public class SideBarView extends View
{
    private static final char[] alphabet = new char[] { 'A', 'B', 'C', 'D',
            'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q',
            'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '#' };

    public SideBarView(Context context)
    {
        super(context);
    }

    public SideBarView(Context context, AttributeSet attrs)
    {
        super(context, attrs);
    }

    public SideBarView(Context context, AttributeSet attrs, int defStyle)
    {
        super(context, attrs, defStyle);
    }

    @Override
    public void draw(Canvas canvas)
    {
        super.draw(canvas);

        canvas.drawColor(getResources().getColor(R.color.szary_ciemny));
        Paint paint = new Paint();

        final int textHeight = getHeight() / alphabet.length;
        final int width = getWidth();
        for (int i = 0; i < alphabet.length; i++)
        {

            paint.setColor(getResources().getColor(R.color.niebieski));
            paint.setTypeface(Typeface.DEFAULT);
            paint.setAntiAlias(true);
            paint.setTextSize(14);

            final float xPos = width / 2
                    - paint.measureText(String.valueOf(alphabet[i])) / 2;

            final float yPos = textHeight * i + textHeight;

            canvas.drawText(String.valueOf(alphabet[i]), xPos, yPos, paint);
            paint.reset();
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent event)
    {
        super.onTouchEvent(event);
        final float y = (int) event.getY();

        int idx = (int) (y / getHeight() * alphabet.length);
        if (idx >= alphabet.length) {
            idx = alphabet.length - 1;
        } else if (idx < 0) {
            idx = 0;
        }
        if (event.getAction() == MotionEvent.ACTION_DOWN
                || event.getAction() == MotionEvent.ACTION_MOVE)
        {
            dialogText.setVisibility(View.VISIBLE);
            dialogText.setText(String.valueOf( alphabet[idx]));
            if (sectionIndexter == null)
            {
                sectionIndexter = (SectionIndexer) list.getAdapter();
            }
            int position = sectionIndexter.getPositionForSection(alphabet[idx]);
            if (position == -1)
            {
                return true;
            }
            list.setSelection(position);
        } else
        {
            dialogText.setVisibility(View.INVISIBLE);
        }
        return true;
    }

    private ListView list;
    private SectionIndexer sectionIndexter;
    private TextView dialogText;

    public void setListView(ListView list)
    {
        this.list = list;
        sectionIndexter = (SectionIndexer) list.getAdapter();
    }

    public void setTextView(TextView mDialogText)
    {
        this.dialogText = mDialogText;
    }
}