Android:从 url 下载大图像文件(最多 2 mb)

Question

我想从 url 下载大图像文件，但是当我尝试解码输入流时，它抛出内存不足错误。图像文件大小约为 2mb。

如何下​​载大图文件并在图片 View 中显示？

Answer 1

看看这个 Download a file with Android, and showing the progress in a ProgressDialog

try {
        URL url = new URL("image download url");
        URLConnection connection = url.openConnection();
        connection.connect();
        // this will be useful so that you can show a typical 0-100% progress bar
        int fileLength = connection.getContentLength();

        // download the file
        InputStream input = new BufferedInputStream(url.openStream());
        OutputStream output = new FileOutputStream("/sdcard/image_name.extension");

        byte data[] = new byte[1024];
        long total = 0;
        int count;
        while ((count = input.read(data)) != -1) {
            total += count;
            // publishing the progress....                
            output.write(data, 0, count);
        }

        output.flush();
        output.close();
        input.close();
    } catch (Exception e) {
    }
    return null;

最好将其与 Asynctask 或线程一起使用