("language","fr"); break; case 2: editor.putString("language","fa"); break; default: editor.putString("language","en"); } editor.commit(); recreate(); dialog.dismiss(); }
and then while calling the @Override protected void attachBaseContext(Context newBase) { SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(newBase); String lang = sharedPreferences.getString("language", "en"); super.attachBaseContext(MyContextWrapper.wrap(newBase,lang)); }

any jetpack compose version ?