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May 10, 2019 04:36
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Correct implementation of Swipe-to-Refresh with LiveData.
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class UserListActivity : AppCompatActivity() { | |
@Inject internal lateinit var viewModelFactory: ViewModelProvider.Factory | |
private lateinit var userListViewModel: UserListViewModel | |
private lateinit var swipeRefreshLayout: SwipeRefreshLayout | |
override fun onCreate(savedInstanceState: Bundle?) { | |
super.onCreate(savedInstanceState) | |
setContentView(R.layout.activity_main) | |
userListViewModel = ViewModelProviders.of(this, viewModelFactory).get(UserListViewModel::class.java) | |
setUpUi() | |
fetchUsers() | |
} | |
private fun setUpUi() { | |
swipeRefreshLayout = findViewById(R.id.user_list_swipe_refresh_layout) | |
swipeRefreshLayout.setOnRefreshListener { | |
userListViewModel.refreshUsers() | |
} | |
} | |
private fun fetchUsers() { | |
swipeRefreshLayout.isRefreshing = true | |
userListViewModel.getUsers().observe(this, Observer { users -> users?.let { displayUsers(it) } }) | |
} | |
private fun displayUsers(users: List<UserModel>) { | |
swipeRefreshLayout.isRefreshing = false | |
// Display users... | |
} | |
} |
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