Call native plug-in for Android code

The process to call code in native plug-ins for Android is the same as standard native plug-ins.

Note: If you use individual C/C++ source files as plug-ins, use __Internal as the plug-in name in the DllImport attribute.

It’s best practice to wrap all native plug-in method calls with an additional C# code layer that:

• Checks Application.platform and only calls native methods when the application is running on Android devices using the architecture that you compiled the native plug-in for. On other platforms and architectures, the additional C# code layer should return dummy values.
• Uses platform defines to control platform dependent code compilation and only compile code that uses the plug-in on platforms that have the plug-in available.

Sample package

The AndroidNativePlugin.unitypackage zip file contains a simple example of a native code plug-in distributed as a Unity package.

The sample shows how to invoke C++ code from a Unity application. The package includes a scene which displays the sum of two values as calculated by a native plug-in. To compile the plug-in, use Android NDK. For information on how to install Android NDK via the Unity Hub, see Android environment setup.

要安装该示例，请执行以下操作：

1. Download the zip file.
2. Extract the AndroidNativePlugin.unitypackage file.
3. In a Unity project, click Assets > Import Package > Custom Package.
4. In the Import Package file dialog, find and select the extracted AndroidNativePlugin.unitypackage file.