java.lang.RuntimeException: не удается создать обработчик внутри потока, который не вызвал Looper.prepare()

Question

При компиляции я получаю ошибку java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare().

Я много гулял, но я все еще не могу найти решение.
Просьба помочь мне с моим кодом.

SoapObject request = new SoapObject(NAMESPACE, METHOD_GET_LOGIN_DETAILS); 
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11); 
request.addProperty("loginUsr", user); 
request.addProperty("loginPasswd", pass); 
envelope.dotNet = true; // to handle .net services asmx/aspx 
envelope.setOutputSoapObject(request); 
HttpTransportSE ht = new HttpTransportSE(URL_PROTOCOL + mSettings.getMmpServerpath() + URL_SERVICE_NAME); 
ht.debug = true; 
String soap_action = NAMESPACE + METHOD_GET_LOGIN_DETAILS; 
ht.call(soap_action, envelope); 
SoapPrimitive resultString = (SoapPrimitive) envelope.getResponse(); 
File mImpOutputFile = Supporter.getImpOutputFilePathByCompany("MobManufacturingProcess", "00", 
    "FiGoodsDetails" + ".xml"); 
if (!mImpOutputFile.exists()) { 
    Supporter.createFile(mImpOutputFile); 
} else { 
    mImpOutputFile.delete(); // to refresh the file 
    Supporter.createFile(mImpOutputFile); 
} 

BufferedWriter buf = new BufferedWriter(new FileWriter(mImpOutputFile, true)); 

buf.append("<" + "Details" + ">"); 

buf.append(resultString.toString()); 

buf.append("</" + "Details" + ">"); 
result = "success"; 

buf.close(); 

} catch (

SocketTimeoutException e) 

{ 
    result = "time out error"; 
    e.printStackTrace(); 
} catch (

IOException e) 

{ 
    result = "input error"; 
    e.printStackTrace(); 
} catch (

XmlPullParserException e) 

{ 
    result = "error"; 
    e.printStackTrace(); 
} catch (

Exception e) 

{ 
    Log.e("tag", "error", e); 
    result = "error"; 
} 
new DataLoadToDBOperation().execute(); 
return result; 

} 

} 

@Override 
protected void onPostExecute(String result) { 
    // TODO Auto-generated method stub 
    /* String[] result=totVal.get(totVal.size()); */ 
    // super.onPostExecute(totVal); 

    if (result.equals("success")) { 
     new DataLoadToDBOperation().execute(); 

    } else { 
     mToastMsg.showToast(LogInActivity.this, "Invalid Username or Password"); 
    } 

    dialog.cancel(); 
} 

} 

private class DataLoadToDBOperation extends AsyncTask < String, String, String > { 
    private String user; 
    private String pass; 
    private ProgressDialog dialog; 

    public DataLoadToDBOperation() { 
     dialog = new ProgressDialog(LogInActivity.this); 
     dialog.setCancelable(false); 
    } 

    @Override 
    protected String doInBackground(String...params) { 

     String errMsg = ""; 

     try { 

      String result = ""; 

      DataLoader fileLoader = new DataLoader(LogInActivity.this, mDBHelper, user); 

      List <String> importFileList = mSupporter.loadImportFileList(); 

      int totImpFile = importFileList.size(); 

      File salPer_folder_path = Supporter.getImportFolderPath(user); 

      List <String> compList = mSupporter.getFolderNames(salPer_folder_path); 

      int compSize = compList.size(); 

      if (compSize != 0) { 

       startDBTransaction("db data loading"); // to start db 
       // transaction 

       for (int c = 0; c < compList.size(); c++) { 

        String serCompName = compList.get(c); 

        for (int i = 0; i < totImpFile; i++) { 

         String fileName = importFileList.get(i); 

         if ((c > 0) && (fileName.equals("FigoodsDetail"))) { // to 
          // load 
          // FigoodsDetail 
          // data 
          // once 
          continue; // to continue for other files 
         } 

         mImpOutputFile = Supporter.getImpOutputFilePathByCompany(spCode, serCompName, 
         fileName + ".xml"); 

         if (mImpOutputFile.exists()) { 
          InputStream inputStream; 

          inputStream = new FileInputStream(mImpOutputFile); 
          String[] resultArray = fileLoader.parseDocument(inputStream); 

          result = resultArray[0]; 
          errMsg = resultArray[1]; 

          if (!result.equals("success")) { 
           mDBHelper.mEndTransaction(); 
           break; 
          } 

         } else { 
          result = "File not available"; 
          mDBHelper.mEndTransaction(); 
          break; 
         } 

        } 

        if (!result.equals("success")) { // to break from 
         // executing other 
         // companies 
         break; 
        } 

       } 
       endDBTransaction(); // to end db transaction 

      } else { 
       result = "File not available"; 
      } 

      return result; 
     } catch (Exception exe) { 
      exe.printStackTrace(); 
      String errorCode = "Err-CLS-2"; 
      LogFileCreator.appendLog(errorCode + " : " + exe.getMessage() + "\n" + errMsg); 
      String result = "error"; 
      return result; 
     } 
    } 

    /* 
    * @Override protected void onPostExecute(final String result) { if (dialog 
    * != null) { if (dialog.isShowing()) { dialog.dismiss(); } } 
    * 
    * if (result.equals("success")) { 
    * 
    * mCmpnyNameList = loadListOfCompany(); 
    * 
    * mAdptSpnCompany = new ArrayAdapter<String>(LogInActivity.this, 
    * android.R.layout.simple_dropdown_item_1line, mCmpnyNameList); 
    * 
    * mSpnCompany.setAdapter(mAdptSpnCompany); 
    * 
    * // to delete file after loaded to db mSupporter.deleteFileFolder(user); 
    * 
    * mSupporter.navigateTo(MainMenu.class); 
    * 
    * } else if (result.equals("nosd")) { 
    * mToastMsg.showToast(LogInActivity.this, "Sd card required"); } else if 
    * (result.equals("parsing error")) { mToastMsg 
    * .showToast(LogInActivity.this, "Error during parsing the data"); } else 
    * if (result.equals("File not available")) { 
    * mToastMsg.showToast(LogInActivity.this, "File not available"); } else { 
    * mToastMsg.showToast(LogInActivity.this, "Errorrrrrrrrr"); } 
    * 
    * } 
    */ 

    @Override 
    protected void onPreExecute() { 
     this.dialog.setMessage("Please wait until the data is loaded"); 
     this.dialog.show(); 
    } 

    @Override 
    protected void onProgressUpdate(String...values) {} 
} 

Answer 1

new DataLoadToDBOperation().execute(); 

проблема. AsyncTask использует внутренний обработчик для вызова некоторых своих обратных вызовов в потоке ui, и этот обработчик должен быть создан в потоке ui. Избавиться от этого вызова от doInBackground