how to set image width height based on screen size in gridview

Question

I want to show 3x3 sized gridview. I want to set the height and width based on device size. I am taking reference from this link.

MainActivity-

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Answer 1

I use the following approach when I have to resize my Activitys, I assume the same is valid for your case:

// I'm storing the size of the window in the display var, so I can then play around
final Display display = getWindowManager().getDefaultDisplay();
final Point size = new Point();
display.getSize(size);

// In your case, you'll probably need something like this:
GridView gv = (GridView) findViewById(R.id.gridview);
gv.setWidth((int) size.x * 0.75);    // Whis would resize the grid width to the 75%
gv.setHeight((int) size.y * 0.5);    // Same with the height, but to the 50%