Ajouter une barre d'onglets dans la méthode doInBackground obtenir une exception dans android

Question

J'ajoute une barre d'onglets dans la méthode doInBackground et je reçois une exception dans android. Quelqu'un peut-il me dire comment faire cela? Donne un exemple. Mon code est ci-dessous:

package com.inquest; 


import java.util.ArrayList; 

//import com.inquest.LoginActivity.FetchTask; 

import android.app.Activity; 
import android.app.AlertDialog; 
import android.app.ProgressDialog; 
import android.app.TabActivity; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.content.res.Resources; 
import android.graphics.Typeface; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.os.Handler; 
import android.os.Message; 
import android.util.Log; 
import android.view.Gravity; 
import android.widget.Button; 
import android.widget.RelativeLayout; 
import android.widget.TabHost; 
import android.widget.TabWidget; 
import android.widget.TextView; 
import android.widget.TabHost.TabSpec; 
//TabActivity 

public class HelloTabWidget extends TabActivity 
{ 
    int width =40; 
    int height =49; 
//private TabHost tabHost; 
TextView txthome; 
TextView txtstock; 
TextView txtcitn; 
TextView txtmyquest; 
Button btn; 
//private ProgressDialog pd = null; 
    private ProgressDialog dlg; 
    private Object data = null; 
    String strusername=""; 
    String strPassWord=""; 
    String questGroupId=""; 
    String userid=""; 
    String systemuserid=""; 
    String providerid=""; 
    private ProgressDialog dialog; 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.tab); 


new TabTask(HelloTabWidget.this).execute(null); 

} 







public class TabTask extends AsyncTask<Void, Void,Void> 
{ 
    private ProgressDialog dlg; 
      private Context ctx; 
    public TabTask(Context context) { 
     ctx = context; 
    } 



    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     dlg = new ProgressDialog(HelloTabWidget.this); 
     dlg.setMessage("Loading...."); 
     dlg.show(); 
    } 



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



    try 
     { 


     Resources res = getResources(); 
     TabHost.TabSpec spec; 
     TabHost tabHost=getTabHost(); 

     TabWidget tabWidget = tabHost.getTabWidget(); 
     //TabHost tabHost=(TabHost)this.findViewById(R.) 
     //TabHost tabHost = (TabHost)this.findViewById(R.id.) 


     // tabHost.setBackgroundResource(R.color.gray1); 
    //tabWidget.setBackgroundResource(R.color.gray1); 
     //tabWidget.setBackgroundDrawable(res.getDrawable(R.drawable.quest_tab_bar_icon)); 
     //tabWidget.setBackgroundColor(R.color.gray1); 
     //tabWidget.setBackgroundDrawable(getResources().getDrawable(R.drawable.tabbar)); 
     Typeface myTypeface = Typeface.createFromAsset(ctx.getAssets(),"verdanab.TTF"); 
     Typeface myTypeface1 = Typeface.createFromAsset(ctx.getAssets(),"verdana.TTF"); 
     Intent homeintent; 
     // Create an Intent to launch an Activity for the tab (to be reused) 
     homeintent = new Intent(); 
     Bundle bundle=getIntent().getExtras(); 
     String strusername=bundle.get("strUserName").toString(); 
     String strPassWord=bundle.get("strPassword").toString(); 
     String questGroupId=bundle.get("questGroupId").toString(); 
     String userid=bundle.get("userid").toString(); 
     String systemuserid=bundle.get("systemuserid").toString(); 
     String providerid=bundle.get("providerid").toString(); 
     Log.d("home activity username", strusername); 
     Log.d("home activity password", strPassWord); 
     Log.d("home activityquestGroupId",questGroupId); 
      homeintent.setClass(ctx, HomeActivityGroup.class); 
     homeintent.putExtra("strUserName", strusername); 
     homeintent.putExtra("strPassWord",strPassWord); 
     homeintent.putExtra("questGroupId",questGroupId); 
     homeintent.putExtra("userid",userid); 
     homeintent.putExtra("systemuserid", systemuserid); 
     homeintent.putExtra("checking", "one"); 

      spec = tabHost.newTabSpec("home").setIndicator("Home",res.getDrawable(R.drawable.home_tab_bar_icon)).setContent(homeintent); 
     tabHost.addTab(spec); 

     //homeintent = new Intent().setClass(this,ThemeSearchActivity.class); 
     homeintent = new Intent().setClass(ctx,StockActivity.class); 
     homeintent.putExtra("strUserName", strusername); 
     homeintent.putExtra("strPassWord",strPassWord); 
     homeintent.putExtra("questGroupId",questGroupId); 
     homeintent.putExtra("userid",userid); 
     homeintent.putExtra("systemuserid", systemuserid); 
     homeintent.putExtra("providerid", providerid); 
     spec = tabHost.newTabSpec("stock").setIndicator("Stock",res.getDrawable(R.drawable.stocks_tab_bar_icon)).setContent(homeintent); 
     tabHost.addTab(spec); 
     homeintent = new Intent().setClass(ctx,ArticleActivity.class); 
      spec = tabHost.newTabSpec("citn").setIndicator("CITN",res.getDrawable(R.drawable.citn_tabbar_icon)).setContent(homeintent); 
     tabHost.addTab(spec); 
     homeintent = new Intent().setClass(ctx, MyCompaniesActivity.class); 
     spec = tabHost.newTabSpec("myquest").setIndicator("My Quest",res.getDrawable(R.drawable.quest_tab_bar_icon)).setContent(homeintent); 
     tabHost.addTab(spec); 

     for (int i =0; i < tabWidget.getChildCount(); i++) { 
     //tabWidget.getChildAt(i).setBackgroundColor(R.color.black); 
      tabWidget.getChildAt(i).getLayoutParams().height = height; 
     tabWidget.getChildAt(i).getLayoutParams().width = width; 
     RelativeLayout relLayout = (RelativeLayout)tabWidget.getChildAt(i); 
     TextView tv = (TextView)relLayout.getChildAt(1); 
     tv.setTextSize(10.0f); 
     //tv.setCompoundDrawablesWithIntrinsicBounds(0, 1, 0, 0); 
    tv.setTypeface(myTypeface1);   



      } 
     } 
      catch (Exception e) { 
     // TODO: handle exception 
       e.printStackTrace(); 
     } 



     return null; 
      //return parservalue; 
     } 

} 


} 

Answer 1

Jusqu'à présent, je suppose, ajout d'onglets doivent être effectués dans l'interface utilisateur Discussion/ Tu ne peux pas le faire dans les tâches de fond. Vous ajoutez tous vos onglets dans la méthode DoInBackground.