android 自定义view

自定义的控件只需继承android的View，并实现 onDraw()方法即可，上代码：
                    publicclassGameViewextendsView{ 
            
            privatePaintpaint; 
            publicintangle=10; 
            publicintscale=1; 
            
            publicGameView(Contextcontext){ 
            super(context); 
            paint=newPaint(); 
            newThread(newMyThread()).start(); 
            } 
            
            publicGameView(Contextcontext,AttributeSetattrs){ 
            super(context,attrs); 
            paint=newPaint(); 
            newThread(newMyThread()).start(); 
            } 
            //重写onDraw方法 
            publicvoidonDraw(Canvascanvas){ 
            //设置画笔 
            paint.setColor(Color.RED); 
            paint.setStyle(Paint.Style.FILL); 
             
            //画一个矩形 
            canvas.drawColor(Color.YELLOW); 
            canvas.drawRect(50,5,90,25,paint); 
            
            //在画布上画一个旋转的文字 
            canvas.save();//先调用save 
            canvas.rotate(30);//旋转 
            paint.setColor(Color.BLACK); 
            canvas.drawText("tesdsfsdfsdfsdfsdfsdf",0,20,80,60,paint); 
            canvas.restore();//在调用restore，恢复 
            
            Bitmapbmp=BitmapFactory.decodeResource(getResources(),R.drawable.icon); 
            
            Matrixmatrix=newMatrix(); 
            
            matrix.setRotate(angle);//控制图片旋转 
            matrix.postScale(scale,scale);//控制图片缩放 
            
            Bitmapdstbmp=Bitmap.createBitmap(bmp,0,0,bmp.getWidth(), 
            
            bmp.getHeight(),matrix,true); 
            
            canvas.drawColor(Color.BLACK); 
            
            canvas.drawBitmap(dstbmp,10,10,null);} 
            
            classMyThreadimplementsRunnable{ 
            
            @Override
            publicvoidrun(){ 
            while(!Thread.currentThread().isInterrupted()){ 
            try{ 
            Thread.sleep(1000); 
            }catch(InterruptedExceptione){ 
            Thread.currentThread().interrupt(); 
            } 
            postInvalidate();//直接更新view 
            } 
            } 
            } 
            }
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