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The CallContent is the highest-level UI component that allows you to build your own call screen with full UI elements. So you don't need to take care much about each feature that you need to build a video call screen with this component.

Basically what you can do with the CallContent is:

  • A full call screen with multiple UI elements, such as the app bar, participants grid, and control action buttons.
  • Supports orientation changes for landscape mode.
  • Handles the state and actions of enabling and disabling camera, microphone, and speakerphone.
  • Renders Screensharing.
  • Handles Android permission requests related to the camera and microphone.
  • Manages media lifecycles (pause/resume the camera and microphone).
  • Supports picture-in-picture easily.
  • Display participant information, such as audio levels, name, microphone states, and reactions.
  • Styles video renderer.

Based on the call state, the CallContent provides a list or grid of participants, with their avatars and names, or a video if they're publishing, with more information for each participant, like their connection quality and audio levels.

Let's see how to show the CallContent UI.

Note: If you want to learn more about our component types, make sure to read through our Compose Components Overview.

Build a Call Screen With CallContent

To use the bound CallContent, add it to your UI within VideoTheme:

override fun onCreate(savedInstanceState: Bundle?) {
setContent {
VideoTheme {
CallContent(call = call) // here

This is a very basic example, which will show the default call UI which transforms its layout based on the number of participants and their published or unpublished tracks.

Both of the components will handle showing a complex and rich UI with many features, right out of the box. Aside from the standard participant video stream we support screensharing and have components that display the content focusing on it.

Aside from the standard participant video stream we support screensharing and have components that display the content focusing on it.

RegularScreen Sharing
RegularScreen Sharing

The CallContent UI also handles orientation changes internally, so both of these features are supported in landscape orientation.

Landscape - Regular and Screen Sharing
Landscape Screen Sharing

This component is very rich, so you might want to customize how the actions are handled. Let's do that next.

Handling Actions

CallContent supports these main action handlers:

public fun CallContent(
..., // other params
onBackPressed: () -> Unit = { .. },
onCallAction: (CallAction) -> Unit = { .. },
  • onBackPressed: Handler when the user taps on the back button. Used by default to handle picture in picture mode and different menus that can be shown based on other user actions.
  • onCallAction: Handler when the user triggers any of the available actions around audio, video, speakerphone, participants and more. The events come from the Control Actions by default.

These can be easily customized when calling the UI component in your code:

VideoTheme {
call = call,
onBackPressed = { .. },
onCallAction = { .. }

Using these handlers you can override some of the default behavior like what happens when the user taps on the Leave Call button, if any dialogs are shown and so on.

Next, once you have the behavior down, you can explore customizing the UI of the component.


The following parameters are available on the CallContent:

callThe call includes states and will be rendered with participants.
modifierThe standard Jetpack Compose modifier used to style things like the component size, background, shape and similar.
onBackPressedHandler when the user taps on the back button.
permissionsAndroid permissions that should be required to render a video call properly.
onCallActionHandler when the user triggers a Call Control Action.
appBarContentContent is shown that calls information or additional actions.
styleDefined properties for styling a single video call track.
videoRendererA single video renderer renders each individual participant.
videoContentContent is shown that renders all participants' videos.
controlsContentContent is shown that allows users to trigger different actions to control a joined call.
enableInPictureInPictureIf the user has engaged in Picture-In-Picture mode.
pictureInPictureContentContent shown when the user enters Picture in Picture mode, if it's been enabled in the app.

You can find out the parameters details in the CallContent docs.

If you're looking for guides on how to override and customize this UI, we have various UI Cookbook recipes for you and we cover a portion of customization within the Video Android SDK Tutorial.

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