Fortschrittsdialog in findInBackground für syntaktische Analyse ohne Verwendung von Thread oder AsynchTaks

Question

Kann mir jemand sagen, wie ich den Fortschrittsdialog beim Abrufen von Daten aus der Parse-Datenbank anzeigen kann? Danke

public void fetch() { 

    ParseQuery<ParseObject> query = ParseQuery.getQuery("Phrase"); 
    try { 
     query.setLimit(1000); 

     progress_Dialog.setTitle("Parse Library Download"); 

     progress_Dialog.setMessage("Downloading Please wait...."); 

     progress_Dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); 

     progress_Dialog.show(); 

     query.findInBackground(new FindCallback<ParseObject>() { 
            @Override 
            public void done(List<ParseObject> greeting_list, ParseException e) { 

             parse_count = greeting_list.size(); 

             if (e == null) { 
              for (ParseObject obj : greeting_list) { 


               image_file = obj.getParseFile("image"); 

               try { 
                bmp = BitmapFactory.decodeByteArray(image_file.getData(), 0, image_file.getData().length); 

                bmp = getResizedBitmap(bmp, 500, 500); 

                ByteArrayOutputStream stream = new ByteArrayOutputStream(); 

                bmp.compress(Bitmap.CompressFormat.PNG, 100, stream); 

                image_array = stream.toByteArray(); 
               } catch (ParseException e1) { 
                e1.printStackTrace(); 
               } 

               audioFile = obj.getParseFile("audio"); 

               try { 
                counter = dBhelper.insert_TextData(obj.getString("english"), obj.getString("italian"), image_array, audioFile.getData(), obj.getString("category")); 

                System.out.println(counter); 

                progress_Dialog.setProgress(progressStatus); 

                progressStatus++; 


               } catch (ParseException e1) { 
                e1.printStackTrace(); 
               } 
              } 
              progress_Dialog.dismiss(); 

              System.out.println("ALL DATA FETCHED"); 

             } else { 

              Log.d("Error", "" + e.getMessage()); 
              e.printStackTrace(); 
             } 
            } 
           } 
     ); 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 
} 

Answer 1

Sie können eine ParseQuery verwenden, um diese Daten abzurufen. Lesen Sie Parse Android-Handbuch zur Verwendung von Queries

Mit Fortschrittsdialog Verwendung asyntask Prüfung unter Beispiel:

private class RemoteDataTask extends AsyncTask<Void, Void, Void> { 
    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     // Create a progressdialog 
     mProgressDialog = new ProgressDialog(MainActivity.this); 
     // Set progressdialog title 
     mProgressDialog.setTitle("Parse.com Custom ListView Tutorial"); 
     // Set progressdialog message 
     mProgressDialog.setMessage("Loading..."); 
     mProgressDialog.setIndeterminate(false); 
     // Show progressdialog 
     mProgressDialog.show(); 
    } 

    @Override 
    protected Void doInBackground(Void... params) { 
     // Create the array 
     worldpopulationlist = new ArrayList<WorldPopulation>(); 
     try { 
      // Locate the class table named "Country" in Parse.com 
      ParseQuery<ParseObject> query = new ParseQuery<ParseObject>(
        "Country"); 
      // Locate the column named "ranknum" in Parse.com and order list 
      // by ascending 
      query.orderByAscending("ranknum"); 
      ob = query.find(); 
      for (ParseObject country : ob) { 
       // Locate images in flag column 
       ParseFile image = (ParseFile) country.get("flag"); 

       WorldPopulation map = new WorldPopulation(); 
       map.setRank((String) country.get("rank")); 
       map.setCountry((String) country.get("country")); 
       map.setPopulation((String) country.get("population")); 
       map.setFlag(image.getUrl()); 
       worldpopulationlist.add(map); 
      } 
     } catch (ParseException e) { 
      Log.e("Error", e.getMessage()); 
      e.printStackTrace(); 
     } 
     return null; 
    } 

    @Override 
    protected void onPostExecute(Void result) { 
     // Locate the listview in listview_main.xml 
     listview = (ListView) findViewById(R.id.listview); 
     // Pass the results into ListViewAdapter.java 
     adapter = new ListViewAdapter(MainActivity.this, 
       worldpopulationlist); 
     // Binds the Adapter to the ListView 
     listview.setAdapter(adapter); 
     // Close the progressdialog 
     mProgressDialog.dismiss(); 
    } 
}