Gets a ContentProvider instance and searches through the ContactsContract in order to obtain the own user's contact

Get account name from ContentProvider

public void setAccountNameOnEditText() {
    Cursor c = getActivity().getContentResolver().query(ContactsContract.Profile.CONTENT_URI, null, null, null, null);
    int count;
    String[] columnNames;
    int position;
    final ArrayList<String> listNames = new ArrayList<>();
    try {
        count = c.getCount();
        columnNames= c.getColumnNames();
        c.moveToFirst();
        position = c.getPosition();
        if (count == 1 && position == 0) {
            for (String columnName : columnNames) {
                String columnValue = c.getString(c.getColumnIndex(columnName));
                if (columnName.equals("sort_key") || columnName.equals("display_name")
                          || columnName.equals("display_name_alt") || columnName.equals("sort_key_alt")) {
                          listNames.add(columnValue);
                }
            }
        } else {
            Toast.makeText(getActivity(), getString(R.string.error_no_name), Toast.LENGTH_SHORT).show();
        }
        c.close();
    } catch (NullPointerException e) {
        e.printStackTrace();
        Log.e(TAG, "Could not get Cursor from ContentResolver, NPE :(");
        throw new NullPointerException("Could not get Cursor from ContentResolver");
    }
    if(!listNames.isEmpty()) {
        etNombreMultado.setText(listNames.get(0));
    } else {
        Toast.makeText(getActivity(), getString(R.string.error_no_name), Toast.LENGTH_SHORT).show();
    }
}