tree 948aa776267ffe551765359c91aaa4d2c1adc90c
parent f1422b62eae19bdd2f1ec7564862c83b31b38c00
author Ian Lake <ilake@google.com> 1621465543 -0700
committer Ian Lake <ilake@google.com> 1623258791 -0700

Provide a ViewModelStoreOwner parameter for viewModel()

The current viewModel() always uses the
LocalViewModelStoreOwner.current value as the
ViewModelStoreOwner. This means when using
an alternate ViewModelStoreOwner (such as one
from a parent navigation graph, previousBackStackEntry,
or from the containing activity), developers have
needed to use ViewModelProvider directly.

By providing a parameter of viewModel() that takes
an explicit ViewModelStoreOwner, developers can
use the same syntax.

In cases where the Factory depends on the owner,
developers would get the owner first, build the
factory, then pass both to viewModel:

val owner = OwnerProvider.get()
val factory = Factory(owner)
val viewModel: MyViewModel = viewModel(owner, factory)

Relnote: "Added a new `viewModel()` overload that takes an
explicit `ViewModelStoreOwner`, making it easier to work
with owners other than the `LocalViewModelStoreOwner`."
Test: updated ViewModelTest tests pass
BUG: 188693123

Change-Id: I2628d27791bfeb8a0d2f45b0fa8e9e72cb00c34b