Android developer portal with tools, libraries, and apps
QButton - an Easy to use, customizable button for Android.
A configurable and animated material loading button.
If you're an RxJava fan as I am this button will come you really handy.
A custom button with beautiful customisable shadow.
A custom SignInButton for Android that supports 'android:text' attribute, currently not supported by Google's original 'SignInButton'. This library also allows to set button theme to dark or light and is based on Google guidelines.
A segmented control for android, with a lot of customization properties.
Easy to use night mode button with cool day and night animation.
Timer button is a countdown enabled button which can be used to disable user interactions while showing a timer on top of it.
An Android library to create similar buttons to Medium clapping effect with few lines of code and lots of customization.
An easy to use TextButton when you need a TextView-like button, with handy touch feedback effects.
It has one view DownloadButtonProgress. This is a combination of button and progress bar. There are 4 states in this view: Idle, Indeterminate, Determinate and Finish. It makes you easy to manage download button state in your app.
Easy creation and management of toggle buttons from the Material Design spec. Similar functionality to iOS segmented controls, and works great alongside them on Android.
Copy button. Helps to copy textview into clipboard and can be used in anywhere.
It's AppCompatButton with centered text and icon. Allows you to add icons to left, right, and both sides.
Instagram-like button for taking photos or recording videos.
A library for Android developers who want to create "push down animation click" for view like in Spotify application.
React Button is a library to create a button like in Facebook app.
This library lets you to create a button with animation like Twitter's heart or Facebook-like button in the simplest way.
Animating swipe button for Android with a circular progress bar for async operations.
This is a library which allows you to create a record button view in android.
Beautiful Fancy Button on endorphins.
Icons, Borders, Radius for Android buttons with selectable 16 Icon Fonts precompiled! No need to manually using  for icon font character anymore!
Android Block style Button.
BlockButton is an extension of LinearLayout (thinking of extending RelativeLayout too..) hence, orientation should be set.
Library of an android button activated by swipe.
Easy to use. Make your app look great Better UX in sensitive button
An Android library to easily implement compound buttons, radio and check boxes. It supports also a grid visualization.
This library is beautiful switch widget with sticky animation.
A custom ImageButton that invoke onClickListener only when touch is inside the circle not outside (rectangle area of button).