"The method setListAdapter(ArrayAdapter) is undefined for the type create"

Question

I am completely new to java & android, so I tried to find useful samples from android & databases. I found this blog with a project:

http://saigeethamn.blogspot.com/2009/10/android-developer-tutorial-part-12.html

I ran the project and it works fine, but I was trying to create a new project to copy & paste the code in it and this is not working :(

I had a problem on this line:

this.setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,results)); 

This is the error I get:

The method setListAdapter(ArrayAdapter) is undefined for the type create

It looks like a method in C#, but I can find it in the original project.

Where did I make a mistake?

Answer 1

When you call this.setListAdapter this must extend ListActivity probably you class just extends Activity.

Answer 2

this code work for me..

package com.Itrack.Mobile;  import java.util.ArrayList; import android.app.ListActivity; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.SimpleCursorAdapter; import android.widget.TextView; import android.widget.Toast;  public class listV extends ListActivity { public SQLiteDatabase db; @Override protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);         // Check if the database exist  //     db = openOrCreateDatabase(             "itrackmobile.sqlite"             , SQLiteDatabase.CREATE_IF_NECESSARY             , null             );      try     {         Cursor c = db.query("basico", new String[]                {"_id","codigo","cantidad","fecha"},null,null,null,null,null);          // rutina de prueba //                 ArrayList<String> mArrayList = new ArrayList<String>();                 c.moveToFirst();                 while(!c.isAfterLast()) {                      mArrayList.add("ID: " +c.getString(c.getColumnIndex("_id")) +             "\nCodigo : " + c.getString(c.getColumnIndex("codigo")) + "\nCantidad : "             + c.getString(c.getColumnIndex("cantidad")) + "\nFecha : " +                 c.getString(c.getColumnIndex("fecha")) );                       c.moveToNext();              }                  setListAdapter( new ArrayAdapter<String>                  (this,R.layout.single_item,mArrayList));                 ListView  list  = getListView();                 list.setTextFilterEnabled(true);                 list.setOnItemClickListener(new OnItemClickListener() {          @Override         public void onItemClick(AdapterView<?> arg0, View arg1,                             int arg2, long arg3) {                       Toast.makeText(getApplicationContext(), ((TextView)                        arg1).getText(), Toast.LENGTH_SHORT).show();                     }                  });     }     catch (RuntimeException e)     {         Log.e("basico", e.toString(), e);     }    }   }