Why is onMenuOpened is not called? - android

An app hides the action bar in the following way:
uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
//Hide both the status bar and navigation bar
getWindow().getDecorView().setSystemUiVisibility(uiOptions);
When the screen is touched, the following method is called to show the action bar:
uiOptions = View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
decorView.setSystemUiVisibility(uiOptions);
Everything works as expected except when the overflow menu is opened after the 3-dot is tapped, onMenuOpened of the activity is not called, but the menu is opened normally.
Could anyone shed some light on this?


Possibly this.
The reason that onMenuOpened() and onPanelClosed() are not called is
that Activity's default implementations of those methods will try and
init the framework Action Bar.

Related

How to show ActionBar when exit full screen by swipe down?

mContext.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
I am using the above codes to hide enter the full screen mode. It can be exited by swiping back, top or bottom. However, the Action Bar remains hidden, while the status bar and navigation bar appears (Picture 2).
How can I bring up the ActionBar ? Or detecting the "Exit" (Picture 3) event listener so that I can call the following to show ActionBar?
mContext.getWindow().getDecorView().setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
);
Due to design requirement, I can't use the touch listener to bring up the ActionBar() in this case.

Status and navigation bar showing when scrolling Recycler view in immersive mode

I'm implementing immersive mode using this code:
activity.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
);
But the problem is as I scroll the recycler view, the status and navigation bar are shown as an item view reaches the top. It's hard to explain but here's the gif:
https://giphy.com/gifs/xT4uQiBlagrD9ljQqc
Note that as an item view approaches the top, the status bar is shown (only the dark background is shown though). Note also the navigation bar as an item view's bottom reaches the boundary of the navigation bar (notice the gray background at the bottom).
This happens for every item in the recycler view which is really annoying.

It's missing you some UI options like immersive sticky.
Here's my working ui options:
View decorView = getWindow().getDecorView();
int uiOptions = 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(uiOptions);

Navigation bar is not transparent in landscape mode over KitKat(4.4)

How do I make the navigation bar transparent in landscape?
It works in portrait.
My device version is Kitkat(Nexus5)
The Youtube Kids works in KitKat.

I solved this problem.
We cannot set a color to navigation bar in landscape under lollipop.
But we can set transpalent temporarily these version.
You set the flag which is View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY.
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 // hide nav bar
| View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);

Unable to show the action bar with SYSTEM_UI_FLAG_LAYOUT_STABLE

I am unable to show the action bar when SYSTEM_UI_FLAG_LAYOUT_STABLE is used as following:
getWindow().getDecorView().setSystemUiVisibility(
View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
I use getSupportActionBar().show() and getSupportActionBar().hide() to show or hide the action bar. If SYSTEM_UI_FLAG_LAYOUT_STABLE is taken out from the above code, everything will be fine - the action bar can be shown or hid without any problem.
Could anyone shed some light on this?

When Using Immersive Mode a line appears

I'm trying to use the immersive mode introduced in Android 4.4. I use this code to set the visibility and it works exactly how I want it to:
View decorView = getWindow().getDecorView();
int uiOptions = //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 // hide nav bar
| View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
decorView.setSystemUiVisibility(uiOptions);
However, it puts a line on the display. I have a screenshot but cannot post it because this is my first question. I have no idea what it is or how to get rid of it. Can anyone help?

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