从URL将音频文件下载到存储区并播放，并以代号1完成下载 [英] Download Audio File From Url To Storage And Play On Download Complete In Codename One

问题描述

我正在开发一个使用codenameone的应用程序，该应用程序需要从远程服务器下载音频文件（mp3）
，然后在下载完成后播放它。

I am developing an application using codenameone that needs to download an audio file (mp3) from a remote server, and then play it once the download is complete.

我希望它会在单击按钮后发生，但是到目前为止...我在模拟器中看到的只是无限对话框，而没有其他内容。

I want it to happen once a button is clicked, but so far...all i see in the simulator is the infinite dialog and nothing else.

我在开发PC上使用的是Java 7。

I am using java 7 on my development pc.

以下是相关的代码段：

          ok.addActionListener(new ActionListener() {

    public void actionPerformed(ActionEvent ae) {
        String file=_cat+".mp3";
        String path="/"+file;
        Util.downloadUrlToStorage("http://abcde.com/images/"+file,path,true);

       final InputStream is = Display.getInstance().getResourceAsStream(this.getClass(), path);
    try {
      Media  mm = MediaManager.createMedia(is, "audio/mp3");
        mm.play();
    } 
    catch (IOException ex) {
       ex.printStackTrace();
    }
    }
          });

如何完成音频文件的下载和播放？
我按照shai almog的答案编辑了以下代码：

How can i get to download the audio file and play it once it completes?. I edited my code in line with shai almog's answer, to the following:

          ok.addActionListener(new ActionListener() {

    public void actionPerformed(ActionEvent ae) {
               String file=_cat+".mp3";
        Util.downloadUrlToStorage("http://abcde.com/images/"+file,file,true);


        try {
            is = Storage.getInstance().createInputStream(file);
        } catch (IOException ex) {
           ex.printStackTrace();
        }
    try {
      Media  mm = MediaManager.createMedia(is, "audio/mp3");
        mm.play();
    } 
    catch (IOException ex) {
       ex.printStackTrace();
    }

....仍然没有下载.... i进入

....and still nothing gets downloaded....i go to the

         .CodenameOneStorage 

目录在我的PC上，但是没有。.我猜
i不见了

directory on my PC but nothing there..i guess i am missing something

推荐答案

getResourceAsStream 将流返回到jar中，并且是只读路径。它不是文件，您不能在此处写。存储是一种与此无关的简化文件系统。

getResourceAsStream returns a stream into a jar and is a read only path. Its not a "file" and you can't write there. Storage is a simplified file system that is unrelated to that either.

您可以使用类似以下内容的文件：

You can use something like:

Util.downloadUrlToStorage("http://abcde.com/images/"+file,file,true);
InputStream is = Storage.getInstance().createInputStream(file);

这篇关于从URL将音频文件下载到存储区并播放，并以代号1完成下载的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！