How to change the onscreen button - android

I looked for the question everywhere on the Internet but can't find the answer. What I found is to hide the whole button tray all together.
When the keyboard is down, the button is shown as in the picture.
But when the keyboard is showing the icon changes to -
My problem is to change the button (as in the second image), when my emoticons are showing. So, is there any way by which I can programatically change the button on an event and change it back on another event?

I'm afraid this is not possible yet. Perhaps this will be implemented in later versions of Android.
Not all devices have an onscreen navigation bar, a lot of devices still have hardware buttons.
Nevertheless, you'll might find this article interesting: http://arpitonline.com/blog/2014/07/27/improving-androids-navigationbar/

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.NET MAUI Entry keyboard does not hide

I have a very simple UI that has one entry control to enter phone number and a button. The entry control has a handler for removing border around it. When the entry control got focus, keyboard pops up. But when I try to tap outside the entry control such as on the screen empty area, the keyboard does not dismiss and the entry control does not lose focus. Also since the button is at the bottom of the screen, therefore, the soft keyboard hides it and there is no way to tap the button. The button can only be tapped if I press the Android device back button.
At present, I have not checked this behavior on an iOS device.
This was not a problem in Xamarin Forms though. I searched a lot on Internet and found that it is currently a bug in MAUI.
I tried to attach a tap gesture on the parent layout control and invoked platform-specific code to hide the keyboard but it seems the entry does not lose focus and in turn the tap gesture event is never called.
However, the entry control should lose focus automatically when I tap outside the entry control (such as on the screen) and the soft keyboard should automatically dismiss.
Please provide a workaround if there is any.
Known bug. Removing the focus sometimes helps. Sometimes you need to do Disable/Enable in sequence. (I go with the second).
If you want, you can read this for example:
https://github.com/dotnet/maui/issues/12002
(Most disturbing part, considering this is know bug for half year+)
We can leave the behavior how this is for now in NET7 and provide an
API in NET8 that lets users toggle this behavior on/off for iOS and
Android

Add property content description in back button android navigation bar

I'm implementing talkback descriptions in my app, and I want to know if is posible add content description in this button.
I'm searching information, but I don't know how to looking for exactly.
TalkBack should already say "Back Button" whenever you focus on the button you highlighted above.
As for changing the contentDescription to whatever you want, I don't think this is possible especially since not all devices have this button anymore -- See some of the new Pixel devices as an example.

How to make in app custom keyboard behave like a system keyboard?

I have an in app keyboard that tries to behave like a system keyboard. So far it pops up from the bottom using Bottom Sheet, which is great.
However, unlike a system keyboard, it does not push the entire layout up when you select an EditText that might otherwise get hidden. So far all the solutions I saw on StackOverFlow seem to be about Soft/System Keyboard not an in-app implementation like mine.
Here is my activity with 3 Edit Texts
This is what happens if I click on the last Edit Text. It gets covered by the keyboard in blue
This is how I want it to be. Everything getting pushed up.
How can I achieve this?

How to Intercept the keyguard(software menu) clicks for eg "Settings" menu option click?

Is there a way to find out when did a user click "Setting" options on the screen menu?
The onClick listner's KeyDown events catches only the hardware buttons on the phone and not the clicks of the sofware keyboard that shows up when a textbox/editText gets a focus and the key guard shows up.
Is it even possible using public android SDK.
P.S. : I am only concerned with 2.2 and 2.3 so its fine if this is not possible on 3.0 and above.
Thnx
EDIT
Explanation of a scenario that will help understand the question better!
I have a full screen activity with a editText and a button. I want to intercept all the clicks that a user make and based on that make some decisions.
I am able to register a listner to intercept what phisical keys are being clicked(HOME, MENU, VOLUME UP/DOWN etc)...The problem is, when the user clicks on the editText i.e. the text box gets the focus, the sotware keypad shows up. Now I also want to intercept what keys(numbers, alphabets, special characters or even custom functions on some samsung android phone like 'Go To Settings' are clicked and perform action based on the clicks.
My question is, is it possible and if yes, then how?
NOTE: Please dont ask me why am I doing this because its bad user experience. I am very much aware of that. I am trying to do this in a particular context that needs this functionality. Thnx!
You need to use the KeyListener class and setKeyListener
http://developer.android.com/reference/android/widget/TextView.html
This only allows you to modify/filter input into the TextView.

Stopping the Android Soft Keyboard flashing black switching activities

I'm working on an app and have a small problem when the soft keyboard is shown before switching activities. This happens when:
The user hits the search button
They enter a search term, view the search in a new activity and then return to the previous page
When the user returns to the previous page, a black box flashes where the soft keyboard was and then returns to normal
If the list is turned off or empty this problem never manifests. I have tried to enable caching of the listview children, hiding the listview when the activity pauses but to no avail. I would really appreciate any insight into why this might be occuring.
Thanks,
Laurence
Thought I'd follow up.
This problem was specific to pre Android 3.0 devices. On HC, ICS and JB this is no longer exhibited. As simple way to get around this on older versions of Android is to just change the windows background to match the color of your view. It still is blanked out but no where near as noticeable as black on white.

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