Android：从 URL 下载返回的 Zip 文件

Question

如果我有一个 URL，当在网络浏览器中提交时，会弹出一个对话框来保存一个 zip 文件...我将如何在 android 中捕获和下载这个 zip 文件？

Answer 1

public void downloadFromUrl(String url, String outputFileName) {


    File dir = new File(Environment.getExternalStorageDirectory() + "/");
    if (dir.exists() == false) {
        dir.mkdirs();
    }
    try {
        URL downloadUrl = new URL(url); // you can write any link here

        File file = new File(dir, outputFileName);          
        /* Open a connection to that URL. */
        URLConnection ucon = downloadUrl.openConnection();

        /*
         * Define InputStreams to read from the URLConnection.
         */
        InputStream is = ucon.getInputStream();
        BufferedInputStream bis = new BufferedInputStream(is);

        /*
         * Read bytes to the Buffer until there is nothing more to read(-1).
         */
        ByteArrayBuffer baf = new ByteArrayBuffer(5000);
        int current = 0;
        while ((current = bis.read()) != -1) {
            baf.append((byte) current);
        }

        /* Convert the Bytes read to a String. */
        FileOutputStream fos = new FileOutputStream(file);          
        fos.write(baf.toByteArray());
        fos.flush();
        fos.close();




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


    }



}

Answer 2

使用DownloadManager 下载Url，虽然我不确定是否有任何重定向，但DownloadManager 会处理它。