Project has no project.properties file! Edit the project properties to set one.
[2016-07-13 13:48:05 -] Unable to resolve target 'android-19'
[2016-07-13 13:48:05 -] Unable to resolve target 'android-19'
[2016-07-13 13:48:05 -] Unable to resolve target 'android-19'
我已经改了sdk还不好使，怎么办？
Project has no project.properties file! 是不是缺少文件了
答案在这里：
http://blog.csdn.net/love_javc_you/article/details/37728355
版权原因，就不复制了，记得采纳哦~