SuspendViews.kt

import android.view.View
import kotlinx.coroutines.experimental.channels.Channel
import kotlinx.coroutines.experimental.channels.ReceiveChannel
import kotlinx.coroutines.experimental.suspendCancellableCoroutine

suspend fun View.awaitOneClick() = suspendCancellableCoroutine<Unit> { continuation ->
    continuation.invokeOnCancellation {
        setOnClickListener(null)
    }
    setOnClickListener {
        setOnClickListener(null)
        continuation.resume(Unit)
    }
}

suspend fun View.clicks(
        capacity: Int = Channel.UNLIMITED
): ReceiveChannel<Unit> = Channel<Unit>(capacity).apply { setOnClickListener { offer(Unit) } }