Defining your own preferences manager

To achieve the mission from the beginning of this chapter, we will create a proper mechanism to obtaining shared preferences.

Create a new package called preferences. We will put all preferences related code in that package. For shared preferences management, we will need the following three classes:

• PreferencesProviderAbstract: This is basic abstraction to provide access to SharedPreferences
• PreferencesProvider: This is a PreferencesProviderAbstract implementation
• PreferencesConfiguration: This class is responsible for describing preferences we try to instantiate

Benefit of using this approach is a unified approach to shared preferences access in our application.

Let's define each class as follows:

• The PreferencesProviderAbstract class code is as follows:

         package com.journaler.perferences 
 
         import android.content...