利用源码编译Android系统的APK和可执行命令的方法

编译android系统apk
1、设置环境

export android_home=/home/administrator/soft/android
export path=$path:$android_home/out/host/linux-x86/bin
export android_product_out=$android_home/out/target/product/generic

2、创建项目

android create project -t 1 -k com.lhw.led -a mainactivity -p ./led
avd id: 1，it's get by command "android list"

project name: led
package: com.lhw.led 

main activity:mainactivity

project path: ./

接下来就是自己编写android程序了。

3、编写android.mk
android.mk需要放在项目根路径下，即led下,内容：

local_path       := $(call my-dir)

include $(clear_vars)
local_src_files     := $(call all-subdir-java-files)
local_package_name   := led 

local_java_libraries  := 
local_static_java_libraries :=

include $(build_package)

4、编译
在android源码目录下执行：

./build/envsetup.sh
mmm /home/administrator/workspace/android_test/led/

执行结果：

install: out/target/product/generic/system/app/led.apk

编译android系统可执行命令

android系统允许开发者，自己编写"ls"这样的命令放到android系统中。

1、编写c文件:mycmd.c

#include <stdio.h> 
 
int main(int argc, char **argv) 
{ 
  printf("this is my command!\n"); 
  return 0; 
} 

2、编写android.mk文件

local_path   := $(call my-dir) 
 
local_src_files := mycmd.c 
local_module  := mycmd 
local_module_tags := mycmd 
local_shared_libraries := libc 
local_static_libraries := 
 
include $(build_executable)  

3、编译

mmm /home/administrator/workspace/android_test/mycmd/

编译完成后信息：

 install: out/target/product/generic/system/bin/mycmd