Immersive mode navigation becomes sticky after volume press or minimise-restore

Question

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        this.getWindow().getDecorView().setSyste         


        

Answer 1

I had the same problem, and I solved it with a simple workaround. Even though I couldn't find the theoretical reason of this workaround, but it worked for me anyway.

It seems like when a volume button is pressed, the 'flags' related to the 'immersive mode' are cleared. And I think that's why the immersive mode is disabled and the immersive mode is not restored automatically.

Therefore, I tried to set the 'flags' after pressing the volume button with 'runnable' object.

So, it works like this:

immersive mode -> volume button pressed(flags cleared) -> 500ms later, the runnable object sets the flags again -> immersive mode restored

1. First, define the runnable object to set the flags

private Runnable decor_view_settings = new Runnable()
{
    public void run() 
    {
        getWindow().getDecorView().setSystemUiVisibility(
                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);
    }
};

2. Post the runnable object with some delay to a handler when a volume button is pressed

private Handler mHandler = new Handler();

...

@Override 
public boolean onKeyDown(int keyCode, KeyEvent event) 
{
    if(keyCode == KeyEvent.KEYCODE_BACK)
    {
        finish();
    }
    else if(keyCode == KeyEvent.KEYCODE_VOLUME_DOWN || keyCode == KeyEvent.KEYCODE_VOLUME_UP)
    {
        mHandler.postDelayed(decor_view_settings, 500);
    }

    return super.onKeyDown(keyCode, event);
}

I just delayed it for 500ms with no reason, it's not important.

3. The basic code for immersive mode with runnable object

@Override
public void onWindowFocusChanged(boolean hasFocus) 
{
    super.onWindowFocusChanged(hasFocus);

    if(hasFocus) 
    {
        mHandler.post(decor_view_settings);
    }
}

It worked perfectly on my app.

So, when I press a volume button, the immersive mode is disabled and the volume rocker pops up.

after a few seconds, the volume rocker disappears and so does the status bar and the navigation bar.

Hope this work for you.