Java实现图片倒影的源码实例内容

把做工程过程常用的一些代码段做个记录，下面代码是关于java实现图片倒影的的代码，应该对大家有较大用处。

 

public class buttonimageactivity extends activity {
private imageview image_btn;
@override
public void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.main);
image_btn=(imageview)findviewbyid(r.id.image_btn);
bitmap bitmap =((bitmapdrawable)getresources().getdrawable(r.drawable.image_btn)).getbitmap();
image_btn.setimagebitmap(createreflectedimage(bitmap));
image_btn.setonclicklistener(new onclicklistener() {

public void onclick(view v) {

}
});
}
private bitmap createreflectedimage(bitmap originalbitmap) { 
final int reflectiongap = 4; 

int width = originalbitmap.getwidth(); 
int height = originalbitmap.getheight(); 

matrix matrix = new matrix(); 
matrix.prescale(1, -1); 
bitmap reflectionbitmap = bitmap.createbitmap(originalbitmap, 0, 
height / 2, width, height / 2, matrix, false); 
bitmap withreflectionbitmap = bitmap.createbitmap(width, (height 
+ height / 2 + reflectiongap), config.argb_8888); 

canvas canvas = new canvas(withreflectionbitmap); 
canvas.drawbitmap(originalbitmap, 0, 0, null); 

paint defaultpaint = new paint(); 
canvas.drawrect(0, height, width, height + reflectiongap, defaultpaint); 

canvas.drawbitmap(reflectionbitmap, 0, height + reflectiongap, null); 

paint paint = new paint(); 
lineargradient shader = new lineargradient(0, originalbitmap.getheight(), 
0, withreflectionbitmap.getheight(), 0x70ffffff, 0x00ffffff, 
tilemode.mirror); 
paint.setshader(shader); 
paint.setxfermode(new porterduffxfermode(mode.dst_in)); 

canvas.drawrect(0, height, width, withreflectionbitmap.getheight(), paint); 

return withreflectionbitmap; 
} 
} 

以上就是本次介绍的全部知识点内容，感谢大家对的支持。