Android自定义组件

http://developer.android.com/guide/topics/ui/custom-components.html

 

下面的表格给出了实现一个具体View要重写的方法。

Creation	Constructors	There is a form of the constructor that are called when the view is created from code and a form that is called when the view is inflated from a layout file. The second form should parse and apply any attributes defined in the layout file.
onFinishInflate()	Called after a view and all of its children has been inflated from XML.
Layout	onMeasure(int, int)	Called to determine the size requirements for this view and all of its children.
onLayout(boolean, int, int, int, int)	Called when this view should assign a size and position to all of its children.
onSizeChanged(int, int, int, int)	Called when the size of this view has changed.
Drawing	onDraw(Canvas)	Called when the view should render its content.
Event processing	onKeyDown(int, KeyEvent)	Called when a new key event occurs.
onKeyUp(int, KeyEvent)	Called when a key up event occurs.
onTrackballEvent(MotionEvent)	Called when a trackball motion event occurs.
onTouchEvent(MotionEvent)	Called when a touch screen motion event occurs.
Focus	onFocusChanged(boolean, int, Rect)	Called when the view gains or loses focus.
onWindowFocusChanged(boolean)	Called when the window containing the view gains or loses focus.
Attaching	onAttachedToWindow()	Called when the view is attached to a window.
onDetachedFromWindow()	Called when the view is detached from its window.
onWindowVisibilityChanged(int)	Called when the visibility of the window containing the view has changed.