.setText(" text ") is not working properly in android studio

I am new to android development I want to create an app that transforms light mode to dark mode I have a button called enable dark mode I want to enable the dark mode when I press that button, I turned the dark mode ON but I also want to change the text in the button to enable light mode after clicking the button. when I use the setText() method to change the text in the onclick method the text in the box changes only when I press the button 2 times but I want the text to change instantly after pressing the button for the first time Here is my java code

public class MainActivity extends AppCompatActivity {

    private Button darkmode;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        darkmode = (Button) findViewById(R.id.darkmodebutton);

        darkmode.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
                darkmode.setText("enable light mode");
            }
        });
    }
}

can anyone help me, please here is how the app is behaving I made a gif

I think the app lifecycle resets when the theme is changed. You can use a lifecycle aware state variable to track the theme state.

You can read more about it here.

Boolean isLightThemeEnabled = false;

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

    if (savedInstanceState != null) {
        theme = savedInstanceState.getString("THEME_KEY");
    }

    // YOUR USUAL CODE
    // MAKE SURE TO UPDATE THE THEME STATE VARIABLE
    
}


@Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
    if(!isLightThemeEnabled) {
         darkmode.setText("enable light mode");
    }
    else {
        .....
    }
}


@Override
public void onSaveInstanceState(Bundle outState) {
    outState.putString("THEME_KEY", isLightThemeEnabled);
    
    super.onSaveInstanceState(outState);
}