带aidl文件的应用程序在android平台源码中的编译

直接把带aidl文件的应用源码放到android平台package/apps/下面编译时会报错，在aidl中定义的接口类会找不到定义。需要在Android.mk文件中稍作修改,如代码中红色的地方所示。也就是aidl文件的路径需要指明。

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)

LOCAL_MODULE_TAGS := optional

LOCAL_SRC_FILES := $(call all-java-files-under,src) \
               src/com/demo/IMyService.aidl
LOCAL_PACKAGE_NAME := demo
LOCAL_MODULE_PATH := $(TARGET_OUT)/preloadapp

include $(BUILD_PACKAGE)

# Use the following include to make our test apk.
include $(call all-makefiles-under,$(LOCAL_PATH))