I'm trying to get the result of scanning the QR-code in the fragment, when using activity everything works, but after the transfer, the result is not obtained. How can this be fixed?

As I understood the problem in the "onActivityResult" method. Since the result is transmitted to the activation, and not to the fragment.

My code is below:

public class Fragment_qr extends Fragment implements View.OnClickListener { private Button btnScanQRCode; private TextView txtFruit, txtSize, txtColor; //QR Code Scanner Object private IntentIntegrator qrScan; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.qr_code_scan_layout, null); } @Override public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); DisplayMetrics metrics = this.getResources().getDisplayMetrics(); btnScanQRCode = (Button) view.findViewById(R.id.btnScanQRCode); txtFruit = (TextView) view.findViewById(R.id.txtFruitName); txtSize = (TextView) view.findViewById(R.id.txtFruitSize); txtColor = (TextView) view.findViewById(R.id.txtFruitColor); //Initialize the Scan Object qrScan = new IntentIntegrator(getActivity()); //OnClickListener Attached to the Button btnScanQRCode.setOnClickListener(this); } //Getting the scan results @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data); if (result != null) { //Check to see if QR Code has nothing in it if (result.getContents() == null) { Toast.makeText(getActivity(), "Result Not Found", Toast.LENGTH_LONG).show(); } else { //QR Code contains some data try { //Convert the QR Code Data to JSON JSONObject obj = new JSONObject(result.getContents()); //Set up the TextView Values using the data from JSON txtFruit.setText(obj.getString("fruit")); txtSize.setText(obj.getString("size")); txtColor.setText(obj.getString("color")); } catch (JSONException e) { e.printStackTrace(); //In case of exception, display whatever data is available on the QR Code //This can be caused due to the format MisMatch of the JSON Toast.makeText(getActivity(), result.getContents(), Toast.LENGTH_LONG).show(); txtSize.setText(result.getContents()); System.out.println("code QR: " + result.getContents()); } } } else { super.onActivityResult(requestCode, resultCode, data); } } @Override public void onClick(View view) { //initiating the qr code scan qrScan.initiateScan(); } }
  • During initialization, you use the code qrScan = new IntentIntegrator (getActivity ()); - where you pass the link to the activation, and call the scan using the qrScan.initiateScan () method; QrScan does not even suspect the existence of your fragment. I do not know which library you used, but I advise you to see if there is a method or constructor where you could pass a link to your fragment. - Vitaly Tomashevsky

1 answer 1

This replacement helped:

  public void onClick(View view) { IntentIntegrator.forFragment(this).initiateScan(); }