添加jar包或者aar库

在mk源码编译下，当aar做普通的jar包lib库用就可以了
Android.mk

LOCAL_PROGUARD_FLAG_FILES := proguard.flags
LOCAL_STATIC_JAVA_LIBRARIES := \
    android-ex-variablespeed \
    lmlibrary

.......

include $(CLEAR_VARS)
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := \
    lmlibrary:libs/lmlibrary-release.aar

include $(BUILD_MULTI_PREBUILT)

由于编译后会进行混淆，所以一般如果有proguard报错，需要在proguard文件中添加如下内容：

-libraryjars libs/lmlibrary-release.aar
-keep class  com.alibaba.fastjson.** { *;}
-dontwarn  com.alibaba.fastjson.**