![]() ![]() ![]() In the above row, the first child composable has ¼ of the row's width, the second also has ¼ of the row's width, and the third has ½ of the row's width. The child elements will distribute the weight as shown below: The available space for the row is divided proportionally to the specified weight value, with more available space going to children with higher weight values. All child elements have assigned weights in this case. Note: Modifier.weight() sets the UI element's width/height proportionally to the element's weight, relative to its weighted siblings (other child elements in the row or column).Įxample: Consider three child elements in a row with weights 1f, 1f, and 2f. To align the expand more button to the end of the list item, you need to add a spacer in the layout with the Modifier.weight() attribute. Notice the expand more button is not aligned to the end of the list item. Check out WoofPreview() in the Design pane.padding(dimensionResource(R.dimen.padding_small)) You will define the onClick action in a later step. Pass in the expanded state and an empty lambda for the callback. In the DogItem() composable, at the end of the Row block, after the call to DogInformation(), add DogItemButton(). Display the icon button within the list item.Wrap the mutableStateOf() function call with the remember() function to store the value in the Composition during initial composition, and the stored value is returned during recomposition. Use the mutableStateOf() function so Compose observes any changes to the state value, and triggers a recomposition to update the UI. Refresher on remember() and mutableStateOf(): Scroll to the end of the (Module :app) file.In the Project pane, open Gradle Scripts > (Module :app).You will learn more about adding libraries to your app in later units. When you build your app, the build system compiles the library module and packages the resulting compiled contents in the app. Note on Gradle dependency: To add a dependency to your project, specify a dependency configuration such as implementation in the dependencies block of your module's file. ![]() You will use the and icons from this library. Material Design provides a number of icons, arranged in common categories, for most of your needs.Īdd the material-icons-extended library dependency to your project. For example, a pencil in the physical world is used for writing, so its icon counterpart usually indicates create or edit. Icon design often reduces the level of detail to the minimum required to be familiar to a user. They often take inspiration from objects in the physical world that a user is expected to have experienced. Icons are symbols that can help users understand a user interface by visually communicating the intended function. In this section you will add the Expand More and Expand Less icons to your app. You can browse the code in the Woof app GitHub repository. Note: The starter code is in the material branch of the downloaded repository. $ cd basic-android-kotlin-compose-training-woof To get started, download the starter code:Īlternatively, you can clone the GitHub repository for the code: $ git clone You'll also add a spring animation to animate the list item being expanded. You'll add hobby information which will display when you expand the list item. In this codelab, you will add animation to the Woof app. In the Material Theming with Jetpack Compose codelab, you created the Woof app using Material Design which displays a list of dogs and their information. Internet connection to download starter code.The latest stable version of Android Studio.You will build on the Woof app from the Material Theming with Jetpack Compose codelab, and add a simple animation to acknowledge the user's action.How to build a simple spring animation with Jetpack Compose.Basic knowledge of how to create lists in Jetpack Compose.Basic knowledge of how to build layouts in Jetpack Compose.Knowledge of Kotlin, including functions, lambdas, and stateless composables.This helps make the app's UI expressive and easy to use.Īnimations can also add a polished look to your app, which gives it an elegant look and feel, and also helps the user at the same time. Items can fade in as they appear and fade out as they disappear, they can move on or off of the screen, or they can transform in interesting ways. There are many types of animations that can be used in an app's user interface. Animating individual updates on a screen full of information can help the user see what changed. Animations can make your app more interactive, interesting, and easier for users to interpret. In this codelab, you learn how to add a simple animation to your Android app. ![]()
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