我正在开发一个Android应用程序，该程序从MySQL数据库读取数据，但遇到了此错误。我有这个XML布局：

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:orientation="vertical" > 


        <TextView android:id="@+id/wardNumber" 
            android:layout_width="wrap_content" 
            android:layout_height="wrap_content" 
            android:layout_marginLeft="3dp" 
            android:text="Ward Number" 
            android:textSize="22dp"/> 


        <TextView android:id="@+id/dateTime" 
            android:layout_width="wrap_content" 
            android:layout_height="wrap_content" 
            android:layout_below="@id/wardNumber" 
            android:layout_alignParentRight="true" 
            android:layout_marginRight="3dp" 
            android:text="Date-Time" />

        <TextView
            android:id="@+id/name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignBaseline="@+id/dateTime"
            android:layout_alignBottom="@+id/dateTime"
            android:layout_alignLeft="@+id/wardNumber"
            android:layout_marginLeft="3dp" 
            android:text="Name" />

</RelativeLayout> 

这是我的Java文件：

public ApplicationAdapter(Context context, List<Application> items) {
    super(context, R.layout.app_custom_list, items);
    this.items = items;
}

@Override
public int getCount() {
    return items.size();
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View v = convertView;

    if(v == null) {
        LayoutInflater li = LayoutInflater.from(getContext());
        v = li.inflate(R.layout.app_custom_list, null);            
    }

    Application app = items.get(position);

    if(app != null) {
      //  ImageView icon = (ImageView)v.findViewById(R.id.appIcon);
        TextView wardNumber = (TextView)v.findViewById(R.id.wardNumber);
        TextView name = (TextView)v.findViewById(R.id.name);
      //  LinearLayout ratingCntr = (LinearLayout)v.findViewById(R.id.ratingCntr);
        TextView dateTime = (TextView)v.findViewById(R.id.dateTime);

  //      if(icon != null) {
  //          Resources res = getContext().getResources();
   //         String sIcon = "com.sj.jsondemo:drawable/" + app.getIcon();
   //         icon.setImageDrawable(res.getDrawable(res.getIdentifier(sIcon, null, null)));
   //     }

        if(wardNumber != null) wardNumber.setText(app.getTitle());

        if(name != null) name.setText(app.getTitle());

        if(dateTime != null) {
            dateTime.setText(app.getTotalDl());
          //  NumberFormat nf = NumberFormat.getNumberInstance();
          //  dateTime.setText(nf.format(app.getTotalDl())+" dl");            
        }


    }

    return v;
}
}

调用此Activity时，我收到以下错误消息：

11-24 21:12:03.633:  E/AndroidRuntime(1251):  FATAL EXCEPTION: main
11-24 21:12:03.633:  E/AndroidRuntime(1251): android.content.res.Resources$NotFoundException: String resource ID #0x0
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.content.res.Resources.getText(Resources.java:201)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.widget.TextView.setText(TextView.java:2863)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at com.sj.jsondemo.Appl icationAdapter.getView(ApplicationAdapter.java:53)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.widget.AbsListView.obtainView(AbsListView.java:1430)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.widget.ListView.measureHeightOfChildren(ListView.java:1216)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.widget.ListView.onMeasure(ListView.java:1127)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.view.View.measure(View.java:8313)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:701)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.widget.LinearLayout.onMeasure(LinearLayout.java:311)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.view.View.measure(View.java:8313)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.view.View.measure(View.java:8313)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.widget.LinearLayout.measureVertical(LinearLayout.java:531)
11-24 21:12:03.633: E/AndroidRuntime(1251):     at android.widget.LinearLayout.onMeasure(LinearLayout.java:309)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.view.View.measure(View.java:8313)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at  android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.view.View.measure(View.java:8313)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.view.ViewRoot.performTraversals(ViewRoot.java:839)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.view.ViewRoot.handleMessage(ViewRoot.java:1859)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.os.Handler.dispatchMessage(Handler.java:99)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.os.Looper.loop(Looper.java:130)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at android.app.ActivityThread.main(ActivityThread.java:3683)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at java.lang.reflect.Method.invokeNative(Native Method)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at java.lang.reflect.Method.invoke(Method.java:507)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
11-24 21:12:03.633:  E/AndroidRuntime(1251):    at dalvik.system.NativeStart.main(Native Method)
11-24 21:12:08.922: I/Process(1251): Sending signal. PID: 1251 SIG: 9

我不知道如何解决此错误。