title: Download a database file to the app directory
body: <p>i want to update the sqlite database of the app when clicking on a button using the DownloadManager.</p>
  
  <p>But it says "java.lang.IllegalArgumentException: Not a file URI: /data/user/0/com.example.laudien.listviewtesting/databases/Employees"</p>
  
  <p>What do i make wrong? Do i need a permission for that? The internet permission is already in the manifest.</p>
  
  <p>Here is the code of my updateDb() method:</p>
  
  <pre><code>private void updateDb() {
      DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE); // create download manager
      DownloadFinishedReceiver receiver = new DownloadFinishedReceiver(); // create broadcast receiver
      registerReceiver(receiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE)); // register the receiver
      DownloadManager.Request request = new DownloadManager.Request(Uri.parse(DATABASE_URL)); // create a download request
  
      // delete database file if it exists
      File databaseFile = new File(getDatabasePath(DATABASE_NAME).getAbsolutePath());
      if(databaseFile.exists())
          databaseFile.delete();
  
      request//.setNotificationVisibility(DownloadManager.Request.VISIBILITY_HIDDEN) // not visible
          .setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI) // only via wifi
          .setDestinationUri(Uri.parse("file:" + getDatabasePath(DATABASE_NAME).getAbsolutePath())); // set path in app dir
      downloadManager.enqueue(request); // enqueue the download request
  }
  </code></pre>