由网友(猫与少年 °)分享简介：我工作的机器人，并尝试下载并在一个ImageView的显示来自网站图标（.ICO）。 I'm working on android and trying to download and display a favicon(.ICO) from a website on an ImageView. 到目前为止，我设法...

我工作的机器人，并尝试下载并在一个ImageView的显示来自网站图标（.ICO）。

I'm working on android and trying to download and display a favicon(.ICO) from a website on an ImageView.

到目前为止，我设法从使用HT​​TP连接一个网站读取。ICO，找回它作为一个InputStream。然后我用一个BitmapFactory脱code流成位图，并在ImageView的显示。这里的code：

So far I've manage to read the .ico from a website using an HTTP connection, retrieve it as an InputStream. Then I use a BitmapFactory to decode the stream into a Bitmap and display it on the ImageView. Here's the code:

 public Bitmap getBitmapFromURL(URL src) {           
        try {

            URL url = new URL("http", "www.google.com", "/favicon.ico");

            HttpURLConnection connection = (HttpURLConnection) url.openConnection();                

            connection.setDoInput(true);       

            connection.connect();               

            InputStream input = connection.getInputStream();    

            BitmapFactory.Options options = new BitmapFactory.Options();

            Bitmap myBitmap = BitmapFactory.decodeStream(input, null, options);  

            return myBitmap;

        } catch (IOException e) {               
            e.printStackTrace();                
            return null;                
        }
    }

的问题是，所述的InputStream的解码总是返回一个小16×16位图。如果我很好理解，一个.ico文件可以存储不同的图像分辨率，32×32像64×64和。我的问题是，有没有办法脱code中的32×32或64×64位图的16×16，而不是？

The problem is that the decoding of the inputStream always returns a small 16x16 Bitmap. If I well understood, a single .ICO file can store different image resolutions, like 32x32 and 64x64. My question is, is there a way to decode the 32x32 or the 64x64 Bitmap instead of the 16x16?

此外，如果没有与BitmapFactory的解决方案，是有图书馆或Java code做到这一点？

Also, if there isn't a solution with BitmapFactory, is there a library or java code to do this?

注意：我不想调整位图，我希望有一个32×32（或更大）的分辨率，不通过拉伸损失图像质量

NOTE: I don't want to resize the Bitmap, I want a 32x32(or bigger) resolution without losing the image quality by stretching.

先谢谢了。

推荐答案

该图标文件可能包含复式图标，通常是在16×16，一个在32×32。这是在下面的讨论主题：How有多个图标的大小，但在默认情况下只服务一个16x16？

The favicon file may contains mutliple icons, usually one in 16x16 and one in 32x32. This is discussed in the following thread : How to have multiple favicon sizes, yet serve only a 16x16 by default?

它与谷歌的favico的情况。如果您尝试下载的文件 www.google.com/favicon.ico ，并用它打开应用例如的IrfanView 上，您可以看到有两个图标（16×16到32×32）。

It is the case with the Google's favico. If you try to download the file www.google.com/favicon.ico and open it with an application like IrfanView, you can see that there are two icons (16x16 and 32x32).

要回答你的问题，你应该使用正确的库中提取多个图标，例如 image4j ，然后选择一个你需要的。

To answer your question, you should use a proper library to extract multiple icons, like image4j, and choose the one you need.

http://image4j.sourceforge.net/