Selection persists after ACTION_PROCESS_TEXT activity finishes

Question

I'm trying to create a small strikethrough application for myself. The idea is simple: select the text, select the MStrike option in the floating menu that appears and then continue typing.

Except that after I press MStrike the still remains selected. Yet, while pressing other options (such as 'Copy') the text doesn't remain selected. I've tried searching Google, StackOverlow and Reddit but I didn't get any answer.

Here are some parts of my code if it's of any help:

public class MainActivity extends Activity {
    public String editedText;
    public boolean readOnly;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Intent intent = getIntent();
        if (intent.getAction() != null && intent.getAction().equals(Intent.ACTION_PROCESS_TEXT)){
            String selectedText = intent.getStringExtra(Intent.EXTRA_PROCESS_TEXT);
            readOnly = intent.getBooleanExtra(
                    Intent.EXTRA_PROCESS_TEXT_READONLY,
                    false);
            //function to Strikethrough the text
            editedText = editText(selectedText);
        }

        finish();
    }

    @Override
    public void finish(){
        if (readOnly){
            ClipboardManager clipboardManager =
                    (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
            ClipData clip = ClipData.newPlainText(
                    "StyleText",
                    editedText
            );
            clipboardManager.setPrimaryClip(clip);
        }
        else {
            Intent back = new Intent();
            back.putExtra(Intent.EXTRA_PROCESS_TEXT, editedText);
            setResult(RESULT_OK, back);
        }
        super.finish();
    }
}

p.s. I'm still a beginner so my code might be not well-written. I'm open to any suggestions you have.