编译项目出错如下：
Description Resource Path Location Type
The project was not built since its buildpath is incomplete. Cannot find the class file for java.lang.Object. Fix thebuild path then try building this project
Description Resource Path Location Type
Unable to resolve target 'android-23' Unknown Android Target Problem
Description Resource Path Location Type
error: No resource identifier found forattribute 'letterSpacing' in package 'android'
原因
目标设备是Android 6.0, 需要使用的API为23，查看Project Properties中Android选项，查看到当前只有Android 4.4.2的版本API 19，所以需要更新SDK
本文转自fengyuzaitu 51CTO博客，原文链接：http://blog.51cto.com/fengyuzaitu/1418872，如需转载请自行联系原作者
