Material Design implementation for Android 2.1 and newer. This is not the exact copy of the Lollipop's API and features. It's a custom implementation of the most useful things as shown in the design specification. The library also features some additional non-standard extensions, like rounded corners for layouts or a Divider view for easy divider creation.

• realtime, animated shadows
• the touch ripple
• an elevation system (changing z order changes view rendering order)
• rounded corners
• SVG rendering
• a floating action button view
• text appearances, sizes, colors and many more useful definitions
• roboto and roboto condensed fonts for buttons and text fields
• predefined animation styles and visibility change animations
• a saturation/brightness/alpha fade for ImageView
• Divider, StatusBar and NavigationBar drag&drop view
• dark and light themes in standard and AppCompat versions
• a radial transition animation
• circular progress indicators
• CardView with real shadows and rounded corners
• state animators
• debug mode showing draw and hit areas when in edit mode
• tab strip with animated underline
• fading edges
• checkboxes and radiobuttons

Add the following line to dependencies:

compile 'tk.zielony:carbon:0.7.0'

And these two lines to android/defaultConfig:

renderscriptTargetApi 20
renderscriptSupportModeEnabled true

In case of any problems with these check the sample app.

I have an old Galaxy S with Android 2.3, so I did that to support my own phone. It's also fun to push the limits. Android 2.1 should work, the code compiles, but I have never checked that.

Seems like it's pretty stable. I'm testing it heavily on different devices and on real projects. There are minor problems with SVG rendering and shadow generation. Also the themes aren't perfect yet. These are the issues I know about. If you have something else, please let me know.

No. Maybe one day.

Done!

I thought about it, but it's not that easy, because almost everything is tightly integrated with other components. For example the ripple. Due to clipping issues in Android < 5.0 it's not possible to draw borderless backgrounds just by setting the background drawable. That's why I would have to export the ripple with all layouts only to make the borderless mode work.

If you wish, you can copy RippleDrawable.java to your project and integrate it with your code manually.

If it's possible and reasonable, sure! Just let me know.

You have to add these lines to your android build config:

renderscriptTargetApi 20
renderscriptSupportModeEnabled true

Carbon uses RenderScript for generating shadows. Gradle doesn't support renderscript very well, so it has to be done that way.

Debug mode is a special rendering mode used for UI/UX debugging. Some of material components have touch areas larger than the actual components. It means that a user can tap outside a view and still trigger an action. Using debug mode you can preview all touch and draw areas in the editor. Red rectangles show hit areas, green rectanges - draw areas. Debug mode is also useful for SVG views debugging. SVG views appear empty, because SVG rendering is not supported in the editor.

To enable the debug mode, add the following line to your theme:

<item name="carbon_debugMode">true</item>

Then go to the editor and pick that theme to be used by the editor. You can create two themes, with and without the debug info, so you can switch between them.

<style name="AppTheme" parent="carbon_Theme.Light">
    <!-- Customize your theme here. -->
</style>

<style name="AppTheme.Debug">
    <item name="carbon_debugMode">true</item>
</style>

• added ripple fade in,
• updated CardView,
• fixed edge effect color,
• fixed setting ripples and backgrounds,
• added transformations support for shadow casting,
• fixed rounded corners and animations on hardware accelerated devices,
• fixed elevation bug

• fixed issues with checkboxes and radiobuttons,
• added colorstatelist support to checkboxes and radiobuttons,
• fixed issue with z-order

• fixed issues with pagertabstrip, listview and edittext,
• added tab builder to pagertabstrip

• added CheckBox and RadioButton,
• added ListView, ScrollView and HorizontalScrollView with correct edge effects

• merged circular and bar progress, added bar modes,
• textAllCaps compatibility mode,
• added up arrow to toolbar,
• software shadows,
• added ripple to CardView,
• tuned calculator a bit,
• working on edge effects for listview and scrollview,
• Carbon themes extend correct Android and AppCompat themes,
• fixed bugs: animations for progress bars, correct text appearance handling, styles and super constructor calls

• added PagerTabStrip widget,
• started working on fading edges,
• added ripple sample to the animations activity,
• formatted the code,
• fixed bug with views visibility animation

• added GridLayout,
• rearranged the sample app,
• started working on calculator demo,
• added progress bar demo,
• added debug mode,
• color state list can now be passed as a filter color of SVGView,
• fixed bugs: uninitialized state animator list, window not attached to windowmanager

• fixed bugs: setting corners for layouts, drawing 0dp views, null hotspot

• added ripple styles, demo and more ripple settings,
• added state animators,
• cleaned up a bit,
• fixed bugs: setting background color, RelativeLayout's drawing

• added CardView and a sample,
• added a sample and a style for flat buttons,
• fixed rounded corners in layouts

• CircularProgress in and out animation,
• shadows improvements,
• elevation bugfix,

• namespace changed to just 'carbon' - less to write in xml,
• uploaded to Maven repository,
• added a sample for using the new image loading animation with Picasso

• added CircularProgress and a progress sample,
• tweaked light theme a bit, now it's not only gray,
• changed radial transition sample to show transition between a fragment and a view,
• updated Toolbar,
• SVGView color filter bugfixing

• added dark and light AppCompat themes,
• added a text appearance demo,
• added touch ripples to the main list of demos,
• changed the demo theme to light,
• added this readme file

• added dark and light themes,
• cleaned up a bit,
• the library is open-sourced as Carbon