How to prevent user from accessing navigation bar [PAX Device]

Question

I am currently working on an Android Launcher app for a PAX device.

minSDK: 25
Theme: Theme.Material3.DayNight.NoActionBar Manifest:

<activity
            android:name=".MainActivity"
            android:exported="true"
            android:launchMode="singleTask"
            android:theme="@style/Theme.ThemeName">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.HOME" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

I want to make sure that the user won't be able to leave the launcher app.

I tried setting flags on my MainActivity based on I found on related question: full screen application android

View decorView = getWindow().getDecorView();

        final int flags = View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_FULLSCREEN
                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;

        decorView.setSystemUiVisibility(flags);

I also tried using WindowInsetsController

        WindowInsetsControllerCompat windowInsetsController =
                WindowCompat.getInsetsController(getWindow(), getWindow().getDecorView());

        windowInsetsController.hide(WindowInsetsCompat.Type.systemBars());

Both is hiding system bars(navigation & status bar), But if you swipe down or up, the system bars will show, I want it to be still hidden.

Do I need to use a specific theme & or manifest configuration to do this? or if not, how can I achieve this.

NOTE: I used a launcher app from our partner that does exactly what I needed. The navigation bar doesn't show, even if I swipe down or up; only the status bar is visible. However, swiping down does not display the quick settings panel.

Answer 1

Using Neptune SDK/PAX SDK

private IDAL iDalService = null;

//Initialize SDK
try {

            iDalService = NeptuneLiteUser.getInstance().getDal(this);

        } catch (Exception e) {

            Log.e("Class Name", "Error initializing Neptune SDK, message: " + e.getMessage());
        }

public void hideBars() {

        if (iDalService != null) {
            //Disable Navigation bar.
            iDalService.getSys().enableNavigationBar(false);
            //Disable Status bar.
            iDalService.getSys().enableStatusBar(false);
            //Hide Navigation bar.
            iDalService.getSys().showNavigationBar(false);
            //Hide Status bar.
            iDalService.getSys().enableStatusBar(false);
        }
    }