android:descendantFocusability 焦点 父控件与子控件焦点
android:descendantFocusabilityDefines the relationship between the ViewGroup and its descendants when looking for a View to take focus.Must be one of the following constant values.
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android:descendantFocusability
Defines the relationship between the ViewGroup and its descendants when looking for a View to take focus.
Must be one of the following constant values.
| Constant | Value | Description |
|---|---|---|
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. |
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