Ask Your Question

Revision history [back]

click to hide/show revision 1
initial version

asked 2013-12-15 16:38:31 -0600

IZ73 gravatar image

Can't build OpenCV library and samples for Android: OpenCVEngineInterface and org.opencv.R

I have a bit of experience with Android development using Java. Now I want to try porting some C/C++ code that uses OpenCV to Android. First, I tried to build the OpenCV lib and samples for Android using Eclipse on a Win-7 64-bit machine.

I've installed Java 7 JDK, Cygwin, Eclipse, NDK and CDK (or at least I think I have). When I try building the project, I get these 2 errors:

  1. The import org.opencv.R cannot be resolved
  2. The import org.opencv.engine.OpenCVEngineInterface cannot be resolved

I noticed that there is a OpenCVEngineInterface.aidl file that is supposed to get converted to .java but I don't think it's happening

Also, when I try to do Android Tools -> Fix Project Properties, nothing happens: no window is opened etc. Maybe my dev environment is not set up correctly?

What should I do to get these resolved and to build the project?

Also, I do not currently have an actual Android device to test the code on. Can I run the samples in the emulator?

Thank you!

Can't build OpenCV library and samples for Android: OpenCVEngineInterface and org.opencv.R

I have a bit of experience with Android development using Java. Now I want to try porting some C/C++ code that uses OpenCV to Android. First, I tried to build the OpenCV lib and samples for Android using Eclipse on a Win-7 64-bit machine.

I've installed Java 7 JDK, Cygwin, Eclipse, NDK and CDK (or at least I think I have). When I try building the project, I get these 2 errors:

  1. The import org.opencv.R cannot be resolved
  2. The import org.opencv.engine.OpenCVEngineInterface cannot be resolved

I noticed that there is a OpenCVEngineInterface.aidl file that is supposed to get converted to .java but I don't think it's happening

Also, when I try to do Android Tools -> Fix Project Properties, nothing happens: no window is opened etc. Maybe my dev environment is not set up correctly?

What should I do to get these resolved and to build the project?

Also, I do not currently have an actual Android device to test the code on. Can I run the samples in the emulator?

Thank you!

click to hide/show revision 3
added build messages

updated 2013-12-16 06:26:25 -0600

Can't build OpenCV library and samples for Android: OpenCVEngineInterface and org.opencv.R

I have a bit of experience with Android development using Java. Now I want to try porting some C/C++ code that uses OpenCV to Android. First, I tried to build the OpenCV lib and samples for Android using Eclipse on a Win-7 64-bit machine.

I've installed Java 7 JDK, Cygwin, Eclipse, NDK and CDK (or at least I think I have). When I try building the project, I get these 2 errors:

  1. The import org.opencv.R cannot be resolved
  2. The import org.opencv.engine.OpenCVEngineInterface cannot be resolved

I noticed that there is a OpenCVEngineInterface.aidl file that is supposed to get converted to .java but I don't think it's happening

Also, when I try to do Android Tools -> Fix Project Properties, nothing happens: no window is opened etc. Maybe my dev environment is not set up correctly?

What should I do to get these resolved and to build the project?

Also, I do not currently have an actual Android device to test the code on. Can I run the samples in the emulator?

Thank you!

UPDATE: When I select Project -> Clean -> Clean all projects a window pops up with the message Cleaning all projects has encountered an error and Errors occurred during the build. Errors running builder 'Android Package Builder' on project 'OpenCV Library - 2.4.7.1'. Resource '/OpenCV Library - 2.4.7.1/bin' does not exist. Resource '/OpenCV Library - 2.4.7.1/bin' does not exist.

I created bin in my workspace\OpenCV Library - 2.4.7.1 but that did not help. After I proceed with the rebuild, I get this message in COnsole:

`07:20:13 * Auto Build of configuration Default for project OpenCV Tutorial 2 - Mixed Processing * "\ndk-build.cmd" Android NDK: WARNING:jni/Android.mk:mixed_sample: non-system libraries in linker flags: -lopencv_java
Android NDK: This is likely to result in incorrect builds. Try using LOCAL_STATIC_LIBRARIES
Android NDK: or LOCAL_SHARED_LIBRARIES instead to list the library dependencies of the
Android NDK: current module
[armeabi-v7a] Install : libmixed_sample.so => libs/armeabi-v7a/libmixed_sample.so

07:20:13 Build Finished (took 228ms)`

Copyright OpenCV foundation, 2012-2018. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.
about | faq | help | privacy policy | terms of service
Powered by Askbot version 0.10.2