GridView problem with resizing

I have a gridview with a button adapter based on this tutorial. The开发者_运维知识库 problem: When sliding up or down, right or left on the gridview, button resize for some reason. e.g from 85*85 px it get's to 100+ on 100+ and when moving finger back it get's to default. I don't really know why this is happening, ive searched alot and didnt find anything. Am I only one who has this bug? I tested it on a real phone too - same.

I would change attributes of GridView and only restrict Button height and see how it behaves

<GridView 
  android:id="@+id/gridview"
  android:layout_width="wrap_content" 
  android:layout_height="wrap_content"
  android:numColumns="3"
  android:stretchMode="columnWidth"
  android:verticalSpacing="5dp"
  android:horizontalSpacing="5dp"
/>