C++ Android Integration: JNI & NDK Guide

To call a C++ library in Android, you can achieve this by using JNI (Java Native Interface). Here are some simple steps:

1. Develop a C++ library that can be compiled using the Android NDK (Native Development Kit) to generate a .so file.
2. Utilize JNI interface in Java code of an Android application to load and call functions from a C++ library. Load the .so file with System.loadLibrary() method and declare the local method with the native keyword.
3. In a C++ library, you can access Java objects and call Java methods that are declared in the JNI interface through the JNIEnv object.
4. Compile and package the Android application, ensuring that the .so files are packaged together with the application so that the app can locate and load the C++ library.

By following these steps, you can successfully call functions from a C++ library in an Android application. It is important to pay attention to details such as memory management and type conversion in JNI development. You can refer to official documentation or tutorials to have a more in-depth understanding of how to use JNI effectively.