android-ndk | Installed android-ndk for speedy cloning | Android library

by urho3d C++ Version: r17b-strip License: No License

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kandi X-RAY | android-ndk Summary

android-ndk is a C++ library typically used in Mobile, Android applications.,roid-ndk has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

[Deprecated] Installed android-ndk for speedy cloning into Travis CI worker VM.

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Support

android-ndk has a low active ecosystem.

It has 45 star(s) with 69 fork(s). There are 8 watchers for this library.

It had no major release in the last 12 months.

android-ndk has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of android-ndk is r17b-strip

Quality

android-ndk has no bugs reported.

Security

android-ndk has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

android-ndk does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

android-ndk releases are available to install and integrate.

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android-ndk Key Features

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Community Discussions

Trending Discussions on android-ndk

OpenCV for Android via Visual Studio to Unity

Functions that differ only in their return type cannot be overloaded

What programs do we need to install for Android Studio?

w: Detected multiple Kotlin daemon sessions at build/kotlin/sessions

Cross compile to native android

OpenCV for Android self-compiled library 10x larger than official built

"ld: error: undefined symbol" when using "repeated" keyword in protobuf

Bazel host (x86 linux) linkopts propogating to target (android)

virtual box linix try to run buildozer

Buildozer fails to build apk

QUESTION

OpenCV for Android via Visual Studio to Unity

Asked 2021-Jun-10 at 16:27

I tried to compile a .so library using Visual Studio 2019 along with OpenCV Android in order to use this library in Unity. There are some answers on how to configure Visual Studio to use OpenCV Android (here or here) but none of these work for me. Below you can see my configurations.

Visual Studio 2019 (running on Windows 10)

android-ndk-r21e // also tried with android-ndk-r15c android-ndk-r16b and android-ndk-r17c

OpenCV Android 4.5.2 // also tried with OpenCV Android 4.0.0, 4.0.1 and 4.1.0

My settings in Visual Studio 2019 look as follows:

Configuration Properties

- General

Platform Toolset Clang 5.0 (also tried Clang 3.8 or GCC 4.9)
Configuration Type Dynamic Library (.so)
Target API Level Nougat 7.0 (android-24) (also tried different versions)
Use STL LLVM libc++ static library (c++_static) (also tried "GNU STL static library (gnustl_static)")

C/C++

- General

Additional Include Directories "Path to OpenCV_4_5_2_Android\sdk\native\jni\include"
Code Generation Enable C++ Exceptions "Yes(-fexceptions)"
Language C++17(-std=c++1z)
Precompiled Headers Not using Precompiled Headers

Linker

- General

Additional Library Directories Path to OpenCV_4_5_2_Android\sdk\native\libs\armeabi-v7a

- Input

Additional Dependencies Path to OpenCV_4_5_2_Android\sdk\native\libs\armeabi-v7a\libopencv_java4.so

My Source.cpp I try to compile is just a single function for testing purposes

...

ANSWER

Answered 2021-Jun-10 at 16:27

I had the exact same issue as you (though I used c++ 11) with the exact same setup, and struggled for days. I believe the errors you're seeing (like me) are from arm_neon.h. Very oddly, I was able to just build (not run) the .so successfully, even with those errors (I say "errors" because if you look at arm_neon.h, others pop up), so try it. Maybe it's some kind of IntelliJ/Intellisense mistake more than anything else where it's catching false negatives from some other toolchain setup.

At the same time, I'm not 100% sure I was always able to build with that issue, so try these steps as well if you can't:

use OpenCV 4.0.1 with Android NDK 16rb. The NDK matters when it comes to OpenCV builds, and this is the only supposed match that I know of.
follow this tutorial from scratch: https://amin-ahmadi.com/2019/06/03/how-to-use-opencv-in-unity-for-android/
if the downloaded OpenCV android SDK is still giving trouble, build OpenCV from the source using his other tutorial here: https://amin-ahmadi.com/2019/02/03/how-to-build-opencv-4-x-for-native-android-development/ and then repeat step 2.

MAJOR EDIT: OpenCV 4.5.2 needs to be treated differently because it no longer uses toolchains with gnu c++. -When you build OpenCV from CMake, build with Android NDK 21e, and do not use the toolchain in OpenCV 4.5.2. Use the one inside the Android NDK's build folder (android-ndk-r21e\build\cmake). -When you build your .so from Visual Studio 2019, do not use the GNU STL, use the LLVM. GNU c++ is no longer part of Android NDKs, and you need to cut it out of the process entirely. -In the Linker Input, put the names of your library files (or file, if it's just the world one) in the Library Dependencies field, not the Additional Dependencies field. -Everything else is the same as in those common tutorials.

Source https://stackoverflow.com/questions/67777653

QUESTION

Functions that differ only in their return type cannot be overloaded

Asked 2021-May-17 at 19:54

Note: Although question is duplicate, but current answers lacks details, so I wanted to post another one.

I'm using C++Builder developed by Embarcadero.

For Windows, it compiles fine.

For Android, it shows the following error:

...

ANSWER

Answered 2021-May-17 at 14:10

my bet is that you need to use "Preprocessor directives" in your code and indicate platforms

How do I check OS with a preprocessor directive?

https://www.cplusplus.com/doc/tutorial/preprocessor/

Source https://stackoverflow.com/questions/67570779

QUESTION

What programs do we need to install for Android Studio?

Asked 2021-May-10 at 17:14

I formatted my computer and have been trying to install Android Studio but have got many errors. When I tried to install SDKs', I got this error:

...

ANSWER

Answered 2021-May-10 at 17:14

Follow this tutorial to install Android Studio properly:

https://youtu.be/0zx_eFyHRU0

Source https://stackoverflow.com/questions/67474509

QUESTION

w: Detected multiple Kotlin daemon sessions at build/kotlin/sessions

Asked 2021-Apr-17 at 07:08

Performing ./gradlew assembleRelease and hit the issue of this. Below shows the entire error log...

...

ANSWER

Answered 2021-Apr-17 at 07:08

UNBELIEVABLE FIXED, seems to be a 63.x issue? As there's another person having this issue after upgrading from 62.2 to 63.3

The fixed was done as suggested here

Solved this issue by deleting the .gradle folder from /android and again run npm run android, and it solved this error.

Source https://stackoverflow.com/questions/67135414

QUESTION

Cross compile to native android

Asked 2021-Apr-03 at 20:21

How can I cross compile from my MacOS to Android native binary.

I read this, that I've to do:

...

ANSWER

Answered 2021-Apr-01 at 21:28

Not sure if this is correct or no, I tried the below and it worked with me the way I want. In my mac:

Source https://stackoverflow.com/questions/66910841

QUESTION

OpenCV for Android self-compiled library 10x larger than official built

Asked 2021-Mar-23 at 12:28

I try to build the OpenCV 4.5.1 SDK for Android because I need the SDK with contrib modules and the official release [1] only has the standard modules. But the libraries I build are almost 10x larger, for example: libopencv_core.a ==> 47.6 MB self compiled, 5.3 MB from the official repository (both for arm64-v8a)

Here is my cmake command, followed by ninja for compilation.

...

ANSWER

Answered 2021-Mar-23 at 12:28

I found the culprit:

Source https://stackoverflow.com/questions/66753930

QUESTION

"ld: error: undefined symbol" when using "repeated" keyword in protobuf

Asked 2021-Mar-12 at 11:15

After hours of debugging, I have the following minimalist .proto file:

...

ANSWER

Answered 2021-Mar-12 at 11:15

After days on the issue, the problem was related to the include files.

Because I am doing a cross compilation for Android, I haven't done the "make install" step. That makes no sens to install the package on my dev machine. Thus, I just grab the .a files from the compilation folder and the include files from the sources.

Here was my mistake !

The include files that I have to put with the compiled libraries are only a subset of all the files found on the src/include folder... sounds obvious afterwards...

Thus I had to specify a temporary CMAKE_INSTALL_PREFIX and run make install. Then grab the include folder from that location.

Then everything works as expected.

Source https://stackoverflow.com/questions/66581033

QUESTION

Bazel host (x86 linux) linkopts propogating to target (android)

Asked 2021-Mar-05 at 22:11

I have a bazel-based c++ project that has uses protos with the proto_library rule.

My .bazelrc has an android config that specifies an android config (following the example here) with

...

ANSWER

Answered 2021-Mar-05 at 22:11

I've resolved this problem. The issue here was not about host linkopts with protoc/protobuf, but with another library (gflags) that used -lpthread unconditionally. Adding the same android config and select statement used by protobuf fixed this issue (PR). The red herring about using a non-existent -lnotareallibrary was a linker error for protoc, not my target executable.

In case it's helpful to describe the debugging process, I searched the autogenerated bazel-myreponame/external directory's BUILD files and .bzl files for -lpthread. (At first, I only thought to search BUILD files, which missed this library)

Source https://stackoverflow.com/questions/66394377

QUESTION

virtual box linix try to run buildozer

Asked 2021-Feb-15 at 14:33

i have create an application in kivy with python and i would like it to run it to my phone.i use virtual box because i have window and is need Linux to run buildozer every time i run buildozer android debug i am facing an error. please if you can help me to solve that issue it will be very helpful thank here is the error i am facing:

...

ANSWER

Answered 2021-Feb-15 at 14:33

Looks like you are missing libssl-dev. Just open your terminal and run the command sudo apt install libssl-dev. You might have missed the buildozer dependencies. So even after installing libssl-dev you get error then try running the following command:

Source https://stackoverflow.com/questions/66206509

QUESTION

Buildozer fails to build apk

Asked 2021-Feb-13 at 11:05

I'm trying to build an apk out of a simple kivy python file however I get this error when using the command "buildozer -v android debug" to build the apk.

I'm running on a Ubuntu virtual machine, java jdk is version 8 something, I was using version 14 earlier, but saw some post talking about needing version 8. Not entirely sure though if it was for the same problem that I'm facing.

...

ANSWER

Answered 2021-Feb-13 at 11:05

You were missing libffi-dev earlier and now you are missing libssl-dev. Looks like you might be missing other requirements for buildozer too. Follow the steps given in buildozer documentation

Open your terminal and run following commands:

Source https://stackoverflow.com/questions/66179737

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

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Install android-ndk

You can download it from GitHub.

Support

NDK documentation, guides, and API reference are available on [our website](https://developer.android.com/ndk/index.html). NDK code samples are available on [GitHub](https://github.com/googlesamples/android-ndk). Information about Android Studio can be found on [the Android Studio website](https://developer.android.com/studio/index.html).

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