What are uses of Floating Action Button in Material Design Android - android

Floating Action Button in Material Design is more prevalent in major apps, what are the specific use cases where FAB is more better choice.

Floating action buttons are used for a special type of promoted action. They are distinguished by a circled icon floating above the UI and have special motion behaviors related to morphing, launching, and the transferring anchor point.
Floating action buttons come in two sizes: the default and the mini. The size can be controlled with the fabSize attribute.
for more detail visit this : https://developer.android.com/reference/android/support/design/widget/FloatingActionButton.html

"A floating action button represents the primary action in an application."
Example action - add new contact for contact list view.
https://www.google.com/design/spec/components/buttons-floating-action-button.html

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Mixing bottom app bar and floating action button (FAB)

I want to use BottomNavigation and FloatingActionButton at the same time in Android and there is nothing like this in google material components and also I didn't find any third party library which implements something like this. Attached GIF demonstrate what I want to implement. In fact I want a bottom navigation that one of its tabs has a FAB which placed on the navigation bar and the FAB disappears when another tab is selected.
See the attached image here.
You won't find a Material component for the layout in your example since it's counter to the Material Design Spec.
Floating Action Button (FAB) represents the primary action of a screen
The example would provide multiple "primary" interactions since its mixed with navigation. I would not recommend using the FAB in the context of a bottom navigation bar. Instead, separate them visually for the user's benefit by moving the FAB up and to the right of the page. Here are the Material Docs for Extending the FAB
Now you don't have to follow the Material Spec BUT you shouldn't expect pre-built Material components to ignore it.

Alternative to using multiple FloatingActionButtons?

Right now I am using three FloatingActionButtons to represent add, save, and reset operations. However according to Material Design guidelines, you shouldn't use more than one such button: https://material.google.com/components/buttons-floating-action-button.html
What is the accepted practice? Is there another sort of bar that is better for holding onto multiple functionality buttons?
I would suggest using a single action button that transforms into related actions, i.e., add, save and reset.
So you'll have something like this after the floating action button was pressed:
If you choose to do this you might want to check out this:
Morph floating action button into related actions
Another option could be transforming the floating action button into a toolbar like this:
In that case you will want to check this out:
Floating Action Button expansion

Android : Difference FloatingActionButton and normal button

I have tried demo FloatingActionButton. I don't see real differences why I should change from normal button class to FloatingActionButton because if I want to make round button, I can try this tutorial:make circular button
As definition of Android Document:
Floating action buttons are used for a special type of promoted
action. They are distinguished by a circled icon floating above the UI
and have special motion behaviors related to morphing, launching, and
the transferring anchor point.
Floating action buttons come in two sizes: the default and the mini.
The size can be controlled with the fabSize attribute.
I think everything here I can implement easily in normal button such as size, circle, above UI. Just one thing I don't understand:
special motion behaviors related to morphing, launching, and the
transferring anchor point
I don't really know this. What does it mean about morphing lauching and transfering anchor point. Please explain for me.
thanks :)
There is a nice article about Floating Action Buttons at Google's Material Design Guidelines: https://www.google.com/design/spec/components/buttons-floating-action-button.html There is a lot of examples about how you can (and should and shouldn't) use the Floating Action Button at activity transitions and how it can be used to create nice, meaningful and logical animations.
If you use the correct Floating Action Button (the one from the Support Design library) together with CoordinatorLayout, it will also take care of Snackbars. When a Snackbar appears, the Floating Action Button will move up in order not to be covered by the Snackbar. You can check it out here: http://android-developers.blogspot.cz/2015/05/android-design-support-library.html

Android - Action Bar Style

I want to show Action Bar like below.
I have already used this library clickhere
But it takes only two icons on Action Bar. If I add four items, then last two are shown me like menu. I want all in Action bar same as image above.
Is it possible? if yes, then HOW? Can I change Action Bar color or its default style available in Device?
Thanks in Advance.
I recommend you use this:
http://jgilfelt.github.com/android-actionbarstylegenerator/
to style your ActionBar.
If you want all the 4 icons to be there, just add this attribute to all the menu items:
android:showAsAction="always"
hello try this library
it sure help you And you may have to add you own logic to handle this in below 2.3 Android OS and above 3.0 Android OS.
there is many demo sample available like below :
There is no way you can be sure of the number of icons displayed in the action bar. There is a large varierty of Android devices out there and they all have different screen sizes. That's why you have to prioritize the actions available in a menu : the most important will be displayed as actions in the action bars and the others will be displayed in the "menu" : the action overflow.
You should think of actions in a functional way, not a graphical way.
With ref to Image that you attached you should decide which design pattern you want to use in your application, there are many UI patterns available for mobiles, tablets. The image you attached looks like Side Navigation UI pattern. It's better you decide which UI pattern perfect for your app.. then start implementing it with custom action bar libs (if you want action bar in less than Android 3.0 ver) or any other.

Can i hide the App Icon from the Action Bar in Honeycomb?

I am currently planning the honeycomb update for my app and i am wondering how to use the Action Bar correctly. My first question is if it is possible to hide the App-Icon and Title from the Action Bar.
And is there any kind of Design guidline for the Honeycomb-UI yet?
Yes, you can hide the app icon and title. You can also replace the app icon with a wider logo image for your activity.
The app icon/logo at the left is collectively treated as a "home" affordance. You can optionally ask the system to display it as "up." When tapped, this should take the user either to a home/landing page for your app or one level up in the app's navigation hierarchy, respectively.
This complements the system back button by providing a consistent way for the user to move around your app when the history associated with the back button might be complex. (For example, the user might have been deep-linked into your app through a notification or an intent from another application.) By using this pattern your app won't need to hijack the normal behavior of the back button in special cases for convenience.
The action bar does double duty in the form of action modes. The two APIs are orthogonal but the resulting UI occupies the same screen real estate. An action mode presents a set of contextually relevant options to the user as a customized action bar. For example, a user might select several items from a list at a time. The app might present an action mode to let the user take a bulk action on the set of all selected items such as delete or share.
Action modes are a great way to present contextual actions that doesn't stop the user from interacting with the rest of the UI the way that popup menus do.
Design guidelines will hopefully be published "soon." :)

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