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SlidingDrawer 隐藏部分内容，该控件可以实现抽屉效果。

如下 xml 文件

<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>



SlidingDrawer

中的android:content="@+id/content"

表示要隐藏的内容，
		android:handle="@+id/handle"

表示控制content

显示或者隐藏的控件（可以是一个按钮）

animateToggle() 打开和关闭自动切换

animateClose() 关闭内容

animateOpen() 打开内容

//这个是手机内存的可用空间大小

static public long getAvailableInternalMemorySize() {
File path = Environment.getDataDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long availableBlocks = stat.getAvailableBlocks();
return availableBlocks * blockSize;
}

//这个是手机内存的总空间大小

static public long getTotalInternalMemorySize() {
File path = Environment.getDataDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long totalBlocks = stat.getBlockCount();
return totalBlocks * blockSize;
}

//这个是手机sdcard的可用空间大小

static public long getAvailableExternalMemorySize() {
if (externalMemoryAvailable()) {
File path = Environment.getExternalStorageDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long availableBlocks = stat.getAvailableBlocks();
return availableBlocks * blockSize;
} else {
return ERROR;
}
}

//这个是手机sdcard的总空间大小

static public long getTotalExternalMemorySize() {
if (externalMemoryAvailable()) {
File path = Environment.getExternalStorageDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long totalBlocks = stat.getBlockCount();
return totalBlocks * blockSize;
} else {
return ERROR;
}
}
private static final int ERROR = -1;

/**
* SDCARD是否存
*/
public static boolean externalMemoryAvailable() {
return android.os.Environment.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED);
}