Download the NDK and Tools

https://developer.android.google.cn/ndk/downloads/

To compile and debug native code for your app, you need the following components:

• The Android Native Development Kit (NDK): a set of tools that allows you to use C and C++ code with Android.
• CMake: an external build tool that works alongside Gradle to build your native library. You do not need this component if you only plan to use ndk-build.
• LLDB: the debugger Android Studio uses to debug native code.

You can install these components using the SDK Manager:

1. From an open project, select Tools > Android > SDK Manager from the main menu.
2. Click the SDK Tools tab.
3. Check the boxes next to LLDB, CMake and NDK
4. Click Apply, and then click OK in the next dialog.
5. When the installation is complete, click Finish, and then click OK.