抽屉控件 SlidingDrawer相关知识点

【0】先看一段官方描述：

public class

SlidingDrawer

extends  ViewGroup

java.lang.Object
↳	android.view.View
	↳	android.view.ViewGroup
		↳	android.widget.SlidingDrawer

Class Overview

SlidingDrawer hides content out of the screen and allows the user to drag a handle to bring the content on screen. SlidingDrawer can be used vertically or horizontally. A special widget composed of two children views: the handle, that the users drags, and the content, attached to the handle and dragged with it. SlidingDrawer should be used as an overlay inside layouts. This means SlidingDrawer should only be used inside of a FrameLayout or a RelativeLayout for instance. The size of the SlidingDrawer defines how much space the content will occupy once slid out so SlidingDrawer should usually use match_parent for both its dimensions. Inside an XML layout, SlidingDrawer must define the id of the handle and of the content:

<SlidingDrawer
    android:id="@+id/drawer"
    android:layout_width="match_parent"
    android:layout_height="match_parent"

    android:handle="@+id/handle"
    android:content="@+id/content">

    <ImageView
        android:id="@id/handle"
        android:layout_width="88dip"
        android:layout_height="44dip" />

    <GridView
        android:id="@id/content"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</SlidingDrawer>

【1】简单的说就是：

SlidingDrawer是一个可以实现抽取式显示的控件，可以垂直，水平拉取，每个抽屉都包含两个东西：一个是拉手（handle），一个是抽屉里面的东西（content），SlidingDrawer需要放置在另外的一个layout之上，这意味着SlidingDrawer只能放置在 FrameLayout or a RelativeLayout里面。SlidingDrawer需要设置宽高为match_parent，而且在SlidingDrawer里面必须设置handle与content（显然，不然缺少任何一个都不叫“抽屉”啊）

【2】一些重要的属性与方法：

XML Attributes
Attribute Name	Related Method	Description
android:allowSingleTap		Indicates whether the drawer can be opened/closed by a single tap on the handle. 指示是否可以通过handle打开或关闭
android:animateOnClick		Indicates whether the drawer should be opened/closed with an animation when the user clicks the handle. 指示是否当使用者按下手柄打开/关闭时是否该有一个动画
android:bottomOffset		Extra offset for the handle at the bottom of the SlidingDrawer.
android:content		Identifier for the child that represents the drawer's content.指定抽屉的内容
android:handle		Identifier for the child that represents the drawer's handle.指定把手handle
android:orientation		Orientation of the SlidingDrawer. 水平还是垂直
android:topOffset		Extra offset for the handle at the top of the SlidingDrawer.

Public Methods
void	animateClose() Closes the drawer with an animation. 关闭动画
void	animateOpen() Opens the drawer with an animation. 打开动画
void	animateToggle() Toggles the drawer open and close with an animation.
void	close() Closes the drawer immediately.
View	getContent() Returns the content of the drawer. 获取抽屉的内容
View	getHandle() Returns the handle of the drawer. 获取抽屉的把手
boolean	isMoving() Indicates whether the drawer is scrolling or flinging .判断是否在移动
boolean	isOpened() Indicates whether the drawer is currently fully opened. 是否打开
void	lock() Locks the SlidingDrawer so that touch events are ignores. 锁死抽屉
boolean	onInterceptTouchEvent( MotionEvent event) Implement this method to intercept all touch screen motion events.
boolean	onTouchEvent( MotionEvent event) Implement this method to handle touch screen motion events.
void	open() Opens the drawer immediately. 打开抽屉
void	setOnDrawerCloseListener( SlidingDrawer.OnDrawerCloseListener onDrawerCloseListener) Sets the listener that receives a notification when the drawer becomes close. 设置关闭抽屉监听
void	setOnDrawerOpenListener( SlidingDrawer.OnDrawerOpenListener onDrawerOpenListener) Sets the listener that receives a notification when the drawer becomes open. 设置打开抽屉监听
void	setOnDrawerScrollListener( SlidingDrawer.OnDrawerScrollListener onDrawerScrollListener) Sets the listener that receives a notification when the drawer starts or ends a scroll. 设置拉动抽屉监听
void	toggle() Toggles the drawer open and close. 切换打开和关闭的抽屉。
void	unlock() Unlocks the SlidingDrawer so that touch events are processed. 解锁