I'm looking to combine 4 StateFlow values and make 1 StateFlow from these. I know already of the combine function like this:
val buttonEnabled = cameraPermission.combine(micPermission) {
//some logic
}
How could this be done with 4 flows? when I attempt the below, I get the error there is too many arguments, but the combine function docs do say you are able to add up to 5 flows?
val buttonEnabled = cameraPermission.combine(micPermission, locationPermission, contactsPermission) {
}
"but the combine function docs do say you are able to add up to 5 flows?"
Yes syntax :
combine(flow1, flow2, flow3, flow4) {t1, t2, t3, t4 -> resultMapper}.stateIn(scope)
If you require more than 5 combined, then it is very simple to create your own functions example for 6 :
fun <T1, T2, T3, T4, T5, T6, R> combine(
flow: Flow<T1>,
flow2: Flow<T2>,
flow3: Flow<T3>,
flow4: Flow<T4>,
flow5: Flow<T5>,
flow6: Flow<T6>,
transform: suspend (T1, T2, T3, T4, T5, T6) -> R
): Flow<R> = combine(
combine(flow, flow2, flow3, ::Triple),
combine(flow4, flow5, flow6, ::Triple)
) { t1, t2 ->
transform(
t1.first,
t1.second,
t1.third,
t2.first,
t2.second,
t2.third
)
}