Проблема в том что проблема в том что при таком подходе в методе jsonPost(qrData) идёт несколько запросов к серверу, а нужен только один

   @Override         public void receiveDetections(Detector.Detections<Barcode> detections) {             final SparseArray<Barcode> qrcodes = detections.getDetectedItems();             if (qrcodes.size() != 0) {                 txtResult.post(new Runnable() {                     @Override                     public void run() {                          txtResult.setText(qrcodes.valueAt(0).displayValue);                         qrData = qrcodes.valueAt(0).displayValue;                         String text = jsonPost(qrData);                         Log.d("Text", text);                         if (text.contains("success")) {                             Toast.makeText(getApplicationContext(), "Операція успішна", Toast.LENGTH_LONG).show();                             cameraSource.release();                             cameraSource.stop();                             Intent intent = new Intent(MinusBonusesActivity.this, MainActivity.class);                             startActivity(intent);                         } else {                             Toast.makeText(getApplicationContext(), text, Toast.LENGTH_LONG).show();                         }                     }                 });             }         }     });  }   public String jsonPost(String qrData) {     String url = "http://admin.bonsitecrm.com/api/customer/add_bonus_manager";     StringRequest postRequest = new StringRequest(Request.Method.POST, url,             new Response.Listener<String>() {                 @Override                 public void onResponse(String response) {                     // response                     Log.d("Response", response);                     responseFromServer = response;                 }             },             new Response.ErrorListener() {                 @Override                 public void onErrorResponse(VolleyError error) {                     // error                     Log.d("Error.Response", error.toString());                 }             }     ) {         @Override         protected Map<String, String> getParams() {             Map<String, String> params = new HashMap<String, String>();             params.put("json", "{ \"user_id\":\"216\", \"customer_id\":\"6664\", \"operation\":\"minus\", \"amount\":\"100\", \"subject\":\"Тест\", \"access_token\":\"VHvjY3TFsSrDlbCg2MaeHInvyRGqQchMUN5SQZyjRZWdbytelEs3mPyUHelyrCklpqegpMAhMwuX5YbrCEvYu3TbheKIR43huiyU58bRFGPLE1dgGIfaL9m2o6LgbPxF\" }");             Log.d("Map", params.toString());             return params;         }     };     requestQueue.add(postRequest);     Log.d("ResponseFromServer", responseFromServer);     return responseFromServer; } 

Вывод консоли –

    01-11 16:18:37.877 26887-26887/com.work.golinko.shkafbonuses                                                                      D/ActivityThreadInjector: clearCachedDrawables.     01-11 16:18:38.128 26887-26887/com.work.golinko.shkafbonuses D/Camera: app passed NULL surface     01-11 16:18:38.334 26887-27087/com.work.golinko.shkafbonuses      D/OpenGLRenderer: endAllActiveAnimators on 0x7fa0ba2800 (RippleDrawable) with handle 0x7f8cf40e20     01-11 16:18:38.850 26887-26887/com.work.golinko.shkafbonuses I/Timeline:      Timeline: Activity_launch_request time:623583262     01-11 16:18:38.929 26887-26887/com.work.golinko.shkafbonuses      W/DynamiteModule: Local module descriptor class for com.google.android.gms.vision.dynamite not found.     01-11 16:18:38.935 26887-26887/com.work.golinko.shkafbonuses      I/DynamiteModule: Considering local module com.google.android.gms.vision.dynamite:0 and remote module com.google.android.gms.vision.dynamite:1402     01-11 16:18:38.935 26887-26887/com.work.golinko.shkafbonuses      I/DynamiteModule: Selected remote version of com.google.android.gms.vision.dynamite, version >= 1402     01-11 16:18:38.955 26887-26887/com.work.golinko.shkafbonuses I/Vision: Loading library libbarhopper.so     01-11 16:18:38.956 26887-26887/com.work.golinko.shkafbonuses I/Vision: libbarhopper.so library load status: true     01-11 16:18:38.978 26887-26887/com.work.golinko.shkafbonuses      D/ActivityThreadInjector: clearCachedDrawables.     01-11 16:18:39.977 26887-26887/com.work.golinko.shkafbonuses I/Choreographer: Skipped 59 frames!  The application may be doing too much work on its main thread.     01-11 16:18:42.531 26887-3531/com.work.golinko.shkafbonuses D/Map: {json={ "user_id":"216", "customer_id":"6664", "operation":"minus", "amount":"100", "subject":"Тест", "access_token":"VHvjY3TFsSrDlbCg2MaeHInvyRGqQchMUN5SQZyjRZWdbytelEs3mPyUHelyrCklpqegpMAhMwuX5YbrCEvYu3TbheKIR43huiyU58bRFGPLE1dgGIfaL9m2o6LgbPxF" }}     01-11 16:18:42.720 26887-26887/com.work.golinko.shkafbonuses D/Response: {"status":"success","code":"0","message":"success"}     01-11 16:18:42.722 26887-3534/com.work.golinko.shkafbonuses D/Map: {json={ "user_id":"216", "customer_id":"6664", "operation":"minus", "amount":"100", "subject":"Тест", "access_token":"VHvjY3TFsSrDlbCg2MaeHInvyRGqQchMUN5SQZyjRZWdbytelEs3mPyUHelyrCklpqegpMAhMwuX5YbrCEvYu3TbheKIR43huiyU58bRFGPLE1dgGIfaL9m2o6LgbPxF" }}     01-11 16:18:42.722 26887-3531/com.work.golinko.shkafbonuses D/Map: {json={ "user_id":"216", "customer_id":"6664", "operation":"minus", "amount":"100", "subject":"Тест", "access_token":"VHvjY3TFsSrDlbCg2MaeHInvyRGqQchMUN5SQZyjRZWdbytelEs3mPyUHelyrCklpqegpMAhMwuX5YbrCEvYu3TbheKIR43huiyU58bRFGPLE1dgGIfaL9m2o6LgbPxF" }}     01-11 16:18:42.722 26887-3532/com.work.golinko.shkafbonuses D/Map: {json={ "user_id":"216", "customer_id":"6664", "operation":"minus", "amount":"100", "subject":"Тест", "access_token":"VHvjY3TFsSrDlbCg2MaeHInvyRGqQchMUN5SQZyjRZWdbytelEs3mPyUHelyrCklpqegpMAhMwuX5YbrCEvYu3TbheKIR43huiyU58bRFGPLE1dgGIfaL9m2o6LgbPxF" }}     01-11 16:18:42.731 26887-3533/com.work.golinko.shkafbonuses D/Map: {json={ "user_id":"216", "customer_id":"6664", "operation":"minus", "amount":"100", "subject":"Тест", "access_token":"VHvjY3TFsSrDlbCg2MaeHInvyRGqQchMUN5SQZyjRZWdbytelEs3mPyUHelyrCklpqegpMAhMwuX5YbrCEvYu3TbheKIR43huiyU58bRFGPLE1dgGIfaL9m2o6LgbPxF" }}     01-11 16:18:42.738 26887-26887/com.work.golinko.shkafbonuses D/ResponseFromServer: {"status":"success","code":"0","message":"success"}     01-11 16:18:42.738 26887-26887/com.work.golinko.shkafbonuses D/Text: {"status":"success","code":"0","message":"success"}     01-11 16:18:42.789 26887-26887/com.work.golinko.shkafbonuses D/Camera: app passed NULL surface     01-11 16:18:42.816 26887-3531/com.work.golinko.shkafbonuses D/Map: {json={ "user_id":"216", "customer_id":"6664", "operation":"minus", "amount":"100", "subject":"Тест", "access_token":"VHvjY3TFsSrDlbCg2MaeHInvyRGqQchMUN5SQZyjRZWdbytelEs3mPyUHelyrCklpqegpMAhMwuX5YbrCEvYu3TbheKIR43huiyU58bRFGPLE1dgGIfaL9m2o6LgbPxF" }}     01-11 16:18:42.865 26887-3533/com.work.golinko.shkafbonuses D/Map: {json={ "user_id":"216", "customer_id":"6664", "operation":"minus", "amount":"100", "subject":"Тест", "access_token":"VHvjY3TFsSrDlbCg2MaeHInvyRGqQchMUN5SQZyjRZWdbytelEs3mPyUHelyrCklpqegpMAhMwuX5YbrCEvYu3TbheKIR43huiyU58bRFGPLE1dgGIfaL9m2o6LgbPxF" }}     01-11 16:18:42.868 26887-3532/com.work.golinko.shkafbonuses D/Map: {json={ "user_id":"216", "customer_id":"6664", "operation":"minus", "amount":"100", "subject":"Тест", "access_token":"VHvjY3TFsSrDlbCg2MaeHInvyRGqQchMUN5SQZyjRZWdbytelEs3mPyUHelyrCklpqegpMAhMwuX5YbrCEvYu3TbheKIR43huiyU58bRFGPLE1dgGIfaL9m2o6LgbPxF" }}     01-11 16:18:42.949 26887-26887/com.work.golinko.shkafbonuses I/Timeline:      Timeline: Activity_launch_request time:623587362     01-11 16:18:42.986 26887-26887/com.work.golinko.shkafbonuses D/Response: {"status":"success","code":"0","message":"success"}     01-11 16:18:42.987 26887-26887/com.work.golinko.shkafbonuses D/Response: {"status":"success","code":"0","message":"success"}     01-11 16:18:42.987 26887-26887/com.work.golinko.shkafbonuses D/Response: {"status":"success","code":"0","message":"success"}     01-11 16:18:42.987 26887-26887/com.work.golinko.shkafbonuses D/Response: {"status":"success","code":"0","message":"success"}     01-11 16:18:42.987 26887-26887/com.work.golinko.shkafbonuses D/Response: {"status":"success","code":"0","message":"success"}     01-11 16:18:42.998 26887-26887/com.work.golinko.shkafbonuses D/Response: {"status":"success","code":"0","message":"success"}     01-11 16:18:42.998 26887-26887/com.work.golinko.shkafbonuses D/Response: {"status":"success","code":"0","message":"success"}     01-11 16:18:43.041 26887-26887/com.work.golinko.shkafbonuses      D/ActivityThreadInjector: clearCachedDrawables.