本文介绍了Android中布局参数（LayoutParams）的基本概念及使用方法。详细解释了LayoutParams如何帮助控件确定其大小与位置，并介绍了FILL_PARENT（现为MATCH_PARENT）、WRAP_CONTENT及具体数值等尺寸设定选项。此外还提到了不同ViewGroup子类对应的LayoutParams子类。
LayoutParams are used by views to tell their parents how they want to be laid out. (LayoutPrarms 用于表示控件想要在其父控件中摆放位置。)
See ViewGroup Layout Attributes for a list of all child view attributes that this class supports.
(1)The base LayoutParams class just describes how big the view wants to be for both width and height.
For each dimension, it can specify one of:
- FILL_PARENT (renamed MATCH_PARENT in API Level 8 and higher), which means that the view wants to be as big as its parent (minus padding)
- WRAP_CONTENT, which means that the view wants to be just big enough to enclose its content (plus padding)
- an exact number
(2)There are subclasses of LayoutParams for different subclasses of ViewGroup.
For example, AbsoluteLayout has its own subclass of LayoutParams which adds an X and Y value.
From:https://developer.android.com/reference/android/view/ViewGroup.LayoutParams.html
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