Could not build OpenCV Android sample project - android

I'm trying to build the OpenCV Android sample projects. I added the "OpenCV Library - 2.4.8" as a project to eclipse and trying to build "OpenCV Sample - 15 Puzzle" sample project. When I build the lsample project It gives me the following error.
make: *** Android NDK: Aborting...
It prints the following in the console.
**** Clean-only build of configuration Default for project OpenCV Sample - 15 puzzle ****
D:\ProgramFiles\android-ndk-r9c\ndk-build.cmd clean
Android NDK: WARNING: APP_PLATFORM android-19 is larger than android:minSdkVersion 14 in ./AndroidManifest.xml
D:/ProgramFiles/android-ndk-r9c/build/core/add-application.mk:187: *** Android NDK: Aborting... . Stop.
Android NDK: Your APP_BUILD_SCRIPT points to an unknown file: ./jni/Android.mk
In the imported sample project I do not have a Android.mk file. Do I have to include such a file in this sample project? Could somebody please help me to fix this issue? I'm using Windows 8, Eclipse Juno provided in ADT bundle and these are the OpenCV 2.4.8 sample projects.

You will have to create Android.mk and Application.mk file. Refer to tutorial-2-mixedprocessing which comes along with the samples.
I would suggest starting from the easiest sample code, ie, tutorial1.
The details of files that are to be compiled are present in Android.mk

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I tried using ndk-build, but I see the following error:
Android NDK: ERROR:Android.mk:corecrypto: LOCAL_SRC_FILES points to a missing file
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/Users/rajohns/Library/Android/sdk/ndk/21.0.6113669/build/core/prebuilt-library.mk:45: *** Android NDK: Aborting . Stop.
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I import .h files and I generated a app gradle file in android studio
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ANDROID NDK ERROR with OPENCV

I am new to android programming. Certain situations lead me directly to a project with real time image processing. I am trying to use OPENCV library, but eclipse shows the following error:
18:15:30 **** Build of configuration Default for project OpenCV Sample - 15 puzzle ****
"E:\\AND_NDK\\android-ndk-r10d\\ndk-build.cmd" all
Android NDK: WARNING: APP_PLATFORM android-15 is larger than android:minSdkVersion 8 in ./AndroidManifest.xml
Android NDK: LOCAL_MODULE definition in jni/Android.mk must not contain space
E:/AND_NDK/android-ndk-r10d/build/core/build-shared-library.mk:23: *** Android NDK: Please correct error. Aborting . Stop.
How could I solve this?
It seems you have spaces on jni/Android.mk, which seems to be incorrect. You should try removing those blank spaces.
You might want to take a look at the following question too: installing android OpenCV unable to locate error while building

setting Android NDK giving error : Your APP_BUILD_SCRIPT points to an unknown file

I'm running a sample application given in android-ndk, i have done basic settings like setting NDK Path at windows->preferences->android->NDK . Adding native support into project, included directories at c/c++ genereal-> paths and symbols -> includes but project is still showing error , if i clean the project it will generate error shown below . Any one knows what this errors means and what is the solution for this?
**** Clean-only build of configuration Default for project HelloJni ****
F:\android-ndk-r9-windows-x86\android-ndk-r9\ndk-build.cmd clean
Android NDK: Your APP_BUILD_SCRIPT points to an unknown file: ;F:\android-ndk-r9-windows-x86\android-ndk-r9/jni/Android.mk
F:/android-ndk-r9-windows-x86/android-ndk-r9/build/core/add-application.mk:176: *** Android NDK: Aborting... . Stop.
**** Build Finished ****
Seems like ndk-build looks for jni/Android.mk under NDK directory and it is clearly wrong. Before running ndk-build, you should change your directory to project directory. For ease of use, add NDK directory to Path in your environment variables first, then change your directory to project directory and run ndk-build then. Like (assuming NDK directory is added to environment variables):
cd F:\path\to\project
ndk-build

Error while Installing Android NDK

I downloaded andless project from below link
http://code.google.com/p/andless/downloads/list
i am trying to install ndk for running above application and during installation this error is occurred. Please give any solution for remove this error.
Android NDK: There is no Android.mk under apps/lossless/project/jni
Android NDK: If this is intentional please define APP_BUILD_SCRIPT to
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build/core/add-application.mk:143: * Android NDK: Aborting... .
Stop. iMac:android-ndk-r7$]1

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