Wie kann ich auf den Prozentsatz des Android Download-Managers zugreifen?

Question

Ich verwende den Android-Download-Manager in meiner App. Wie kann ich auf den Fortschritt des Downloads (wie der Prozentsatz des Downloads in der Benachrichtigung) zugreifen, um diesen Prozentsatz in meiner Fortschrittsleiste innerhalb der Aktivität anzuzeigen?

Dies ist meine Methode, die die Datei herunterlädt:

//////////////////////////////////////////////////////////// 
//================== btn download set on click listner =========== 
//////////////////////////////////////////////////////////// 

holder.btnDownload.setOnClickListener(new View.OnClickListener() { 
    @Override 
    public void onClick(View v) { 

     dm = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE); 
     Uri downloadUri = Uri.parse(questionha.get(position).getQuestionDownLink()); 
     if (!Uri.EMPTY.equals(downloadUri)) { 

      Request request = new Request(downloadUri); 
      request.setTitle(questionha.get(position).getQuestionTitle()); 
      request.setDescription("Downloading ...."); 
      request.setDestinationInExternalFilesDir(v.getContext(), "downloaded", questionha.get(position).getQuestionDownFileName()); 
      enqueue = dm.enqueue(request); 
     }else { 
      Log.i("Download manager","Download manager url is null !"); 
     } 

    } 
}); 

Answer 1

Nachdem im Android Download Manager Doc Suche fand ich diese Lösung:

String urlDownload = "something"; 
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(urlDownload)); 

request.setDescription("This is Desc"); 
request.setTitle("download picsArt"); 
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "teste.zip"); 

final DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE); 

final long downloadId = manager.enqueue(request); 

final ProgressBar mProgressBar = (ProgressBar) findViewById(R.id.progressBar1); 

new Thread(new Runnable() { 

    @Override 
    public void run() { 

     boolean downloading = true; 

     while (downloading) { 

      DownloadManager.Query q = new DownloadManager.Query(); 
      q.setFilterById(downloadId); 

      Cursor cursor = manager.query(q); 
      cursor.moveToFirst(); 
      int bytes_downloaded = cursor.getInt(cursor 
        .getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR)); 
      int bytes_total = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES)); 

      if (cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS)) == DownloadManager.STATUS_SUCCESSFUL) { 
       downloading = false; 
      } 

      final int dl_progress = (int) ((bytes_downloaded * 100l)/bytes_total); 

      runOnUiThread(new Runnable() { 

       @Override 
       public void run() { 

        mProgressBar.setProgress((int) dl_progress); 

       } 
      }); 
      cursor.close(); 
     } 

    } 
}).start();