Google Android - это несложно

Код: Выделить всё

Cursor contactCursor = BaseActivity.instance().getContactsCursor();
indexer = new AlphabetIndexer(contactCursor, contactCursor.getColumnIndex(Data.DISPLAY_NAME), " ABCDEFGHIJKLMNOPQRSTUVWXYZ");

public static Contact getContact(ContentResolver cr, Cursor cursor, int position) {
	try {
		cursor.moveToFirst();
		boolean success = cursor.move(position);
		if (!success)
			return null;
		
		String id = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Identity._ID));
		String name = getContactDisplayName(cursor);
		Uri photo = getContactPictureUri(id);
		InputStream input = getContactPictureInputStream(cr, id);
		
		Contact contact;
		if (input == null) {
			contact = new Contact(id, name);
		}
		else {
			Bitmap bm = null;
			try {
				bm = BitmapFactory.decodeStream(input);
			} catch (OutOfMemoryError oome) {}
			contact = new Contact(id, name, photo, bm);
		}
		
		return contact;
	} catch (Exception e) {
		
	}
	return null;
}
	
class ContactsListAdapter extends BaseAdapter implements SectionIndexer {
	private Bitmap bitmapUnknown;
	private List<Contact> contacts;
	private Cursor cursor;
	
	ContactsListAdapter(List<Contact> contactsList, Cursor c) {
		contacts = contactsList;
		cursor = c;
		
		bitmapUnknown = BitmapFactory.decodeResource(getResources(), R.drawable.unknown_small);
		Log.i("cl", "bitmapUnknown: " + bitmapUnknown);
	}
	
	public int getCount() {
		return cursor.getCount();
	}

	public Object getItem(int position) {
		if (position >= contacts.size()) {
			return contacts.get(position);
		} else {
			return contacts.get(position);
		}
	}

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

	public View getView(int position, View convertView, ViewGroup parent) {
		View view = null;
		Contact contact = null;
		do {
			contact = (Contact) getItem(position);
		} while (contact == null);
		
		if (convertView != null) {
			view = convertView;
		} else {
			view = mInflater.inflate(R.layout.contact_cell, parent, false);
		}
		
		TextView name = (TextView) view.findViewById(R.id.name);
		name.setText(contact.getName());
		
		TextView separator = (TextView) view.findViewById(R.id.separator);
		LinearLayout layout = (LinearLayout) view.findViewById(R.id.layout);
		if (getPositionForSection(getSectionForPosition(position)) != position) {
			separator.setVisibility(View.GONE);
		} else {
			separator.setVisibility(View.VISIBLE);
			separator.setText(String.valueOf(contact.getName().charAt(0)));
		}
		
		ImageView icon = (ImageView) view.findViewById(R.id.icon);
		if (contact.getPhoto() != null) {
			icon.setImageBitmap(contact.getPhoto());
		} else if (contact.getPhotoUri() != null) {
			icon.setImageURI(contact.getPhotoUri());
		} else {
			icon.setImageBitmap(bitmapUnknown);
		}
		
		return view;
	}

	@Override
	public int getPositionForSection(int section) {
		return indexer.getPositionForSection(section);
	}

	@Override
	public int getSectionForPosition(int position) {
		return indexer.getSectionForPosition(position);
	}

	@Override
	public Object[] getSections() {
		return indexer.getSections();
	}
}