Displaying OBJ files on Android for 3D model rendering can be achieved using various libraries and techniques. One popular approach is to use the OpenGL ES framework, which provides a powerful set of APIs for rendering 2D and 3D graphics. By leveraging OpenGL ES, developers can load OBJ files and render them on Android devices with smooth performance. Another option is to use third-party libraries such as Rajawali or ViroCore, which provide higher-level abstractions for 3D rendering, making it easier to display OBJ files on Android. These libraries often come with built-in support for loading and displaying OBJ files, as well as handling user interactions such as touch and gestures. Additionally, some game engines like Unity or Unreal Engine offer the ability to export 3D models as OBJ files, which can then be integrated into Android applications for immersive experiences. When displaying OBJ files on Android, it's important to consider factors such as device compatibility, performance optimization, and user experience. Developers should also ensure proper handling of memory and resources to avoid any potential issues with rendering large or complex 3D models. By following best practices and leveraging the right tools and libraries, developers can create compelling 3D experiences on Android devices using OBJ files.