Android--SlidingDrawer的使用介绍

SlidingDrawer类使用的时候主要包括两点：
1：handle：单击的按钮

2：content：抽屉中的内容，单击按钮时，抽屉的内容隐藏或显示

下面这段xml布局是摘自Google SDK帮助文档：

<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>

下面给出一个实例

首先实例的实现截图如下：

实现滑动效果

给出如下实现代码：

1.总体布局文件的代码

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout  
  xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent"
>
  <TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    android:textSize="16sp"
  />
  <SlidingDrawer 
    android:id="@+id/drawer1" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    
    android:handle="@+id/layout1" 
    android:content="@+id/myContent1" 
    
    android:orientation="horizontal"
  >
    <LinearLayout 
      android:id="@id/layout1" 
      android:layout_width="35px" 
      android:layout_height="fill_parent"
      android:background="@drawable/black"
      android:gravity="center" 
    >
      <ImageView
        android:id="@+id/myImage1" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:src="@drawable/open"
      />
    </LinearLayout>
    <GridView 
      android:id="@id/myContent1" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:numColumns="2"
      android:background="@drawable/black" 
      android:gravity="center"
    />       
  </SlidingDrawer>
</RelativeLayout>

2.GridView中的布局代码

<?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"
>
  <ImageView 
    android:id="@+id/icon"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
  />
  <TextView 
    android:id="@+id/text"
    android:layout_width="fill_parent"
    android:layout_height="20sp"
    android:gravity="center"
    android:textColor="@drawable/white"
  />
</LinearLayout>

3.BaseAdapter的子类实现（为GridView提供数据）

/* 自定义Adapter，继承BaseAdapter */
public class MyGridViewAdapter extends BaseAdapter 
{ 
  private Context _con;
  private String[] _items;
  private int[] _icons;
  /* 构造符 */
  public MyGridViewAdapter(Context con,String[] items,int[] icons) 
  {
    _con=con;
    _items=items;
    _icons=icons;
  }

  @Override
  public int getCount()
  {
    return _items.length;
  }

  @Override
  public Object getItem(int arg0)
  {
    return _items[arg0];
  }

  @Override
  public long getItemId(int position)
  {
    return position;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent)
  {
    LayoutInflater factory = LayoutInflater.from(_con);
    /* 使用grid.xml为每几个item的Layout */
    View v = (View) factory.inflate(R.layout.grid, null);
    /* 取得View */
    ImageView iv = (ImageView) v.findViewById(R.id.icon);
    TextView tv = (TextView) v.findViewById(R.id.text);
    /* 设定显示的Image与文? */
    iv.setImageResource(_icons[position]);
    tv.setText(_items[position]);
    return v;
  } 
} 

4.主程序的实现

public class EX04_27 extends Activity
{
  private GridView gv;
  private SlidingDrawer sd;
  private ImageView im;
  private int[] icons={R.drawable.alarm,R.drawable.calendar,
                       R.drawable.camera,R.drawable.clock,
                       R.drawable.music,R.drawable.tv};
  private String[] items={"Alarm","Calendar","Camera","Clock","Music","TV"};
    
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    /* 加载main.xml Layout */
    setContentView(R.layout.main);
    /* 初始化对象 */
    gv = (GridView)findViewById(R.id.myContent1); 
    sd = (SlidingDrawer)findViewById(R.id.drawer1);
    im=(ImageView)findViewById(R.id.myImage1);
    
    /* 使用告定义的MyGridViewAdapter设置GridView里面的item内容 */
    MyGridViewAdapter adapter=new MyGridViewAdapter(this,items,icons);
    gv.setAdapter(adapter);
    
    /* 设定SlidingDrawer被打开的事件处理 */
    sd.setOnDrawerOpenListener(new SlidingDrawer.OnDrawerOpenListener()
    {
      @Override
      public void onDrawerOpened()
      {
        im.setImageResource(R.drawable.close);
      }
    });
    /* 设置SlidingDrawer被关闭的事件处理 */
    sd.setOnDrawerCloseListener(new SlidingDrawer.OnDrawerCloseListener()
    {
      @Override
      public void onDrawerClosed()
      {
        im.setImageResource(R.drawable.open);
      }
    });
  }
}