Android控件之SlidingDrawer（滑动式抽屉）

一、简介
SlidingDrawer隐藏屏外的内容，并允许用户通过handle以显示隐藏内容。它可以垂直或水平滑动，它有俩个View组成，其一是可以拖动的 handle，其二是隐藏内容的View。它里面的控件必须设置布局，在布局文件中必须指定handle和content。例：

    <SlidingDrawer      android:id="@+id/slidingDrawer"      android:layout_width="fill_parent"      android:layout_height="wrap_content"      android:handle="@+id/slidingDrawerButton"      android:content="@+id/content"      android:background="#ffffff">      <Button      android:id="@+id/slidingDrawerButton"      android:layout_width="fill_parent"      android:layout_height="wrap_content">      </Button>      <LinearLayout      android:id="@+id/content"      android:layout_width="fill_parent"      android:layout_height="wrap_content"      android:background="#ffffff">      <Button      android:id="@+id/button"      android:layout_width="wrap_content"      android:layout_height="wrap_content">      </Button>      <EditText      android:id="@+id/editText"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:background="#00ff00">      </EditText>      <TextView      android:id="@+id/textView"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:text="@string/hello"      android:background="#0000ff"      />      </LinearLayout>      </SlidingDrawer>

二、重要属性
android:allowSingleTap：指示是否可以通过handle打开或关闭
android:animateOnClick：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:content：隐藏的内容
android:handle：handle（手柄）

三、重要方法
animateClose()：关闭时实现动画
close()：即时关闭
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
setOnDrawerCloseListener(SlidingDrawer.OnDrawerCloseListener onDrawerCloseListener)：SlidingDrawer关闭时调用
unlock()：解除屏蔽触摸事件
toggle()：切换打开和关闭的抽屉SlidingDrawer

四、完整实例
1.main.xml

<?xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"      android:orientation="vertical"      android:layout_width="fill_parent"      android:layout_height="fill_parent"      >       <LinearLayout       android:id="@+id/linearLayout"      android:layout_width="fill_parent"      android:layout_height="100px"      android:background="#0000ff">      </LinearLayout>      <SlidingDrawer      android:id="@+id/slidingDrawer"      android:layout_width="fill_parent"      android:layout_height="wrap_content"      android:handle="@+id/slidingDrawerButton"      android:content="@+id/content"      android:background="#ffffff">      <Button      android:id="@+id/slidingDrawerButton"      android:layout_width="fill_parent"      android:layout_height="wrap_content">      </Button>      <LinearLayout      android:id="@+id/content"      android:layout_width="fill_parent"      android:layout_height="wrap_content"      android:background="#ffffff">      <Button      android:id="@+id/button"      android:layout_width="wrap_content"      android:layout_height="wrap_content">      </Button>      <EditText      android:id="@+id/editText"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:background="#00ff00">      </EditText>      <TextView      android:id="@+id/textView"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:text="@string/hello"      android:background="#0000ff"      />      </LinearLayout>      </SlidingDrawer>  </LinearLayout>

2.

SlidingDrawer.java    package SlidingDrawer.com;    import android.app.Activity;  import android.os.Bundle;  import android.view.MotionEvent;  import android.view.View;  import android.widget.LinearLayout;    public class SlidingDrawer extends Activity {      /** Called when the activity is first created. */      @Override      public void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.main);                   android.widget.SlidingDrawer mDrawer;          final LinearLayout mLinearLayout;                   mDrawer=(android.widget.SlidingDrawer)findViewById(R.id.slidingDrawer);          mDrawer.open();          mLinearLayout=(LinearLayout)findViewById(R.id.linearLayout);                     mDrawer.setOnDrawerOpenListener(new android.widget.SlidingDrawer.OnDrawerOpenListener()          {        public void onDrawerOpened() {       // TODO Auto-generated method stub       LinearLayout.LayoutParams linearParams = (LinearLayout.LayoutParams) mLinearLayout.getLayoutParams();             linearParams.height=100;             mLinearLayout.setLayoutParams(linearParams);      }          });          mDrawer.setOnDrawerCloseListener(new android.widget.SlidingDrawer.OnDrawerCloseListener(){        public void onDrawerClosed() {       // TODO Auto-generated method stub       LinearLayout.LayoutParams linearParams = (LinearLayout.LayoutParams) mLinearLayout.getLayoutParams();             linearParams.height=400;             mLinearLayout.setLayoutParams(linearParams);      }          });          mDrawer.setOnTouchListener(new View.OnTouchListener() {           public boolean onTouch(View v, MotionEvent event) {       // TODO Auto-generated method stub       return false;      }     });      }    }