因为项目中用到第三级菜单，我们原有的界面框架已经不适用于该项目，Android L出了新的cardview设计，爬了下github发现有些高手已经把card整合为更方便调用的类库了，我这个项目就准备试用一下其中的一个开源项目cardslib      ， 而github我也是初次使用，正好在项目中来熟悉使用方法

首先：

　　cardslib项目地址：https://github.com/gabrielemariotti/cardslib，意大利的一位java/android工程师gabrielemariotti，基于Android L 的cardview做的一个便于引用和扩展的卡片式布局，可以fork一下到自己的代码仓库。

　　我的项目中主要用到其中的library-core和library-cards，以下为作者提供的eclipse中引入该项目为类库的方法（不得不说国外开发牛实在是太贴心了T_T，文档写得尽善尽美，我这种初级菜鸟也能按部就班的实现）：

Reference this project as a library in Eclipse

If you would like to use this library-core in Eclipse you have to do these steps:

• clone a copy of this repository, or download it (outside eclipse workspace)
• import the code in your workspace starting from library folder. The Wizard will import the code in library-core/src/main. I suggest you naming it "cardscore" (or another name) instead of "main".
• mark java(*) folder as source (click on folder -> Build-Path -> use as source folder). You can also remove the src folder, from the project.
• mark cardscore as Android Library (Properties -> Android -> Is library)
• add support library v4 rel.21
• add support cardview library v7 rel.21
• add support annotation library rel.21
• The library targets SDK 21 and works with minSdk=14. In any cases you need to use API>=21 to compile library (Properties -> Android)
• Clean and build

If you would like to use this library-cards in Eclipse you have to do these steps:

• clone a copy of this repository, or download it (outside eclipse workspace)
• import the code in your workspace starting from library folder. The Wizard will import the code in library-cards/src/main. I suggest you naming it "cardscore" (or another name) instead of "main".
• mark java(*) folder as source (click on folder -> Build-Path -> use as source folder). You can also remove the src folder, from the project.
• mark cardscore as Android Library (Properties -> Android -> Is library)
• add the cardscore as library
• The library targets SDK 21 and works with minSdk=14. In any cases you need to use API>=21 to compile library (Properties -> Android)
• Clean and build

注意要点：

1、需要anroid 21的SDK支持

2、把引用代码的main文件夹重命名，并右键build-path该文件夹为"use as source folder"，否则可能会造成代码冲突

3、将工程作为Android Libaray，引入相应support  library

引用后，在build时和编译时分别出过一个问题：

1、build后，报错，Found 4 versions of android-support-v4.jar in the dependency list

查看了报错信息是因为之前引用的滑动菜单的几个library中，android-support-v4的版本和cardslib中所用版本不同。拷cardslib中的v4过去就行了

2、运行时报错，2 Output: UNEXPECTED TOP-LEVEL EXCEPTION: com.android.dex.DexException: Multiple dex files define Landroid/support/annotation/AnimRes;

应该是导入的包和以前的导入有冲突，解决办法简单粗暴：我把我的项目中libs文件夹下的包全部拷出来，然后重建这个文件夹，手动一个个拷进去检查，直到0 error为止（可能有些运行时要用的包没有拷到，以后运行时报错的时候再根据提示单独拷就可以了：）最后在stackoverflow找到原因，引用的library-core库中，新版本的support-v4包已经包含了support-annotations的内容，删去annotations包即可：

The problem is that android-support-annotations.jar used to be a separate library containing the android annotations, but for some reason these annotations are already included in recent versions of the android-support-v4.jar file.