androidx.core.widget | Android Developers

Kotlin |Java

Classes

AutoScrollHelper	AutoScrollHelper is a utility class for adding automatic edge-triggered scrolling to Views.
CompoundButtonCompat	Helper for accessing `android.widget.CompoundButton`.
ContentLoadingProgressBar	ContentLoadingProgressBar implements a ProgressBar that waits a minimum time to be dismissed before showing.
EdgeEffectCompat	Helper for accessing `android.widget.EdgeEffect`.
ImageViewCompat	Helper for accessing features in `ImageView`.
ListPopupWindowCompat	Helper for accessing features in `ListPopupWindow`.
ListViewAutoScrollHelper	An implementation of `AutoScrollHelper` that knows how to scroll through a `ListView`.
ListViewCompat	Helper for accessing features in `ListView`
NestedScrollView	NestedScrollView is just like `android.widget.ScrollView`, but it supports acting as both a nested scrolling parent and child on both new and old versions of Android.
PopupMenuCompat	Helper for accessing features in `PopupMenu`.
PopupWindowCompat	Helper for accessing features in `PopupWindow`.
RichContentReceiverCompat	Callback for apps to implement handling for insertion of rich content.
ScrollerCompat	Provides access to new `Scroller` APIs when available.
TextViewCompat	Helper for accessing features in `TextView`.
TextViewRichContentReceiverCompat	Base implementation of `RichContentReceiverCompat` for editable `TextView` components.

Extension functions summary

For android.widget.TextView
TextWatcher	`TextView.addTextChangedListener(crossinline beforeTextChanged: (text: CharSequence?, start: Int, count: Int, after: Int) -> Unit = { _, _, _, _ -> }, crossinline onTextChanged: (text: CharSequence?, start: Int, before: Int, count: Int) -> Unit = { _, _, _, _ -> }, crossinline afterTextChanged: (text: Editable?) -> Unit = {})` Add a text changed listener to this TextView using the provided actions
TextWatcher	`TextView.doAfterTextChanged(crossinline action: (text: Editable?) -> Unit)` Add an action which will be invoked after the text changed.
TextWatcher	`TextView.doBeforeTextChanged(crossinline action: (text: CharSequence?, start: Int, count: Int, after: Int) -> Unit)` Add an action which will be invoked before the text changed.
TextWatcher	`TextView.doOnTextChanged(crossinline action: (text: CharSequence?, start: Int, before: Int, count: Int) -> Unit)` Add an action which will be invoked when the text is changing.

Extension functions

addTextChangedListener

inline fun TextView.addTextChangedListener(
    crossinline beforeTextChanged: (text: CharSequence?, start: Int, count: Int, after: Int) -> Unit = { _, _, _, _ -> }, 
    crossinline onTextChanged: (text: CharSequence?, start: Int, before: Int, count: Int) -> Unit = { _, _, _, _ -> }, 
    crossinline afterTextChanged: (text: Editable?) -> Unit = {}
): TextWatcher

Add a text changed listener to this TextView using the provided actions

Return
the	TextWatcher added to the TextView

doAfterTextChanged

inline fun TextView.doAfterTextChanged(crossinline action: (text: Editable?) -> Unit): TextWatcher

Add an action which will be invoked after the text changed.

Return
the	TextWatcher added to the TextView

doBeforeTextChanged

inline fun TextView.doBeforeTextChanged(crossinline action: (text: CharSequence?, start: Int, count: Int, after: Int) -> Unit): TextWatcher

Add an action which will be invoked before the text changed.

Return
the	TextWatcher added to the TextView

doOnTextChanged

inline fun TextView.doOnTextChanged(crossinline action: (text: CharSequence?, start: Int, before: Int, count: Int) -> Unit): TextWatcher

Add an action which will be invoked when the text is changing.

Return
the	TextWatcher added to the TextView