ViewGroup屬性小結(jié)：

待改進(jìn)

屬性

1. android:addStatesFromChildren：Sets whether this ViewGroup's drawable states also include its children's drawable states.[booean]：定義父控件和子控件的狀態(tài)是否關(guān)聯(lián)。(子控件獲取焦點(diǎn)的時(shí)候，整個(gè)布局)

   例子：當(dāng)子控件獲取焦點(diǎn)的時(shí)候讓整個(gè)布局都獲取焦點(diǎn)。

2. android:alwaysDrawnWithCache ：Defines whether the ViewGroup should always draw its children using their drawing cache or not. [boolean] 默認(rèn)為true：定義是否要一直使用緩沖來繪制控件。

3. android:animateLayoutChanges：Defines whether changes in layout (caused by adding and removing items) should cause a LayoutTransition to run.[boolean]：定義布局改變時(shí)的動(dòng)畫。 設(shè)為true時(shí)會(huì)創(chuàng)建一個(gè)默認(rèn)的LayoutTransition對(duì)象和默認(rèn)的動(dòng)畫。

   方法

   • setLayoutTranstiton(LayoutTransition)

4. android:animationCache ：Defines whether layout animations should create a drawing cache for their children. [boolean]:定義父控件是否要為子控件創(chuàng)建繪制緩存。作用：優(yōu)化性能，但是會(huì)占用更多內(nèi)存

5. android:clipChildren：Defines whether a child is limited to draw inside of its bounds or not.[boolean]默認(rèn)是true:定義子控件是否要限制在父控件區(qū)域內(nèi)

   方法

   • setClipChildren(boolean)

6. android:clipToPadding：Defines whether the ViewGroup will clip its children and resize (but not clip) any EdgeEffect to its padding, if padding is not zero. [boolean]默認(rèn)true：定義父控件會(huì)不會(huì)限制子控件的大小并且適配邊緣的填充。

   方法

   • setClipToPadding(boolean)

7. android:descendantFocusability：Defines the relationship between the ViewGroup and its descendants when looking for a View to take focus.[enum]：定義父控件和子控件在獲取焦點(diǎn)時(shí)的關(guān)系

   屬性值

   • beforeDescendants:0,The ViewGroup will get focus before any of its descendants.
   • afterDescendants:1,The ViewGroup will get focus only if none of its descendants want it.
   • blocksDescendants:2,The ViewGroup will block its descendants from receiving focus.

8. android:layoutAnimation： Defines the layout animation to use the first time the ViewGroup is laid out.[reference] :定義布局控件在退出的時(shí)候的動(dòng)畫

9. android:layoutMode：Defines the layout mode of this ViewGroup. [enum]:定義布局的模式：

   屬性值

   • clipBounds:0,Use the children's clip bounds when laying out this container.
   • opticalBounds:1,Use the children's optical bounds when laying out this container.

   方法

   • setLayoutMode(int)

10. android:persistentDrawingCache：Defines the persistence of the drawing cache.[enum]:

    屬性值

    • none:0x0,The drawing cache is not persisted after use.
    • animation:0x1,The drawing cache is persisted after a layout animation.
    • scrolling:0x2,The drawing cache is persisted after a scroll.
    • all:0x3,The drawing cache is always persisted.

11. android:splitMotionEvents：Sets whether this ViewGroup should split MotionEvents to separate child views during touch event dispatch.[boolean] 默認(rèn)false :布局是否要將動(dòng)作事件分到子控件中。

    方法

    • setMotionEventSplittingEnabled(boolean)