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

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: ./

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)

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

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

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

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)  

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

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