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一、概述
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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。
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。
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);
}
});
}
}二、可监听按钮点击事件的自定义SlidingDrawer
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);
}
}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。
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);
}
}