surfaceholder

Android games-Sudoku (2)> First, create a View class --> inherit SurfaceView and implement SurfaceHolder. callback interface --> SurfaceView. getHolder () obtains the SurfaceHolder object --> SurfaceHolder. addCallback (callback) adds a callback function --> SurfaceHolder. lockCanvas () Get the Canvas object and lock t

A drawing is made in the previous definition view. However, the drawing mechanism for view has the following drawbacks:1, view lacks double buffering mechanism.2. When the program needs to update the image on the view, the program must redraw the entire picture displayed on the view.3. The new thread cannot update the view component directly.Because the view has the above flaw. Therefore, in the game development generally uses the Surfaceview to draw, the Surfaceview usually will use with the

Parcelable interface, which embeds a surface that is specifically for drawing, Surfaceview can control the format and size of this surface, as well as where surface is drawn. It can be understood that surface is the place where data is managed, and Surfaceview is where the data is presented.Third, Surfaceholder Surfaceholder is an interface, similar to a surace listener. Monitor surface creation, destructi

Introduction Image data can be obtained directly from hardware interfaces such as memory or DMA, which is a very important drawing container. Its feature is that it can be drawn to the screen in a subthread. In this way, the main thread blocking can be avoided when the drawing task is heavy, thus improving the response speed of the program. Implementation Process Surfaceview is inherited to implement the surfaceview. Callback interface, and the method in the interface is used to manage the s

Mainactivity. Java Code Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> Package Com. Amaker. ch11.app; Import Java. Io. file; Import Java. Io. fileoutputstream; Import Java. Io. ioexception; Import Android. App. activity; Import Android. Graphics. pixelformat; Import Android. Hardware. camera; Import Android. OS. asynctask; Import Android. OS. Bundle; Import Android. OS. environment; Import Android. View. keyevent;

SurfaceView implements SurfaceHolder. callback {private SurfaceHolder mHolder; private Camera mCamera; public CameraPreview (Context context, Camera camera) {super (context); mCamera = camera; // Install a SurfaceHolder. callback so we get notified when the // underlying surface is created and destroyed. mHolder = getHolder (); mHolder. addCallback (this); // de

= "wrap_content"Android: text = "play"/>Android: id = "@ + id/pause_btn"Android: layout_width = "wrap_content"Android: layout_height = "wrap_content"Android: text = "paused"/>5. Compile MainActivity. java code.Package game. test;Import android. app. Activity;Import android. graphics. PixelFormat;Import android. media. AudioManager;Import android. media. MediaPlayer;Import android. OS. Bundle;Import android. view. SurfaceHolder;Import android. view. S

invalidate directly. In this case, this Touch and the next Touch take a longer time and will not be affected. 2. Actively update. For example, a person is always running. This requires a separate thread to repeatedly repaint the state of the person, to avoid blocking the main UI thread. Obviously, the view is not suitable and needs surfaceView for control. Double Buffering: Extracted from http://blog.csdn.net/tobacco5648/article/details/8261749 When updating a view, SurfaceView in Android ad

I. Overviewtoday to bring you a real case of Surfaceview, saying that the custom view is also a variety of writing, has not written surfaceview, what is this thing? When is it better to use it?Can see Surfaceview also inherited view, but we do not need to implement its draw method to draw themselves, why?Because it's a big difference from view, the view updates itself in the UI thread, while Surfaceview updates itself in a child thread, which also shows its advantages when making games and so on

This article explains how to use Surfaceview, which is designed to help you quickly get started with surfaceview development. Since the previous article "Android Development: Surfaceview basic Usage summary and development problem sharing " is poorly typeset, a separate introduction to Surfaceview's basic usage summary.Reprint Please specify author xiong_it and link: http://blog.csdn.net/xiong_it/article/details/45966309, thank you!Surfaceview Basic Introduction1, the system provides Surfaceview

; Copy code Player. java is the core of this article, player. java implements "progress bar Update", "data buffer", and "surfaceholder lifecycle". "surfaceholder lifecycle" is the biggest difference between video and audio playback (), surfacedestroyed (), surfacechanged () can create \ release some resources. Note the following: Java code: Videowidth = mediaplayer. getvideowidth (); Videoheight

* Author: blueeagle * Email: liujiaxiang@gmail.com */package COM. blueeagle; import android. app. activity; import android. graphics. pixelformat; import android. media. audiomanager; import android. media. mediaplayer; import android. OS. bundle; import android. view. surfaceholder; import android. view. surfaceview; import android. view. view; import android. view. view. onclicklistener; import android. widget. button; public class myvideo extends

SurfaceviewSurfaceview is a special subclass of view that is designed to provide another thread for drawing operations. Steps 1. Draw with Surfaceview, first create a class, inherit Surfaceview, and this class should implement Surfaceholder.callback interface .The three callback functions in this interface (surfacechanged (surfaceholder holder, int format, int width, int height), surfacecreated (Surf