Android Studio 3.0.1 不会构建 NDK 静态库
Android Studio 3.0.1 Won't build NDK static library
我正在尝试构建静态库并将其包含在我的 Android Studio 项目中。我的项目在没有静态库的情况下构建并运行良好。
我的顶级 Android.mk 包括 2 个明确的 SQLite.mk 和 Hello.mk 行。
为了我自己的理智，我在所有这些 .mk 文件中指定了完整路径。
SQLite.mk如下：
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
JNILIB_PATH := C:/androidprojects/SDLTest_SQLite/app/jniLibs
SRC_SQLITE := C:/androidprojects/SDLTest_SQLite/app/jni/SQLite/sqlite3.c
LOCAL_CFLAGS += -Wno-write-strings
LOCAL_MODULE := SQLite
LOCAL_SRC_FILES := $(SRC_SQLITE)
TARGET_OUT=$(JNILIB_PATH)/$(TARGET_ARCH_ABI)
#TARGET_OUT=../jniLibs/$(TARGET_ARCH_ABI)
include $(BUILD_STATIC_LIBRARY)
AndroidStudio/Gradle错误如下：
Android NDK: ERROR:C:\androidprojects\SDLTest_SQLite\app\jni\Android.mk:SQLite: LOCAL_SRC_FILES points to a missing file
Android NDK: Check that C:/androidprojects/SDLTest_SQLite/app/jniLibs/armeabi/libSQLite.a exists or that its path is correct
Build command failed.
我的根本问题是我无法在任何地方生成 libSQLite.a 文件。我的 TARGET_OUT 线路有问题吗？
有人可以帮我生成静态库文件吗？
你不应该在 Android.mk 中设置 TARGET_OUT：这是打破微妙 ndk-build逻辑。您的两个 mk 文件相互矛盾：SQLite 不能同时从源代码预构建和构建。
我不知道为什么你的错误消息说缺少 SQLite 源，但你使用了不健康的完整路径。
下面是三个 mk 文件来完成它们的工作：
Android.mk
ROOT_PATH := $(call my-dir)
include $(ROOT_PATH)/src/Hello.mk
include $(ROOT_PATH)/SQLite/SQLite.mk
SQLite.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
SRC_SQLITE := sqlite3.c
LOCAL_CFLAGS += -Wno-write-strings
LOCAL_MODULE := SQLite
LOCAL_SRC_FILES := $(SRC_SQLITE)
include $(BUILD_STATIC_LIBRARY)
Hello.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := libSDL2
LOCAL_SRC_FILES := ../../jniLibs/SDL2-prebuilt/$(TARGET_ARCH_ABI)/libSDL2.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := main
SDL_PATH := $(LOCAL_PATH)/../../jniLibs/SDL2-prebuilt
LOCAL_C_INCLUDES := $(SDL_PATH)/include
# Add your application source files here...
LOCAL_SRC_FILES := 52_hello_mobile.cpp
LOCAL_STATIC_LIBRARIES := libSDL2 SQLite
LOCAL_LDLIBS := -lGLESv1_CM -lGLESv2 -llog
include $(BUILD_SHARED_LIBRARY)
后者还可以稍微改进一下：
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := libSDL2
LOCAL_SRC_FILES := ../../jniLibs/SDL2-prebuilt/$(TARGET_ARCH_ABI)/libSDL2.so
SDL_PATH := $(LOCAL_PATH)/../../jniLibs/SDL2-prebuilt
LOCAL_EXPORT_C_INCLUDES := $(SDL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := main
# Add your application source files here...
LOCAL_SRC_FILES := 52_hello_mobile.cpp
LOCAL_STATIC_LIBRARIES := libSDL2 SQLite
LOCAL_LDLIBS := -lGLESv1_CM -lGLESv2 -llog
include $(BUILD_SHARED_LIBRARY)
您的设置还有一个问题：您无法使用 APP_PLATFORM=14 构建 64 位版本。您应该至少使用 compileSdkVersion 21，并且不要明确设置 APP_PLATFORM。然后，gradle会自动根据minSdkVersion为32位目标（即android-14）设置APP_PLATFORM，推送到android-21 对于 64 位目标。
在Aplication.mk中，APP_PLATFORM设置被静默忽略。
我正在尝试构建静态库并将其包含在我的 Android Studio 项目中。我的项目在没有静态库的情况下构建并运行良好。
我的顶级 Android.mk 包括 2 个明确的 SQLite.mk 和 Hello.mk 行。
为了我自己的理智，我在所有这些 .mk 文件中指定了完整路径。
SQLite.mk如下：
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
JNILIB_PATH := C:/androidprojects/SDLTest_SQLite/app/jniLibs
SRC_SQLITE := C:/androidprojects/SDLTest_SQLite/app/jni/SQLite/sqlite3.c
LOCAL_CFLAGS += -Wno-write-strings
LOCAL_MODULE := SQLite
LOCAL_SRC_FILES := $(SRC_SQLITE)
TARGET_OUT=$(JNILIB_PATH)/$(TARGET_ARCH_ABI)
#TARGET_OUT=../jniLibs/$(TARGET_ARCH_ABI)
include $(BUILD_STATIC_LIBRARY)
AndroidStudio/Gradle错误如下：
Android NDK: ERROR:C:\androidprojects\SDLTest_SQLite\app\jni\Android.mk:SQLite: LOCAL_SRC_FILES points to a missing file
Android NDK: Check that C:/androidprojects/SDLTest_SQLite/app/jniLibs/armeabi/libSQLite.a exists or that its path is correct
Build command failed.
我的根本问题是我无法在任何地方生成 libSQLite.a 文件。我的 TARGET_OUT 线路有问题吗？
有人可以帮我生成静态库文件吗？
你不应该在 Android.mk 中设置 TARGET_OUT：这是打破微妙 ndk-build逻辑。您的两个 mk 文件相互矛盾：SQLite 不能同时从源代码预构建和构建。
我不知道为什么你的错误消息说缺少 SQLite 源，但你使用了不健康的完整路径。
下面是三个 mk 文件来完成它们的工作：
Android.mk
ROOT_PATH := $(call my-dir)
include $(ROOT_PATH)/src/Hello.mk
include $(ROOT_PATH)/SQLite/SQLite.mk
SQLite.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
SRC_SQLITE := sqlite3.c
LOCAL_CFLAGS += -Wno-write-strings
LOCAL_MODULE := SQLite
LOCAL_SRC_FILES := $(SRC_SQLITE)
include $(BUILD_STATIC_LIBRARY)
Hello.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := libSDL2
LOCAL_SRC_FILES := ../../jniLibs/SDL2-prebuilt/$(TARGET_ARCH_ABI)/libSDL2.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := main
SDL_PATH := $(LOCAL_PATH)/../../jniLibs/SDL2-prebuilt
LOCAL_C_INCLUDES := $(SDL_PATH)/include
# Add your application source files here...
LOCAL_SRC_FILES := 52_hello_mobile.cpp
LOCAL_STATIC_LIBRARIES := libSDL2 SQLite
LOCAL_LDLIBS := -lGLESv1_CM -lGLESv2 -llog
include $(BUILD_SHARED_LIBRARY)
后者还可以稍微改进一下：
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := libSDL2
LOCAL_SRC_FILES := ../../jniLibs/SDL2-prebuilt/$(TARGET_ARCH_ABI)/libSDL2.so
SDL_PATH := $(LOCAL_PATH)/../../jniLibs/SDL2-prebuilt
LOCAL_EXPORT_C_INCLUDES := $(SDL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := main
# Add your application source files here...
LOCAL_SRC_FILES := 52_hello_mobile.cpp
LOCAL_STATIC_LIBRARIES := libSDL2 SQLite
LOCAL_LDLIBS := -lGLESv1_CM -lGLESv2 -llog
include $(BUILD_SHARED_LIBRARY)
您的设置还有一个问题：您无法使用 APP_PLATFORM=14 构建 64 位版本。您应该至少使用 compileSdkVersion 21，并且不要明确设置 APP_PLATFORM。然后，gradle会自动根据minSdkVersion为32位目标（即android-14）设置APP_PLATFORM，推送到android-21 对于 64 位目标。
在Aplication.mk中，APP_PLATFORM设置被静默忽略。