Android NDK Samples

This repository contains sample apps that use the Android NDK.

For an explanation of the layout of this repository, see ARCHITECTURE.md.

Build and run

1. Clone the repository
2. Open the whole project in Android Studio
3. Select the sample you want to run in the top bar (you may need to sync gradle first)
4. Click the play button to run the sample

You can also build the samples from the command line if you prefer. Use ./gradlew build to build everything (if you're on Windows, use .\gradlew.bat instead of ./gradlew). For individual tasks, see ./gradlew tasks. To see the tasks for an individual sample, run the tasks task for that directory. For example, ./gradlew :camera:basic:tasks will show the tasks for the camera/basic app.

I just want something to copy from as a starting point

The samples in this repository are generally not a good starting point for a production quality app. They aim to demonstrate individual NDK APIs, but often make sacrifices to be succinct that make them unsuitable for a production app. This is gradually changing, but for now you should not do this.

Now in Android is an excellent resource for production quality apps in general, but does not touch on NDK- specific issues. https://github.com/DanAlbert/ndk-app-template can help some with that until this repository is able to.

You're most likely best served by using the New Project wizard in Android Studio to create a new app, then using those resources and the samples here as a reference. Android Studio's "Native C++" template is a good starting point for typical applications that need to use some C++ via JNI. The "Game Activity" template is a good starting point for game-like apps (that is, apps that do not use the Android UI, but instead render their own UI using OpenGL or Vulkan).

Additional documentation

• Add Native Code to Your Project
• Configure NDK for Android Studio/Gradle Plugin
• CMake for NDK

Support

If you've found an issue with a sample and you know how to fix it, please send us a PR!.

If you need to report a bug, where it needs to be filed depends on the type of issue:

• Problems with the samples themselves: https://github.com/googlesamples/android-ndk/issues
• Problems with the OS APIs: http://b.android.com (usually the Framework component)
• Problems with NDK (that is, the compiler): https://github.com/android/ndk/issues

For questions about using the NDK or the platform APIs, you can ask on:

• The NDK mailing list (best if you're not sure where else to ask)
• The Discussions tab of this repo (best for questions about the samples themselves)
• The NDK's Discussions (best for questions about the NDK compilers and build systems)
• Stack Overflow

Additional NDK samples:

• Google Play Game Samples with Android Studio
• Google Android Vulkan Tutorials
• Android Vulkan API Basic Samples
• Android High Performance Audio

License

Copyright 2018 The Android Open Source Project, Inc.

Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

LICENSE