Simple use of Surfaceview

1  PackageCom.example.administrator.mystudent.surfaceView;2 3 ImportAndroid.content.Context;4 ImportAndroid.graphics.Canvas;5 ImportAndroid.graphics.Color;6 ImportAndroid.graphics.Paint;7 ImportAndroid.graphics.Rect;8 ImportAndroid.util.AttributeSet;9 ImportAndroid.view.SurfaceHolder;Ten ImportAndroid.view.SurfaceView; One  A /** - * Created by Administrator on 2016/9/13. -  */ the  Public classTestsufaceviewextendsSurfaceviewImplementsSurfaceholder.callback { -  -     PrivateSurfaceholder Holder; -     PrivateMyThread MyThread; +  -      PublicTestsufaceview (Context context) { +         Super(Context,NULL); A     } at  -      PublicTestsufaceview (Context context, AttributeSet attrs) { -         Super(context, attrs); -  -Holder = This. Getholder (); -Holder.addcallback ( This); inMyThread =NewMyThread (holder);//create a drawing thread -  to     } +  -  the     /** *      * @paramHolder is fired when it is created and is typically called here to draw the thread $      */Panax Notoginseng @Override -      Public voidsurfacecreated (Surfaceholder holder) { the  +Mythread.isrun =true; A Mythread.start (); the     } +  -     /** $      * @paramHolder $      * @paramformat -      * @paramwidth -      * @paramheight fires when the size of your surface changes the      */ - @OverrideWuyi      Public voidSurfacechanged (Surfaceholder holder,intFormatintWidthintheight) { the  -     } Wu  -     /** About      * @paramholder fires when destroyed, typically where a drawing thread is stopped, released $      */ - @Override -      Public voidsurfacedestroyed (Surfaceholder holder) { -  AMythread.isrun =false; +     } the  -     //thread Inner class $     classMyThreadextendsThread { the         PrivateSurfaceholder Holder; the          Public BooleanIsrun; the  the          PublicMyThread (Surfaceholder holder) { -              This. Holder =Holder; inIsrun =true; the         } the  About @Override the          Public voidrun () { the             intCount = 0; the              while(isrun) { +Canvas C =NULL; -                 Try { the                     synchronized(Holder) {Bayic = Holder.lockcanvas ();//Lock the canvas, usually after it is locked, it can be drawn through canvas objects it returns, drawing on it, and so on.  theC.drawcolor (Color.Black);//set the canvas background color thePaint p =NewPaint ();//Create a brush - P.setcolor (color.white); -Rect r =NewRect (100, 50, 300, 250); the C.drawrect (R, p); theC.drawtext ("This is the first" + (count++) + "seconds", 100, 310, p); theThread.Sleep (1000);//sleep time is 1 seconds the                     } -                 } the                 Catch(Exception e) { the e.printstacktrace (); the}finally94                 { the                     if(c! =NULL) the                     { theHolder.unlockcanvasandpost (c);//end the lock drawing and commit the change. 98                         } About                     } -                 }101             }102 103     }104}

Simple use of Surfaceview