Android Launcher抽屉类SlidingDrawer的使用

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:

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<?xmlversion="1.0"encoding="utf-8"?>
 <LinearLayoutxmlns: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>
 <?xmlversion="1.0"encoding="utf-8"?>
 <LinearLayoutxmlns: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:

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 <?xmlversion="1.0"encoding="utf-8"?>
 <selectorxmlns:android="http://schemas.android.com/apk/res/android">
 <itemandroid:state_window_focused="false"android:state_enabled="true"android:drawable="@drawable/handle_normal"/>
 <itemandroid:state_pressed="true"android:drawable="@drawable/handle_pressed"/>
 <itemandroid:state_focused="true"android:state_enabled="true"android:drawable="@drawable/handle_focused"/>
 <itemandroid:state_enabled="true"android:drawable="@drawable/handle_normal"/>
 <itemandroid:state_focused="true"android:drawable="@drawable/handle_focused"/>
 </selector>
 <?xmlversion="1.0"encoding="utf-8"?>
 <selectorxmlns:android="http://schemas.android.com/apk/res/android">
 <itemandroid:state_window_focused="false"android:state_enabled="true"android:drawable="@drawable/handle_normal"/>
 <itemandroid:state_pressed="true"android:drawable="@drawable/handle_pressed"/>
 <itemandroid:state_focused="true"android:state_enabled="true"android:drawable="@drawable/handle_focused"/>
 <itemandroid:state_enabled="true"android:drawable="@drawable/handle_normal"/>
 <itemandroid: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！

转载自： http://weizhulin.blog.51cto.com/1556324/311461