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我是一个相当新的开发人员。我正在使用 AndroidStudio 构建一个应用程序，该应用程序使用 PullParser 从服务器读取 XML 文件。我需要从 xml 链接下载一个 file.zip，当我按下 buttonDownload（在 listView 的原始布局内）时，它应该开始下载文件。这是我的 SitesAdapter 的行布局的代码。

public View getView(final int pos, final View convertView, final ViewGroup parent){
    RelativeLayout row = (RelativeLayout)convertView;
    Log.i("AtlantisSites", "getView pos = " + pos);
    //ViewHolder mainViewHolder = null;
    ViewHolder viewHolder;
    if(null == row){
//No recycled View, we have to inflate one.
        LayoutInflater inflater =(LayoutInflater)parent.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        row = (RelativeLayout)inflater.inflate(R.layout.row_site, null);

        viewHolder = new ViewHolder();
        viewHolder.btnDownload = (Button) row.findViewById(R.id.btnDownload);
        viewHolder.btnDownload.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Integer pos=(Integer)v.getTag();
                Log.i("AtlantisSites", "getView pos = " + pos);
                String url = getItem(pos).getLink();
                Intent i = new Intent(Intent.ACTION_VIEW);
                i.setData(Uri.parse(url));
            }
        });
row.setTag(viewHolder);
    } else{
        viewHolder = (ViewHolder) row.getTag();
    }
viewHolder.btnDetails.setTag(getItem(pos));

public class ViewHolder{
    Button btnDownload;
    Button btnDetails;
}

这是我应该调用 getLink() 来开始下载 file.zip 的类

public class DownloadZip {



public void DownloadFromUrlZip(){
    try {


        URL url = new URL (s);

        HttpURLConnection c = (HttpURLConnection)url.openConnection();
        c.setRequestMethod("GET");
        c.setDoOutput(true);
        c.connect();

        String Path = Environment.getExternalStorageDirectory() + "/download/";
        Log.v("AtlantisSites", "PATH: " + Path);
        File file = new File(Path);
        file.mkdirs();
        FileOutputStream fos = new FileOutputStream("AtlantisIssue.zip");

        InputStream is = c.getInputStream();

        byte[] buffer = new byte[1024];
        int len1 = 0;
        while ((len1 = is.read(buffer)) != -1) {
            fos.write(buffer, 0, len1);
        }
        fos.close();
        is.close();
    } catch (IOException e) {
        Log.d("AtlantisSites", "Error: " + e);
    }
    Log.v("AtlantisSites", "Check: ");

}

下载后我必须解压缩文件并将其保存在内部存储中。关键是我不知道如何调用 getLink() 来开始下载。我尝试了很多次和方法。我坚持下去。

拜托，任何帮助都会非常感激。

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1 回答 1

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 Intent i = new Intent(v.getContext(), DownloadZip.class);
 v.getContext().startActivity(i);

我在 ViewHolder 的按钮中写了这个。并创建一个方法 Download.class

于 2016-03-23T13:11:09.657 回答