Android翻页效果，电子书(18)

//                  ex,ey,bx,by,colors,null,Shader.TileMode.CLAMP);    
//          Paint p=new Paint();    
//          p.setShader(grad);    
//          p.setAlpha(120);    
//          canvas.drawPath(this.mBackPagePath,p);    
            LinearGradient grad = new LinearGradient(    
                    ex,ey,ex-(ex-bx)/4,ey-(ey-by)/4,R.color.gray3,0xC9C9C9,Shader.TileMode.CLAMP);    
            Paint p=new Paint();    
            p.setShader(grad);    
//          p.setAlpha(120);    
            canvas.drawPath(this.mBackPagePath,p);    
            canvas.restore();    
            //中间阴影问题，起点蓝色-》 白色-》 蓝色终点，这样起点前和终点后的区域也为蓝色了。    
            canvas.save();    
//          canvas.setDrawFilter(new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG|Paint.FILTER_BITMAP_FLAG));    
            LinearGradient grad1 = new LinearGradient(    
                    ex-(ex-bx)/4,ey-(ey-by)/4,bx,by,0xC9C9C9,R.color.gray3,Shader.TileMode.CLAMP);    
            Paint p1=new Paint();    
            p1.setShader(grad1);    
//          p1.setAlpha(120);    
            canvas.drawPath(this.mBackPagePath,p1);    
            canvas.restore();    
//