What is androidpicker?

AndroidPicker is a Java library for Android apps that provides a collection of scroll-wheel style selection dialogs. When a mobile app needs a user to pick a value from a list, this library supplies ready-made UI components for many common scenarios so developers do not have to build them from scratch. The library covers a wide range of picker types. There is a date and time picker suitable for things like birth dates or business hours, a single-option picker for fields like gender, occupation, education level, or zodiac sign, and a linked multi-column picker where selecting one column filters the choices in the next, useful for things like vehicle license plate prefixes or fund purchase dates. There is also an address picker that handles the three-tier Chinese administrative hierarchy of province, city, and district, a number picker for numeric values like age, height, weight, or temperature, a calendar-style date picker suited to hotel or flight booking, a color picker, and pickers for files, directories, and images. Each picker type is distributed as a separate module on JitPack, so an app can include only the components it actually needs rather than pulling in the whole library. The address data is bundled as a JSON file that can be replaced with custom data if the default China address dataset does not fit the use case. Version 3.0 was a complete rewrite of the underlying code with improved performance and better XML layout compatibility, but it broke the API from versions 1.x and 2.x, so upgrading from older versions requires care. The older 1.x and 2.x branches are archived and still accessible. The author noted in the README that they stopped doing Android development in 2022 and can no longer contribute code themselves, so the project depends on community pull requests for continued maintenance. A demo APK is available in the repository for testing the pickers before integrating them.