Warning shows when i use Hash Map In android(Use new SparseArray)

Question

I am new to developing in android. In my android app I\'m using HashMap, but I\'m getting a warning:

**\"Use new SparseArray(...) ins         


        

Answer 1

SparseArray is used when you are using an Integer as a key.

When using the SparseArray, the key will stay as a primitive variable at all times unlike when you use the HashMap where it is required to have a Object as a key which will cause the int to become an Integer object just for a short time while getting the object in the map.

By using the SparseArray you will save the Garbage Collector some work.

So use just like a Map.