Android Studio 解决unspecified on project app resolves to an APK archive which is not supported

出现该问题unspecified on project app resolves to an APK archive which is not supported as a compilation dependency的情形可能是:创建了两个Module,其中一个Module依赖另一个Module而导致了出现该问题;

如果在Android Studio中,有ModuleA和ModuleB,我们希望ModuleA依赖ModuleB,运行时候可能会出现该问题,查看被依赖的ModuleB的build.gradle,里面可以看到:

apply plugin: 'com.android.application'  

这句话告诉了Gradle将ModuleB编译称为application,也就是apk,这就是问题的所在;

解决方法:将上面该句改为:

apply plugin: 'com.android.library'  

此时,Gradle将编译称为一个Library,也就是库,运行之后,如果出现这个问题:Error:Library projects cannot set applicationId. applicationId is set to 'package_name' in default config.,那是因为一个库不允许设置applicationId,需要将builde.gradle — android — defaultConfig中的applicationId删除;

如果说,我们ModuleB仍然需要生成apk,则我们需要将其中公共的代码放到一个Module,作为一个support的库;

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