Why would layout_width=“wrap_content” take up the entire width of the screen?

Question

With this xml:

Answer 1

Your problem is that the width specification in your xml is ignored. From the docs for TableRow:

The children of a TableRow do not need to specify the layout_width and layout_height attributes in the XML file. TableRow always enforces those values to be respectively MATCH_PARENT and WRAP_CONTENT.

P.S. Did you have a compelling reason to use absolute pixels? That's generally considered bad practice.

P.P.S. Double-posting my answer to go with the double-posting of your question. :)