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Added in API level 1

Summary: Methods | [Expand All]

public static interface ViewGroup.OnHierarchyChangeListener

android.view.ViewGroup.OnHierarchyChangeListener

Known Indirect Subclasses

WebView

在此视图中的层次结构发生变化时调用回调的接口定义。无论何时将小孩添加到此视图或从中移除，层次结构都会更改。

Public methods
`abstract void`	`onChildViewAdded(View parent, View child)` 当新的孩子被添加到父视图时调用。
`abstract void`	`onChildViewRemoved(View parent, View child)` 当孩子从父视图中移除时调用。

Added in API level 1

void onChildViewAdded (View parent, 
                View child)

当新的孩子被添加到父视图时调用。

Parameters
`parent`	`View`: the view in which a child was added
`child`	`View`: the new child view added in the hierarchy

Added in API level 1

void onChildViewRemoved (View parent, 
                View child)

当孩子从父视图中移除时调用。

Parameters
`parent`	`View`: the view from which the child was removed
`child`	`View`: the child removed from the hierarchy