Android笔记:SlidingDrawer
一、概述
抽屉控件，官方已不建议用；但在某些需求下直接使用这个控件还是相当方便的。
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<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>
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1.XML文件中的属性
| 属性名称 |
描述 |
| android:allowSingleTap |
是否可通过单击handle打开或关闭抽屉。 默认是true。（如果是false，用户必须通过拖动，滑动或者使用轨迹球。） |
| android:animateOnClick |
顾名思义，点击的时候是否有动画。默认是true。 |
| android:bottomOffset |
“手柄”距离SlidingDrawer底部的额外距离 。 |
| android:content |
SlidingDrawer的内容。 |
| android:handle |
SlidingDrawer的“手柄”。 |
| android:orientation |
SlidingDrawer的方向。 |
| android:topOffset |
“手柄”距离SlidingDrawer顶部的额外距离 。 |
2.一些重要的方法：
void setOnDrawerCloseListener (SlidingDrawer.OnDrawerCloseListener onDrawerCloseListener)
设置一个监听器，用来接收当抽屉被关闭时候的通知。
void setOnDrawerOpenListener (SlidingDrawer.OnDrawerOpenListener onDrawerOpenListener)
Since: API Level 3
设置一个监听器，用来接收当抽屉被打开的时候的通知。
void setOnDrawerScrollListener (SlidingDrawer.OnDrawerScrollListener onDrawerScrollListener)
设置一个监听器，用来接收当抽屉处于正在打开或者正在结束的滚动时候的通知。
animateClose()：
使用动画关闭抽屉。
animateOpen ()：
使用动画打开抽屉
getContent()：
获取内容
isMoving()：
指示SlidingDrawer是否在移动。
isOpened()：
指示SlidingDrawer是否已全部打开
lock()：
屏蔽触摸事件。
unlock()：
解除屏蔽触摸事件。
toggle()：
切换打开和关闭的抽屉SlidingDrawer。
3.一个简单的例子:
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public
class
SlidingDrawerDemoActivity
extends
Activity {
private
SlidingDrawer myDrawer;
private
ImageView myImageView;
private
GridView myGridView;
@Override
protected
void
onCreate(Bundle savedInstanceState) {
super
.onCreate(savedInstanceState);
setContentView(R.layout.main);
myDrawer = (SlidingDrawer) findViewById(R.id.drawer);
myImageView = (ImageView)findViewById(R.id.handle);
myGridView = (GridView)findViewById(R.id.content);
myDrawer.setOnDrawerOpenListener(newSlidingDrawer.OnDrawerOpenListener() {
@Override
public
void
onDrawerOpened() {
myImageView.setImageResource(R.drawable.down);
}
});
myDrawer.setOnDrawerCloseListener(newSlidingDrawer.OnDrawerCloseListener() {
@Override
public
void
onDrawerClosed() {
myImageView.setImageResource(R.drawable.up);
}
});
}
}
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二、可监听按钮点击事件的自定义SlidingDrawer
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import
android.content.Context;
import
android.graphics.Rect;
import
android.util.AttributeSet;
import
android.view.MotionEvent;
import
android.view.View;
import
android.view.ViewGroup;
import
android.widget.SlidingDrawer;
/**
* 自定义SlidingDrawer：可监听按钮点击事件
* @author zeng
*
*/
public
class
ClickableSlidingDrawer
extends
SlidingDrawer
{
private
ViewGroup mHandleLayout;
private
final
Rect mHitRect =
new
Rect();
public
ClickableSlidingDrawer(Context context, AttributeSet attrs,
int
defStyle)
{
super
(context, attrs, defStyle);
}
public
ClickableSlidingDrawer(Context context, AttributeSet attrs)
{
super
(context, attrs);
}
@Override
protected
void
onFinishInflate()
{
super
.onFinishInflate();
View handle = getHandle();
if
(handle
instanceof
ViewGroup)
{
mHandleLayout = (ViewGroup) handle;
}
}
@Override
public
boolean
onInterceptTouchEvent(MotionEvent event)
{
if
(mHandleLayout !=
null
)
{
int
childCount = mHandleLayout.getChildCount();
int
handleClickX = (
int
) (event.getX() - mHandleLayout.getX());
int
handleClickY = (
int
) (event.getY() - mHandleLayout.getY());
Rect hitRect = mHitRect;
for
(
int
i =
0
; i < childCount; i++)
{
View childView = mHandleLayout.getChildAt(i);
childView.getHitRect(hitRect);
if
(hitRect.contains(handleClickX, handleClickY))
{
return
false
;
}
}
}
return
super
.onInterceptTouchEvent(event);
}
}
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三、控制SlidingDrawer在屏幕低端，而不会填满整个屏幕,同时handle按钮可点击的自定义SlidingDrawer
注:解决SlidingDrawer的高度设置为wrap_content时无法做到非全屏的问题。
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import
android.content.Context;
import
android.graphics.Rect;
import
android.util.AttributeSet;
import
android.view.MotionEvent;
import
android.view.View;
import
android.view.ViewGroup;
import
android.widget.SlidingDrawer;
/**
* 自定义SlidingDrawer，控制SlidingDrawer在屏幕低端，而不会填满整个屏幕,同时handle按钮可点击
* @author zeng
*
*/
public
class
ClickableWrapSlidingDrawer
extends
SlidingDrawer
{
private
ViewGroup mHandleLayout;
private
final
Rect mHitRect =
new
Rect();
private
boolean
mVertical;
private
int
mTopOffset;
public
ClickableWrapSlidingDrawer(Context context, AttributeSet attrs,
int
defStyle)
{
super
(context, attrs, defStyle);
int
orientation = attrs.getAttributeIntValue(
"android"
,
"orientation"
, ORIENTATION_VERTICAL);
mTopOffset = attrs.getAttributeIntValue(
"android"
,
"topOffset"
,
0
);
mVertical = (orientation == SlidingDrawer.ORIENTATION_VERTICAL);
}
public
ClickableWrapSlidingDrawer(Context context, AttributeSet attrs)
{
super
(context, attrs);
int
orientation = attrs.getAttributeIntValue(
"android"
,
"orientation"
, ORIENTATION_VERTICAL);
mTopOffset = attrs.getAttributeIntValue(
"android"
,
"topOffset"
,
0
);
mVertical = (orientation == SlidingDrawer.ORIENTATION_VERTICAL);
}
@Override
protected
void
onMeasure(
int
widthMeasureSpec,
int
heightMeasureSpec)
{
int
widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);
int
widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);
int
heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);
int
heightSpecSize = MeasureSpec.getSize(heightMeasureSpec);
final
View handle = getHandle();
final
View content = getContent();
measureChild(handle, widthMeasureSpec, heightMeasureSpec);
if
(mVertical)
{
int
height = heightSpecSize - handle.getMeasuredHeight() - mTopOffset;
content.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(height, heightSpecMode));
heightSpecSize = handle.getMeasuredHeight() + mTopOffset + content.getMeasuredHeight();
widthSpecSize = content.getMeasuredWidth();
if
(handle.getMeasuredWidth() > widthSpecSize)
widthSpecSize = handle.getMeasuredWidth();
}
else
{
int
width = widthSpecSize - handle.getMeasuredWidth() - mTopOffset;
getContent().measure(MeasureSpec.makeMeasureSpec(width, widthSpecMode), heightMeasureSpec);
widthSpecSize = handle.getMeasuredWidth() + mTopOffset + content.getMeasuredWidth();
heightSpecSize = content.getMeasuredHeight();
if
(handle.getMeasuredHeight() > heightSpecSize)
heightSpecSize = handle.getMeasuredHeight();
}
setMeasuredDimension(widthSpecSize, heightSpecSize);
}
@Override
protected
void
onFinishInflate()
{
super
.onFinishInflate();
View handle = getHandle();
if
(handle
instanceof
ViewGroup)
{
mHandleLayout = (ViewGroup) handle;
}
}
@Override
public
boolean
onInterceptTouchEvent(MotionEvent event)
{
if
(mHandleLayout !=
null
)
{
int
childCount = mHandleLayout.getChildCount();
int
handleClickX = (
int
) (event.getX() - mHandleLayout.getX());
int
handleClickY = (
int
) (event.getY() - mHandleLayout.getY());
Rect hitRect = mHitRect;
for
(
int
i =
0
; i < childCount; i++)
{
View childView = mHandleLayout.getChildAt(i);
childView.getHitRect(hitRect);
if
(hitRect.contains(handleClickX, handleClickY))
{
return
false
;
}
}
}
return
super
.onInterceptTouchEvent(event);
}
}
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本文转自 glblong 51CTO博客，原文链接：http://blog.51cto.com/glblong/1548354，如需转载请自行联系原作者
