今天还了系统app里面的图片，重新编译出错：
ERROR: 9-patch image packages/apps/Settings/res/drawable-hdpi/app_gauge.9.png malformed.
Must have one-pixel frame that is either transparent or white.
ERROR: Failure processing PNG image packages/apps/Settings/res/drawable-hdpi/app_gauge.9.png
发现竟然是跟图片的优化有关，所以，把上面出现的图片统统按照draw9patch修改，问题解决了。
