使用Android下载管理器进行多文件下载

Question

我正在使用安卓下载管理器从网站上下载视频，并且已经成功完成下载后，需要对视频进行加密并删除。一切正常运作。但是问题在于：我开始下载一个文件，然后立即单击第二个链接，现在在第一个链接下载完成后，视频没有被加密，而第二个视频却成功加密了。

以下是代码：

dm = (DownloadManager) mContext.getSystemService(Context.DOWNLOAD_SERVICE);
request = new Request(Uri.parse(dataModel.getOtherData()));
File already=new   File(Environment.getExternalStorageDirectory()+"/Access/"+dataModel.getName()+".mp4");
if(!already.exists()){
down.setVisibility(View.GONE);
stp.setVisibility(View.VISIBLE);
request.setDestinationInExternalPublicDir("/vtemp", dataModel.getName()+".mp4");
enqueue = dm.enqueue(request);
}else {
Toast.makeText(mContext, "File Already Exists", Toast.LENGTH_LONG).show();
                }



BroadcastReceiver receiver = new BroadcastReceiver() {

@Override
public void onReceive(Context context, Intent intent) {

// downloadId =
// intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0);
// Log.v("dekid",""+downloadId);
String action = intent.getAction();
if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
    downloadId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
    // downloadId=dm.enqueue(request);
    Query query = new Query();
    query.setFilterById(enqueue);
    Cursor c = dm.query(query);
    if (c.moveToFirst()) {
        // downloadId=c.getColumnIndex(DownloadManager.COLUMN_ID);
        Log.v("downlad ID", "" + downloadId);
        int columnIndex = c.getColumnIndex(DownloadManager.COLUMN_STATUS);
        title=c.getString(c.getColumnIndex(DownloadManager.COLUMN_TITLE));
        Log.v("Video Name", ""+title);
        if (DownloadManager.STATUS_SUCCESSFUL == c.getInt(columnIndex)) {
            // request.setShowRunningNotification(false);
            Toast.makeText(context.getApplicationContext(),"Download Successful", Toast.LENGTH_LONG).show();
            String uriString = c.getString(c.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));
            //  Toast.makeText(context, "Download" + uriString,Toast.LENGTH_SHORT);
            Log.v("Encrypt", ""+uriString);     
            stp.setVisibility(View.GONE);
            down.setVisibility(View.VISIBLE);

            encryption task=new encryption();
            task.execute(title);

- Pandiri Deepak

Answer 1

这是因为当你在第一个链接下载完成之前点击了第二个链接时，你的enqueue变量将会获取第二个链接的下载ID。

我曾经遇到过类似的问题，并在这里解决了它。

- MAxeF