I want to open my Activity A gt Activity B with `onActivityR

Question

I want to open my Activity A gt Activity B with `onActivityResult ` 1 I am reading this they are using LaunchEffect So should I use this in my composable function 2 I see ianhanniballake using DisposableEffect so what s the use of this 3 In normal xml activity we set `setResult RESULT OK intent ` on Activity B when we want to submit something So what do we use in compose function Now I am adding my code

KotlinLeaner · Answer

xml activity ```val startInputForResult = registerForActivityResult StartActivityForResult result gt if result resultCode == Activity RESULT OK val data = result data logE data $data Input setOnClickListener startInputForResult launch launchInput this item ``` LaunchInputActivity which is fully composable ```class LaunchInputActivity ComponentActivity override fun onCreate savedInstanceState Bundle super onCreate savedInstanceState setContent Theme AppBarScaffold Input Composable fun Input viewModel InputViewModel = getViewModel Column modifier = Modifier fillMaxHeight verticalScroll rememberScrollState padding 10 dp verticalArrangement = Arrangement SpaceBetween Button setResult giving error to me unknown reference ``` can someone guide me How can I use this in project Thanks ```compose version 1 1 1```

Ian Lake · Answer

You d want to follow the official docs for Activity Results in Compose <https developer android com jetpack compose libraries activity result|https developer android com jetpack compose libraries activity result>

KotlinLeaner · Answer

This example shows that calling one composable function to another compassable It nothing mention to normal Interoperability with composable activity

Ian Lake · Answer

The setResult side on the other activity hasn t changed at all ever Compose or not you still need a reference to the activity to call setResult

KotlinLeaner · Answer

Okk little bit clear

Ian Lake · Answer

Maybe it would help to focus your question on which side you actually have a question on because both of the posts you link are only on the starting side but your question seems to be about the receiving side

KotlinLeaner · Answer

My mainly question is how can we open composable activity from normal activity

KotlinLeaner · Answer

When user sumbit on composable activity How can I received back data in my normal activity

KotlinLeaner · Answer

Now Is it clear to you

KotlinLeaner · Answer

I ll explain in detail `Activity A` wants to open `Activity B` When user submit data on `Activity B` then it returns to `Activity A` `Activity A` means normal xml layout `Activity B` means fully composable activity

Ian Lake · Answer

Okay so just the normal Activity Result APIs on the starting side that part it looks like you got correct already

KotlinLeaner · Answer

If you need code my composable activity I attached the above snippet Please have a look on `LaunchInputActivity`

Ian Lake · Answer

setResult is a method on Activity so you need a reference to your Activity like I mentioned above So now you have two choices your Input composable can find the Activity itself say from LocalContext current casting it to an Activity and call setResult on the activity Your Input composable could take a lambda method as an input which your Activity then uses to call setResult on itself using whatever data Input passed to it via the lambda

KotlinLeaner · Answer

I tried this piece of code ```fun Context findActivity AppCompatActivity = when this is AppCompatActivity gt this is ContextWrapper gt baseContext findActivity else gt null ``` And set this in my composable function ```val activity = context findActivity activity let it setResult Activity RESULT OK it finish ``` is this correct

KotlinLeaner · Answer

I really appreciate your advice Thanks

Ian Lake · Answer

Yep that would do it

KotlinLeaner · Answer

+1