Localization with resources in Android

Currency currency = Currency.getInstance("USD");
NumberFormat format = NumberFormat.getCurrencyInstance();
format.setCurrency(currency);
format.format(10.00);

<resources>
    <string name="app_name">Testing Application</string>
    <string name="hello">Hello World</string>
</resources>

<resources>
    <string name="app_name">परीक्षण आवेदन</string>
    <string name="hello">नमस्ते दुनिया</string>
</resources>

public void setLocale(String locale) // Pass "en","hi", etc.
{
    myLocale = new Locale(locale);
    // Saving selected locale to session - SharedPreferences.
    saveLocale(locale);
    // Changing locale.
    Locale.setDefault(myLocale);
    android.content.res.Configuration config = new android.content.res.Configuration();
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
        config.setLocale(myLocale);
    } else {
        config.locale = myLocale;
    }
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
        getBaseContext().createConfigurationContext(config);
    } else {
        getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
    }
}

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" 
    android:text="@string/app_name"/>
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" 
    android:text="@string/hello"/>

import android.app.Application;
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 android.view.ContextThemeWrapper;

import java.util.Locale;

/**
 * Created by Umesh on 10/10/16.
 */
public class LocaleUtils {

    private static Locale mLocale;

    public static void setLocale(Locale locale){
        mLocale = locale;
        if(mLocale != null){
            Locale.setDefault(mLocale);
        }
    }

    public static void updateConfiguration(ContextThemeWrapper wrapper){
        if(mLocale != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1){
            Configuration configuration = new Configuration();
            configuration.setLocale(mLocale);
            wrapper.applyOverrideConfiguration(configuration);
        }
    }

    public static void updateConfiguration(Application application, Configuration configuration){
        if(mLocale != null && Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1){
            Configuration config = new Configuration(configuration);
            config.locale = mLocale;
            Resources res = application.getBaseContext().getResources();
            res.updateConfiguration(configuration, res.getDisplayMetrics());
        }
    }

    public static void updateConfiguration(Context context, String language, String country){
        Locale locale = new Locale(language,country);
        setLocale(locale);
        if(mLocale != null){
            Resources res = context.getResources();
            Configuration configuration = res.getConfiguration();
            configuration.locale = mLocale;
            res.updateConfiguration(configuration,res.getDisplayMetrics());
        }
    }




    public static String getPrefLangCode(Context context) {
        return PreferenceManager.getDefaultSharedPreferences(context).getString("lang_code","en");
    }

    public static void setPrefLangCode(Context context, String mPrefLangCode) {

        SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(context).edit();
        editor.putString("lang_code",mPrefLangCode);
        editor.commit();
    }

    public static  String getPrefCountryCode(Context context) {
        return PreferenceManager.getDefaultSharedPreferences(context).getString("country_code","US");
    }

    public static void setPrefCountryCode(Context context,String mPrefCountryCode) {

        SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(context).edit();
        editor.putString("country_code",mPrefCountryCode);
        editor.commit();
    }
}

public class LocaleApp extends Application{

    @Override
    public void onCreate() {
        super.onCreate();

        LocaleUtils.setLocale(new Locale(LocaleUtils.getPrefLangCode(this), LocaleUtils.getPrefCountryCode(this)));
        LocaleUtils.updateConfiguration(this, getResources().getConfiguration());
    }
}

public abstract class LocalizationActivity extends AppCompatActivity {

    public LocalizationActivity() {
        LocaleUtils.updateConfiguration(this);
    }

    // We only override onCreate
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

}

public class MainActivity extends LocalizationActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

    }
}

<string name="developer" translatable="false">Developer Name</string>

<?xml version="1.0" encoding="utf-8"?>
<resources
  xmlns:tools="https://schemas.android.com/tools"
  tools:ignore="MissingTranslation" >
https://stackoverflow.com/documentation/android/3345/localization-with-resources-in-android#
  <!-- your strings here; no need now for the translatable attribute -->

</resources>

<resources
xmlns:tools="https://schemas.android.com/tools"
    tools:locale="en" tools:ignore="MissingTranslation">

lintOptions {
        
        disable 'MissingTranslation'
    }