Android控件之SlidingDrawer（滑動式抽屜）

一、簡介
SlidingDrawer隱藏屏外的內容，并允許用戶通過handle以顯示隱藏內容。它可以垂直或水平滑動，它有倆個View組成，其一是可以拖動的 handle，其二是隱藏內容的View。它里面的控件必須設置布局，在布局文件中必須指定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、重要屬性
android:allowSingleTap：指示是否可以通過handle打開或關閉
android:animateOnClick：指示是否當使用者按下手柄打開/關閉時是否該有一個動畫。
android:content：隱藏的內容
android:handle：handle（手柄）

三、重要方法
animateClose()：關閉時實現動畫
close()：即時關閉
getContent()：獲取內容
isMoving()：指示SlidingDrawer是否在移動
isOpened()：指示SlidingDrawer是否已全部打開
lock()：屏蔽觸摸事件
setOnDrawerCloseListener(SlidingDrawer.OnDrawerCloseListener onDrawerCloseListener)：SlidingDrawer關閉時調用
unlock()：解除屏蔽觸摸事件
toggle()：切換打開和關閉的抽屜SlidingDrawer

四、完整實例
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;
    }
   });
    }  
}