Android.bp can't link java static library built from Android,mk

[Jack Rong]

I have a scenario that is to link in a Java static library built from an Android.mk file to complete the whole AOSP image build in Android P. The build system somehow is not versatile enough to discover the static library built from other project using the Android.mk. Here is an example:

 1) Android.mk file at the "package/app/MyLibs"

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE := libmine

LOCAL_SRC_FILES := \

$(call all-java-files-under, src/main/java) \

$(call all-Iaidl-files-under, src/main/aidl)

ifneq ($(filter 28,$(PLATFORM_SDK_VERSION)),)

LOCAL_PRIVATE_PLATFORM_APIS := true

else

LOCAL_SDK_VERSION := current

endif

LOCAL_STATIC_JAVA_LIBRARIES := libgson

LOCAL_PROGUARD_FLAG_FILES := proguard.flags

include $(BUILD_STATIC_JAVA_LIBRARY)

2) Android.bp at "frameworks/base/services/devicepolicy"

java_library_static {

    name: "services.devicepolicy",

    srcs: ["java/**/*.java"],

    libs: [

        "conscrypt",

        "services.core",

    ],

    static_libs: [

        "libmine",

    ],

}

3) Build message:

error: frameworks/base/services/devicepolicy/Android.bp:1:1: "services.devicepolicy" depends on undefined module "libmine"

[Dan Willemsen]

All dependencies of an Android.bp file must be in Android.bp, not Android.mk. So you'll need to convert your libmine description to an Android.bp file.

- Dan

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[Jack Rong]

Thanks a lot Dan for your reply.  Here is my question to Google, why you break the backward compatibility like that. Would it be much better to let the "Android.bp" recognize the library or entity exported from Android.mk. There are hundreds of Android,mk files still exist in AOSP source tree in Android 10.

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