Android应用中怎么实现一个抽屉效果

<&#63;xml version="1.0" encoding="utf-8"&#63;><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="fill_parent"  android:layout_height="fill_parent" >  <SlidingDrawer    android:id="@+id/sliding"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:content="@+id/allApps"    android:handle="@+id/imageViewIcon"    android:orientation="vertical" >    <GridView      android:id="@+id/allApps"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:background="@drawable/bk"      android:columnWidth="60dp"      android:gravity="center"      android:horizontalSpacing="10dp"      android:numColumns="auto_fit"      android:padding="10dp"      android:stretchMode="columnWidth"      android:verticalSpacing="10dp" />    <ImageView      android:id="@+id/imageViewIcon"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:src="@drawable/touch_handler" />  </SlidingDrawer></RelativeLayout>