(二)Android Launcher抽屉类SlidingD

最近在研究Lanucher,看了源码,发现了SlidingDrawer这个类,也就是所谓的"抽屉"类。它的用法很简单,要包括handle,和content.

 

handle就是当你点击它的时候,content要么抽抽屉要么关抽屉。别的不多说了,具体步骤如下.

 

1.新建Android工程,命名为SlidingDrawer.

 

2.准备素材,在这里我的图标是用Launcher2里面的图标,放在drawable-hdpi文件夹目录结构如下:

 

 

 

3.设置main.xml布局:代码如下:

 

<?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" android:background="#808080" >
<SlidingDrawer android:id="@+id/slidingdrawer" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:handle="@+id/handle" android:content="@+id/content"> 
<Button android:id="@+id/handle" android:layout_width="88dip" android:layout_height="44dip" android:background="@drawable/handle" /> 
<LinearLayout android:id="@+id/content" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#00ff00"> 
<Button android:id="@+id/button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button" /> 
<EditText android:id="@+id/editText" android:layout_width="fill_parent" android:layout_height="wrap_content" />
</LinearLayout>
</SlidingDrawer>
</LinearLayout>


 

4.设置handle图标的样式,在drawable里添加handle.xml,代码如下:

 

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
<item android:state_window_focused="false" android:state_enabled="true" android:drawable="@drawable/handle_normal" /> 
<item android:state_pressed="true" android:drawable="@drawable/handle_pressed" /> 
<item android:state_focused="true" android:state_enabled="true" android:drawable="@drawable/handle_focused" /> 
<item android:state_enabled="true" android:drawable="@drawable/handle_normal" /> 
<item android:state_focused="true" android:drawable="@drawable/handle_focused" />
</selector>

 

5.运行之。将会得到如下效果:

 

 

 

的比较简单呵呵,如果想深入了解,大家看Launcher源码吧!

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