默認所有代碼和文件在$project/jni下,否則特殊說明。
情況一:編譯靜態庫
文件Android.mk:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := hello-jni
LOCAL_SRC_FILES := hello-jni.c
include $(BUILD_STATIC_LIBRARY)
文件Application.mk: # 需要在application.mk 中加入模塊名(模塊列表,否則不能單獨生產靜態庫?!)
APP_MODULES :=hello-jni
情況二:編譯動態庫
文件Android.mk: #動態庫,只需要各自模塊中聲明模塊名即可,不是必須在application中加入模塊名(模塊列表)才能生成動態庫
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := hello-jni
LOCAL_SRC_FILES := hello-jni.c
include $(BUILD_SHARED_LIBRARY)
情況三:編譯動態庫+靜態庫
文件Android.mk:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := mylib_static
LOCAL_SRC_FILES := src.c
include $(BUILD_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := mylib_shared
LOCAL_SRC_FILES := src2.c
LOCAL_STATIC_LIBRARIES := mylib_static
include $(BUILD_SHARED_LIBRARY)
情況四:已有第三方靜態庫(動態庫),編譯靜態庫(動態庫)
文件Android.mk:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := thirdlib1 # name it whatever
LOCAL_SRC_FILES := $(TARGET_ARCH_ABI)/libthird1.a # or $(so_path)/libthird1.so
#LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_STATIC_LIBRARY) #or PREBUILT_SHARED_LIBRARY
include $(CLEAR_VARS)
LOCAL_MODULE := mylib_use_thirdlib
LOCAL_SRC_FILES := src.c
LOCAL_STATIC_LIBRARIES := thirdlib1 #or LOCAL_SHARED_LIBRARY
include $(BUILD_SHARED_LIBRARY) #如果編譯靜態庫,需要Application.mk
使用第三方的動態庫,靜態庫需要采用預編譯( BUILD_SHARED_LIBRARY 或 PREBUILT_STATIC_LIBRARY)
和 LOCAL_STATIC_LIBRARIES LOCAL_SHARED_LIBRARY 來igz加入制訂的動態庫或者是靜態庫
而如果使用的系統庫(靜態庫 / 動態庫 ) 采用如下即可實現: LOCAL_LDLIBS := -lm -llog -ljnigraphics -lz
二、ndk-gdb 調試方法
http://www.cnblogs.com/yaozhongxiao/archive/2012/03/13/2393959.html
1。 AndroidManifest.xml <application>包含android:debuggable = "true"
2。 執行ndk-build NDK_DEBUG=1
3 。 在java代碼調用c之前加一個斷點,然后在gdb命令行加b ***.c:main
斷點加入方法android.os.Debug.waitForDebugger();
4 。 執行ndk-gdb
ndk-gdb --start --force --verbose 顯示更多信息,用於查看步驟中哪里出錯。