Fifth layout:
Layout structures can be nested layout structure, responsible for the complete design control
1. abslayout absolute layout: Used to describe the controls on the screen coordinates of (x, y) is the upper left corner (0,0)
2. Relative layout: determined according to a relative positional relationship of each sub-elements, often with the use of a linear layout,
3. Frame layout: default in the upper left corner, the follow-up control will cover the front of the control, not commonly used
4. Linearity control: horizontal or vertical direction in accordance with the order of priority control
android: orientation = "vertical" arrangement in the vertical direction
android: orientation = "horizontal" are arranged in the horizontal direction
Weight: horizontal or vertical direction are arranged to control scale
android:layout_weight=”<num>” num数字
5. Table layout: the same used in the high data required table displayed
<TableRow> representative line controls therein are arranged in a row
Android in the unit:
dp: control automatically resize according to screen resolution
Set control text size: sp
match_parent: Before both space and single parent controls the size of the
wrap_content: automatically resize the control based on the content space