Пожалуйста, помогите, я поражен этим в течение 2 дней. Я хотел бы реализовать ListView с fastscroll и алфавитным индексатором как в приложении контактов / изображении ниже. Я'используя SimpleAdapter для заполнения ListView. Как видно из изображения, путем выбора буквы в алфавитном индексаторе справа выбор listView переходит к соответствующему элементу ListItem. Пожалуйста, поделитесь некоторыми примерами. Заранее спасибо. Пример: ниже приведен мой код, он просто сортирует алфавит, и когда я нажимаю на E, данные алфавита, связанные с E, отображаются на экране. Но он не показывает текстовое поле E в середине, когда я касаюсь алфавита.

Как отобразить текстовое поле E посередине. Когда я коснусь, должно появиться среднее текстовое поле.

MainActivity.java

   public class MainActivity extends Activity implements SearchView.OnQueryTextListener,SearchView.OnCloseListener {

private ListView listView;
private SearchView search;
EfficientAdapter objectAdapter;
EfficientAdapter2 objectAdapter1;
int textlength=0;
private CheckBox checkStat, checkRoutine, checkTat;
 private GestureDetector mGestureDetector;

    // x and y coordinates within our side index
    private static float sideIndexX;
    private static float sideIndexY;

    // height of side index
    private int sideIndexHeight;

    // number of items in the side index
    private int indexListSize;

    // list with items for side index
    private ArrayList indexList = null;


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
   setContentView(R.layout.homempleb);
   Log.i("scan"," txtScanResult ");

   Arrays.sort(CountriesList.name);
ActionItem nextItem     = new ActionItem(); 
final QuickAction quickAction = new QuickAction(this, QuickAction.VERTICAL);
quickAction.addActionItem(nextItem);
quickAction.setOnDismissListener(new QuickAction.OnDismissListener()           {            
    @Override
    public void onDismiss() {
        Toast.makeText(getApplicationContext(), "Dismissed", Toast.LENGTH_SHORT).show();
    }
});


listView = (ListView) findViewById(R.id.homelistView);
listView.setTextFilterEnabled(true);
objectAdapter = new EfficientAdapter(this);
 mGestureDetector = new GestureDetector(this, new SideIndexGestureListener());
listView.setAdapter(objectAdapter);


}
 @Override
    public boolean onTouchEvent(MotionEvent event)
    {
        if (mGestureDetector.onTouchEvent(event))
        {
            return true;
        } else
        {
            return false;
        }
    }

    private ArrayList createIndex(String[] strArr)
    {
        ArrayList tmpIndexList = new ArrayList();
        Object[] tmpIndexItem = null;

        int tmpPos = 0;
        String tmpLetter = "";
        String currentLetter = null;
        String strItem = null;

        for (int j = 0; j < strArr.length; j++)
        {
            strItem = strArr[j];
            currentLetter = strItem.substring(0, 1);

            // every time new letters comes
            // save it to index list
            if (!currentLetter.equals(tmpLetter))
            {
                tmpIndexItem = new Object[3];
                tmpIndexItem[0] = tmpLetter;
                tmpIndexItem[1] = tmpPos - 1;
                tmpIndexItem[2] = j - 1;

                tmpLetter = currentLetter;
                tmpPos = j + 1;

                tmpIndexList.add(tmpIndexItem);
            }
        }

        // save also last letter
        tmpIndexItem = new Object[3];
        tmpIndexItem[0] = tmpLetter;
        tmpIndexItem[1] = tmpPos - 1;
        tmpIndexItem[2] = strArr.length - 1;
        tmpIndexList.add(tmpIndexItem);

        // and remove first temporary empty entry
        if (tmpIndexList != null && tmpIndexList.size() > 0)
        {
            tmpIndexList.remove(0);
        }

        return tmpIndexList;
    }
    @Override
    public void onWindowFocusChanged(boolean hasFocus)
    {
        super.onWindowFocusChanged(hasFocus);

        final ListView listView = (ListView) findViewById(R.id.homelistView);
        LinearLayout sideIndex = (LinearLayout) findViewById(R.id.sideIndex);
        sideIndexHeight = sideIndex.getHeight();
        sideIndex.removeAllViews();

        // TextView for every visible item
        TextView tmpTV = null;

        // we'll create the index list
        indexList = createIndex(CountriesList.name);

        // number of items in the index List
        indexListSize = indexList.size();

        // maximal number of item, which could be displayed
        int indexMaxSize = (int) Math.floor(sideIndex.getHeight() / 20);

        int tmpIndexListSize = indexListSize;

        // handling that case when indexListSize > indexMaxSize
        while (tmpIndexListSize > indexMaxSize)
        {
            tmpIndexListSize = tmpIndexListSize / 2;
        }

        // computing delta (only a part of items will be displayed to save a
        // place)
        double delta = indexListSize / tmpIndexListSize;

        String tmpLetter = null;
        Object[] tmpIndexItem = null;

        // show every m-th letter
        for (double i = 1; i = 0 && sideIndexY >= 0)
    {
        displayListItem();
    }

    return super.onScroll(e1, e2, distanceX, distanceY);
}
  }

    public void displayListItem()
    {
    // compute number of pixels for every side index item
    double pixelPerIndexItem = (double) sideIndexHeight / indexListSize;

    // compute the item index for given event position belongs to
    int itemPosition = (int) (sideIndexY / pixelPerIndexItem);

    // compute minimal position for the item in the list
    int minPosition = (int) (itemPosition * pixelPerIndexItem);

    // get the item (we can do it since we know item index)
    Object[] indexItem = indexList.get(itemPosition);

    // and compute the proper item in the country list
    int indexMin = Integer.parseInt(indexItem[1].toString());
    int indexMax = Integer.parseInt(indexItem[2].toString());
    int indexDelta = Math.max(1, indexMax - indexMin);

    double pixelPerSubitem = pixelPerIndexItem / indexDelta;
    int subitemPosition = (int) (indexMin + (sideIndexY - minPosition) / pixelPerSubitem);

    ListView listView = (ListView) findViewById(R.id.homelistView);
    listView.setSelection(subitemPosition);
    }

EfficientAdapter.java

 public class EfficientAdapter extends BaseAdapter {
 private LayoutInflater mInflater;
  private Context context;

  public EfficientAdapter(Context context) {
mInflater = LayoutInflater.from(context);
this.context=context;

  }


 public int getCount() {
return CountriesList.name.length;
 }

     public Object getItem(int position) {

return position;
 }

      public long getItemId(int position) {
return position;
   }

         public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
    convertView = mInflater.inflate(R.layout.homemplebrowview, null);
    holder = new ViewHolder();
    holder.text1 = (TextView) convertView
            .findViewById(R.id.name);
    holder.text2 = (TextView) convertView
            .findViewById(R.id.mrn);
    holder.text3 = (TextView) convertView
            .findViewById(R.id.date);
    holder.text4 = (TextView) convertView
            .findViewById(R.id.age);
    holder.text5 = (TextView) convertView
            .findViewById(R.id.gender);
    holder.text6 = (TextView) convertView
            .findViewById(R.id.wardno);
    holder.text7 = (TextView) convertView
            .findViewById(R.id.roomno);
    holder.text8 = (TextView) convertView
            .findViewById(R.id.bedno);                  
    holder.btnList = (Button)convertView.findViewById(R.id.listbutton);
 //   holder.btnList.setOnClickListener(this);

    holder.btnList.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {                       
            Intent next=new Intent(context, SeviceDetails.class);
            context.startActivity(next);
        }
    });


    convertView.setTag(holder);
} else {
    holder = (ViewHolder) convertView.getTag();
}

holder.text1.setText(CountriesList.name[position]);
holder.text2.setText(CountriesList.mrn[position]);
holder.text3.setText(CountriesList.actualstart[position]);
holder.text4.setText(CountriesList.age[position]);
holder.text5.setText(CountriesList.gender[position]);
holder.text6.setText(CountriesList.wardNo[position]);
holder.text7.setText(CountriesList.roomNo[position]);
holder.text8.setText(CountriesList.bedNo[position]);

return convertView;
     }
     static class ViewHolder {
public Button btnList;
public TextView text8;
public TextView text7;
public TextView text6;
public TextView text5;
public TextView text4;
public TextView text1;
public TextView text2;
public TextView text3;
     }

  @Override
     public void notifyDataSetChanged()
  {
super.notifyDataSetChanged();
      }


    }