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import androidx.compose.runtime.Composable | |
import androidx.compose.runtime.collectAsState | |
import androidx.compose.runtime.getValue | |
import androidx.compose.runtime.remember | |
import androidx.compose.ui.platform.AmbientContext | |
import androidx.compose.ui.platform.AmbientLifecycleOwner | |
import androidx.fragment.app.Fragment | |
import androidx.fragment.app.FragmentActivity | |
import com.airbnb.mvrx.* | |
@Composable | |
fun <VM : MavericksViewModel<S>, S : MavericksState> VM.collectState(): S { | |
val state by stateFlow.collectAsState(initial = withState(this) { it }) | |
return state | |
} | |
@Composable | |
inline fun <reified VM : MavericksViewModel<S>, reified S : MavericksState> mavericksViewModel(): VM { | |
val viewModelClass = VM::class | |
val viewModelContext = when (val lifecycleOwner = LocalLifecycleOwner.current) { | |
is Fragment -> { | |
val activity = lifecycleOwner.requireActivity() | |
val args = lifecycleOwner.arguments?.get(Mavericks.KEY_ARG) | |
FragmentViewModelContext(activity, args, lifecycleOwner) | |
} | |
is FragmentActivity -> { | |
val args = lifecycleOwner.intent.extras?.get(Mavericks.KEY_ARG) | |
ActivityViewModelContext(lifecycleOwner, args) | |
} | |
else -> error("Unknown LifecycleOwner ${lifecycleOwner::class.simpleName}. Must be Fragment or Activity for now.") | |
} | |
val activity = LocalContext.current as? FragmentActivity ?: error("Composable is not hosted in a FragmentActivity") | |
return remember(viewModelClass, activity) { | |
val keyFactory = { viewModelClass.java.name } | |
MavericksViewModelProvider.get( | |
viewModelClass = viewModelClass.java, | |
stateClass = S::class.java, | |
viewModelContext = viewModelContext, | |
key = keyFactory() | |
) | |
} | |
} |
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@Composable | |
fun MyComposable() { | |
val viewModel: MyViewModel = mavericksViewModel() | |
val state = viewModel.collectAsState() | |
AnotherComposable( | |
state.value, | |
onClick = viewModel.onClick() | |
) | |
} |
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@tinder-christopherperry
mavericks-compose
is officially outhttps://airbnb.io/mavericks/#/jetpack-compose