爲什麼getView方法給出空指針異常？

我提出這有兩個部分都部分有不同的XML，但我getView方法不能正常工作給予以下情況例外列表視圖： -爲什麼getView方法給出空指針異常？

10-03 14:34:29.421: E/AndroidRuntime(11029): FATAL EXCEPTION: main 
10-03 14:34:29.421: E/AndroidRuntime(11029): java.lang.NullPointerException 
10-03 14:34:29.421: E/AndroidRuntime(11029): at android.widget.AbsListView.obtainView(AbsListView.java:1594) 
10-03 14:34:29.421: E/AndroidRuntime(11029): at an droid.widget.ListView.makeAndAddView(ListView.java:1782) 
10-03 14:34:29.421: E/AndroidRuntime(11029): at android.widget.ListView.fillDown(ListView.java:705) 
10-03 14:34:29.421: E/AndroidRuntime(11029): at android.widget.ListView.fillFromTop(ListView.java:762) 
10-03 14:34:29.421: E/AndroidRuntime(11029): at android.widget.ListView.layoutChildren(ListView.java:1619) 
10-03 14:34:29.421: E/AndroidRuntime(11029): at android.widget.AbsListView.onLayout(AbsListView.java:1422) 
10-03 14:34:29.421: E/AndroidRuntime(11029): at android.view.View.layout(View.java:7175) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at android.widget.RelativeLayout.onLayout(RelativeLayout.java:912) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at android.view.View.layout(View.java:7175) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at android.widget.FrameLayout.onLayout(FrameLayout.java:338) 
    10-03 14:34:29.421: E/AndroidRuntime(11029):  at android.view.View.layout(View.java:7175) 
    10-03 14:34:29.421: E/AndroidRuntime(11029):  at android.widget.FrameLayout.onLayout(FrameLayout.java:338) 
    10-03 14:34:29.421: E/AndroidRuntime(11029):  at android.view.View.layout(View.java:7175) 
    10-03 14:34:29.421: E/AndroidRuntime(11029):  at android.widget.FrameLayout.onLayout(FrameLayout.java:338) 
    10-03 14:34:29.421: E/AndroidRuntime(11029):  at android.view.View.layout(View.java:7175) 
    10-03 14:34:29.421: E/AndroidRuntime(11029):  at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1254) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1130) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at android.widget.LinearLayout.onLayout(LinearLayout.java:1047) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at android.view.View.layout(View.java:7175) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at android.widget.FrameLayout.onLayout(FrameLayout.java:338) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at android.view.View.layout(View.java:7175) 
    10-03 14:34:29.421: E/AndroidRuntime(11029):  at android.widget.RelativeLayout.onLayout(RelativeLayout.java:912) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at android.view.View.layout(View.java:7175) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at andr oid.widget.FrameLayout.onLayout(FrameLayout.java:338) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at android.view.View.layout(View.java:7175) 
    10-03 14:34:29.421: E/AndroidRuntime(11029):  at android.widget.FrameLayout.onLayout(FrameLayout.java:338) 
    10-03 14:34:29.421: E/AndroidRuntime(11029):  at android.view.View.layout(View.java:7175) 
    10-03 14:34:29.421: E/AndroidRuntime(11029):  at android.view.ViewRoot.performTraversals(ViewRoot.java:1146) 
    10-03 14:34:29.421: E/AndroidRuntime(11029):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1865) 
    10-03 14:34:29.421: E/AndroidRuntime(11029):  at android.os.Handler.dispatchMessage(Handler.java:99) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at android.os.Looper.loop(Looper.java:130) 
    10-03 14:34:29.421: E/AndroidRuntime(11029):  at android.app.ActivityThread.main(ActivityThread.java:3687) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at java.lang.reflect.Method.invokeNative(Native Method) 
    10-03 14:34:29.421: E/AndroidRuntime(11029):  at java.lang.reflect.Method.invoke(Method.java:507) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625) 
    10-03 14:34:29.421: E/AndroidRuntime(11029): at dalvik.system.NativeStart.main(Native Method)

我使用這個代碼： -

@Override 
public View getView(final int position, View convertView, ViewGroup parent) { 

    ViewHolder holder = null; 
    if(issection) 
    { 
     issection=false; 
     convertView=null; 
    } 

    if (convertView == null) { 

     final MyJobListModle objitem = data.get(position); 

     if (objitem != null && objitem.getIssection()!=null && !objitem.getIssection().equals("")) { 


      if (objitem.getIssection().equalsIgnoreCase("true")) { 

       convertView = objinflater.inflate(R.layout.listviewsection, 
         null); 
       holder = new ViewHolder(); 
       issection=true; 
       convertView.setOnClickListener(null); 
       convertView.setOnLongClickListener(null); 
       convertView.setLongClickable(false); 

       final TextView sectionView = (TextView) convertView 
         .findViewById(R.id.txtsection); 
       sectionView.setText(objitem.getHeader_title()); 
      } 

     } 
     else 
     { 
     convertView = objinflater.inflate(R.layout.postjobrow, null); 
     holder = new ViewHolder(); 

     holder.objjobname = (TextView) convertView.findViewById(R.id.textjob); 
     holder.objbidalerts = (TextView) convertView 
       .findViewById(R.id.textalert); 
     holder.objclick =(RelativeLayout)convertView.findViewById(R.id.textalertclick); 
     holder.bidalerttext=(TextView)convertView.findViewById(R.id.alerttext); 
     holder.objarrowimageView = (ImageView) convertView 
       .findViewById(R.id.imagearrow); 
     convertView.setTag(holder); 

    } 
    }else { 

     holder = (ViewHolder) convertView.getTag(); 
    } 


    /*---- Handle click on listview item ----*/ 
    if(holder!= null && holder.objarrowimageView!=null) 
    { 
    holder.objarrowimageView.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      String jobcode = data.get(position).getId(); 
      Bundle objbundle = new Bundle(); 
      Intent objintent = new Intent(objactivity,EditPostJobSection.class); 
      objbundle.putString("jobid",jobcode); 
      objbundle.putString("from","myjobadapter"); 
      objbundle.putString("createdAt",data.get(position).getCreated()); 
      objintent.putExtras(objbundle); 
      objactivity.startActivity(objintent); 
     } 
    }); 
    } 
    if(holder!= null && holder.objclick!=null) 
    { 
    holder.objclick.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      String bidcount = data.get(position).getBid_count(); 
      if(!bidcount.equals("0")) 
      { 
       System.out.println("ok"); 
       ArrayList<JobBidAlertModle> objjobbidalertlist = data.get(position).getObjbidalertmodlelist(); 
       Bundle objbunlde = new Bundle(); 
       Intent objintent = new Intent(objactivity,MyJobBidAlerts.class); 
       objbunlde.putSerializable("objbidalertlist", objjobbidalertlist); 
       if(data!=null && data.size()>position) 
       { 
        objbunlde.putString("title",data.get(position).getTitle()); 
       } 
       objbunlde.putString("createdAt",data.get(position).getCreated()); 
       objbunlde.putString("from","myjobadapter"); 
       if(data!=null && data.size()!=0) 
        { 
        objbunlde.putString("lat",data.get(position).getLocationlat()); 
        objbunlde.putString("longi",data.get(position).getLocationlongi()); 
        } 
       objintent.putExtras(objbunlde); 
       objactivity.startActivity(objintent); 
      } 
      if(bidcount.equals("0")) 
      { 

      } 


     } 
    }); 

    } 

    if(holder!= null && holder.objjobname!=null && holder.objbidalerts!=null) 
    { 
    holder.objjobname.setText(data.get(position).getTitle()); 
    String bidcount = data.get(position).getBid_count(); 
    if(bidcount.equals("0")) 
    { 
     holder.objbidalerts.setVisibility(View.INVISIBLE); 
    } 
    else 
    { 
     holder.objbidalerts.setVisibility(View.VISIBLE); 
     holder.objbidalerts.setText(bidcount); 
    } 
    } 


    return convertView; 
}

當我執行空指針occure.I無法排除什麼確切的問題。請有人建議me.thanks地段

來源

2012-10-03 LOOSER

您可以重新檢查您的日誌貓，並確切地看到您的軟件包從日誌貓的哪一行開始。雙擊該行並告訴我們它指向的是哪一行。空指針異常是最常見的異常，並在您嘗試訪問空變量時上升。 – Android

您可能沒有定義TextView與R.id.txtsection在listviewsection.xml文件。

來源

2012-10-03 09:32:09 MAC

爲什麼getView方法給出空指針異常？

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