OutOfIndex сбой при onListItemClick называется

Question

Это мой список адаптер:

import android.content.Context; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ArrayAdapter; 
import android.widget.ImageView; 
import android.widget.ProgressBar; 
import android.widget.TextView; 
import android.widget.Toast; 

public class MobileArrayAdapter extends ArrayAdapter<List<item>> { 
    private final Context context; 
    private final List<item> markers; 
    private final static String[] a={"s"}; 

    public MobileArrayAdapter(Context context, List<item> markers) { 
     super(context, R.layout.list_item); 
     this.context = context; 
     this.markers = markers; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     LayoutInflater inflater = (LayoutInflater) context 
      .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 

     View rowView = inflater.inflate(R.layout.list_item, parent, false); 
     TextView title = (TextView) rowView.findViewById(R.id.title); 
     ProgressBar loader = (ProgressBar) rowView.findViewById(R.id.loader); 
     ImageView image = (ImageView) rowView.findViewById(R.id.itemimgae); 
     TextView views = (TextView) rowView.findViewById(R.id.views); 
     TextView likes=(TextView) rowView.findViewById(R.id.likes); 
     TextView upvote=(TextView) rowView.findViewById(R.id.upvote); 
     TextView downvote=(TextView) rowView.findViewById(R.id.downvote); 
     TextView desc=(TextView) rowView.findViewById(R.id.desc); 
     TextView pub =(TextView) rowView.findViewById(R.id.pub); 
     TextView idnum =(TextView) rowView.findViewById(R.id.idnum); 

     title.setText("  "+markers.get(position).getTitle()); 
     views.setText(markers.get(position).getView()+""); 
     likes.setText(markers.get(position).getLike()+""); 
     upvote.setText(markers.get(position).getUpvote()+""); 
     downvote.setText(markers.get(position).getDownvote()+""); 
     desc.setText(markers.get(position).getDesc()); 
     pub.setText(markers.get(position).getPub()+""); 
     idnum.setText(markers.get(position).getId()+""); 

     return rowView; 
    } 

    @Override 
    public int getCount() { 
     // TODO Auto-generated method stub 
     return (this.markers != null) ? this.markers.size() : 0; 

    } 


} 

аварий приложение, когда я нажимаю на одном из элементов в ListView .. В

LogCat:

10-12 18:20:49.791: W/dalvikvm(3450): threadid=1: thread exiting with uncaught exception (group=0x4107b930) 
10-12 18:20:49.801: E/AndroidRuntime(3450): FATAL EXCEPTION: main 
10-12 18:20:49.801: E/AndroidRuntime(3450): java.lang.IndexOutOfBoundsException: Invalid index 2, size is 0 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:251) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at java.util.ArrayList.get(ArrayList.java:304) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at android.widget.ArrayAdapter.getItem(ArrayAdapter.java:337) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at com.example.free.ListActivity.onListItemClick(ListActivity.java:94) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at android.support.v4.app.ListFragment$2.onItemClick(ListFragment.java:58) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at android.widget.AdapterView.performItemClick(AdapterView.java:298) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at android.widget.AbsListView.performItemClick(AbsListView.java:1100) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at android.widget.AbsListView$PerformClick.run(AbsListView.java:2749) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at android.widget.AbsListView$1.run(AbsListView.java:3423) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at android.os.Handler.handleCallback(Handler.java:725) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at android.os.Handler.dispatchMessage(Handler.java:92) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at android.os.Looper.loop(Looper.java:137) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at android.app.ActivityThread.main(ActivityThread.java:5227) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at java.lang.reflect.Method.invokeNative(Native Method) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at java.lang.reflect.Method.invoke(Method.java:511) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562) 
10-12 18:20:49.801: E/AndroidRuntime(3450):  at dalvik.system.NativeStart.main(Native Method) 

В строке 94:

String selectedValue = (String) getListAdapter().getItem(position); 

T он весь метод:

@Override 
public void onListItemClick(ListView l, View v, int position, long id) { 

    // get selected items 
    String selectedValue = (String) getListAdapter().getItem(position); 
    Toast.makeText(getActivity(), selectedValue, Toast.LENGTH_SHORT).show(); 

} 

В чем проблема? ти

Answer 1

Просто перейти к

//String selectedValue = (String) getListAdapter().getItem(position); 
String selectedValue = markers.get(position).getTitle(); 

или попробовать перекрывая getItem() и вернуть товар там.

Редактировать

Я не уверен в ваших данных, но вы можете вернуть объект данных в GetItem() что-то вроде этого

@Override 
    public Object getItem(int position) { 
     return "123"; 
    } 

это только образец .. если вы вызовет getListAdapter().getItem(position), он вернет строку 123, вы можете изменить ее к вашему требованию данных.

Answer 2

Вы можете сделать это:

@Override 
public void onListItemClick(ListView l, View v, int position, long id) { 

    TextView title = (TextView) v.findViewById(R.id.title); 
    ProgressBar loader = (ProgressBar) v.findViewById(R.id.loader); 
    ImageView image = (ImageView) v.findViewById(R.id.itemimgae); 
    TextView views = (TextView) v.findViewById(R.id.views); 
    TextView likes=(TextView) v.findViewById(R.id.likes); 
    TextView upvote=(TextView) v.findViewById(R.id.upvote); 
    TextView downvote=(TextView) v.findViewById(R.id.downvote); 
    TextView desc=(TextView) v.findViewById(R.id.desc); 
    TextView pub =(TextView) v.findViewById(R.id.pub); 
    TextView idnum =(TextView) v.findViewById(R.id.idnum); 

//than use the values 
    String stLikes = likes.getText().toString(); 
/..... 
}