Android Studio报错：Manifest merger failed : uses-sdk:minSdkVersion 1 cannot be smaller than version

minSdkVersion定义在自己的工程中和引用的系统库中不一致，修正工程中的定义

The problem is because your app min sdk is 1 and you selected to use
the Google Plus services that requires min sdk 9.

Change the line “minSdkVersion 8” to “minSdkVersion 9”. So, save it.

After, Clean Project and Rebuild it.

参考
http://stackoverflow.com/questions/24718824/manifest-merger-failed-uses-sdkminsdkversion-8-cannot-be-smaller

解决 Android Studio : minSdkVersion 8 cannot be smaller than version L