import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Spinner;
import android.widget.Toast;

import java.util.Locale;


public class MySettings extends Activity  {
    private Spinner spinnerctrl;
    private Locale myLocale;
    String lang;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        loadLocale();

        setContentView(R.layout.activity_my_settings);
        spinnerctrl = (Spinner) findViewById(R.id.spinner);
        spinnerctrl.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                if (position == 1) {
                    lang = "ru";
                    setLocale(lang);
                } else if (position == 2) {
                    lang = "en";
                    setLocale(lang);
                } else {
                    Toast.makeText(MySettings.this, "Choose language", Toast.LENGTH_SHORT).show();
                }


            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {


            }
        });

    }

        public void setLocale(String lang) {

            myLocale = new Locale(lang);
            saveLocale(lang);
            Locale.setDefault(myLocale);
            android.content.res.Configuration config = new android.content.res.Configuration();
            config.locale = myLocale;
            getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());

        }

    public void saveLocale(String lang)
    {
        if (lang.equalsIgnoreCase(""))
            return;
        String langPref = "Language";
        SharedPreferences prefs = getSharedPreferences("CommonPrefs", Activity.MODE_PRIVATE);
        SharedPreferences.Editor editor = prefs.edit();
        editor.putString(langPref, lang);
        editor.apply();
    }

    public void saveSettings(View view) {


        saveLocale(lang);
        Intent intent = new Intent(getApplicationContext(), MySettings.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(intent);
        System.exit(1);

    }

    public void loadLocale()
    {
        String langPref = "Language";
        SharedPreferences prefs = getSharedPreferences("CommonPrefs", Activity.MODE_PRIVATE);
        String language = prefs.getString(langPref, "");
        setLocale(language);
    }

}