View Groups
Frame layout:view in frame layout go to left up connear,one can cover another on,so always put on view inside
Linear layout:has layput weight
view Group also is a view,so,alyout is a view too
the tree:
↳
| |||
↳
| |||
↳
|
android.widget.LinearLayout
| ||
Height and Weight:
Gravity
Padding and Margin
Visibility
