This sample shows transforming of floating action button into a toolbar upon press or from a toolbar upon scroll. The toolbar can contain different items, such as text, buttons, search fields, or any other items that would be useful at hand.

Moreover, this sample has implmentation of FAB animation(fading in and out) when the user scrolls down or upwards.

When the user presses the button, it goes down and inflates another layout which contains all important stuff. You can add listeners and work with the inflated layout as with plain ViewGroup.

In order to imitate motion of the button, when it goes down or up, I used a curved motion concept, you can check it out in this video.

First of all, import the expandable-button module into your project, then follow these steps:

1. Specify the view in your XML file:

    `<com.popularmovies.vpaliy.bottomtoolbar.ExpandableButtonView
       android:id="@+id/expandableButton"
       android:layout_alignParentBottom="true"
       android:layout_alignParentRight="true"
       app:button_icon="@android:drawable/ic_menu_share"
       android:layout_alignParentEnd="true"
       android:layout_marginEnd="16dp"
       android:layout_marginRight="16dp"
       android:layout_marginBottom="16dp"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content">
   </com.popularmovies.vpaliy.bottomtoolbar.ExpandableButtonView>

   You need to specify the margins of the button. Also note that layout_width and layout_height should be wrap_content.
   You can specify the width and height of the button by using: app:button_width and app:button_height

2. Then go ahead and add some buttons, for example:

   ButtomItem item=new ButtonItem.Builder(context)
                      .setImageResource(R.id.image)
                      .setClickListener(listener).build();
   expandableButtonView.addItem(item);
   

Or

  
   expandableButtonView.addItem(new ButtonItem(context)
                                .setImageResource(R.id.image)
                                .setClickListener(listener));

The items which have been added to the ExpandableButtonView will always be in the center.

3. So far I have written only a listener for a RecyclerView so it works only with that.

   recyclerView.addOnScrollListener(new ScrollListener(expandableButtonView));

However, there is a method removeBottomToolbar which folds the toolbar back, so you use that every time you need to return to the button view.

Add it in your root build.gradle at the end of repositories:

allprojects {
  repositories {
     maven { url 'https://jitpack.io' }
  }
}
  

Add the dependency

dependencies {
	compile 'com.github.vpaliyX:Expandable-Action-Button:v1.0'
}

You're good to go!

MIT License

Copyright (c) 2017 Vasyl Paliy

Permission is hereby granted, free of charge, to any person obtaining a copy
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