Focus on Tap

Introduction

Focus on Tap is enabled by default in Camposer on supported devices. Users can tap the camera preview to focus at a specific point.

Check Focus-on-Tap Support

To determine whether the device supports focus on tap functionality, use the isFocusSupported property from cameraSession:

import com.ujizin.camposer.lifecycle.compose.collectStateWithLifecycle

val cameraInfoState by cameraSession.info.collectStateWithLifecycle()
val isFocusSupported = cameraInfoState.isFocusSupported

Disable Focus on Tap

val isFocusOnTapEnabled by remember { mutableStateOf(false) }

CameraPreview(
    // ...
    isFocusOnTapEnabled = isFocusOnTapEnabled
)

Custom Focus Content

You can provide a custom composable for the focus indicator using focusTapContent:

CameraPreview(
    // ...
    focusTapContent = { 
        AwesomeFocusTapContent() 
    }
)

Custom Focus UI Duration

The CameraPreview.onFocus parameter provides complete control over the focus indicator behavior. It is a suspendable callback that receives an onComplete function, which should be called when the focus layout should be removed.

Default Behavior: the focus layout disappears after 1 second.

CameraPreview(
    // ...
    onFocus = { onComplete ->
        delay(10_000L) // Keep focus UI visible for 10 seconds
        onComplete()
    }
)