Visit: http://www.anandsingh.net/2015/10/and... to download project source code.
In this video tutorial, I will teach you, How to Store data in internal storage of android device.
In this tutorial i have created a simple Expense Calculator Application. In this application you can enter your expense and calculate it. So, after calculating Expense you can save it to device internal storage. Now, whenever you will open your application, you will see your previous expense.