How to pass data to AsyncTask Android?

Question

Android

Hello, I'm trying to send a message to AsyncTask, which stores the Bitmap. But for some reason null comes in AsyncTask. Please tell me what I'm doing wrong. Thanks in advance.

private synchronized void runRecognition(Message message){
        
        new RecognizeAsyncTack().execute(message);
      }
     
     private final class RecognizeAsyncTack extends AsyncTask<Message, Void, OcrDB>{

       @Override
      protected void onPreExecute() {

        super.onPreExecute();
        isRecognizing = true;
      }
       
      @Override
      protected OcrDB doInBackground(Message... params) {
        
        Message message = params[0];
        return decodeByteMessage((Bitmap) message.obj, message.arg1, message.arg2);
      }
      
      @Override
      protected void onPostExecute(OcrDB result) {
        super.onPostExecute(result);
        activity.setOcrResult(result);
        isRecognizing = false;
      }
       
     }

Answer 1

I solved the problem by replacing the object of type Message with my own class. Apparently something with Handler'om. Thanks

Answer 2

I tried debugging or logging, maybe you are losing it somewhere, so it comes as null?
Stuff checks and output to the logs, before each use, if you haven’t done so.