onInterceptKeyBeforeSoftKeyboard

Functions summary

Modifier
Modifier.onInterceptKeyBeforeSoftKeyboard(
    onInterceptKeyBeforeSoftKeyboard: (KeyEvent) -> Boolean
)

Adding this modifier to the modifier parameter of a component will allow it to intercept hardware key events before they are sent to the software keyboard.
Cmn

Functions

Modifier.onInterceptKeyBeforeSoftKeyboard

Cmn 
fun Modifier.onInterceptKeyBeforeSoftKeyboard(
    onInterceptKeyBeforeSoftKeyboard: (KeyEvent) -> Boolean
): Modifier

Adding this modifier to the modifier parameter of a component will allow it to intercept hardware key events before they are sent to the software keyboard. This can be used to intercept key input from a DPad, or physical keyboard connected to the device and is not applicable to input that is sent to the soft keyboard via spell check or autocomplete.

import androidx.compose.foundation.focusable
import androidx.compose.foundation.layout.Box
import androidx.compose.ui.Modifier
import androidx.compose.ui.input.key.Key
import androidx.compose.ui.input.key.key
import androidx.compose.ui.input.key.onKeyEvent
import androidx.compose.ui.input.key.onPreviewKeyEvent

// When the inner Box is focused, and the user presses a key, the key goes down the hierarchy
// and then back up to the parent. At any stage you can stop the propagation by returning
// true to indicate that you consumed the event.
Box(Modifier.onPreviewKeyEvent { keyEvent1 -> false }.onKeyEvent { keyEvent4 -> false }) {
    Box(
        Modifier.onPreviewKeyEvent { keyEvent2 -> false }
            .onKeyEvent { keyEvent3 -> false }
            .focusable()
    )
}
Parameters
onInterceptKeyBeforeSoftKeyboard: (KeyEvent) -> Boolean

This callback is invoked when the user interacts with the hardware keyboard. While implementing this callback, return true to stop propagation of this event. If you return false, the key event will be sent to this SoftKeyboardInterceptionModifierNode's parent, and ultimately to the software keyboard.