android自己写的类似刻度尺的东西(5)

            } 
            canvas.drawColor(Color.WHITE); 
            Paint paint = new Paint();   
            paint.setAntiAlias(true);   
            paint.setColor(Color.GRAY); 
            canvas.drawBitmap(background, new Matrix(), paint); 
             
            switch(direction){ 
                case -1: 
                    POINTER_X -= MOVE; 
                    result -= interval; 
                    if(result <= 0){ 
                        result  = init_min; 
                        POINTER_X = INIT_POINTER_LEFT; 
                    }else{ 
                        if(POINTER_X < INIT_POINTER_LEFT){ 
                            POINTER_X = INIT_POINTER_RIGHT; 
                            result = init_min; 
                            init_min -= KEDU_COUNT * interval; 
                        } 
                    } 
                    break;