Floating button that overlaps in all applications - flutter

I am learning flutter, and I found myself with the task of creating a floating button, that by minimizing the application the button is visible and overlaps any application, is it possible to create this functionality in flutter?

You should use Scaffold and there's a parameter called floatingActionButton. There you can add a button and it definitely won't overlay anything. You should also search for SafeArea and Listview/SingleChildScrollView. These are great widgets for avoid overlays. Flutter has a great documentation so you can always look up a widget in google and there will be always something.

Related

Is there a widget on flutter that can pop up above bottom navigation, with gradient background?

I inherited a project in flutter and I need to create or use a widget that will allow me to display information throughout the entire app. The graphic design that I want to follow has a background with a gradient of colors.
My question is, is there any widget that can appear just above a browser menu at the bottom of the application, that can comply with this type of design?
I have tried with snackbar but I have not found a way to put the gradient background and I tried with flushbar but when it opens (and allows the user to close it) it does not allow navigation.
I've tried "getx" but it does not go well with the rest of the app, because its an already big application with materialApp.
I'm expecting something that can act as a snackbar but have gradient background.

Is there any way I can implement pull down appbar in flutter?

Can anyone suggest to me how can I build a pull-down appbar. I searched the whole net but can't find any idea regarding this. It would be great if anyone could guide or suggest to me to build the appbar.
Edit:-
Many developers are saying to use SliverAppBar. SliverAppBar basically collapses the app bar when we scroll up the listview or any other widget, whereas I want an app bar that pulls down i.e when we tap the app bar and scroll it down only the app bar grows on top of the body. So basically when we navigate to the home screen the app bar should look like the second referred image i.e it must be closed. But we can pull down that appbar to view the hidden contents of the appbar. I am attaching an image for reference.
I Think what you mean what pull down App is an Appbar that expands try.
the silver Appbar
https://youtu.be/mSc7qFzxHDw

How to make floating overlay widget, looks like facebook chat head in flutter?

How to make floating overlay widget, looks like facebook chat head in flutter??
Flutter floating overlay widget
i need help guys, What i do now?
What i'am doing picture
You can create a draggable chat button by checking below link. But it will be inside the application.
Inside app - https://medium.flutterdevs.com/draggable-floating-action-button-in-flutter-2149a7e47f06
If you want to draw the draggable view outside the application, check https://pub.flutter-io.cn/packages/system_alert_window plugin. Here, you need to do minor tweeks.
Apart from this, other approach is to write the code in native and access it to flutter via method channel
For native - https://medium.com/#kevalpatel2106/create-chat-heads-like-facebook-messenger-32f7f1a62064

Flutter Progress Text Button

Looking for a widget similar to the answer by NiklasPor in this question here. The whole idea fits my needs - have a button that changes border drawn based on how long the button is held. The problem is that the CircularProgressIndicator is used here. I need on hold feature and border drawing to be compatible with the TextButton widget, for example. Basically, I want a TextButton to execute a function if it is held long enough. Any ideas how to start with this? I am thinking of also using the GestureDetector widget.
Have you tried this package: square_percent_indicator

Implement next,previous,home page,share button throughout my flutter app

1.I have created a lesson app USING FLUTTER in which I want to implement next,previous,share & home button in each page...How can I do this
2.I need your help
If you have a scaffold, this will have an appbar and you place the actions in the appbar with icon buttons.
A scaffold also has a body which can be a pageview which in turn, can hold your various pages.
Depending on the app, you might get the pageView or a gestureDetector to give you swipe left and right for your previous or next.