I am new to using NDK platform and I get the following error on running ndk-build in the terminal:
aditya#aditya-Vostro1510:~/workspace/Fibonacci$ ~/android-ndk-r9/ndk-build
Android NDK: WARNING: APP_PLATFORM android-18
is larger than android:minSdkVersion8 in ./AndroidManifest.xml
Android NDK: Your APP_BUILD_SCRIPT points to an unknown file: ./jni/Android.mk
/home/aditya/android-ndk-r9/build/core/add-application.mk:176: *** Android NDK: Aborting... . Stop.
I didnt make an application.mk file as I read it was optional and the video tutorial I refered did not include it too.
android.mk contains foll code:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := com_Native_fibonacci_fiblib.c
LOCAL_MODULE := com_Native_fibonacci_fiblib
include $(BUILD_SHARED_LIBRARY)
I tried searching for help on forums but failed.Please give me a detailed solution for this.
Related
I am trying to interface with an MSI SDR dongle, using an android app
This device is a clone of the SDRPlay SDR device, and is compatible with it's software and drivers
I am trying to interface with this using an OTG cable and android phone
The android drivers for this can be downloaded from here https://www.sdrplay.com/downloads/
It is in the Android tab under the API/HW – V2.11 (15TH NOV 2017) link (https://www.sdrplay.com/anddl.php)
A possible sample code for this driver can be found here: https://www.sdrplay.com/docs/AndroidIntegrationNote.pdf
Before making the full android program it says the library (libmir_sdr_api.a) should be built into an .so library file using ndk-build
I currently have Android's hello-jni sample project from here: https://github.com/android/ndk-samples/tree/android-mk/hello-jni
I have replaced the jni folder using the Android.mk file, libmir_sdr_api.a, mir_sdr.h, initialization-jni.cpp, demod-jni.cpp and demod-jni.h files mentioned in section 3 of the AndroidIntegrationNote.pdf file I linked above
When I execute ndk-build from the hello-jni project folder, I get he following error:
Android NDK: Found platform level in ./default.properties. Setting APP_PLATFORM to android-25.
Android NDK: android-25 is an alias for android-24. Adjusting APP_PLATFORM to match.
[arm64-v8a] Gdbserver : [aarch64-linux-android] libs/arm64-v8a/gdbserver
[arm64-v8a] Gdbsetup : libs/arm64-v8a/gdb.setup
[x86_64] Gdbserver : [x86_64-linux-android] libs/x86_64/gdbserver
[x86_64] Gdbsetup : libs/x86_64/gdb.setup
[armeabi-v7a] Gdbserver : [arm-linux-androideabi] libs/armeabi-v7a/gdbserver
[armeabi-v7a] Gdbsetup : libs/armeabi-v7a/gdb.setup
[x86] Gdbserver : [i686-linux-android] libs/x86/gdbserver
[x86] Gdbsetup : libs/x86/gdb.setup
make: *** No rule to make target 'jni/initialisation-jni.cpp', needed by 'obj/local/arm64-v8a/objs-debug/mirics-jni/initialisation-jni.o'. Stop.
I am used to compiling NDK code suing Android Studio and cmake so I am not sure what is going on here. I have not been able to link the .a file through cmake either so I thought of giving the driver manufacturer's sample code a try, but it not working either. Is the Android.mk file in pdf file linked earlier incomplete, or am I not building it correctly? These are the contents of the Android.mk file:
# $(call my-dir) returns the local directory which is the jni directory
LOCAL_PATH := $(call my-dir)
# libmir_sdr_api.a – this section creates a version of the Mirics API to be used below
include $(CLEAR_VARS)
LOCAL_MODULE := mir_sdr_api-prebuilt
LOCAL_SRC_FILES := libmir_sdr_api.a
LOCAL_EXPORT_C_INCLUDES := $(call my-dir)
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
# mirics-jni – this section uses the jni C++ source code to build the dynamic library
LOCAL_MODULE := mirics-jni
LOCAL_SRC_FILES := initialisation-jni.cpp demod-jni.cpp
LOCAL_C_INCLUDES := $(call my-dir)
LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib
LOCAL_STATIC_LIBRARIES := mir_sdr_api-prebuilt
include $(BUILD_SHARED_LIBRARY)
Regarding missing jni/initialisation-jni.cpp, you probably have the file jni/initialization-jni.cpp instead.
Also, unfortunately, the document is wrong. You can only use $(call my-dir) easily at the top of the file. Luckily, Android NDK adds the jni directory to includes path for you. Still, to be on the safe side, better write:
# $(call my-dir) returns the local directory which is the jni directory
LOCAL_PATH := $(call my-dir)
# libmir_sdr_api.a – this section creates a version of the Mirics API to be used below
include $(CLEAR_VARS)
LOCAL_MODULE := mir_sdr_api-prebuilt
LOCAL_SRC_FILES := libmir_sdr_api.a
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
# mirics-jni – this section uses the jni C++ source code to build the dynamic library
LOCAL_MODULE := mirics-jni
LOCAL_SRC_FILES := initialization-jni.cpp demod-jni.cpp
LOCAL_C_INCLUDES := $(LOCAL_PATH)
LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib
LOCAL_STATIC_LIBRARIES := mir_sdr_api-prebuilt
include $(BUILD_SHARED_LIBRARY)
Finally, pay attention to your build process. You only have one kind of the libmir_sdr_api.a static library, it's built for a 32-bit ARM CPU. Therefore you cannot build your libmirics-jni.so for other architectures. Add
APP_ABIS = armeabi-v7a
to your Application.mk file, or specify
abifilters = armeabi-v7a
in your build.gradle, if you build your library in Android Studio.
I'm new to this NDK build and I'm having trouble with running this Buildbox project in android studio.
After linking C++ to Gradle using ndk-build and syncing, it is giving this error.
Android NDK: C:\AndroidApps\app\app\src\main\jni\Android.mk: Cannot find module with tag 'box2D' in import path
Android NDK: Are you sure your NDK_MODULE_PATH variable is properly defined?
Android NDK: The following directories were searched:
Android NDK:
process_begin: CreateProcess(NULL, "", ...) failed.
I can see reference for cocos2dx in the java and resources subfolders.
I'm not sure if I have to download box2D,core,cocos2dx library .
What changes do I have to make to the android.mk file so that the errors are gone?
Here is the android.mk file
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := player_shared
LOCAL_MODULE_FILENAME := libplayer
LOCAL_SRC_FILES := main.cpp
LOCAL_WHOLE_STATIC_LIBRARIES := core_static cocos2dx_static box2d_static
GOOGLE_PLAY_STORE := true
include $(BUILD_SHARED_LIBRARY)
$(call import-add-path, $(LOCAL_PATH)/platform/third_party/android/prebuilt)
$(call import-module, box2D)
$(call import-module, core)
$(call import-module, cocos2dx)
NDK does not download imported modules for you. I am not sure if there are plans to add such feature (parallel to XCode pods) in the future.
You will find detailed description of import-module here, but basically you can set NDK_MODULE_PATH in your Application.mk file, with ; separators on Windows, but using straight / in paths instead of Windows native backsashes, e.g. C:/ext), and then
$(call import-module, box2D)
will be equivalent to
include C:/ext/box2D/Android.mk
I am trying to use android-ndk-profiler - https://github.com/richq/android-ndk-profiler
As described in the usage document https://github.com/richq/android-ndk-profiler/blob/master/docs/Usage.md
I unzipped the zip file to $HOME/Documents/Dev
My Android.mk looks like this
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := ndkbasics
LOCAL_SRC_FILES := ndkbasics.cpp
LOCAL_LDLIBS := -llog
# compile with profiling
LOCAL_CFLAGS := -pg
LOCAL_STATIC_LIBRARIES := android-ndk-profiler
include $(BUILD_SHARED_LIBRARY)
# at the end of Android.mk
$(call import-module,android-ndk-profiler)
When trying to build using the command
ndk-build NDK_MODULE_PATH=$HOME/Documents/Dev/
I get the error
Android NDK: /Users/hanantha/Documents/Dev/projects/workspaceWeeklyPreso/NdkProfileMethods/jni/Android.mk: Cannot find module with tag 'android-ndk-profiler' in import path
Android NDK: Are you sure your NDK_MODULE_PATH variable is properly defined ?
Android NDK: The following directories were searched:
Android NDK:
/Users/hanantha/Documents/Dev/projects/workspaceWeeklyPreso/NdkProfileMethods/jni/Android.mk:16: *** Android NDK: Aborting. . Stop.
Additional points
I have tried setting NDK_MODULE_PATH in my bash_profile
ndk version r10d
Ran the make file in the unzipped folder android-ndk-profiler
It is strange that ndk says the directories that it has searched is empty. What could be going wrong?
I think you have done almost correct process need to change at one place as follow
# at the end of Android.mk
$(call import-module,android-ndk-profiler/jni)
Adding jni in import-module will solve your problem because it's working for me.
I am getting following error after importing my existing project in eclipse.
* Android NDK: Aborting... . Stop.
external location: G:\Android_Setup\android-ndk-r9d-windows-x86\android-ndk-r9d\build\core\add-application.mk C/C++ Problem.
File System
http://i57.tinypic.com/2ps3p88.png
G:\AdroidApp\Meddiff --> Android codebase
Andriod.mk has
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := Meddiff
LOCAL_SRC_FILES := Meddiff.cpp
include $(BUILD_SHARED_LIBRARY)
Environment Variables
My Machine is 64 bit(windows 8.1)
APP_PROJECT_PATH = G:\AdroidApp\Meddiff
NDK_PROJECT_PATH = G:\Android_Setup\android-ndk-r9d-windows-x86\android-ndk-r9d
I am trying to create a module with the Android NDK, but I can't seem to get the build program to take the path variable. I have tried setting it as an environment variable in cygwin:
$ echo $NDK_MODULE_PATH
/cygdrive/c/dev/code/git/android_source
I also specify it within the Android.mk file:
#===================================
LOCAL_PATH:= $(call my-dir)
NDK_MODULE_PATH := $(LOCAL_PATH)/../../code/git/android_source/
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := user
LOCAL_MODULE := libFilters
LOCAL_SRC_FILES := SkewFilter.cpp SkewFilter.h
LOCAL_LDLIBS := -llog
LOCAL_EXPORT_LDLIBS := -lz
LOCAL_SHARED_LIBS := libskia
include $(BUILD_SHARED_LIBRARY)
#===================================
$(call import-module,libskia)
The end result is still this:
$ ndk-build
Android NDK: jni/Android.mk: Cannot find module with tag 'libskia' in import path
Android NDK: Are you sure your NDK_MODULE_PATH variable is properly defined ?
Android NDK: The following directories were searched:
Android NDK:
jni/Android.mk:17: *** Android NDK: Aborting. . Stop.
Anyone have any idea of what I'm doing wrong?
I found this question How to specify directory for NDK_MODULE_PATH but it wasn't any help.
I figured out what I was doing wrong. This line in the Android.mk file needs to change from:
$(call import-module,libskia)
to
$(call import-module,external/skia)
It doesn't do a recursive search for the module so when calling import-module it needs the full path relative to your NDK_MODULE_PATH (NDK_MODULE_PATH + path_to_module).
The error message that ndk-build prints seems to be wrong since it doesn't list any paths in the NDK_MODULE_PATH variable, but they are there and it uses them.
Hope this helps someone else.