Android – change device system locale programmatically

Yes you can change device locale for any android version make sure that your app is system app.Heres the code to help you out.Please rate my answer if you like it.

//getting the languages that are shown same as in our device settings
     String[] systemLocaleIetfLanguageTags = getAssets().getLocales();
            Arrays.sort(systemLocaleIetfLanguageTags);
            this.locale_data = new ArrayList();
            for (String ietfLanguageTag : systemLocaleIetfLanguageTags)
            {
                if (ietfLanguageTag != null && ietfLanguageTag.length() == 5)
                {
                    this.locale_data.add(new Loc(ietfLanguageTag));
                }
            }
            adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, android.R.id.text1, locale_data);
            // Assign adapter to ListView
            lv.setAdapter(adapter);
            lv.setOnItemClickListener(new OnItemClickListener()
            {
                @Override
                public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3)
                {
                    int itemPosition = position;
                    Loc loc = (Loc) ChangeLanguage.this.adapter.getItem(position);
                    Toast.makeText(ChangeLanguage.this, "language activated successfully !!", 0).show();
                    ChangeLanguage.change_setting(loc.getLocale());
                }
            });
        }
    //to change the locale
        public static void change_setting(Locale loc)
        {
            try
            {
                Class<?> activityManagerNative = Class.forName("android.app.ActivityManagerNative");
                Object am = activityManagerNative.getMethod("getDefault", new Class[0]).invoke(activityManagerNative, new Object[0]);
                Object config = am.getClass().getMethod("getConfiguration", new Class[0]).invoke(am, new Object[0]);
                config.getClass().getDeclaredField("locale").set(config, loc);
                config.getClass().getDeclaredField("userSetLocale").setBoolean(config, true);
                am.getClass().getMethod("updateConfiguration", new Class[] { Configuration.class }).invoke(am, new Object[] { config });
            }
            catch (Exception e)
            {
                e.printStackTrace();
            }
        }