指定したurlアドレスからファイルをダウンロードし、実測して使用できます.

中にはandroid studioが自動的に追加されているものもあり、実測が可能で、自分が使っている間にpublic class FileUrlDownloadUtil{

/**
 *   ：    URL            
 * @param urlPath
 *                
 * @param downloadDir
 *                  
 * @return       
 */
@SuppressWarnings("finally")
public static File downloadFile(String urlPath, String downloadDir) {
    File file = null;
    try {
        //     
        URL url = new URL(urlPath);
        //       ，   
        URLConnection urlConnection = url.openConnection();
        // http    
        HttpURLConnection httpURLConnection = (HttpURLConnection) urlConnection;
        //    
        httpURLConnection.setConnectTimeout(1000*5);
        //      ，   GET
        httpURLConnection.setRequestMethod("POST");
        //       
        httpURLConnection.setRequestProperty("Charset", "UTF-8");
        //      URL          （           ）。
        httpURLConnection.connect();
        //     
        int fileLength = httpURLConnection.getContentLength();

        //          
        System.out.println("          :" + fileLength / (1024 * 1024) + "MB");

        //             
        URLConnection con = url.openConnection();
        BufferedInputStream bin = new BufferedInputStream(httpURLConnection.getInputStream());
        //       (        )
         
        String fileFullName="";
        if(urlPath.contains("=")){
            fileFullName=urlPath.substring(urlPath.lastIndexOf("=")+1);
        }
         
        //       (        )
        String path = downloadDir + File.separatorChar + fileFullName;
        file = new File(path);
        //            ，          
        if (!file.getParentFile().exists()) {
            file.getParentFile().mkdirs();
        }

        OutputStream out = new FileOutputStream(file);
        int size = 0;
        int len = 0;
        byte[] buf = new byte[2048];
        while ((size = bin.read(buf)) != -1) {
            len += size;
            out.write(buf, 0, size);
            //                
            System.out.println("   -------> " + len * 100 / fileLength + "%
");
        }
        //     
        bin.close();
        out.close();
        System.out.println("      ！");
    } catch (MalformedURLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        System.out.println("      ！");
    } finally {
        return file;
    }

}