Navigate up to the parent activity if it's declared in the manifest and start the new task if needed.

NavigateUp.kt

import android.app.Activity
import androidx.core.app.NavUtils
import androidx.core.app.TaskStackBuilder

/**
 * Navigate up to the parent activity if it's declared in the manifest and start the new task if
 * needed.
 *
 * @see [NavUtils.shouldUpRecreateTask]
 * @receiver Activity
 */
fun Activity.navigateUpToParent() {
    // Obtain parent activity's intent
    NavUtils.getParentActivityIntent(this)
        ?.let {
            // Only attempt to go ahead if `NavUtils` tells us or this is the root of task
            if (NavUtils.shouldUpRecreateTask(this, it) || isTaskRoot)
            // Build stack that launches parent activity.
                TaskStackBuilder
                    .create(this)
                    .addNextIntentWithParentStack(it)
                    .startActivities()
            else // No need to recreate the task.
                NavUtils.navigateUpTo(this, it)
        }
        ?: finish() // Fallback: Parent activity not defined.
}