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#  libaddressinput
[](https://drone.io/github.com/googlei18n/libaddressinput/latest)
The _libaddressinput_ project consists of two different libraries (one
implemented in C++, one implemented in Java for Android) that use
[address metadata](https://github.com/googlei18n/libaddressinput/wiki/AddressValidationMetadata)
from
[Google](https://developers.google.com/)'s
[I18n Services](https://i18napis.appspot.com/)
[Address Data Service](https://i18napis.appspot.com/address)
to assist application developers in collecting and handling _postal addresses_
from all over the world.
These libraries can provide information about what input fields are required for
a correct address input form for any country in the world and can validate an
address to highlight input errors like missing required fields or invalid
values.
## C++
The C++ library (in very portable C++03) of _libaddressinput_ is the backend for
[requestAutocomplete()](http://www.html5rocks.com/en/tutorials/forms/requestautocomplete/)
in [Chromium](http://www.chromium.org/Home). The source code for that is a good
example of how to use this library to implement a complex feature in a real
application:
https://src.chromium.org/viewvc/chrome/trunk/src/third_party/libaddressinput/
https://chromium.googlesource.com/chromium/src/+/master/third_party/libaddressinput/
Video: [Easy International Checkout with Chrome](https://www.youtube.com/watch?v=ljYeHwGgzQk)
## Java
The Java library of _libaddressinput_ is written for use in
[Android](https://developer.android.com/) and includes an Android UI address
input widget ready for use, but only the UI parts are tied to Android (all the
non-UI unit tests can be readily run in Java SE, `ant junit`) and the rest of
the library could easily be adapted to run in any Java environment.
## Mailing List
Using and developing libaddressinput is discussed on this mailing list:
https://groups.google.com/forum/#!forum/libaddressinput-discuss
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