The baselinealigned and Layout_weight in LinearLayout

The baselinealigned in LinearLayout must be a horizontal layout horizontal, and when you do not set it, the default is true, which means that the first line of text in the child control is aligned

and layout_weight specific gravity, in the horizontal layout, first put so all layout_weight to get rid of, and then the rest of the screen width in proportion, and then each with their own layout_weight width plus the use of proportional division to get the width, This is the crazy reading of the child controls, and the vertical layout is the same