Android翻页效果，电子书(16)

          }    
              
        // add drop shadow start test    
            if(mTimeStep<=29&&ex>2){    
            LinearGradient grad = new LinearGradient(    
                    ex,ey,ex+(dx-ex)/4,ey+(dy-ey)/4,R.color.gray3,Color.TRANSPARENT,Shader.TileMode.CLAMP);    
            Paint p=new Paint();    
            p.setShader(grad);    
//          p.setAlpha(120);    
            canvas.drawPath(this.mBackgroundPath,p);    
            //end test    
            }    
          canvas.restore();    
              
            
      }    
   
      private void drawBackPage(Canvas canvas) {    
          float width = this.mChildRect.right;    
          float height = this.mChildRect.bottom;    
          canvas.save();    
//        canvas.setDrawFilter(new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG|Paint.FILTER_BITMAP_FLAG));    
          canvas.clipPath(this.mBackPagePath, Region.Op.INTERSECT);    
          float xShift = 2.0F * this.mPivotX - width;    
          float xRotate = width - this.mPivotX;    
          float yRotate = height;    
          if ((this.mCorner & 0x1) != 0) {