Android Aidl Compile Error: couldn't find import for class

问题:

(I know there're multiple questions on stackoverflow and elsewhere (like google group) about adding parcelable for NetworkInfo but this is not about that.)

My work is under $(AOSP_ROOT)/device/ and involves multiple aidl files. one of it is like,

package com.example;  parcelable SomeRequest; 

And another aidl is like,

package com.example;  import com.example.SomeRequest; interface SomeService {     SomeRequest getRequest(); } 

And I'll get compile errors like,

device/somedevice/sdk/libs/aidl/com/example/SomeService.aidl:9: couldn't find import for class com.example.SomeRequest 

I'm wondering it is the order of processing aidl files. My Android.mk looks like,

LOCAL_SRC_FILES := $(call all-java-files-under, src) $(call all-Iaidl-files-under, aidl) LOCAL_AIDL_INCLUDES := $(call all-Iaidl-files-under, aidl) 

This build error is introduced after I moved aidl files from src/ folder to aidl/ folder (for some reason I have to do so). It worked before but now even if I moved it back to src/ folder it doesn't work anymore. I tried to clean up $(AOSP_ROOT)/out/device/target but it's not helping.

Ideas?

回答1:

Finally I got it resolved.

If you dig into /build/core/base_rules.mk, you'll find that LOCAL_AIDL_INCLUDES is actually the folders to be included during AIDL compiling phase in addition to the default folders like framework or so.

$(aidl_java_sources): PRIVATE_AIDL_FLAGS := -b $(addprefix -p,$(aidl_preprocess_import)) -I$(LOCAL_PATH) -I$(LOCAL_PATH)/src $(addprefix -I,$(LOCAL_AIDL_INCLUDES)) 

In this specific case, what you want is actually,

LOCAL_SRC_FILES := $(call all-java-files-under, src) $(call all-Iaidl-files-under, aidl) LOCAL_AIDL_INCLUDES := $(LOCAL_PATH)/aidl 

回答2:

So I looked around - the solution is to put the AIDL files only into their own directory called aidl, which I think some others have suggested.

It turns out that Android Studio looks there, but doesn't quite know what to do about .aidl files put in the src directory.

I don't get it. I just don't get it. AIDL imports worked perfectly in Eclipse. Android Studio is not production ready. This is a major step backwards.

I'm was having trouble getting the AIDL compiler to find imports as well, and I'm thinking there has to be a better way than modifying base_rules.mk, which the platform manages.

Arg!

回答3:

Ok, so I was struggling for days trying to figure out this same problem. Clean/Rebuilds didn't work for me. Eventually, I realized a really simple mistake I was doing in Android Studio - When I right-clicked my mouse and created a new "AIDL", I wasn't clicking in the appropriate folder as my original model classes.

For example, my model was in a java package called com.example.model, but I wasn't right-clicking in that folder when I created my AIDL. So when Android Studio generates the AIDL folder for me, it would reference the wrong folder, and I would end up with a compile error. I wish the android documentation made it clear that we needed to be right-clicking in the appropriate folder before generating the AIDL files. I know, it sounds silly, but I hope this answer applies to some of you!

回答4:

just need name the .aidl file to be same as the .java file!

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