Attempting to call a toggle from a different layout

Question

Pretty much I have a Toggle filter on my main layout, and I have another class called settings, settings creates a different layout. I want to check if my filter is toggled on so that a button in my settings layout can have an if else statement on press.

public class MainActivity extends AppCompatActivity {
    protected void onCreate(Bundle savedInstanceState) {
         ToggleButton filterButton = findViewById(R.id.filter_button);
         TextView lightbulb = findViewById(R.id.lightbulb);
         if(filterButton.isChecked())
           lightbulb.setText("on");

in my settings class what I want to do is

public class SettingsActivity extends AppCompatActivity {
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_settings);
        Button useLightbulb = findViewById(R.id.useLightbulb); 

        useLightbulb.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
              if super(filterButton.isChecked()))  
                 super.lightbulb.setText("1 Light Bulb burnt out");
             }
        }

any help is appreciated, I'm still a beginner so please dumb it down for me because I dont know what I'm doing

Gabe Sechan · Accepted Answer · 2025-11-13 03:17:14Z

1

You don't do it like this. You don't access the views or layout of one screen from another- in fact they wouldn't exist. Instead, when the Toggle is pressed you would write the new value to some other place- a file, a shared preference, or even just a global variable. Then the other activity would check that value. Your UI shouldn't hold your state, your state should be held elsewhere and your view reflects it.

answered Nov 13 at 3:17

Gabe Sechan

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2 Comments

fahim Nov 13 at 4:16

OOOH that makes sense! how does one distinguish where the file you would be writing and reading to is located? from my experience its usually my name/documents or something also would I have to make some sort of command like on backpress refresh?

Gabe Sechan Nov 13 at 6:23

I'd probably just use a shared preference. A shared preference is a simple way of handling small data files of options like this. For that system, you just give it a name (whatever you want) and the shared preference system will do the storage for you (it writes it to a private data directory only your app can access). Then for reading it, just read it on the onResume of any Activity that needs it to get the current value.

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