Yesterday, I completed the topic but I was not sure in it. So today, I practiced by creating a app that collects info and stores in the local memory.
This app has four functionalities save, display, edit and delete a particular record. For storing, we use the SQLite database which is pre-installed in the android studio.
For edit and delete methods, i have manually set the index on which record has to be deleted or updated.
Chandru's blog 