Corbind

To add platform bindings, import corbind module:

dependencies {
    implementation("ru.ldralighieri.corbind:corbind:1.10.0")
}

List of extensions

app

content

view

Component	Extension	Description
View	`attachEvents`	Called when the view is attached to a window.
	`attaches`	Called when the view is attached to a window.
	`detaches`	Called when the view is detached from a window.
	`clicks`	Called when a view has been clicked.
	`drags`	Called when a drag event is dispatched to a view.
	`focusChanges`	Called when the focus state of a view has changed.
	`hovers`	Called when a hover event is dispatched to a view.
	`keys`	Called when a hardware key is dispatched to a view.
	`layoutChanges`	Called when the layout bounds of a view changes due to layout processing.
	`layoutChangeEvents`	A more advanced version of the `layoutChanges`.
	`longClicks`	Called when a view has been clicked and held.
	`scrollChangeEvents`	Called when the scroll position of a view changes.
	`systemUiVisibilityChanges`	Called when the status bar changes visibility because of a call to View#setSystemUiVisibility(int). `Deprecated, use windowInsetsApplyEvents`.
	`touches`	Called when a touch event is dispatched to a view.
	`draws`	Called when the view tree is about to be drawn.
	`globalLayouts`	Called when the global layout state or the visibility of views within the view tree changes.
	`preDraws`	Callback method to be invoked when the view tree is about to be drawn.
	`windowInsetsApplyEvents`	Called when window insets applying on a view in a custom way.
ViewGroup	`changeEvents`	Called when the hierarchy within this view changed. The hierarchy changes whenever a child is added to or removed from this view.
MenuItem	`actionViewEvents`	Called when a menu item is collapsed or collapsed.
	`clicks`	Called when a menu item has been invoked.

Component	Extension	Description
AbsListView	`scrollEvents`	Called when the list or grid has been scrolled.
Adapter	`dataChanges`	Called when a data set has been changed
AdapterView	`itemClicks`	Called when an item in this AdapterView has been clicked.
	`itemClickEvents`	A more advanced version of the `itemClicks`.
	`itemLongClicks`	Called when an item in this view has been clicked and held.
	`itemLongClickEvents`	A more advanced version of the `itemLongClicks`.
	`itemSelections`	Called when an item in this view has been selected.
	`selectionEvents`	A more advanced version of the `itemSelections`.
AutoCompleteTextView	`dismisses`	Called whenever the AutoCompleteTextView’s list of completion options has been dismissed.
	`itemClickEvents`	Called when an item in AdapterView has been clicked.
CalendarView	`dateChangeEvents`	Called upon change of the selected day.
CompoundButton	`checkedChanges`	Called when the checked state of a compound button has changed.
DatePicker	`dateChangeEvents`	Called upon a date change.
NumberPicker	`scrollStateChanges`	Called when number picker scroll state has changed.
	`valueChangeEvents`	Called upon a change of the current value.
PopupMenu	`dismisses`	Called when the associated menu has been dismissed.
	`itemClicks`	Called when a menu item is clicked if the item itself did not already handle the event.
RadioGroup	`checkedChanges`	Called when the checked radio button has changed.
RatingBar	`ratingChanges`	Called when the rating has changed.
	`ratingChangeEvents`	A more advanced version of the `ratingChanges`.
SearchView	`queryTextChanges`	Called when the query text is changed.
	`queryTextChangeEvents`	A more advanced version of the `queryTextChanges`.
SeekBar	`changes`	Called when the progress level has changed.
	`userChanges`	Called when the progress level has changed by user.
	`systemChanges`	Called when the progress level has changed by system.
	`changeEvents`	A more advanced version of previous events.
TextView	`textChanges`	Called when the text has changed.
	`textChangeEvents`	A more advanced version of the `textChanges`.
	`afterTextChangeEvents`	Called after text has been changed.
	`beforeTextChangeEvents`	Called before text has been changed.
	`editorActions`	Called when an action is performed on the editor.
	`editorActionEvents`	A more advanced version of the `editorActions`.
TimePicker	`timeChangeEvents`	Called when time has been adjusted.
Toolbar	`itemClicks`	Called when a menu item is clicked if the item itself did not already handle the event.
	`navigationClicks`	Called whenever the user clicks the navigation button at the start of the toolbar.

Examples

Traditional example of login button enabling/disabling by email and password field validation:

combine(
    etEmail.textChanges() // Flow<CharSequence>
        .map { Patterns.EMAIL_ADDRESS.matcher(it).matches() },

    etPassword.textChanges() // Flow<CharSequence>
        .map { it.length > 7 },

    transform = { email, password -> email && password }
)
    .onEach { btLogin.isEnabled = it }
    .flowWithLifecycle(lifecycle)
    .launchIn(lifecycleScope) // lifecycle-runtime-ktx

Handle an authorization event, which can be started by pressing a button bt_login or by pressing an action EditorInfo.IME_ACTION_DONE on the keyboard:

merge(
    btLogin.clicks(), // Flow<Unit>

    etPassword.editorActionEvents() // Flow<TextViewEditorActionEvent>
        .filter { it.actionId == EditorInfo.IME_ACTION_DONE }
        .filter { btLogin.isEnabled }
)
    .onEach { /* handle an authorization event */}
    .flowWithLifecycle(lifecycle)
    .launchIn(lifecycleScope) // lifecycle-runtime-ktx

Handle nfc adapter state changed

context
    .receivesBroadcast(
        IntentFilter(NfcAdapter.ACTION_ADAPTER_STATE_CHANGED)
    ) // Flow<Intent>
    .onEach { /* handle nfc adapter state changed */ }
    .flowWithLifecycle(lifecycle)
    .launchIn(lifecycleScope) // lifecycle-runtime-ktx

Handle status bars or navigation bars visibility

window.decorView.windowInsetsApplyEvents() // Flow<WindowInsetsEvent>
    .map { event ->
        with(event) {
            view.onApplyWindowInsets(insets)
        }
    }
    .map { insets ->
        insets.isVisible(WindowInsets.Type.statusBars() or WindowInsets.Type.navigationBars())
    }
    .onEach { /* handle status bars or navigation bars visibility */ }
    .flowWithLifecycle(lifecycle)
    .launchIn(lifecycleScope) // lifecycle-runtime-ktx

More examples in source code

List of extensions

app

content

view

widget

Examples