In this series, we will create a finger-painting app for Android using touch interaction. The user will be able to select from a color palette, choose a brush size. Returns true if the device is a virtual input device rather. Get the latest Android developer news and tips that will help you. Stick War 2 Chaos Empire Game.
The Android framework offers a variety of graphics rendering APIs for 2D and 3D that interact with manufacturer implementations of graphics drivers, so it is important to have a good understanding of how those APIs work at a higher level. This page introduces the graphics hardware abstraction layer (HAL) upon which those drivers are built.
Application developers draw images to the screen in two ways: with Canvas or OpenGL. See for a detailed description of Android graphics components. Is a 2D graphics API and is the most popular graphics API among developers. Canvas operations draw all the stock and custom s in Android. In Android, hardware acceleration for Canvas APIs is accomplished with a drawing library called OpenGLRenderer that translates Canvas operations to OpenGL operations so they can execute on the GPU.
Beginning in Android 4.0, hardware-accelerated Canvas is enabled by default. Consequently, a hardware GPU that supports OpenGL ES 2.0 is mandatory for Android 4.0 and later devices. See the for an explanation of how the hardware-accelerated drawing path works and the differences in its behavior from that of the software drawing path.
In addition to Canvas, the other main way that developers render graphics is by using OpenGL ES to directly render to a surface. Android provides OpenGL ES interfaces in the package that developers can use to call into their GL implementations with the SDK or with native APIs provided in the. Android implementers can test OpenGL ES functionality using the, also known as deqp. Android graphics components No matter what rendering API developers use, everything is rendered onto a 'surface.' The surface represents the producer side of a buffer queue that is often consumed by SurfaceFlinger. Every window that is created on the Android platform is backed by a surface. All of the visible surfaces rendered are composited onto the display by SurfaceFlinger.
