There are also events that can be useful to understand the status of playing, such as: Methods that you can use to manage the animations are PlayAnimation, PauseAnimation, and StopAnimation, which are self-explanatory. The Lottie library provides methods and properties that allow developers to control the flow of the animations. The Lottie library allows you to control with more granularity the way the animation is played, and this is discussed in the next section. The following figure shows a static frame of the animation, but it will be animating on a physical device and/or simulator. RepeatMode can also be set with Reverse and Infinite, and the latter helps you avoid the need of setting the RepeatCount property. If you run the sample app, you will see the Lottie animation being played on your device. In the example, AutoPlay is set as True, and the animation will restart ( RepeatMode) three times ( RepeatCount). With AssetOrBundle, Url, and Stream, you use the Animation property to specify the animation file name with Json, you need to assign a property called AnimationJson. The first two are self-explanatory the latter allows you to bind a string object containing the JSON. Other options can be Url, Stream, and Json. In this case, AssetOrBundle means the animation is a local file. The AnimationSource property specifies where the JSON animation comes from. In its simplest form, the AnimationView can be declared as follows: Before you can use it in your XAML, you need to add the following XML namespace declaration at the ContentPage level: xmlns:lottie="clr-namespace:Lottie.Forms assembly=Lottie.Forms" The Lottie library provides a new view called AnimationView. For the current example, I will use the JSON animation included in the Lottie library repository, which is already included inside the companion code for your convenience, but you are free to use whatever animation you want. On this site, you can find both free and paid animations, illustrations, icons, and much more. A very nice and popular source for Lottie animations is the website. If Lottie animations are instead hosted on a web server, either public or private, the animation can be simply consumed by passing its URI to the Lottie view. For iOS, your JSON files must be added into the Resources folder, and the Build Action must be set as BundleResource.For Android, your JSON files must be added into the Assets folder, and the Build Action must be set as AndroidResource.If your team has designers that produce Lottie JSON files, you will add such files into the solution as follows: The way your app consumes Lottie animations depends on the source of the animations themselves. The NuGet package you need to install is called .Lottie as shown in this figure: Lottie for Xamarin.FormsĪ Lottie open-source implementation also exists for Xamarin.Forms, and it is very easy to use. For the next example, create a new, blank Xamarin.Forms project and open the NuGet Package Manager user interface. gif file.įor Xamarin.Forms, a Lottie implementation also exists and allows you to play beautiful animated JSON illustrations in your mobile apps. One of its major advantages is that Lottie files are generally much smaller than an equivalent animated. In order to render these JSON animations, several libraries exist, but the most important is called Lottie, which is offered by Airbnb. This format is not actually a proprietary one, rather it is JSON.Īdobe After Effects can produce files in a specialized JSON format containing the design for animated illustrations. In the last few years, an interesting animation format has become extremely popular among designers and developers, and it is a format produced by the famous Adobe After Effects design suite.
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