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Jni build with Android studio error: Library '/system/lib/libhoudini.so' not found

Because some reason, I have to generate some text from C. So, I wrote some C method for that purpose. I build the Jni with Android studio, and it seem work fine with my 5.1.0 Genymotion emulator.
But when I run the build on 4.1.1 emulator, I got this issue :
Caused by: java.lang.UnsatisfiedLinkError: Cannot load library: load_library[1098]: Library '/system/lib/libhoudini.so' not found
at java.lang.Runtime.loadLibrary(Runtime.java:370)
at java.lang.System.loadLibrary(System.java:535)
After researching. Maybe the problem is from building jni issue, that I haven't build the *.so file for x86. But when I decompile the apk, it seem that the *.so file already in "x86" folder.
Here is the android.mk file that I get from app's build folder :
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := ofx
LOCAL_LDFLAGS := -Wl,--build-id
LOCAL_SRC_FILES := \
xxx.../app/src/main/jni/key/Base64Util.c \
xxx.../app/src/main/jni/key/hidingutil.c \
LOCAL_C_INCLUDES += xxx.../app/src/main/jni
LOCAL_C_INCLUDES += xxx.../app/src/Beneficiary/jni
LOCAL_C_INCLUDES += xxx.../app/src/debug/jni
LOCAL_C_INCLUDES += xxx.../app/src/BeneficiaryDebug/jni
include $(BUILD_SHARED_LIBRARY)
Please help me make sure that the build will be fine to all devices, It will be very appreciated. I don't have many devices to take test on.
Thanks.

In your Android.mk file I don't see that you any prebuilt libs set as resources. This could help in the inclusion.
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := module_name
LOCAL_SRC_FILES := $(LOCAL_PATH)/prebuilt_lib_name.so
include $(PREBUILT_SHARED_LIBRARY)
Here is a Bash Script to help, add your ABI platforms in the APP_ABI area and change filepaths as necessary. No need to keep recompiling the whole thing altogether, but this will automate your native *.so builds and you can use gradle to do the rest:
ndk-build APP_ABI=armeabi-v7a NDK_LOG=true
if [ $? = 0 ]; then
rm -rf build/native-libs/
cd libs
for i in *
#rm -v */libofx.so
for arch in *
do
builddir=../build/native-libs/$arch
mkdir -p $builddir
cp -v $arch/*.so $builddir
done
fi

I found out the solution from this post.
It's because genymotion emulator need ARM translation library. You can download it from here. Hope it would help someone.

fatal error: fitz.h: No such file or directory in muPDF library

I m trying to compile the muPDF lib in eclipse for android app since 3 days without any success
I downloaded and configured the android-ndk, cygwin
Im getting this still
15:25:36 **** Build of configuration Debug for project ChoosePDFActivity ****
"E:\\android-ndk\\android-ndk-r9d\\ndk-build.cmd" all
Android NDK: WARNING:E:/Workspace_SIL/ChoosePDFActivity//jni/Android.mk:mupdfcore: LOCAL_LDLIBS is always ignored for static libraries
Android NDK: WARNING:E:/Workspace_SIL/ChoosePDFActivity//jni/Android.mk:mupdfcore: LOCAL_LDLIBS is always ignored for static libraries
[armeabi] Compile thumb : mupdf <= mupdf.c
E:/Workspace_SIL/ChoosePDFActivity//jni/mupdf.c:10:18: fatal error: fitz.h: No such file or directory
compilation terminated.
make.exe: *** [E:/Workspace_SIL/ChoosePDFActivity//obj/local/armeabi/objs-debug/mupdf/mupdf.o] Error 1
15:25:36 Build Finished (took 489ms)
jni/mupdf.c:10:18: fatal error: fitz.h: No such file or directory
where I can get this God Damn fitz.h and other header files
see this happens in my eclipse
included the following paths for my header files
setup android Ndk path like this
Update1
Here is my Android.mk file
LOCAL_PATH := $(call my-dir)
TOP_LOCAL_PATH := $(LOCAL_PATH)
MUPDF_ROOT := ..
include $(TOP_LOCAL_PATH)/Core.mk
include $(TOP_LOCAL_PATH)/ThirdParty.mk
include $(CLEAR_VARS)
LOCAL_C_INCLUDES := \
$(MUPDF_ROOT)/draw \
$(MUPDF_ROOT)/fitz \
$(MUPDF_ROOT)/pdf
LOCAL_CFLAGS :=
LOCAL_MODULE := mupdf
LOCAL_SRC_FILES := mupdf.c
LOCAL_STATIC_LIBRARIES := mupdfcore mupdfthirdparty
LOCAL_LDLIBS := -lm -llog -ljnigraphics
include $(BUILD_SHARED_LIBRARY)

Check the jni folder and find the Anroid.mk. Open it and check whether you added the LOCAL_SRC_FILES and LOCAL_C_INCLUDES. The LOCAL_C_INCLUDES should be your .h files' path. The LOCAL_SRC_FILES should be every .c or .cpp file's path.

cygwin no t install properly, follow following links and sure your installations correctly than run some commands according to below links.
For window 7
For window XP

You're also using an old version of the MuPDF source code.
1) Use the latest version (1.5 currently, or better, work from git).
2) Don't build it using eclipse, use the supported ndk/sdk based build as described in platform/android/ReadMe.txt. If you want to use eclipse, do so only after you have managed to build it in the supported way.
3) Do not skip step 10 of the instructions. Seriously, why does everyone try to skip step 10?
4) If you get stuck, come talk to us in the #ghostscript irc channel on freenode. A weblink can be found to this on mupdf.com

NDK compiling multiple libraries

I am using native code in my android app. Firstly I was only using one library. So everything worked fine. But now I have to integrate one more library into it. I've no idea what should be the ideal structure of the jni folder of my project (as in where to place the entire code, etc.). I found a work around. I created two folders inside jni .i.e library1 and library2. Again created a jni folder inside both the folders and placed respective code in the folders.
I got it to compile. Both .so files are being generated, but I am unable to use it in my application. I cant load the library using System.loadLibrary("library1.so"); Also tried providing full path. But failed
Also I have no idea what to write inside the parent jni folder's Android.mk file.
Current structure:
project_folder -> jni -> library1 -> jni -> "source code" an Android.mk is written here
project_folder -> jni -> library2 -> jni -> "source code" an Android.mk is written here
UPDATE #1 :
Gdbserver : [arm-linux-androideabi-4.6] libs/armeabi/gdbserver
Gdbsetup : libs/armeabi/gdb.setup
make: *** No rule to make target `jni/zap/jni/zap/zap/error.c', needed by `obj/local/armeabi/objs-debug/zap/jni/zap/zap/error.o'. Stop.
I am not using Application.mk.
This is my Android.mk:
TOP_PATH := $(call my-dir)
# Build library 1
include $(CLEAR_VARS)
LOCAL_PATH := $(TOP_PATH)/zap
LOCAL_MODULE := zap
LOCAL_C_INCLUDES := $(LOCAL_PATH)/zap
LOCAL_SRC_FILES := $(LOCAL_PATH)/zap/error.c \
$(LOCAL_PATH)/zap/hello-jni.c \
$(LOCAL_PATH)/zap/zap.c \
$(LOCAL_PATH)/zap/zapd.c \
$(LOCAL_PATH)/zap/zaplib.c
include $(BUILD_SHARED_LIBRARY)

The best structure I've found is to use the jni/ folder for ndk-build makefiles only, and keep the source outside in their own folders. This is easy to add to existing projects without restructuring your tree under jni.
However, you do have to be careful about how you handle the LOCAL_PATH variable and use of $(call my-dir). Here's a working example:
MyProject/
library1/
source1.cpp
library2/
source2.cpp
jni/
Android.mk
Application.mk
Android.mk:
# TOP_PATH refers to the project root dir (MyProject)
TOP_PATH := $(call my-dir)/..
# Build library 1
include $(CLEAR_VARS)
LOCAL_PATH := $(TOP_PATH)/library1
LOCAL_MODULE := library1
LOCAL_C_INCLUDES := $(LOCAL_PATH)
LOCAL_SRC_FILES := source1.cpp
include $(BUILD_SHARED_LIBRARY)
# Build library 2
include $(CLEAR_VARS)
LOCAL_PATH := $(TOP_PATH)/library2
LOCAL_MODULE := library2
LOCAL_C_INCLUDES := $(LOCAL_PATH)
LOCAL_SRC_FILES := source2.cpp
include $(BUILD_SHARED_LIBRARY)
You can optionally split out the sections in Android.mk to their own makefiles.

I discovered that when compiling from the command line, I can include multiple libraries by running android update project twice, once with each library:
android update project -l ../SDK/library1/ --path . --name $name --target 23 --subprojects
android update project -l ../SDK/library2/ --path . --name $name --target 23 --subprojects
ant release

"undefined reference to" (function) & "in archive is not an object" Android ndk-build

I'll expose my problem quickly. I am trying to port curl on Android and to use it within my app. I built the curl library with the ARM toolchain, configured and made (a couple times to make sure I didn't do nothing wrong the first time).
I then proceeded to put the newly created libcurl.a and my curljni.c into my jni folder, as long as the following Android.mk :
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE:= libcurl
LOCAL_SRC_FILES := libcurl.a
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include/curl
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := curljni
LOCAL_SRC_FILES := curljni.c
LOCAL_C_INCLUDES := $(LOCAL_PATH)/include/curl
LOCAL_STATIC_LIBRARIES := libcurl
include $(BUILD_SHARED_LIBRARY)
I've been trying a lot of things and I'm pretty sure it looks good now, but whenever I try to build with the ndk-build tool I obtain the following :
Note : curljni.c makes calls to functions within the libcurl library and its easy.h and curl.h files. They are then included in top of the file.
I also tried to ask for the whole library to get loaded into my Android app, using LOCAL_WHOLE_STATIC_LIBRARIES instead of LOCAL_STATIC_LIBRARIES, but without much more success :
Previously :
Downloaded curl.7.28.0
Made a standalone toolchain for ARM 4.6
Fixed several files within curl whose linebreaks were DOS like and needed Unix like (bug in configure) - one of which was depcomp, linked to libcurl_la-file.lo
./configure --host=arm-linux-androidaebi --with-zlib --enable-ipv6
make/make install
Added the resulting libcurl.a from curl\lib.libs

Ok,
Your Problem is that your library libcurl.a is not builded with Android ndk gcc ..
You have done :
$ ./configure --host=arm-linux-androidaebi --with-zlib --enable-ipv6
$ make
$ make install
this will generate a library using your PC gcc ..NOt good .
What i do is to configure open source library l for android using line command (or like you have done):
./configure --build=x86_64-unknown-linux-gnu --host=arm-linux-androideabi --target=arm-linux-androideabi
But then you schould not call make and make install ! .
You have to create an android.mk whinch will compile all source file in your libcurl + your jni file ' curljni.c' and put all in one lib : here an example of Android.mk compiling SQLITE3
###################################################
# SQLITE3
###################################################
include $(CLEAR_VARS)
LOCAL_MODULE := Mysqlite3
MY_LOCAL_SQLITE_SRC := $(LOCAL_PATH)/sqlite/
LOCAL_CPPFLAGS := -g
LOCAL_CPPFLAGS += -I $(MY_LOCAL_SQLITE_SRC)
LOCAL_EXPORT_C_INCLUDES:=$(MY_LOCAL_SQLITE_SRC)
FILE_LIST :=$(wildcard $(MY_LOCAL_SQLITE_SRC)*.c*)
LOCAL_SRC_FILES += $(FILE_LIST:$(LOCAL_PATH)/%=%)
# My SQLITE3 JNI FILE
LOCAL_SRC_FILES +=mysqlite_jni.cpp
# include native NDK library liblog and libz
LOCAL_LDLIBS := -llog -lz
include $(BUILD_SHARED_LIBRARY)

android NDK build issue

when I tried the NDK build command here is the error i got
D:\AndroidWorkSpace\cppTestProj>D:\android-ndk-r8b-windows\android-ndk-r8b\ndk-b
uild.cmd
Android NDK: WARNING: Unsupported source file extensions in jni/Android.mk for m
odule cppTestProj
Android NDK: LOCAL_SRC_FILES :=
"Compile++ thumb : cppTestProj <= maintestapp.cpp
jni/maintestapp.cpp:1:19: fatal error: iostream: No such file or directory
compilation terminated.
make: *** [obj/local/armeabi/objs/cppTestProj/maintestapp.o] Error 1
The JNI folder has the following files:
maintestapp.cpp
Test_array_type.cpp
Test_array_type.h
Could u pls let me know the issue. Im not using Cygwin for the same. Am I missing any files?
Here is the make file
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := cppTestProj
LOCAL_SRC_FILES := LOCAL_SRC_FILES := maintestapp.cpp \
Test_array_type.cpp
include $(BUILD_SHARED_LIBRARY)
here is the cpp file
#include<iostream>
#include"Test_array_type.h"
#include<stdio.h>
#include<conio.h>
using namespace std;
int main()
{
Test_array_type test_array;
Test_array_type *ptest_array1;
test_array.AddToList(10);
test_array.AddToList(20);
test_array.AddToList("Basha");
test_array.PrintList();
ptest_array1 = test_array.clonelist();
test_array.DeleteFromList(3);
test_array.AddToList(10);
test_array.AddToList(20);
test_array.AddToList(30);
test_array.AddToList(40);
test_array.AddToList(true);
test_array.AddToList("Java Beon APP");
test_array.PrintList();
ptest_array1->PrintList();
getch();
return true;
}

you should not run the 'ndk-build' command from your projects jni folder. To execute the Android.mk file run ndk-bild command within your root directory of project.
Your Android.mk should be look like this
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := cppTestProj
LOCAL_SRC_FILES := maintestapp.cpp \
Test_array_type.cpp
include $(BUILD_SHARED_LIBRARY)
Then run your ndk-build command
You can see this link for sample Android.mk file
Update:
static {
System.loadLibrary("hello-jni");
}
for more information please refer HelloJni.java file of sample project.
Thanks

you need to add LOCAL_C_INCLUDES and include your visual C++ include folders, since you are obviuosly working with it.