我见过很多关于这个的问题,但都是 C#。它们都不是Java,我找不到合适的库。
哪个库可以通过给它一个字符串/哈希以编程方式为我做到这一点?这个算法实际上是在 StackExchange 上实现的。
你可以看看这个链接。有一个代码可用于生成您的标识http://www.davidhampgonsalves.com/Identicons
Java的代码如下:
public static BufferedImage generateIdenticons(String text, int image_width, int image_height){
int width = 5, height = 5;
byte[] hash = text.getBytes();
BufferedImage identicon = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
WritableRaster raster = identicon.getRaster();
int [] background = new int [] {255,255,255, 0};
int [] foreground = new int [] {hash[0] & 255, hash[1] & 255, hash[2] & 255, 255};
for(int x=0 ; x < width ; x++) {
//Enforce horizontal symmetry
int i = x < 3 ? x : 4 - x;
for(int y=0 ; y < height; y++) {
int [] pixelColor;
//toggle pixels based on bit being on/off
if((hash[i] >> y & 1) == 1)
pixelColor = foreground;
else
pixelColor = background;
raster.setPixel(x, y, pixelColor);
}
}
BufferedImage finalImage = new BufferedImage(image_width, image_height, BufferedImage.TYPE_INT_ARGB);
//Scale image to the size you want
AffineTransform at = new AffineTransform();
at.scale(image_width / width, image_height / height);
AffineTransformOp op = new AffineTransformOp(at, AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
finalImage = op.filter(identicon, finalImage);
return finalImage;
}
我解决了这个问题。
我使用了 Gravatar。我首先得到了图像的链接并将其存储为String
这样的:
String identiconURL = "http://www.gravatar.com/avatar/" + userID + "?s=55&d=identicon&r=PG";
然后,我使用了 Glide:
Glide.with(ProfilePictureChooserActivity.this)
.load(identiconURL)
.centerCrop()
.into(imageView);