Eclipse NDK, NativeActivity project.
I ma trying to add a liquidfun(Box2D) library to my existing project. Unfortunately, no one in internet explain how to precisely do.
I'am stuck after building library using ndk (following this https://google.github.io/liquidfun/Building/html/md__building_android.html), and run sample project. I have totally no idea how to use it in my own project.
My Android.mk, i already using sfml.
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := sfml-example
PROJECT_FILES := $(wildcard $(LOCAL_PATH)/CPP/*.cpp)
PROJECT_FILES := $(PROJECT_FILES:$(LOCAL_PATH)/%=%)
LOCAL_SRC_FILES := main.cpp
LOCAL_SRC_FILES += $(PROJECT_FILES)
FILE_LIST := $(wildcard $(LOCAL_PATH)*.cpp)
LOCAL_SHARED_LIBRARIES := sfml-system
LOCAL_SHARED_LIBRARIES += sfml-window
LOCAL_SHARED_LIBRARIES += sfml-graphics
LOCAL_SHARED_LIBRARIES += sfml-audio
LOCAL_SHARED_LIBRARIES += sfml-network
LOCAL_WHOLE_STATIC_LIBRARIES := sfml-main
include $(BUILD_SHARED_LIBRARY)
$(call import-module,sfml)
Thanks in advance.
I have some prebuild libraries in my own project, and i include them like:
include $(CLEAR_VARS)
LOCAL_MODULE := libcurl
LOCAL_SRC_FILES := lib/$(TARGET_ARCH_ABI)/libcurl.a
LOCAL_STATIC_LIBRARIES := libcares libssl
LOCAL_EXPORT_LDLIBS := -lz
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/curl/include
include $(PREBUILT_STATIC_LIBRARY)
this is for prebuilt static library (with .a extension). If you would like to include shared, just change it to BUILD_SHARED_LIBRARY.
This file to include is inside MyProject/jni/lib/{arch} folder (with other libraries) and header files of library are put inside MyProject/jni/curl/include (just like it is visible in LOCAL_EXPORT_C_INCLUDES variable)
the names you pass to LOCAL_STATIC_LIBRARIES must be same as one that are declared in LOCAL_MODULE of other libraries/modules.
also everything you will probably need you can find in NDK docs that are in NDK folder. For prebuilt libraries there is separate section.
Related
I'm using ndk-build to build a set of shared library(.so) for my android project. I configured and made the source code of C++ library(gdal-2.2.2).
everything was ok.("./configure & make & make install" was successful).
So i created my jni folder like this documentation.
but when I'm trying to use ndk-build on windows, I get a lot of error like "Undefined refrence to somthing".
I've spent a lot of time on this project. Is there someone to help me?
Thanks.
Update
I used configure like this on ubuntu 16.04:
./configure --prefix=/home/mahdi/Desktop/build/ --with-spatialite=yes --with-spatialite-soname=libspatialite.so --host=i686-linux-android CXXFLAGS="-D_GLIBCXX_USE_CXX11_ABI=0" LIBS="-lsupc++ -lstdc++"
After make & make install step I created JNI. this is my directory.
jniwrap
jni
gdal
Android.mk
Application.mk
gdal_wrap.cpp
gdalconst_wrap.c
gnm_wrap.cpp
libgdal.a
ogr_wrap.cpp
osr_wrap.cpp
Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := gdal
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/gdal/include
LOCAL_SRC_FILES := libgdal.a
LOCAL_EXPORT_LDLIBS := -lz
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := gdaljni
LOCAL_SRC_FILES := gdal_wrap.cpp
LOCAL_STATIC_LIBRARIES := gdal
include $(BUILD_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := gdalconstjni
LOCAL_SRC_FILES := gdalconst_wrap.c
LOCAL_STATIC_LIBRARIES := gdal
include $(BUILD_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := ogrjni
LOCAL_SRC_FILES := ogr_wrap.cpp
LOCAL_STATIC_LIBRARIES := gdal
include $(BUILD_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := osrjni
LOCAL_SRC_FILES := osr_wrap.cpp
LOCAL_STATIC_LIBRARIES := gdal
include $(BUILD_SHARED_LIBRARY)
Aplication.mk
APP_STL := gnustl_shared
APP_CFLAGS := Android.mk
APP_ABI := x86
APP_PLATFORM := android-14
Then I used android-ndk-r16b in windows-x86_64 but I faced with these errors like this picture:
There was a lot of "undefined reference error" that i can't show here.
Note: for making gdal Java Binding I used swig and jdk7 on my ubuntu 16.04.
When you build libgdal.a on your ubuntu machine, you must have sqlite3, which resolves #include "sqlite3.h".
These include files are enough for a static library, but to create libgdaljni.so you also need libsqlite3.a. You can cross-compile it for Android it yourself on the same ubuntu machine, but it is probably OK to get prebuilt library e.g. from https://github.com/couchbase/couchbase-lite-java-native/tree/master/vendor/sqlite/libs/android.
Copy this file (for appropriate ABI) to the same directory, and modify your Android.mk accordingly:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := sqlite3
LOCAL_SRC_FILES := libsqlite3.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := gdal
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/gdal/include
LOCAL_SRC_FILES := libgdal.a
LOCAL_EXPORT_LDLIBS := -lz
LOCAL_STATIC_LIBRARIES := sqlite3
include $(PREBUILT_STATIC_LIBRARY)
*continued without changes*
If you still have "undefined reference error", this could mean that some other libraries should be added.
I created a static C++ library for testing. It only defines a class, MyLibrary, and the constructor MyLibrary::MyLibrary(). I built it in qtcreator, and got a libMyLibrary.a file, which is a prebuilt static library.
I would like to use this library in an Android project (using the NDK). In a working NDK test project, I therefore added a folder called inc at the same level as jni, in which I put libMyLibrary.a and its corresponding header mylibrary.h.
My Android.mk is as follows:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := MyLibrary
LOCAL_SRC_FILES := ../inc/libMyLibrary.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := helloJNI
LOCAL_SRC_FILES := mainActivity.cpp
LOCAL_C_INCLUDES += inc
LOCAL_STATIC_LIBRARIES := MyLibrary
LOCAL_LDLIBS := -llog
include $(BUILD_SHARED_LIBRARY)
The ndk-build command compiles without any error. But my static library is apparently not linked (i.e. it does not appear in obj/local/armeabi/objs).
I have tried to include it in my mainActivity.cpp file, but even though the header (mylibrary.h) is found, the library is not and I cannot create an object as in:
MyLibrary test = MyLibrary();
What am I doing wrong? I have read tens of similar questions on StackOverflow, but I still don't get it.
try to use this:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := helloJNI
LOCAL_SRC_FILES := mainActivity.cpp
LOCAL_C_INCLUDES := $(LOCAL_PATH)/inc/
LOCAL_LDLIBS := -llog -L$(LOCAL_PATH)/inc/ -lMyLibrary
include $(BUILD_SHARED_LIBRARY)
move libMyLibrary.a & mylibrary.h to jni/inc/libMyLibrary.a
I try to set up an Android NDK build based on CMake scripts, which dynamically create the required Android make files. While I can't use the JNI folder structure I split the build process in several separated make scripts:
1st Create root Android.mk file located in project root:
#ANDROID ROOT MAKEFILE
LOCAL_PATH := D:/binrev/repository/bar
include $(CLEAR_VARS)
MY_LOCAL_CFLAGS := -DDEBUG
include D:/binrev/repository/bar/src/Android.mk
2nd Create source Android.mk file in project source folder and perform module build:
$(info "[INFO] Source Makefile invoked")
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := bar
LOCAL_C_INCLUDES:= D:/binrev/repository/bar/include
LOCAL_SRC_FILES := bar.cpp
ifeq (debug,"debug")
MY_LOCAL_CFLAGS := -DDEBUG
endif
ifeq (false,true)
LOCAL_ARM_MODE := arm
endif
LOCAL_EXPORT_C_INCLUDES := D:/binrev/repository/bar/include
LOCAL_LDLIBS := -llog
LOCAL_LDLIBS += -landroid
LOCAL_STATIC_LIBRARIES += foo
ifeq (OFF, ON)
include $(BUILD_SHARED_LIBRARY)
else
include $(BUILD_STATIC_LIBRARY)
endif
Basicly this mechanism works and I could compile my sources, but I fail if I try to include a Prebuild of a library. I tried the following ways to include a pre-build
of a static library (with modified source/include definitions):
include $(CLEAR_VARS)
LOCAL_MODULE := foo
LOCAL_SRC_FILES := lib/android/$(TARGET_ARCH_ABI)/libfoo.a
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_STATIC_LIBRARY)
1st Prebuild definition in source Android.mk file
2nd Call import-module mechanism and add Prebuild Android.mk file to prebuild-lib
3rd Prebuild definition in root Android.mk file
[Edit:] Here is the snipped of the call-import test which also fail:
$(info "[INFO] Source Makefile invoked")
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := bar
LOCAL_C_INCLUDES:= D:/binrev/repository/bar/include
LOCAL_SRC_FILES := bar.cpp
ifeq (debug,"debug")
MY_LOCAL_CFLAGS := -DDEBUG
endif
ifeq (false,true)
LOCAL_ARM_MODE := arm
endif
LOCAL_EXPORT_C_INCLUDES := D:/binrev/repository/bar/include
LOCAL_LDLIBS := -llog
LOCAL_LDLIBS += -landroid
LOCAL_STATIC_LIBRARIES += foo
ifeq (ON, ON)
include $(BUILD_SHARED_LIBRARY)
else
include $(BUILD_STATIC_LIBRARY)
endif
$(call import-module, external-deps/foo)
In each case the Script with the prebuild-definition is invoked, but the prebuild
is not performed. When my NDK build has been compleded, the prebuild library and
objects are not copied to my obj folder. It seems to me that the prebuild is
completely ignored. But the path to prebuild sources are correct, otherwise the
compile fails with missing file error.
You could get the complete source of this test implementation here:
[Test projects][1]https://sourceforge.net/projects/binrevengine/files/publications/
Hint: The bar project is the project which tries to prebuild the foo project.
The foo project contains the prebuild sources.
The added tests projects could be build by your own using MinGW64 with GCC 4.7/4.8 in handshake with CMake and pre installed NDK (using r8e).
I completly get lost and running out of ideas ...
Thanks for any help.
The Android build system will not build a static library without it being used by a shared library. Just create a dummy shared library that has your static library as a dependency and voila:
include $(CLEAR_VARS)
LOCAL_MODULE := dummy
LOCAL_PATH := $(LOCAL_PATH)
LOCAL_SRC_FILES := dummy.c
LOCAL_STATIC_LIBRARIES := foo
include $(BUILD_SHARED_LIBRARY)
To exclude possible sources of defects I've reduced the Android make file to simplest case without using CMake generator of those files:
LOCAL_PATH := D:/binrev/repository/bar
include $(CLEAR_VARS)
LOCAL_MODULE := foo-prebuilt
LOCAL_SRC_FILES := external-deps/foo/lib/android/$(TARGET_ARCH_ABI)/libfoo.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := bar
LOCAL_C_INCLUDES:= D:/binrev/repository/bar/include
LOCAL_C_INCLUDES+= D:/binrev/repository/bar/external-deps/foo/include
LOCAL_SRC_FILES := src/bar.cpp
LOCAL_LDLIBS := -llog
LOCAL_LDLIBS += -landroid
LOCAL_SHARED_LIBRARIES := foo-prebuilt
include $(BUILD_SHARED_LIBRARY)
and:
LOCAL_PATH := D:/binrev/repository/foo
include $(CLEAR_VARS)
LOCAL_MODULE := foo
LOCAL_C_INCLUDES:= D:/binrev/repository/foo/include
LOCAL_SRC_FILES := src/foo.cpp
LOCAL_LDLIBS := -llog
LOCAL_LDLIBS += -landroid
include $(BUILD_STATIC_LIBRARY)
The failure still exists. The prebuild of the foo library is not executed. I also excluded MinGW64 as possible source of defect, if I try to build the project with Windows command line it results in same issue. The shared library is build, but the prebuild is not executed.
I checked my sources and scripts multiple times, but can't find any failure.
Any ideas what could be wrong or missing?
I am trying to include static cpp library in android. This library is already compiled(on mac os) and i have its include files.
Here is my Android.mk file
LOCAL_PATH := $(call my-dir)
include $(call all-subdir-makefiles)
include $(CLEAR_VARS)
LOCAL_MODULE:= utils
LOCAL_SRC_FILES:= libUtils.a
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/utils
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := sample
LOCAL_SRC_FILES := sample_cpp.cpp
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)
LOCAL_STATIC_LIBRARIES := utils
LOCAL_LDLIBS := -llog
include $(BUILD_SHARED_LIBRARY)
and here is Application.mk file
APP_STL := stlport_static
APP_CPPFLAGS = -fexceptions
but whenever it try to compile it using NDK i get the error
(Path of file)/libUtils.a: file not recognized: File format not recognized
collect2: ld returned 1 exit status
From the comments and so on it sounds like you trying to use a non arm version of the library. You should build the library with the ndk. The documentation has even documentation on how to do that.
For example building sigc++ could be like (from a project of mine, where sigc++ resides in the sigc++ subdirectory)
# SIGC++ Library built as static library
LOCAL_MODULE := sigc
LOCAL_PATH = $(CURRENT_DIR)
LOCAL_CPP_EXTENSION := .cc
LOCAL_SRC_FILES := sigc++/signal.cc sigc++/signal_base.cc sigc++/trackable.cc
LOCAL_SRC_FILES += sigc++/functors/slot_base.cc sigc++/adaptors/lambda/lambda.cc
LOCAL_SRC_FILES += sigc++/connection.cc sigc++/functors/slot.cc
LOCAL_C_INCLUDES := sigc++
include $(BUILD_STATIC_LIBRARY)
But you should really read how the compiling linking works. I am afraid building for android with ndk is more low level than using Xcode or Msvc.
I'm attempting to load the libjnigraphics.so prebuilt library to my project, however when I deploy the application, I am receiving this error:
06-17 22:35:28.741: INFO/dalvikvm(298): Unable to dlopen(/data/data/com.foo/lib/libndkfoo.so): Cannot load library: link_image[1721]: 29 could not load needed library 'libjnigraphics.so' for 'libndkfoo.so' (load_library[1051]: Library 'libjnigraphics.so' not found)
It compiles perfectly, fine.
Here's my Android.mk as well:
LOCAL_PATH := $(call my-dir)
# Add prebuilt libjnigraphics
include $(CLEAR_VARS)
LOCAL_MODULE := libjnigraphics
LOCAL_SRC_FILES := libjnigraphics.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
# Here we give our module name and source file(s)
LOCAL_MODULE := ndkfoo
LOCAL_SRC_FILES := ndkfoo.c
LOCAL_SHARED_LIBRARY := libjnigraphics
#LOCAL_LDLIBS += -libjnigraphics
LOCAL_LDLIBS += -llog
include $(BUILD_SHARED_LIBRARY)
Is there a special place I need to put the libjnigraphics.so? Right now I have it in the jni folder, however I've tried it in multiple other places and it still fails. Any help?
The device has to be running Foyo (Android 2.2, target platform android-8) to be able to use libjnigraphics.so. It doesn't matter what is in your SDK or project directories, this library is part of the device's system libraries.
You can compile your code using the NDK with android-8, but then it will give link-time errors when you side-load the apk and your device happens to be running 2.1 or earlier.
There's this SO question with a workaround, but it shouldn't be relied upon and will crash on some devices. Here's a post on the android-ndk group explaining the issues.
just try these changes:
LOCAL_PATH := $(call my-dir)
# Add prebuilt libjnigraphics
include $(CLEAR_VARS)
LOCAL_MODULE := graphics-prebuilt
LOCAL_SRC_FILES := libjnigraphics.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
# Here we give our module name and source file(s)
LOCAL_MODULE := ndkfoo
LOCAL_SRC_FILES := ndkfoo.c
LOCAL_SHARED_LIBRARY := graphics-prebuilt
LOCAL_LDLIBS += -llog
include $(BUILD_SHARED_LIBRARY)