RUT format in TExtview

I have the following Login class.

public class LoginActivity extends ProgressBarActivity implements LoginActivityContract.View {

private final static String TAG = LoginActivity.class.getSimpleName();

LoginActivityPresenter presenter;
LoginActivityContract.LifeCycle onLifeCycle;
LoginActivityContract.Action onAction;

public TextView login;
private TextView password;
private Switch login_recordar_rut;
private Button loginButton;

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

    TextView texto_version = findViewById(R.id.txt_version);
    String versionName = BuildConfig.VERSION_NAME;
    texto_version.setText(versionName);


    login = (TextView) findViewById(R.id.login);

    password = (TextView) findViewById(R.id.password);

    login_recordar_rut = findViewById(R.id.login_recordar_rut);

    loginButton = (Button) findViewById(R.id.login_button);

    final Activity padre = this;

    loginButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {

            View view = padre.getCurrentFocus();

            if (view != null) {
                InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
            }

            if (!login.getText().equals("")) {
                enableForm(false);

                String loginText = login.getText().toString().replaceAll("\-", "").replaceAll("\.", "");

                onAction.onLoginClick(loginText, password.getText().toString(), login_recordar_rut.isChecked());
            } else {
                showToolTipSB("Formato de Rut incorrecto...");
            }
        }
    });

    tannerApplication app = (tannerApplication) getApplication();

    presenter = new LoginActivityPresenter(this,
            app.getLocalStorage(),
            app.getServerAccessPointSDK(),
            app.getServerAccessPoint(),
            this);

    onLifeCycle = presenter;
    onAction = presenter;

      login.addTextChangedListener(new MaskWatcher(login.toString()));

}

public void enableForm(boolean isEnabled) {
    login.setEnabled(isEnabled);
    password.setEnabled(isEnabled);
}

public void setFocusBoton() {
    return;
}

@Override
protected void onResume() {
    super.onResume();
    onLifeCycle.onResume(getIntent());
}

@Override
protected void onPause() {
    super.onPause();
    onLifeCycle.onPause();
}

@Override
public void setLoginText(@NonNull String text) {
    login.setText(text);
}

@Override
public void setPasswordText(@NonNull String text) {
    password.setText(text);
}

@Override
protected int getLayoutId() {
    return R.layout.activity_login;
}

@Override
public void showContent() {
    super.showContent();
}

@Override
public void showProgress() {
    super.showProgress();
}

@Override
public void showToolTip(int msg) {
    super.showToolTip(msg);
}

@Override
public void showToolTipSB(String msg) {
    super.showToolTipSB(msg);
}

public void showToolTipSB(int msg) {
    super.showToolTipSB(msg);
}

@Override
public void startRegisterActivity(@NonNull Bundle extras) {
    finish();
}

@Override
protected boolean EjecutaronBackPressed() {
    return true;
}

}

As you can see, it calls MaskWatcher which is another class, passing the TextView login parameter.

The MaskWatcher class is as follows.

public class MaskWatcher implements TextWatcher {
private boolean isRunning = false;
private boolean isDeleting = false;
private final String mask;
private EditText rutNumber;


public MaskWatcher(String mask) {
    Log.i("MaskWatcher","String mask"+mask);
    this.mask = mask;
}

public static MaskWatcher buildCpf() {
    return new MaskWatcher(" ");
}

@Override
public void beforeTextChanged(CharSequence charSequence, int start, int count, int after) {

    isDeleting = count > after;
}

@Override
public void onTextChanged(CharSequence charSequence, int start, int before, int count) {
}

@Override
public void afterTextChanged(Editable editable) {



    String valortext = editable.toString();
    Log.i("MaskWatcher","Valor valortext"+valortext);
    if(valortext.equals(""))
    {
        Log.i("MaskWatcher","Valor valortext 0"+valortext);
        valortext = "0";
    }
    else
    {
        Log.i("MaskWatcher","Valor valortext !0"+valortext);
         FormatearRUT(valortext); //funcion que formateara el rut
    }
}
public  String FormatearRUT(String rut) {

    Log.i("MaskWatcher","FormatearRUT valor"+rut);
    int cont = 0;
    String format;
    rut = rut.replace(".", "");
    rut = rut.replace("-", "");
    format = "-" + rut.substring(rut.length() - 1);
    for (int i = rut.length() - 2; i >= 0; i--) {
        format = rut.substring(i, i + 1) + format;
        cont++;
        if (cont == 3 && i != 0) {
            format = "." + format;
            cont = 0;
        }
    }
    Log.i("MaskWatcher","FormatearRUT valorformat"+format);

    return format;

}

}

At the moment of entering a data in the TextView you need to give it the RUT format, but I can not find the way it is "printed in the TextView", how can I do it?