hellocharts-android is a charting library for Android compatible with API 8+(Android 2.2). Works best when hardware acceleration is available, so API 14+ (Android 4.0) is recommended.

Features:

• Line chart (cubic lines, filled lines, scattered points)
• Column chart (grouped, stacked, negative values)
• Pie chart
• Bubble chart
• Combo chart(columns/lines)
• Preview charts (for column chart and line chart)
• Zoom (pinch to zoom, double tap zoom), scroll and fling
• Custom and auto-generated axes(top, bottom, left, right, inside)
• Animations

EfficientAdapter is an efficient adapter to make the use of RecyclerView much easier.

android-GridViewWithHeaderAndFooter is a GridView with Header and Footer.

It's very simple to use it:

gridView.addHeaderView(header); gridView.addFooterView(footer);

CircularProgressDrawable is a drawable with capabilities to indicate progress.

Circular Progress Drawable can be defined programatically and the only parameters it will require will be the different colors and the size of the outer ring.

Scale Property for the inner ring can be used to achieve a variety of effects, as pulsating effects, overshoot or to make it disappear completely.

The drawable allows both for a progress and an indetermination mode. In the indetermination mode instead of filling the outer ring, a 90º arc will be shown that can be animated to spin around the inner circle.

Automatically generate a ContentProvider backed by an SQLite database.

If you have a need to implement a UI component which will act similar to toggle button or be like a view group with state checked/unchecked this is a right choice for you.