Android, NSUserDefaults가 그립다

import android.content.Context;

import android.content.SharedPreferences;

public class UserDefaults {

SharedPreferences preferences;

  public static UserDefaults getInstance(Context context){

    UserDefaults instance = new UserDefaults();

    instance.preferences = context.getSharedPreferences("MyPreferences", Context.MODE_PRIVATE);

    return instance;

  }

  public void setString(String key, String value){

    SharedPreferences.Editor editor = preferences.edit();

    editor.putString(key, value);

    editor.commit();

  }

  public String getString(String key){

    return preferences.getString(key,"");

  }

}