Android - Saving Key-Value Sets

//        http://developer.android.com/training/basics/data-storage/shared-preferences.html



package com.example.test;

import android.annotation.TargetApi;
import android.app.Activity;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.EditText;

public class NastavToken extends Activity {
    private String token = "";

    public void ulozToken() {
        EditText editText = (EditText) findViewById(R.id.edit_token);
        token = editText.getText().toString();
        getPreferences(MODE_PRIVATE).edit().putString("token", token).commit();
    }

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

        SharedPreferences settings = getSharedPreferences("Test", Context.MODE_PRIVATE);
        token = getPreferences(MODE_PRIVATE).getString("token", "");

        setupActionBar();
    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    private void setupActionBar() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
            getActionBar().setDisplayHomeAsUpEnabled(true);
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.nastav_token, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case android.R.id.home:
            NavUtils.navigateUpFromSameTask(this);
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}