在这里我是:
项目用到的相关类库和工程：
a.Android-PullToRefresh-master: 强大的下拉刷新类库
b.android-support-v7-appcompat: Android系统提供的v7包，提供了ActionBar等高级的类
导入类库报错：
[2015-07-19 11:33:14 - 谷歌市场xian1] Jar mismatch! Fix your dependencies
[2015-07-19 11:33:33 - 谷歌市场xian1] Found 2 versions of android-support-v4.jar in the dependency list,
[2015-07-19 11:33:33 - 谷歌市场xian1] but not all the versions are identical (check is based on SHA-1 only at this time).
[2015-07-19 11:33:33 - 谷歌市场xian1] All versions of the libraries must be the same at this time.
[2015-07-19 11:33:33 - 谷歌市场xian1] Versions found are:
[2015-07-19 11:33:33 - 谷歌市场xian1] Path: G:PrepareWorkspaceandroid-support-v7-appcompatlibsandroid-support-v4.jar
[2015-07-19 11:33:33 - 谷歌市场xian1] Length: 627582
[2015-07-19 11:33:33 - 谷歌市场xian1] SHA-1: db0f122c99ef9f90dbab3fada6d191f2880cbb8e
[2015-07-19 11:33:33 - 谷歌市场xian1] Path: G:PrepareWorkspace谷歌市场xian1libsandroid-support-v4.jar
[2015-07-19 11:33:33 - 谷歌市场xian1] Length: 385685
[2015-07-19 11:33:33 - 谷歌市场xian1] SHA-1: 48c94ae70fa65718b382098237806a5909bb096e
[2015-07-19 11:33:33 - 谷歌市场xian1] Jar mismatch! Fix your dependencies
解决方案：删除其中一个length比较小的