关于apt和compile的区别

[祁连山呢]

在使用dagger2的时候，如果gradle配置如下的时候编译报错

    compile 'com.google.dagger:dagger:2.4'
    compile 'com.google.dagger:dagger-compiler:2.4'
    provided 'org.glassfish:javax.annotation:10.0-b28'

error：Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.eclipse.core.internal.jobs.JobListeners$1) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
...
但如果配置改为

    compile 'com.google.dagger:dagger:2.4'
    apt 'com.google.dagger:dagger-compiler:2.4'
    provided 'org.glassfish:javax.annotation:10.0-b28'

就可以正常编译通过，请问dependencies配置中的apt和compile到底有什么不同，

[网易云捕]

compile会编译到最后的APK或library，apt不会