SQLite读取全部数据

table中一共有11条记录，每个记录有三个内容"name","address","city"。现在要获取这些记录，但是我写的代码只能显示出一条记录，不知道怎么实现显示全部记录？
public void readData(View v)

{
    DatabaseClass mydb = new DatabaseClass(this);
    SQLiteDatabase readdata = mydb.getReadableDatabase();
    TextView tv = (TextView)findViewById(R.id.readtext);
    Cursor c = readdata.rawQuery("select * from mylistdata", null);
    int[] elementId = {R.id.textView1, R.id.textView2, R.id.textView3}; 
    if(c !=null)
    {
        c.moveToFirst();
        while(c.isAfterLast() == false)
        {
            listData = new ArrayList<GenericListItem>();
            String name = c.getString(c.getColumnIndex(DatabaseClass.NAME));
            String address = c.getString(c.getColumnIndex(DatabaseClass.ADDRESS));
            String city = c.getString(c.getColumnIndex(DatabaseClass.CITY));
            listData.add(new GenericListItem(new String[]{name,address,city}));
            listAdapter = new GenericListAdapter(getApplicationContext(), R.layout.list_layout, listData, elementId);
            result.setAdapter(listAdapter);
            c.moveToNext();
        }

    }