public void setLabels(final String rowLabel, final String columnLabel) {
        binding.rowsLabel.setText(rowLabel);
        binding.colsLabel.setText(columnLabel);
        rotateTextView(binding.rowsLabel);
    }
returns actual matrix data. Do not change the returned array, it is for reading only!
main/src/main/java/cgeo/geocaching/ui/CheckboxMatrixView.java