Android NDK 構建共享庫：Android.mk 與 Application.mk 配置指南

目錄結構

jni/
  Android.mk
  Application.mk
  mylib/
    include/
    src/
    Android.mk

Application.mk (全局配置)

APP_OPTIM := release
APP_PLATFORM := android-21
APP_STL := c++_static
APP_CPPFLAGS := -frtti -fexceptions -DANDROID
APP_ABI := arm64-v8a armeabi-v7a x86 x86_64
APP_MODULES := mylib

模塊 Android.mk (mylib/Android.mk)

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := mylib
LOCAL_SRC_FILES := src/file1.cpp src/file2.cpp
LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(BUILD_SHARED_LIBRARY)

主 Android.mk (jni/Android.mk)

LOCAL_PATH := $(call my-dir)
include $(call all-subdir-makefiles)

構建命令

ndk-build NDK_PROJECT_PATH=. APP_BUILD_SCRIPT=./jni/Android.mk

關鍵點

• APP_STL 選 c++_static 避免多庫 STL 衝突。
• LOCAL_EXPORT_C_INCLUDES 讓依賴模塊自動獲取頭文件路徑。
• 靜態庫用 BUILD_STATIC_LIBRARY，動態庫用 BUILD_SHARED_LIBRARY。
• CMake (現代 NDK 推薦) 替代 mk 文件，語法更清晰，IDE 支持更好。