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At Google Developer Days in China, Google launched the final developer preview of Flutter, the company's open source mobile user interface that helps developers create native interfaces for Android and iOS. Flutter Release Preview 2 is the last major step before the stable release of Flutter 1.0, due to arrive later this year.
If you have already installed Flutter, simply type the command flutter upgrade to get the latest version. If you do not, follow the Getting Started Guide for Windows, MacOS, or Linux.
This is the sixth preview. Flutter was first announced in May 2017 at the Google I / O Developer Conference. The first beta came in February, followed by two others, followed by two previews. Designed to compete with frameworks such as Facebook's React Native, the library is designed to combine native mobile performance and platform integrations with the rapid development and cross-platform reach of portable UI toolkits. . Flutter applications are created using the Google Dart programming language.
Flutter Release Preview 2
Flutter Release Preview 2 includes support for running Dart code in the background even when the application is paused. Plug-in authors can use it to create new plug-ins that execute code when triggering an event, such as triggering a timer or receiving a timer. updating the location.
This version also reduces up to 30% the size of the application package on Android and iOS. The minimal application Flutter on Android now weighs 4.7 MB, an economy of 2 MB since the beginning of the Flutter project (other optimizations are in progress). On iOS, your mileage may vary depending on how iOS packages are built.
On the other hand, Preview 2 promises "perfect iOS applications in pixels". Although Flutter is supposed to be independent of any UI theme, this release extends support for teams that want to create applications that comply with Apple's interface guidelines. Thematic controls "Cupertino" in Flutter with widgets and classes specific to iOS.
Floating adoption
Google says it continues to see new developers adopt Flutter. The company notes that thousands of Flutter-based apps have already reached the Apple App Store and Google Play, even before version 1.0, including some of the most popular in the world: Alibaba (Android, iOS), Tencent Now (Android, iOS) and Google Ads (Android, iOS).
Flutter also made its debut in the first 50 active software repositories on GitHub:
On StackOverflow, the Flutter activity (new questions posted, answered and viewed) is also up:
For more information, Google offers many resources, including examples, practice videos, newsletters, community articles, development fairs, newsgroups, discussion forums, newsletters and more. community support and a weekly information bubble.
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