如何将带有 Android Room 的应用添加为使用 makefile 编译的系统应用？

Posted 2023-04-19

【中文标题】如何将带有 Android Room 的应用添加为使用 makefile 编译的系统应用？

【英文标题】：How to add an app with Android Room as a system app compiled with the makefile?

【发布时间】：2021-01-26 03:59:31

【问题描述】：

尝试安装一个使用 android Room 构建数据库的简单应用，作为 AOSP 中的系统应用。纠结于要在 Android.mk makefile 中包含的内容。

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := $(call all-java-files-under,src)
LOCAL_RESOURCE_DIR := /home/<username>/WORKING_DIRECTORY/packages/apps/appname/res
LOCAL_PROGUARD_ENABLED := disabled
LOCAL_MODULE_TAGS := optional
LOCAL_USE_AAPT2 := true
LOCAL_STATIC_JAVA_LIBRARIES := \
    android-common 

LOCAL_STATIC_ANDROID_LIBRARIES := \
    androidx.annotation_annotation \
    androidx.legacy_legacy-support-core-ui \
    androidx.appcompat_appcompat \
    androidx.core_core \
    androidx.recyclerview_recyclerview \
    androidx.room_room-common \
    androidx.room_room-migration \
    androidx.room_room-runtime \
    androidx.room_room-testing \
    android-support-annotations \
    androidx.cursoradapter_cursoradapter \
    androidx.sqlite_sqlite \
    androidx.sqlite_sqlite-framework \
    androidx.lifecycle_lifecycle-common \
    androidx.lifecycle_lifecycle-common-java8 \
    androidx.lifecycle_lifecycle-runtime \
    androidx.lifecycle_lifecycle-service 

LOCAL_ANNOTATION_PROCESSOR_CLASSES := \
    androidx.room.RoomProcessor

LOCAL_PACKAGE_NAME := com.app.appname
LOCAL_PRIVATE_PLATFORM_APIS := true
LOCAL_CERTIFICATE := platform
LOCAL_PRIVILEGED_MODULE := true

include $(BUILD_PACKAGE)

但是，在“make -j4”之后运行模拟器时会出现错误 -

E AndroidRuntime: java.lang.RuntimeException: 找不到 com.app.appname.RoleManagerDB 的实现。 rolemanagerdb_impl不存在

E AndroidRuntime：在 com.app.appname.RoleManagerDB.getDatabase(RoleManagerDB.java:27) E AndroidRuntime: at com.app.appname.MainActivity.lambda$onCreate$0$MainActivity(MainActivity.java:28)

E AndroidRuntime: at com.app.appname.-$$Lambda$MainActivity$xxx.run(Unknown Source:4) W ActivityTaskManager: 强制完成activity com.app.appname/.MainActivity

我的应用可以在 Android Studio 上顺利编译和运行，那么我在 makefile 中缺少什么？

我的猜测是我似乎无法翻译 gradle 行：

annotationProcessor "androidx.room:room-compiler:$room_version"

到它的makefile等价物。非常感谢任何帮助！

【问题讨论】：

是的，这可能是问题所在。在编译之前，android studio 会进行注释处理，从而创建必要的文件，例如房间接口的实现。所以谷歌关于android.mk中的注释处理

@Harkal 是的，我这样做了，但是我没有遇到 Android.mk 文件的正确注释处理器语句。我试过：“androidx.room_room-compiler-nodeps”“androidx.annotation_annotation”和“android-arch-room-rxjava2”但它失败了。

【参考方案1】：

我也很难找到这方面的信息。

Android 10 蓝牙应用使用 Room，AnnotationProcessor 配置在其 makefile (https://cs.android.com/android/platform/superproject/+/android-10.0.0_r30:packages/apps/Bluetooth/Android.mk)

在我的模块中，我添加了：

include $(CLEAR_VARS)

...

LOCAL_ANNOTATION_PROCESSORS := annotation
LOCAL_ANNOTATION_PROCESSORS += room-common
LOCAL_ANNOTATION_PROCESSORS += room-compiler
LOCAL_ANNOTATION_PROCESSORS += room-migration
LOCAL_ANNOTATION_PROCESSORS += s-antlr4         # a later version of antlr4 is already on the classpath, be we want this version
LOCAL_ANNOTATION_PROCESSORS += apache-commons-codec
LOCAL_ANNOTATION_PROCESSORS += auto-common
LOCAL_ANNOTATION_PROCESSORS += s-javapoet       #the name javapoet is already defined - prefix for uniqueness
LOCAL_ANNOTATION_PROCESSORS += kotlin-metadata
LOCAL_ANNOTATION_PROCESSORS += sqlite-jdbc
LOCAL_ANNOTATION_PROCESSORS += jetbrain-annotations
LOCAL_ANNOTATION_PROCESSORS += guava-21.0
LOCAL_ANNOTATION_PROCESSORS += kotlin-stdlib

LOCAL_ANNOTATION_PROCESSOR_CLASSES := androidx.room.RoomProcessor


...

include $(BUILD_PACKAGE)

我还添加了一个新模块：

#These libraries get copied into out/host/common/obj/JAVA_LIBRARIES/
# and are required for annotation processing
include $(CLEAR_VARS)

LOCAL_LIBS_PATH := libs
COMMON_LIBS_PATH := ../../../prebuilts/tools/common/m2/repository

LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := \
        annotation:$(LOCAL_LIBS_PATH)/annotation-1.0.0-beta01.jar \
        room-common:$(LOCAL_LIBS_PATH)/room-common-2.0.0-beta01.jar \
        room-compiler:$(LOCAL_LIBS_PATH)/room-compiler-2.0.0-beta01.jar \
        room-migration:$(LOCAL_LIBS_PATH)/room-migration-2.0.0-beta01.jar \
        s-antlr4:$(COMMON_LIBS_PATH)/org/antlr/antlr4/4.5.3/antlr4-4.5.3.jar \
        apache-commons-codec:$(COMMON_LIBS_PATH)/org/eclipse/tycho/tycho-bundles-external/0.18.1/eclipse/plugins/org.apache.commons.codec_1.4.0.v201209201156.jar \
        auto-common:$(COMMON_LIBS_PATH)/com/google/auto/auto-common/0.9/auto-common-0.9.jar \
        s-javapoet:$(COMMON_LIBS_PATH)/com/squareup/javapoet/1.8.0/javapoet-1.8.0.jar \
        jetbrain-annotations:$(COMMON_LIBS_PATH)/org/jetbrains/annotations/13.0/annotations-13.0.jar \
        kotlin-metadata:$(COMMON_LIBS_PATH)/me/eugeniomarletti/kotlin-metadata/1.2.1/kotlin-metadata-1.2.1.jar \
        sqlite-jdbc:$(COMMON_LIBS_PATH)/org/xerial/sqlite-jdbc/3.20.1/sqlite-jdbc-3.20.1.jar
include $(BUILD_HOST_PREBUILT)

我坚持使用设备上蓝牙使用的库版本 - 一旦开始升级库，我就遇到了依赖冲突。