Created
November 22, 2020 14:44
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[BLOG] Example of Fragment handling ViewModel's ViewState and Interactions
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| class SettingsFragment : Fragment() { | |
| private val viewModel: SettingsViewModel2 by viewModels() | |
| override fun onViewCreated(view: View, savedInstanceState: Bundle?) { | |
| super.onViewCreated(view, savedInstanceState) | |
| setInteractions() | |
| observeViewState() | |
| } | |
| private fun setInteractions() { | |
| notificationsSwitch.setOnCheckedChangeListener { checked -> | |
| viewModel.onInteraction(NotificationSwitchChanged(checked)) | |
| } | |
| notificationsButton.setOnClickListener { | |
| viewModel.onInteraction(NotificationSettingButtonClick) | |
| } | |
| /* other interactions */ | |
| } | |
| private fun observeViewState() { | |
| viewModel.viewState.observe(viewLifecycleOwner, Observer { viewState -> | |
| render(viewState ?: return@Observer) | |
| }) | |
| } | |
| private fun render(viewState: ViewState) { | |
| renderName(viewState) | |
| renderNotifications(viewState) | |
| } | |
| private fun renderName(viewState: ViewState) { | |
| firstNameText.text = viewState.firstName | |
| lastNameText.text = viewState.lastName | |
| } | |
| private fun renderNotifications(viewState: ViewState) { | |
| notificationzSwitch.isChecked = viewState.notificationsChecked | |
| notificationsButton.isEnabled = viewState.notificationsEnabled | |
| } | |
| } |
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