我正在使用Android下载管理器从网上下载视频，这已经成功完成，稍后在完成下载后视频将被加密，下载的视频应该被删除。一切正常。但问题是：
我开始下载文件，在完成第一个链接下载视频没有加密并且第二个视频加密成功后立即点击第二个链接。
这是代码
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);