NDK 예제 및 활용

1. NDK 디렉토리
• C:\apps\Brew_tools\apps\cygwin\home\Administrator\android-ndk-1.5_r1\apps\hello-jni\project\src\com\example\hellojni\
• APP(JAVA) 소스가 있음
• C:\apps\Brew_tools\apps\cygwin\home\Administrator\android-ndk-1.5_r1\sources\samples\hello-jni\
• Native(C) 소스가 있음
• C:\apps\Brew_tools\apps\cygwin\home\Administrator\android-ndk-1.5_r1\out\apps\hello-jni\android-1.5-arm\
• Build 후 생성되는 so(Shared Object)를 갖고 있음
  
2. 
   
   
   Build 하기
• 
  
  NDK 홈으로 이동
  
• cd ~/android-ndk-1.5_r1
  
• Build
  
• make APP=hello-jni
  
3. 
   
   NDK 활용
   
1. 
   
   Native Code 만들기(hello-jni 에서 복사)
   
• mkdir ~/android-ndk-1.5_r1/sources/samples/hi-jni/
  
• 
  
  cp -r ~/android-ndk-1.5_r1/sources/samples/hello-jni/* ~/android-ndk-1.5_r1/sources/samples/hi-jni/
  
• 
  
  mv ~/android-ndk-1.5_r1/sources/samples/hi-jni/hello-jni.c ~/android-ndk-1.5_r1/sources/samples/hi-jni/hi-jni.c
  
2. 
   
   Nitive Code Mk 파일 수정
   
• 
  
   vi ~/android-ndk-1.5_r1/sources/samples/hi-jni/Android.mk
  
• LOCAL_MODULE := hello-jni hi-jni
  
• LOCAL_SRC_FILES := hello-jni.c hi-jni.c
  
  
3. 
   
   Native Code 수정
   
• vi ~/android-ndk-1.5_r1/sources/samples/hi-jni/hi-jni.c
• jstring Java_com_example_hellojni_HelloJni_stringFromJNI( JNIEnv* env, jobject thiz )
• jstring Java_com_example_hijni_HelloJni_stringFromJNI( JNIEnv* env, jobject thiz )
• java 패키지명과 동일하게 설정.
  
4. APP 만들기(hi-jni 에서 복사)
• mkdir ~/android-ndk-1.5_r1/apps/hi-jni
• cp -r ~/android-ndk-1.5_r1/apps/hello-jni/* ~/android-ndk-1.5_r1/apps/hi-jni/
  
5. APP Mk 파일 수정(모듈명 변경)
• vi ~/android-ndk-1.5_r1/apps/hi-jni/Application.mk
• APP_MODULES := hello-jni hi-jni
  
6. Build
• cd ~/android-ndk-1.5_r1Build
• make APP=hi-jni