For this project you'll use inheritance to store multiple different classes and objects in the same data structure and display them in a single recyclerview.
For this assignment you are welcome to use the Master Detail Flow activity to start with. It will take a bit to work out where all the code is, but it will save a lot of boilerplate code.
- Build a parent class called
ShoppingItem - Give the class at least the following attributes an
intfor a color id and aStringfor the product name
Each class will have a unique color value for the color id int field, this will be used to visually distinguish each different class in your recyclerview The class's constructor should be protected
- Write a method for the class called getDisplayName which will return a
Stringin this case, just the product name
Subclasses will override this method and put their own spin on this method
- Write at least 3 subclasses for this class. These should be different categories of items you'd purchase, like grocery items, clothing, etc... Each of the classes should have a constant value for the color resource id. In the class constructor, pass this constant up to the super constructor. These should all contain at least one unique data member
- Override the getDisplayName method to make a unique twist on the display name ie size of the clothing item, or whether or not the grocery item must be refrigerated
- Write a method in your main activity to generate test values and add them to a List
- Build a
RecyclerViewto display the items in the new list.
Set the background color of each item in the view to the color id stored in the object