Size of a Hello World android app

Question

I am new to android and when I create a simple Hello World app its size is about 900 KB. But I have seen many apps on play store like Chain Reaction having size of only 200 KB. Do the default Hello World app contains some resources that I don't need? How to remove them? Any Help will be appreciated. Thanks in advance.

Answer 1

There're some ways to reduce the size of the output APK file:

• Make sure there's no unused resources. You can check it using Android Lint Inspection. Just press Control + Alt + Shift + i and type "Unused resources" (without quotes). If there's unused resources, you can delete it manually.

• Use ProGuard see here.

• You can also combine ProGuard with Resource Shrinking. See here