What is SurfaceCreated in Android?
SurfaceCreated is a method used in Android to create a surface that displays graphics. It is part of the Android View Hierarchy, which is an essential part of every Android application. The View Hierarchy is a tree-like structure that contains all the user interface elements of an application, from the root view to its children. The SurfaceCreated method is called when the surface is created, and it provides a canvas of pixels that can be used to draw images or perform other graphics operations.
When is SurfaceCreated called?
The SurfaceCreated method is called when the View hierarchy is created, and it is ready to display graphics. This method is usually called when the app starts, and it creates the surface that will be used to display the user interface. The SurfaceCreated method can also be called when the app is resumed, and when the display size changes. When the SurfaceCreated method is called, the View tree is initialized, and the surface is ready to be drawn on.
What can be done with SurfaceCreated?
The SurfaceCreated method provides a canvas of pixels that can be used to perform graphics operations. This canvas can be used to draw images, shapes, and text on the surface. The canvas can also be used to animate images and create animations using a technique called double buffering. Double buffering is a graphics technique that involves creating two buffers, one for drawing the next frame, and the other for displaying the current frame. The SurfaceView provides a way for developers to use double buffering to create smooth animations on the surface.
Conclusion:
SurfaceCreated is a crucial method in the Android View Hierarchy, used to create a surface for displaying graphics. This method is called when the View hierarchy is created and initializes the surface for drawing graphics. The canvas created by the SurfaceCreated method can be used to draw images, shapes, and text on the surface, making it a powerful tool for creating custom user interfaces. By exploring the basics of SurfaceCreated, developers can create visually appealing, responsive, and intuitive user interfaces for Android applications.