Apps searching SQLlite DB and list view

public class Namelist extends Activity {
	ListView listView;
	DbManager db;
	ImageView btnImageSearch;
	String SName;
	EditText name;
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.namelist);
		
		db = new DbManager(this);
		listView = (ListView)findViewById(R.id.listView1);
		btnImageSearch = (ImageView)findViewById(R.id.imgSearch);
		name = (EditText)findViewById(R.id.editText1);
		displaySearch();
		
		btnImageSearch.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				SName = name.getText().toString();
				
				displaySearch();
				
			}
		});
	}

	   private void displaySearch() {
	    	// TODO Auto-generated method stub
	    	ArrayList<ArrayList<Object>> data = db.getAllRowsAsArrays();
	    	final ArrayList<String> items = new ArrayList<String>();
	    	final ArrayAdapter<String> aa;
	    	aa = new ArrayAdapter<String>(this,
	    	android.R.layout.simple_list_item_1, items);
	    	for (int position = 0; position < data.size(); position++) {
	    	ArrayList<Object> row = data.get(position);
	    	items.add("Id : " + row.get(0).toString() + "\nFirst Name : "
	    	+ row.get(1).toString() + "\nLast Name : "
	    	+ row.get(2).toString());
	    	aa.notifyDataSetChanged();	
	    	}
	    	listView.setAdapter(aa);
	    	}

		private SQLiteDatabase db;
		private final String DBNAME = "studentsdb";
		private final int DBVER = 1;
		private final String TBLNAME = "students";
		final static String SID = "id";
		final static String SNAME = "name";
		final static String SCOURSE = "course";

		public ArrayList<ArrayList<Object>> getAllRowsAsArrays()
		
		{
			ArrayList<ArrayList<Object>> dataArrays = new ArrayList<ArrayList<Object>>();
			Cursor cursor;
			try
			{
				cursor = db.query(
				TBLNAME,
				new String[]{SID, SNAME, SCOURSE},
				null, null, null, null, null
				);
				cursor.moveToFirst();
			if (!cursor.isAfterLast())
			{
			do
				{
					ArrayList<Object> dataList = new ArrayList<Object>();
					dataList.add(cursor.getLong(0));
					dataList.add(cursor.getString(1));
			
					dataList.add(cursor.getString(2));
					dataArrays.add(dataList);
				}
			while (cursor.moveToNext());
			}
			}
			catch (SQLException e)
			{
			Log.e("DB Error", e.toString());
			e.printStackTrace();
			}
			return dataArrays;
		}