in the following code why the appearance of the radio button changes when i set
android:layout_width=\"fill_parent\"
and
android:width is for setting an exact number of pixels.
android:layout_width can be a dimension, as above, or it can be one of fill_parent, match_parent, or wrap_content.
fill_parent
match_parent
wrap_content
It is an error to use something other than a dimension for android:width.
android:width