Why the same image put in the “drawable-hdpi” directory shows different if I put it into the “drawable” directory

Question

I have encountered a thing that I am not really able to understand.

In my application I use an image (64x64 px).

Now, ON THE SAME DEVICE (Samsung Galaxy ACE, Gingerbread):

• If i put the above mentioned image in the "drawable-hdpi" directory it shows on the screen in a certain size;
• If i put THE SAME IMAGE in the "drawable" directory it shows in a different size , to be precise it shows BIGGER .

I really do not understand this!!

It is the same image on the same device !!!

Please is anybody able to explain to me this inexplicable behavior?

Thanks a lot to anybody so kind to clarify this to me.

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EDIT EDIT EDIT EDIT EDIT EDIT

See the screens. The image in question is the background of each cell in the GridView

In the "drawable-hdpi" directory:

In the "drawable" directory

Answer 1

Android scales your image while keeping the aspect ratio. you can read more about it here and you can also put the file in drawable-nodpi as @Nobu said.