FloatingActionButton

Description

Android floating action button which reacts on scrolling events. Becomes visible when an attached target is scrolled up and invisible when scrolled down.

Demo

Integration

1) Add as a dependency to your build.gradle:

dependencies {
    compile 'com.melnykov:floatingactionbutton:1.2.0'
}

2) Add the com.melnykov.fab.FloatingActionButton to your layout XML file. The button should be placed in the bottom right corner of the screen. The width and height of the floating action button are hardcoded to 56dp for the normal and 40dp for the mini button as specified in the guidelines.

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
             xmlns:fab="http://schemas.android.com/apk/res-auto"
             android:layout_width="match_parent"
             android:layout_height="match_parent">

    <ListView
            android:id="@android:id/list"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

    <com.melnykov.fab.FloatingActionButton
            android:id="@+id/fab"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom|right"
            android:layout_margin="16dp"
            android:src="@drawable/ic_action_content_new"
            fab:fab_colorNormal="@color/primary"
            fab:fab_colorPressed="@color/primary_pressed"
            fab:fab_colorRipple="@color/ripple" />
</FrameLayout>

3) Attach the FAB to AbsListView, RecyclerView or ScrollView :

ListView listView = (ListView) findViewById(android.R.id.list);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.attachToListView(listView);

Check the sample project to see how to use custom listeners if you need to track scroll events.

4) Add the namespace xmlns:fab="http://schemas.android.com/apk/res-auto" to your layout file.

• Set the button type (normal or mini) via the fab_type xml attribute (default is normal):

  fab:fab_type="mini"

  or

  fab.setType(FloatingActionButton.TYPE_MINI);

• Set the normal and pressed colors via the xml attributes:

  fab:fab_colorNormal="@color/primary"
  fab:fab_colorPressed="@color/primary_pressed"

  or

  fab.setColorNormal(getResources().getColor(R.color.primary));
  fab.setColorPressed(getResources().getColor(R.color.primary_pressed));

• Enable/disable the button shadow with the fab_shadow xml attribite (it's enabled by default):

  fab:fab_shadow="false"

  or

  fab.setShadow(false);

• Show/hide the button expliciltly:

  fab.show();
  fab.hide();
  
  fab.show(false); // Show without an animation
  fab.hide(false); // Hide without an animation

• Specify the ripple color for API 21+:

  fab:fab_colorRipple="@color/ripple"

  or

  fab.setColorRipple(getResources().getColor(R.color.ripple));

5) Set an icon for the FloatingActionButton using android:src xml attribute. Use drawables of size 24dp as specified by guidelines. Icons of desired size can be generated with Android Asset Studio.

Changelog

Version 1.2.0

• Respect an elevation set manually for the FAB;
• Don't emit a scroll when the listview is empty;
• Add an ability to attach normal listeners for scroll operations (thanks to Bill Donahue).

Version 1.1.0:

• Do not ignore negative margins on pre-Lollipop;
• Disable clicks on the FAB when it's hidden on pre-Honeycomb;
• Some shadow tuning.

Version 1.0.9:

• Support API 7;
• Fixed extra margins on pre-Lollipop devices;
• Fixed mini FAB size;
• Updated shadow assets to more accurately match 8dp elevation.

Version 1.0.8:

• ATTENTION! Breaking changes for custom listeners. Check an updated sample how to use them.
• Added support for the ScrollView;
• Significantly optimized scroll detection for the RecyclerView;
• Fixed laggy animation for a list view with items of different height;
• Added isVisible getter;
• Deleted deprecated methods.

Version 1.0.7:

• Updated shadow assets to better match material design guidelines;
• Make FabOnScrollListener and FabRecyclerOnViewScrollListener implement ScrollDirectionListener for easier custom listeners usage.

Version 1.0.6:

• Added support for the RecyclerView;
• Added ripple effect and elevation for API level 21.

Thanks to Aidan Follestad.

Version 1.0.5:

• Updated shadow to more accurately match the material design spec;

Version 1.0.4:

• Allow a custom OnScrollListeners to be attached to a list view;
• Work properly with list of different height rows;
• Ignore tiny shakes of fingers.

Version 1.0.3:

• Add methods to show/hide without animation;
• Fix show/hide when a view is not measured yet.

Applications using FloatingActionButton

Please ping me or send a pull request if you would like to be added here.

Icon	Application	Icon	Application
	Finger Gesture Launcher		Vocabletrainer
	Lanekeep GPS Mileage Tracker		Score It
	Перезвони мне		App Swap
	QKSMS - Quick Text Messenger		Uninstaller - Beta Version
	Device Control		Confide
	Date Night		Jair Player The Music Rainbow
	Taskr - Lista de Tareas		Festivos: ¡Conoce el mundo!
	nowPaper		Vicious chain - Don't do that!
	My Football Stats		The ScoreBoard
	NavPoint		Just Reminder
	Early Notes		Ranch - Smart Tip Calculator
	Thiengo Calopsita		Tinycore - CPU, RAM monitor

Links

Country flag icons used in the sample are taken from www.icondrawer.com

License

The MIT License (MIT)

Copyright (c) 2014 Oleksandr Melnykov

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.