Android package so and jar

1.so：shared objects

1）编译java文件

   javac packagename.javaname

2) 生成jni 头文件

javah -jni packagename.classname

3)编写c文件：

4.下载ndk和cmake

5.)编写make脚本

cmake_minimum_required(VERSION 3.4.1)
add_library(
PowerOffAlarm
SHARED
src/main/jni/com_gtk_watch_poweroffalarm_PowerOffAlarm.c)
find_library(
log-lib
log)
target_link_libraries(
PowerOffAlarm
${log-lib})

6.)配置gradle

 

2.jar：java archive

jar -cvf  *.jar *.files{create,verse,file archive name}