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POuse two library in the same JNI file
 

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  1. POuse two library in the same JNI file
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    <p>I'm using <strong>vuforia</strong> API to make an augmented reality application.Now I'm trying to integrate another library (<strong>opencv</strong>). I made changes in the <strong>android.mk</strong> file. But i still can't use opencv library and QCAR library in the same file .cpp I tried to access the java class to link between file which use QCAR and files which use OPENCV but this mapping is a time comsuming. I need to use the two library in the same file. this is my android.mk file:</p> <p>I edit the code as it was mentioned in the comments:</p> <pre><code>LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := QCAR-prebuilt LOCAL_SRC_FILES = ../../../build/lib/$(TARGET_ARCH_ABI)/libQCAR.so LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../../build/include include $(PREBUILT_SHARED_LIBRARY) include $(CLEAR_VARS) LOCAL_PRELINK_MODULE := false OPENCV_LIB_TYPE:=STATIC include $(LOCAL_PATH)/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/OpenCV.mk LOCAL_MODULE := ImageTargets USE_OPENGL_ES_1_1 := false ifeq ($(USE_OPENGL_ES_1_1), true) OPENGLES_LIB := -lGLESv1_CM OPENGLES_DEF := -DUSE_OPENGL_ES_1_1 else OPENGLES_LIB := -lGLESv2 OPENGLES_DEF := -DUSE_OPENGL_ES_2_0 endif LOCAL_CFLAGS := -Wno-write-strings -Wno-psabi $(OPENGLES_DEF) LOCAL_LDLIBS += \ -llog $(OPENGLES_LIB) LOCAL_SHARED_LIBRARIES += QCAR-prebuilt LOCAL_SRC_FILES := ImageTargets.cpp SampleUtils.cpp Texture.cpp SampleMath.cpp LOCAL_ARM_MODE := arm include $(BUILD_SHARED_LIBRARY) </code></pre> <p>mon fichier application.mk:</p> <pre><code>APP_ABI := armeabi armeabi-v7a APP_PLATFORM := android-8 APP_STL := gnustl_static APP_CPPFLAGS := -frtti -fexceptions </code></pre> <p>when i build the project without adding any opencv function in my ImageTargets.cpp i get this:</p> <pre><code>E:\android-ndk-r8\ndk-build.cmd all "Compile++ arm : ImageTargets &lt;= ImageTargets.cpp "Compile++ arm : ImageTargets &lt;= SampleUtils.cpp "Compile++ arm : ImageTargets &lt;= Texture.cpp "Compile++ arm : ImageTargets &lt;= SampleMath.cpp Prebuilt : libopencv_contrib.a &lt;= jni/../../../OpenCV-2.4.5-android- sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : libopencv_legacy.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : libopencv_ml.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : libopencv_stitching.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : libopencv_objdetect.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : libopencv_ts.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : libopencv_videostab.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : libopencv_calib3d.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : libopencv_photo.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : libopencv_video.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : libopencv_features2d.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : libopencv_highgui.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : libopencv_androidcamera.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : libopencv_flann.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : libopencv_imgproc.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : libopencv_core.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../libs/armeabi/ Prebuilt : liblibjpeg.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../3rdparty/libs/armeabi/ Prebuilt : liblibpng.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../3rdparty/libs/armeabi/ Prebuilt : liblibtiff.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../3rdparty/libs/armeabi/ Prebuilt : liblibjasper.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../3rdparty/libs/armeabi/ Prebuilt : libIlmImf.a &lt;= jni/../../../OpenCV-2.4.5-android-sdk/sdk/native/jni/../3rdparty/libs/armeabi/ SharedLibrary : libImageTargets.so Install : libImageTargets.so =&gt; libs/armeabi/libImageTargets.so Install : libQCAR.so =&gt; libs/armeabi/libQCAR.so "Compile++ arm : ImageTargets &lt;= ImageTargets.cpp "Compile++ arm : ImageTargets &lt;= SampleUtils.cpp "Compile++ arm : ImageTargets &lt;= Texture.cpp "Compile++ arm : ImageTargets &lt;= SampleMath.cpp SharedLibrary : libImageTargets.so Install : libImageTargets.so =&gt; libs/armeabi-v7a/libImageTargets.so Install : libQCAR.so =&gt; libs/armeabi-v7a/libQCAR.so </code></pre> <p>But when i add an <code>opencv</code> function in the ImageTargets.cpp(which already use <code>QCAR library</code>) i get :<code>E:/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/..‌​/lib/gcc/arm-linux-androideabi/4.4.3/../../../../arm-linux-androideabi/bin/ld.exe‌​: Warning: ./obj/local/armeabi/libopencv_core.a(array.cpp.o): Unknown EABI object attribute 44</code> Any ideas what am I doing wrong in this file? </p>
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    1. COYou did not post the build output for your project, so it's kinda hard to tell what is wrong with your Android.mk
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      1. POuse two library in the same JNI file
      1. USAlex Cohn
    2. COI added the build output to my question.thx
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      1. POuse two library in the same JNI file
      1. USDev DOS
    3. COFirst of all, use `ndk-build V=1` to disclose the actual link command (it's enough to delete `obj/local/armeabi/libImageRargets.so` and build). Also, I only see the opencv prebuilt libraries copied once, for __armeabi__; if the _undefined reference_ error happens only for __armeabi-v7a__, that would mean that OpenCV has a problem with that ABI. Do you find the libraries in `OpenCV-2.4.5-android-sdk/sdk/native/libs/armeabi-v7a`? Maybe, you can simply drop __armeabi-v7a__ from your __Application.mk__?
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      1. POuse two library in the same JNI file
      1. USAlex Cohn
 

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