Develop Reference

Is it possible to display a bar on top of BottomSheet in Android

I am using a BottomSheet in my application, which contain some list items, and I am also using a Tab bar view in my whole application (at bottom of screen).
Is it possible and how can I display my that Tab Bar still in bottom of screen, and BottomSheet should also appear (on defined offset), but below my Tab Bar.
How can I adjust and arrange these layouts?

Please show Below link. Also you can add multiple tab bar in bottom layout.
https://material.io/design/components/bottom-navigation.html

Actionbar Push up relative to screen

I have achieved hiding and showing the actionbar on scroll however I have a few problems with it. 1.) when I click on a tab in my application that requires the action bar to be show then return to the screen where the action bar can be hidden, there is a white space that is the exact size of the action bar under the action bar. 2.) There is an annoying flicker sometimes when the action bar is being hidden or unhidden.
I have seen on many google applications and applications such as instagram where the action bar pushes up relative to the position on screen. I have searched for libraries or ideas on how to implement that technique but have not found any? Is there any way I can at least get rid of the actionbar flicker or is there a library where I can implement the actionbar push up on scroll in my application?

Put android tabs in center of action bar

I tried Android action bar with tabs. As you see in this picture:
(source: persiangig.com)
My action bar looks good in phones but in tablets it is not right, the tabs stick left. This picture shows what I mean, how can I put the tabs to center in tablets too?
(source: persiangig.com)

The tabs are aligned left because, in Android, the action bar is used for both navigation and Activity- or Fragment-specific actions. You don't have any in this screenshot, but menu actions that are added to the action bar will be aligned to the right.
If you must have your tabs centered for some reason, you'll have to write your own action bar. I would recommend against this, since it's a lot of work to intentionally go against user expectations. Instead, use Android's built-in action bar layout and design your app to accommodate it.

Two menus in android

I want to have two menus in my android app. First one is search icon in ActionBar (at the top) and second is a TextView and pop up item at the bottom. How to achieve it? I tried android:uiOptions="splitActionBarWhenNarrow" but it moves all the menu items to bottom. Please help!

Android has not made this possible on purpose, the action bar at the bottom (called the split action bar) only has the purpose of giving extra room for actions if it is necessary (hence the uiOptions name "splitActionBarWhenNarrow").
You could still get the desired result by manually creating a split action bar by adding a LinearLayout at the bottom of your View, and using a PopupMenu for the menu.

Customizing Bottom Action Bar in Android

I want to use the split Action Bar - one on top, one on bottom. I know you can call it with this:
uiOptions="splitActionBarWhenNarrow"
My 2 questions are simple concepts:
I would like only two items on the bottom; one on far left, one on far right. Is this possible? It seems to be almost an overflow and pushes everything up top -- down to the bottom. Is there a way to control what items will show up on which bar?
Also, I have holo.light.darkactionbar theme. Yet, for the bottom bar, it keeps the light background AND the white text so you can not see the icons - is it possible to apply dark background like the top bar?

I would like only two items on the bottom; one on far left, one on far right. Is this possible? It seems to be almost an overflow and pushes everything up top -- down to the bottom. Is there a way to control what items will show up on which bar?
Unfortunately not. All action items will be pushed on to the bottom bar when using the split action bar. One way to get around this would be to not use the split action bar, and have a custom view at the bottom holding buttons for all the items you want at the bottom. You'd probably be able to emulate the style of an split action bar fairly well using themes.
Also, I have holo.light.darkactionbar theme. Yet, for the bottom bar, it keeps the light background AND the white text so you can not see the icons - is it possible to apply dark background like the top bar?
This sounds odd and isn't standard behaviour (both bars are dark in my app), are you using a custom theme? If you want to override this manually, define a theme with a custom android:backgroundSplit value as shown on the Android Developers website.