Why Layout Appears Different In Devices?

I am not sure why the views are different but not stable.

Holo - Theme_Holo_NoTitleBar

You must call it before:

setContentView(...);

Or add this to your manifest:

android:theme="@android:style/Theme.Holo.NoActionBar.Fullscreen"

You can remove NoActionBar, and Fullscreen, to get different things. Also you can add stuff. If you do it with code, there is autocomplete and you can see all themes and options.

Hope this helps.

Solution 2:

The first one uses the holo theme. The second devices uses the pre holo theme.

Solution 3:

Just use your custom theme, so you can have a "standard" theme across any Android version. http://developer.android.com/guide/topics/ui/themes.html