Android Studio依赖项目出现unspecified on project app resolves to an APK archive which is not supported

相信有些人也遇到过,在android studio开发的时候 突然想依赖另外一个Modue 如果直接去设置依赖就会出现

Error:Dependency EwMesPid:barcodescanner:unspecified on project app resolves to an APK archive which is not supported as a compilation dependency.的错误,其实这个就是需要把你所依赖项目的build.gradle文件中第一行
apply plugin: 'com.android.application'
//把上面的替换成下面的就可以了
apply plugin: 'com.android.library'当然这样还是不够 你继续同步还会出现这个错误
Error:Library projects cannot set applicationId. applicationId is set to 'com.aaa.xxx' in default config.这个问题也很简单,你只需要删除build.gradle文件中 把applicationId "com.aaa.xxx"这一句删掉就行了
defaultConfig {
applicationId "com.aaa.xxx"
minSdkVersion 15

就这样吧