CODEWITHSUNDEEP
androidandroid-ndk
Johnny
Johnny

Reputation: 13

Android Studio ndk example build errors

I am new to using an ndk and was trying to use some of the sample projects that came in the android ndk10d folder. For example the hello-jni sample project. I keep getting this error:

Error:Execution failed for task ':app:compileDebugNdk'.
> com.android.ide.common.internal.LoggedErrorException: Failed to run command:
    C:\Users\Jonathon\android-ndk-r10d\ndk-build.cmd NDK_PROJECT_PATH=null APP_BUILD_SCRIPT=C:\Users\Jonathon\AndroidStudioProjects\hello-jni2\app\build\intermediates\ndk\debug\Android.mk APP_PLATFORM=android-21 NDK_OUT=C:\Users\Jonathon\AndroidStudioProjects\hello-jni2\app\build\intermediates\ndk\debug\obj NDK_LIBS_OUT=C:\Users\Jonathon\AndroidStudioProjects\hello-jni2\app\build\intermediates\ndk\debug\lib APP_ABI=all

Error Code: 2 Output:

make.exe: *** No rule to make target `C:\Users\Jonathon\AndroidStudioProjects\hello-jni2\app\build\intermediates\ndk\debug\obj/local/arm64-v8a/objs/hello-jni/C_\Users\Jonathon\AndroidStudioProjects\hello-jni2\app\src\main\jni', needed by `C:\Users\Jonathon\AndroidStudioProjects\hello-jni2\app\build\intermediates\ndk\debug\obj/local/arm64-v8a/objs/hello-jni/C_\Users\Jonathon\AndroidStudioProjects\hello-jni2\app\src\main\jni\hello-jni.o'.  Stop.

I have checked and the file: ndk-build.cmd is indeed in the location specified. When I try to open it command prompt says that it cannot find the application project directory. Please define the NDK_PROJECT_PATH variable to it

I re-installed and updated my whole environment from 0.8.9 to android studio 0.9.9 and now 1.01 and I get the same error. It seems it can't find the file or file directory and that must mean my configuration isn't right but I can't determine what to do to fix it.

local.properties

sdk.dir=C\:\\Users\\Jonathon\\AppData\\Local\\Android\\sdk
ndk.dir=C\:\\Users\\Jonathon\\android-ndk-r10d

Android.mk

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE    := hello-jni
LOCAL_SRC_FILES := hello-jni.c

include $(BUILD_SHARED_LIBRARY)

Upvotes: 1

Views: 6977

Answers (3)

user2946221
user2946221

Reputation: 21

If you have only one .c (or .cpp) file add a dummy .c (or .cpp) file and it works.

Upvotes: 1

G3M
G3M

Reputation: 1031

Check out this video for building simple NDK projects with Android studio https://www.youtube.com/watch?v=kFtxo7rr2HQ&list=UUkbLy9aj5IBXfS6WqLy5Qmw

Alternatively you can also download Intel Native Developer Experience tool that comes with the NDK plugin for Android Studio

Upvotes: 3

ph0b
ph0b

Reputation: 14473

You can remove the Android.mk file: it will be ignored as a new one is generated on the fly from your gradle configuration (build.gradle file). You can get more information on this from my article on NDK support in Android Studio.

The bug you're experiencing is this one: https://code.google.com/p/android/issues/detail?id=66937&

A simple workaround is to create a empty .c file next to hello-jni.c.

Upvotes: 2

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