When I start programming with OpenCV and Android NDK, I encountered an error with not found ‘jni’ folder in project which is critical to creation of application.
So I
found my own way to solve that problem.
First
of all you have to create a folder called 'jni'
Then you
have to create an external tool configuration to configure jni. To do that you
have to small arrow button external tool button in short cut bar.
Click the
down arrow and select ‘External tool configuration’, you will end up window
like below.
Press select Program and press new in upper corner which calls ‘New launch
configuration’
Provide any appropriate name you like for ‘Name’. In ‘Location’, you must give your ndk-build file. So for that first select ‘Browse File System’
And then browse to your android ndk folder and select ndk-build file
Then for
your ‘Working Directory’, you have to give your jni folder. So for that first
you select ‘Browse Workspace’
And select
your 'jni' folder in working project
Then press
’Run’. Sometimes this will display some error message ignore that message. Even
though we have create jni configuration but it still show the error that shows
in console in start because there is no file that ‘jni’ folder and we have to configure them.
So,
first thing we are going to do is create ‘Android.mk’. Go ahead and create ‘Android.mk’
file in jni folder.
Add something
like this code, if you want more about Android.mk file go to your android ndk
foler and there you will find folder called ‘docs’ in there you will able to
find HTML file call ANDROID-MK, in that document, you are able to find details
about your Android.mk file
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_LDLIBS := -llog
LOCAL_MODULE := ndksetup
LOCAL_SRC_FILES := native.cpp
include
$(BUILD_SHARED_LIBRARY)
But we
are not still finished. Then we are going to create our native.cpp without it console
shows a message like this
So to
fix this, we are creating file called ‘native.cpp’
In that
file you have to write your OpenCV codes according to your program. (Writing
code for native.cpp file is out of this post scope)
There is
an additional file called ‘Application.mk’ but it is optional file to create.
Eventually,
if you will see a message like this below in your console
Now, you
are up and running with android ndk in you android app.
OR 