Jetpack Compose Show Devices - Kotlin

Introduction

Jetpack Compose is a modern toolkit for building native Android UIs with declarative Kotlin code. It enables developers to build beautiful and responsive UIs quickly and easily. One of its useful features is "Show Devices", which allows developers to render their UI designs on different devices. This feature is helpful for testing and debugging the layout across different screen sizes, orientations, and densities.

How to use Show Devices

In order to use the Show Devices feature, you first need to create a Composable function that returns your UI component. For example:

@Composable
fun MyUIComponent() {
    // your UI element(s) here
}

Then, you can use the Show Devices function to render your UI on different device configurations. The Show Devices function takes in a lambda that returns your UI component.

setContent {
    ShowDevices {
        MyUIComponent()
    }
}

The above code will render MyUIComponent() on default device configurations, such as a phone in portrait mode. However, you can customize the device configuration by passing in a DeviceConfig object. For example:

setContent {
    ShowDevices(deviceConfigs = listOf(
        DeviceConfig(phoneConfig()),
        DeviceConfig(tabletConfig()),
        DeviceConfig(wearableConfig())
    )) {
        MyUIComponent()
    }
}

In the above code snippet, we have configured the Show Devices feature to render our UI component on a phone, tablet, and wearable device. The phoneConfig(), tabletConfig(), and wearableConfig() functions return DeviceConfig objects with pre-defined device configurations.

Available device configurations

Jetpack Compose comes with pre-defined device configurations that you can use with Show Devices. Here are some of the available device configurations:

• phoneConfig(): Renders UI on a phone in portrait mode.
• phoneLandscapeConfig(): Renders UI on a phone in landscape mode.
• tabletConfig(): Renders UI on a tablet in portrait mode.
• tabletLandscapeConfig(): Renders UI on a tablet in landscape mode.
• wearableConfig(): Renders UI on a wearable device.

Conclusion

Jetpack Compose's Show Devices feature is a handy tool for testing and debugging your UI layout on different device configurations. With its easy-to-use API and pre-defined device configurations, you can quickly iterate on your design and ensure that it looks great on all devices.