AsyncTask崩溃，由于NetworkonMainThreadException

-1

我的应用程序崩溃时，我试图去到另一个页面，这是错误代码;AsyncTask崩溃，由于NetworkonMainThreadException

 01-05 18:49:25.976: E/AndroidRuntime(7596): FATAL EXCEPTION: main 
01-05 18:49:25.976: E/AndroidRuntime(7596): android.os.NetworkOnMainThreadException 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1144) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at java.net.InetAddress.lookupHostByName(InetAddress.java:385) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at java.net.InetAddress.getAllByName(InetAddress.java:214) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:670) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:509) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at com.example.splashscreentwo.JSONParser.makeHttpRequest(JSONParser.java:62) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at com.example.splashscreentwo.EmployeePayslip$GetEmployeeDetails$1.run(EmployeePayslip.java:127) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at android.os.Handler.handleCallback(Handler.java:730) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at android.os.Handler.dispatchMessage(Handler.java:92) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at android.os.Looper.loop(Looper.java:137) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at android.app.ActivityThread.main(ActivityThread.java:5493) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at java.lang.reflect.Method.invokeNative(Native Method) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at java.lang.reflect.Method.invoke(Method.java:525) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1209) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1025) 
01-05 18:49:25.976: E/AndroidRuntime(7596):  at dalvik.system.NativeStart.main(Native Method)

我真的不懂代码，不确定是什么导致了问题，以下是我的java类。

 package com.example.splashscreentwo; 

import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.List; 

import org.apache.http.NameValuePair; 
import org.apache.http.message.BasicNameValuePair; 
import org.json.JSONArray; 
import org.json.JSONException; 
import org.json.JSONObject; 


import android.app.Activity; 
import android.app.ProgressDialog; 
import android.content.Intent; 
import android.net.Uri; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.telephony.SmsManager; 
import android.util.Log; 
import android.view.View; 
import android.widget.Button; 
import android.widget.ImageButton; 
import android.widget.TextView; 
import android.widget.Toast; 

public class EmployeePayslip extends Activity { 

    private ProgressDialog pDialog; 
    String pid; 
    TextView employeeName; 
    TextView Desc; 
    TextView txtCreatedAt; 

    // Creating JSON Parser object 
    JSONParser jParser = new JSONParser(); 
    JSONArray payslip = null; 
    ArrayList<HashMap<String, String>> payslipList; 

    // url to get all fulltime employees list 
    private static String url_payslip = "http://rollit.sg/FYP/ExportPayslip.php"; 
    private static final String url_employees_details = "http://rollit.sg/FYP/get_employees_details.php"; 

    private static final String TAG_SUCCESS = "success"; 
    private static final String TAG_PAYSLIP = "payslip"; 
    private static final String TAG_PID = "pid"; 
    private static final String TAG_NAME = "name"; 
    private static final String TAG_PAYSLIPNO = "payslipno"; 
    private static final String TAG_NETSALARY = "netsalary"; 
    private static final String TAG_ISSUEDATE = "issuedate"; 
    private static final String TAG_STARTOFPAYSLIP = "startofpayslip"; 
    private static final String TAG_ENDOFPAYSLIP = "endofpayslip"; 
    private static final String TAG_TYPEOFALLOWANCE = "typeofallowance"; 
    private static final String TAG_ALLOWANCEAMT = "allowanceamt"; 
    private static final String TAG_ALLOWANCEDATE = "allowancedate"; 
    private static final String TAG_AVAILABLEALLOWANCE = "availableallowance"; 
    private static final String TAG_TYPEOFDEDUCTION = "typeofdeduction"; 
    private static final String TAG_DEDUCTIONAMT = "deductionamt"; 
    private static final String TAG_DEDUCTIONDATE = "deductiondate"; 
    private static final String TAG_AGREEDOVERTIMERATE = "agreedovertimerate"; 
    private static final String TAG_OVERTIMERATE = "overtimerate"; 
    private static final String TAG_STARTOFOVERTIMEPERIOD = "startofovertimeperiod"; 
    private static final String TAG_ENDOFOVERTIMEPERIOD = "endofovertimeperiod"; 
    private static final String TAG_BASICSALARY = "basicsalary"; 
    private static final String TAG_EXTRAPAYMENT = "extrapayment"; 

    private static final String TAG_EMPLOYEE = "employ"; 
    private static final String TAG_SALARY = "pay"; 
    private static final String TAG_DESCRIPTION = "description"; 




    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.employeepayslip); 




    payslipList = new ArrayList<HashMap<String, String>>(); 

    // Loading all fulltime employees in Background Thread 
    // getting employee details from intent 
    Intent i = getIntent(); 

    // getting employee id (pid) from intent 
    pid = i.getStringExtra(TAG_PID); 


    new GetEmployeeDetails().execute(); 

    } 
    class GetEmployeeDetails extends AsyncTask<String, String, String> { 

     /** 
     * Before starting background thread Show Progress Dialog 
     * */ 
     @Override 
     protected void onPreExecute() { 
      super.onPreExecute(); 
      pDialog = new ProgressDialog(EmployeePayslip.this); 
      pDialog.setMessage("Loading employees details. Please wait..."); 
      pDialog.setIndeterminate(false); 
      pDialog.setCancelable(true); 
      pDialog.show(); 
     } 

     /** 
     * Getting employee details in background thread 
     * */ 
     protected String doInBackground(String... params) { 

      // updating UI from Background Thread 
      runOnUiThread(new Runnable() { 
       public void run() { 
        // Check for success tag 
        int success; 
        try { 
         // Building Parameters 
         List<NameValuePair> params = new ArrayList<NameValuePair>(); 
         params.add(new BasicNameValuePair("pid", pid)); 

         // getting employee details by making HTTP request 
         // Note that employee details url will use GET request 
         JSONObject json = jParser.makeHttpRequest(
           url_employees_details, "GET", params); 

         // check your log for json response 
         Log.d("Employee Details", json.toString()); 

         // json success tag 
         success = json.getInt(TAG_SUCCESS); 
         if (success == 1) { 
          // successfully received employee details 
          JSONArray employeeObj = json 
            .getJSONArray(TAG_EMPLOYEE); // JSON Array 

          // get first employee object from JSON Array 
          JSONObject employee = employeeObj.getJSONObject(0); 

          // employee with this pid found 
          // Edit Text 
          employeeName = (TextView) findViewById(R.id.employeeName); 

          Desc = (TextView) findViewById(R.id.department); 

          // display employee data in EditText 
          employeeName.setText(employee.getString(TAG_NAME)); 

          Desc.setText(employee.getString(TAG_DESCRIPTION)); 

         }else{ 
          // employee with pid not found 
         } 
        } catch (JSONException e) { 
         e.printStackTrace(); 
        } 
       } 
      }); 

      return null; 
     } 

     /** 
     * After completing background task Dismiss the progress dialog 
     * **/ 
     protected void onPostExecute(String file_url) { 
      // dismiss the dialog once got all details 
      pDialog.dismiss(); 
     } 
    } 
}

那么，是什么导致了这个问题呢？任何帮助非常感谢，谢谢！

来源

2014-01-05 user3021001

'runOnUiThread'在'doInBackground'，也不好...... –

删除

runOnUiThread(new Runnable() { 
      public void run() {

http://developer.android.com/reference/android/app/Activity.html#runOnUiThread(java.lang.Runnable)

你不需要这个堂妹doInbackground调用在后台线程。如果您需要更新ui，您可以在UI60线程调用onPostExecute。

http://developer.android.com/reference/android/os/NetworkOnMainThreadException.html

初始化onCreate

employeeName = (TextView) findViewById(R.id.employeeName); 
Desc = (TextView) findViewById(R.id.department);

你也应该移动employeeName.setText(employee.getString(TAG_NAME))和Desc.setText(employee.getString(TAG_DESCRIPTION))到onPostExecute。

后台计算的结果返回doInbackground，参数onPostExecute。因此，基于结果在onPostExecute返回更新UI相应

阅读4个步骤@

http://developer.android.com/reference/android/os/AsyncTask.html

来源

2014-01-05 10:58:43 Raghunandan

是解决我的问题，感谢队友！ – user3021001

@ user3021001阅读本文http://meta.stackexchange.com/questions/5234/how-does-accepting-an-answer-work – Raghunandan

AsyncTask崩溃，由于NetworkonMainThreadException

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