Android中从以下网址保存图像时只读的错误 [英] Read-Only error when saving image from URL in Android

问题描述

我试图从Web URL保存图像中的Andr​​oid应用程序但是当我运行它，日志猫抛出一个异常，并称其只读。我不知道怎么回事。

I am trying to save an image from a web URL in an android application however when I run it, the log cat throws an exception saying its "read only". I don't know whats going on.

下面是我的下载类：

  public class ImageDownload {

public static void downloader(String imageURL, String fileName) { 
        try {
                URL url = new URL("http://www.exampleurl.com/" + imageURL); 
                File file = new File(fileName);


                URLConnection con = url.openConnection();

                InputStream is = con.getInputStream();
                BufferedInputStream bis = new BufferedInputStream(is);

                ByteArrayBuffer baf = new ByteArrayBuffer(50);
                int current = 0;
                while ((current = bis.read()) != -1) {
                        baf.append((byte) current);
                }

                FileOutputStream fos = new FileOutputStream(file);
                fos.write(baf.toByteArray());
                fos.close();

        } catch (IOException e) {
                Log.d("Downloader", "Error: " + e);
        }

}
}

当我运行这一点，这是我从logcat中得到：

When I run this, this is what I get from the logcat:

DEBUG/Downloader(22112): Error: java.io.FileNotFoundException: /example.gif (Read-only file system)

任何帮助将是巨大的。谢谢你。

Any help would be great. Thank you.

推荐答案

尽量保存到/sdcard/example.gif

try saving to /sdcard/example.gif

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