Picker

public class Picker extends FrameLayout

Known direct subclasses
DatePicker

DatePicker is a directly subclass of Picker.

PinPicker

Picker subclass for allowing the user to enter a numerical PIN.

TimePicker

TimePicker is a direct subclass of Picker.


Picker is a widget showing multiple customized PickerColumns. The PickerColumns are initialized in setColumns. Call setColumnAt if the column value range or labels change. Call setColumnValue to update the current value of PickerColumn.

Picker has two states and will change height:

  • isActivated is true: Picker shows typically three items vertically (see getActivatedVisibleItemCount}. Columns other than getSelectedColumn still shows one item if the Picker is focused. On a touch screen device, the Picker will not get focus so it always show three items on all columns. On a non-touch device (a TV), the Picker will show three items only on currently activated column. If the Picker has focus, it will intercept DPAD directions and select activated column.
  • isActivated is false: Picker shows one item vertically (see getVisibleItemCount) on all columns. The size of Picker shrinks.

Summary

Nested types

Listener for Picker value changes.

Public constructors

Picker(@NonNull Context context, @Nullable AttributeSet attributeSet)

Creates a Picker widget.

Picker(
    @NonNull Context context,
    @Nullable AttributeSet attrs,
    int defStyleAttr
)

Creates a Picker widget.

Public methods

void

Register a callback to be invoked when the picker's value has changed.

boolean
float

Returns number of visible items showing in a column when it's activated.

@Nullable PickerColumn
getColumnAt(int colIndex)

Get nth PickerColumn.

int

Get number of PickerColumns.

final @LayoutRes int

Classes extending Picker can call setPickerItemLayoutId to supply the Picker's item's layout id

final @IdRes int

Returns the Picker's item's TextView's id from within the layout provided by getPickerItemLayoutId or 0 if the layout provided by getPickerItemLayoutId is a {link TextView}.

int

Get current activated column index.

final CharSequence

This method is deprecated.

Use getSeparators

final @NonNull List<CharSequence>

Returns the list of separators that will be populated between the picker column fields.

float

Returns number of visible items showing in a column when it's not activated.

void
onColumnValueChanged(int columnIndex, int newValue)

Classes extending Picker can override this function to supply the behavior when a list has been scrolled.

void

Remove a previously installed value changed callback

void
requestChildFocus(View child, View focused)
void
setActivated(boolean activated)
void
setActivatedVisibleItemCount(float visiblePickerItems)

Changes number of visible items showing in a column when it's activated.

void
setColumnAt(int columnIndex, @NonNull PickerColumn column)

When column labels change or column range changes, call this function to re-populate the selection list.

void
setColumnValue(int columnIndex, int value, boolean runAnimation)

Manually set current value of a column.

void

Set columns and create Views.

final void
setPickerItemLayoutId(@LayoutRes int pickerItemLayoutId)

Sets the layout to use for picker items.

final void
setPickerItemTextViewId(@IdRes int textViewId)

Sets the Picker's item's TextView's id from within the layout provided by getPickerItemLayoutId or 0 if the layout provided by getPickerItemLayoutId is a {link TextView}.

void
setSelectedColumn(int columnIndex)

Change current selected column.

final void

Sets separator String between Picker columns.

final void

Sets the list of separators that will be populated between the Picker columns.

void
setVisibleItemCount(float pickerItems)

Changes number of visible items showing in a column when it's not activated.

Protected methods

int

Classes extending Picker can choose to override this method to supply the Picker's column's single item height in pixels.

boolean
onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect)

Inherited Constants

From android.view.View
static final int
static final int
static final int
static final int
static final int
static final int
static final Property<ViewFloat>
static final int
static final String
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE = "creditCardExpirationDate"
static final String
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY = "creditCardExpirationDay"
static final String
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH = "creditCardExpirationMonth"
static final String
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR = "creditCardExpirationYear"
static final String
static final String
AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE = "creditCardSecurityCode"
static final String
static final String
static final String
static final String
static final String
static final String
static final String
static final int
static final int
static final int
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This field is deprecated.

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static final int[]
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static final int
GONE = 8
static final int
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static final int
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static final int
static final int
KEEP_SCREEN_ON = 67108864
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
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static final int
NO_ID = -1
static final int
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static final int[]
static final int[]
static final Property<ViewFloat>
static final Property<ViewFloat>
static final Property<ViewFloat>
static final Property<ViewFloat>
static final Property<ViewFloat>
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
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static final int
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static final int
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static final int[]
static final int[]
static final int
static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int
static final int
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static final int
static final int
static final int
static final int
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static final int
static final int
static final int
static final int
static final Property<ViewFloat>
static final Property<ViewFloat>
static final Property<ViewFloat>
static final String
VIEW_LOG_TAG = "View"
static final int
static final int[]
static final Property<ViewFloat>
static final Property<ViewFloat>
static final Property<ViewFloat>
From android.view.ViewGroup
static final int
static final int
static final int
static final int
static final int
static final int
static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

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This field is deprecated.

Inherited methods

From android.widget.FrameLayout
boolean
FrameLayout.LayoutParams
FrameLayout.LayoutParams
CharSequence
boolean

This method is deprecated.

boolean
void
onLayout(boolean changed, int left, int top, int right, int bottom)
void
onMeasure(int widthMeasureSpec, int heightMeasureSpec)
void
setForegroundGravity(int foregroundGravity)
void
setMeasureAllChildren(boolean measureAll)
boolean
From android.view.View
void
void
void
ViewPropertyAnimator
void
void
boolean
void
void

This method is deprecated.

void
boolean
boolean
boolean
boolean
boolean
canScrollHorizontally(int direction)
boolean
canScrollVertically(int direction)
final void
void
final void
boolean
void
void
static int
combineMeasuredStates(int curState, int newState)
int
int
int
void
WindowInsets
int
int
int
AccessibilityNodeInfo
void
void

This method is deprecated.

boolean
boolean
dispatchNestedFling(float velocityX, float velocityY, boolean consumed)
boolean
dispatchNestedPreFling(float velocityX, float velocityY)
boolean
dispatchNestedPrePerformAccessibilityAction(
    int action,
    Bundle arguments
)
boolean
dispatchNestedPreScroll(
    int dx,
    int dy,
    int[] consumed,
    int[] offsetInWindow
)
boolean
dispatchNestedScroll(
    int dxConsumed,
    int dyConsumed,
    int dxUnconsumed,
    int dyUnconsumed,
    int[] offsetInWindow
)
boolean
void
draw(Canvas canvas)
void
drawableHotspotChanged(float x, float y)
final OnBackInvokedDispatcher
final T
<T extends View> findViewById(int id)
final T
<T extends View> findViewWithTag(Object tag)
boolean

This method is deprecated.

void
forceHasOverlappingRendering(boolean hasOverlappingRendering)
void
void
generateDisplayHash(
    String hashAlgorithm,
    Rect bounds,
    Executor executor,
    DisplayHashResultCallback callback
)
static int
View.AccessibilityDelegate
int
AccessibilityNodeProvider
CharSequence
int
int
String
String
float
Animation
Matrix
IBinder
int[]
Map<IntegerInteger>
String[]
final AutofillId
int
AutofillValue
Drawable
BlendMode
ColorStateList
PorterDuff.Mode
int
final int
float
int
float
Rect
boolean
final boolean
final ContentCaptureSession
CharSequence
final Context
ContextMenu.ContextMenuInfo
final boolean
static int
getDefaultSize(int size, int measureSpec)
Display
final int[]
Bitmap

This method is deprecated.

int

This method is deprecated.

int

This method is deprecated.

void
long
float
int
boolean
boolean
int
ArrayList<View>
getFocusables(int direction)
void
Drawable
int
BlendMode
ColorStateList
PorterDuff.Mode
boolean
getGlobalVisibleRect(Rect r, Point globalOffset)
Handler
float
float
float
float
Runnable
final boolean
final int
void
getHitRect(Rect outRect)
int
int
Drawable
Drawable
int
int
int
int
boolean
KeyEvent.DispatcherState
int
int
int
ViewGroup.LayoutParams
final int
float
int
final boolean
void
getLocationInSurface(int[] location)
void
getLocationInWindow(int[] outLocation)
void
getLocationOnScreen(int[] outLocation)
Matrix
final int
final int
final int
final int
final int
int
int
int
int
int
int
int
int
View.OnFocusChangeListener
int
ViewOutlineProvider
int
int
ViewOverlay
int
int
int
int
int
int
final ViewParent
ViewParent
float
float
PointerIcon
final List<Rect>
String[]
Resources
final boolean
final int
float
int
AttachedSurfaceControl
View
WindowInsets
float
float
float
float
float
int
int
int
int
int
int
final int
final int
int
int
final CharSequence
StateListAnimator
int
int
List<Rect>
int

This method is deprecated.

Object
int
int
CharSequence
final int
float
int
TouchDelegate
ArrayList<View>
float
String
float
float
float
long
int
int
Drawable
Drawable
int
ViewTranslationResponse
ViewTreeObserver
int
final int
int
WindowId
WindowInsetsController
int

This method is deprecated.

IBinder
int
void
float
float
float
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
static View
inflate(Context context, int resource, ViewGroup root)
void

This method is deprecated.

void
void
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean

This method is deprecated.

boolean
boolean
final boolean
final boolean
boolean
final boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
final boolean
final boolean
boolean
boolean
boolean
final boolean
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final boolean
boolean
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boolean
boolean
boolean
boolean
final boolean
boolean
boolean
final boolean
boolean
boolean
boolean
boolean
boolean
View
keyboardNavigationClusterSearch(View currentCluster, int direction)
final void
measure(int widthMeasureSpec, int heightMeasureSpec)
static int[]
mergeDrawableStates(int[] baseState, int[] additionalState)
void
offsetLeftAndRight(int offset)
void
offsetTopAndBottom(int offset)
void
void
WindowInsets
void
boolean
boolean
void
void
InputConnection
void
onCreateViewTranslationRequest(
    int[] supportedFormats,
    Consumer<ViewTranslationRequest> requestsCollector
)
void
onCreateVirtualViewTranslationRequests(
    long[] virtualIds,
    int[] supportedFormats,
    Consumer<ViewTranslationRequest> requestsCollector
)
void
onDisplayHint(int hint)
boolean
void
onDraw(Canvas canvas)
void
final void
boolean
void
void
void
onFocusChanged(
    boolean gainFocus,
    int direction,
    Rect previouslyFocusedRect
)
boolean
void
onHoverChanged(boolean hovered)
boolean
void
void
boolean
onKeyDown(int keyCode, KeyEvent event)
boolean
onKeyLongPress(int keyCode, KeyEvent event)
boolean
onKeyMultiple(int keyCode, int repeatCount, KeyEvent event)
boolean
onKeyPreIme(int keyCode, KeyEvent event)
boolean
onKeyShortcut(int keyCode, KeyEvent event)
boolean
onKeyUp(int keyCode, KeyEvent event)
void
onOverScrolled(
    int scrollX,
    int scrollY,
    boolean clampedX,
    boolean clampedY
)
void
onPointerCaptureChange(boolean hasCapture)
void
void
onProvideAutofillStructure(ViewStructure structure, int flags)
void
void
void
void
ContentInfo
void
void
onRtlPropertiesChanged(int layoutDirection)
Parcelable
void
onScreenStateChanged(int screenState)
void
onScrollCaptureSearch(
    Rect localVisibleRect,
    Point windowOffset,
    Consumer<ScrollCaptureTarget> targets
)
void
onScrollChanged(int l, int t, int oldl, int oldt)
boolean
onSetAlpha(int alpha)
void
onSizeChanged(int w, int h, int oldw, int oldh)
void
boolean
boolean
void
void
void
onVisibilityAggregated(boolean isVisible)
void
onVisibilityChanged(View changedView, int visibility)
void
onWindowFocusChanged(boolean hasWindowFocus)
void

This method is deprecated.

void
onWindowVisibilityChanged(int visibility)
boolean
overScrollBy(
    int deltaX,
    int deltaY,
    int scrollX,
    int scrollY,
    int scrollRangeX,
    int scrollRangeY,
    int maxOverScrollX,
    int maxOverScrollY,
    boolean isTouchEvent
)
boolean
performAccessibilityAction(int action, Bundle arguments)
boolean
boolean
performContextClick(float x, float y)
boolean
performHapticFeedback(int feedbackConstant)
boolean
ContentInfo
void
playSoundEffect(int soundConstant)
boolean
post(Runnable action)
boolean
postDelayed(Runnable action, long delayMillis)
void
void
postInvalidateDelayed(long delayMilliseconds)
void
void
void
postOnAnimationDelayed(Runnable action, long delayMillis)
void
void
boolean
void
void
void
void
void

This method is deprecated.

final boolean
void
void
boolean
final void
final T
<T extends View> requireViewById(int id)
void
static int
resolveSize(int size, int measureSpec)
static int
resolveSizeAndState(int size, int measureSpec, int childMeasuredState)
void
final void
saveAttributeDataForStyleable(
    Context context,
    int[] styleable,
    AttributeSet attrs,
    TypedArray t,
    int defStyleAttr,
    int defStyleRes
)
void
void
scheduleDrawable(Drawable who, Runnable what, long when)
void
scrollBy(int x, int y)
void
scrollTo(int x, int y)
void
sendAccessibilityEvent(int eventType)
void
void
setAccessibilityDataSensitive(int accessibilityDataSensitive)
void
void
setAccessibilityHeading(boolean isHeading)
void
void
setAccessibilityPaneTitle(CharSequence accessibilityPaneTitle)
void
void
void
setAllowClickWhenDisabled(boolean clickableWhenDisabled)
void
void
void
setAlpha(float alpha)
void
void
void
setAutoHandwritingEnabled(boolean enabled)
void
setAutofillHints(String[] autofillHints)
void
void
setBackground(Drawable background)
void
setBackgroundColor(int color)
void

This method is deprecated.

void
void
void
void
final void
setBottom(int bottom)
void
setCameraDistance(float distance)
void
setClickable(boolean clickable)
void
setClipBounds(Rect clipBounds)
void
setClipToOutline(boolean clipToOutline)
void
void
setContentDescription(CharSequence contentDescription)
void
setContextClickable(boolean contextClickable)
void
setDefaultFocusHighlightEnabled(boolean defaultFocusHighlightEnabled)
void

This method is deprecated.

void
setDrawingCacheEnabled(boolean enabled)

This method is deprecated.

void

This method is deprecated.

void
void
setElevation(float elevation)
void
setEnabled(boolean enabled)
void
setFadingEdgeLength(int length)
void
void
setFitsSystemWindows(boolean fitSystemWindows)
void
setFocusable(boolean focusable)
void
setFocusableInTouchMode(boolean focusableInTouchMode)
void
setFocusedByDefault(boolean isFocusedByDefault)
void
setForceDarkAllowed(boolean allow)
void
setForeground(Drawable foreground)
void
void
void
void
setHandwritingBoundsOffsets(
    float offsetLeft,
    float offsetTop,
    float offsetRight,
    float offsetBottom
)
void
void
setHapticFeedbackEnabled(boolean hapticFeedbackEnabled)
void
setHasTransientState(boolean hasTransientState)
void
setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled)
void
setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled)
void
void
void
setHovered(boolean hovered)
void
setId(int id)
void
void
void
void
setIsCredential(boolean isCredential)
void
setIsHandwritingDelegate(boolean isHandwritingDelegate)
void
setKeepScreenOn(boolean keepScreenOn)
void
setKeyboardNavigationCluster(boolean isCluster)
void
setLabelFor(int id)
void
void
setLayerType(int layerType, Paint paint)
void
setLayoutDirection(int layoutDirection)
void
final void
setLeft(int left)
final void
setLeftTopRightBottom(int left, int top, int right, int bottom)
void
setLongClickable(boolean longClickable)
final void
setMeasuredDimension(int measuredWidth, int measuredHeight)
void
setMinimumHeight(int minHeight)
void
setMinimumWidth(int minWidth)
void
setNestedScrollingEnabled(boolean enabled)
void
setNextClusterForwardId(int nextClusterForwardId)
void
setNextFocusDownId(int nextFocusDownId)
void
setNextFocusForwardId(int nextFocusForwardId)
void
setNextFocusLeftId(int nextFocusLeftId)
void
setNextFocusRightId(int nextFocusRightId)
void
setNextFocusUpId(int nextFocusUpId)
void
void
void
void
void
void
void
void
void
void
void
void
setOnReceiveContentListener(
    String[] mimeTypes,
    OnReceiveContentListener listener
)
void
void

This method is deprecated.

void
void
void
void
void
setOverScrollMode(int overScrollMode)
void
setPadding(int left, int top, int right, int bottom)
void
setPaddingRelative(int start, int top, int end, int bottom)
void
setPivotX(float pivotX)
void
setPivotY(float pivotY)
void
final void
setPreferKeepClear(boolean preferKeepClear)
final void
void
setPressed(boolean pressed)
void
final void
setRevealOnFocusHint(boolean revealOnFocus)
final void
setRight(int right)
void
setRotation(float rotation)
void
setRotationX(float rotationX)
void
setRotationY(float rotationY)
void
setSaveEnabled(boolean enabled)
void
setSaveFromParentEnabled(boolean enabled)
void
setScaleX(float scaleX)
void
setScaleY(float scaleY)
void
setScreenReaderFocusable(boolean screenReaderFocusable)
void
setScrollBarDefaultDelayBeforeFade(
    int scrollBarDefaultDelayBeforeFade
)
void
setScrollBarFadeDuration(int scrollBarFadeDuration)
void
setScrollBarSize(int scrollBarSize)
void
setScrollBarStyle(int style)
final void
void
void
setScrollContainer(boolean isScrollContainer)
void
setScrollIndicators(int indicators)
void
setScrollX(int value)
void
setScrollY(int value)
void
setScrollbarFadingEnabled(boolean fadeScrollbars)
void
setSelected(boolean selected)
void
setSoundEffectsEnabled(boolean soundEffectsEnabled)
void
void
void
void
setSystemUiVisibility(int visibility)

This method is deprecated.

void
void
setTextAlignment(int textAlignment)
void
setTextDirection(int textDirection)
void
final void
setTop(int top)
void
void
setTransitionAlpha(float alpha)
final void
setTransitionName(String transitionName)
void
setTransitionVisibility(int visibility)
void
setTranslationX(float translationX)
void
setTranslationY(float translationY)
void
setTranslationZ(float translationZ)
void
setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled)
void
setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled)
void
void
void
void
void
setVisibility(int visibility)
void
setWillNotCacheDrawing(boolean willNotCacheDrawing)

This method is deprecated.

void
setWillNotDraw(boolean willNotDraw)
void
setX(float x)
void
setY(float y)
void
setZ(float z)
boolean
ActionMode
void
final boolean
startDrag(
    ClipData data,
    View.DragShadowBuilder shadowBuilder,
    Object myLocalState,
    int flags
)

This method is deprecated.

final boolean
startDragAndDrop(
    ClipData data,
    View.DragShadowBuilder shadowBuilder,
    Object myLocalState,
    int flags
)
boolean
void
String
void
void
void
final void
boolean
boolean

This method is deprecated.

boolean
From android.view.ViewGroup
void
void
addExtraDataToAccessibilityNodeInfo(
    AccessibilityNodeInfo info,
    String extraDataKey,
    Bundle arguments
)
void
addFocusables(ArrayList<View> views, int direction, int focusableMode)
void
boolean
void
void
addView(View child)
boolean
addViewInLayout(View child, int index, ViewGroup.LayoutParams params)
void
attachLayoutAnimationParameters(
    View child,
    ViewGroup.LayoutParams params,
    int index,
    int count
)
void
attachViewToParent(View child, int index, ViewGroup.LayoutParams params)
void
boolean
void
void
childHasTransientStateChanged(
    View child,
    boolean childHasTransientState
)
void
void
void
void
void
debug(int depth)
void
void
void
detachViewsFromParent(int start, int count)
WindowInsets
boolean
void
void
dispatchCreateViewTranslationRequest(
    Map<AutofillId, long[]> viewIds,
    int[] supportedFormats,
    TranslationCapability capability,
    List<ViewTranslationRequest> requests
)
void
boolean
void
void
dispatchDrawableHotspotChanged(float x, float y)
void
void
boolean
boolean
boolean
boolean
boolean
void
dispatchPointerCaptureChanged(boolean hasCapture)
void
void
void
void
void
dispatchScrollCaptureSearch(
    Rect localVisibleRect,
    Point windowOffset,
    Consumer<ScrollCaptureTarget> targets
)
void
dispatchSetActivated(boolean activated)
void
dispatchSetPressed(boolean pressed)
void
dispatchSetSelected(boolean selected)
void
void

This method is deprecated.

void
boolean
boolean
boolean
dispatchUnhandledMove(View focused, int direction)
void
dispatchVisibilityChanged(View changedView, int visibility)
void
dispatchWindowFocusChanged(boolean hasFocus)
void
void
WindowInsets
WindowInsetsAnimation.Bounds
void

This method is deprecated.

void
boolean
drawChild(Canvas canvas, View child, long drawingTime)
void
void
View
OnBackInvokedDispatcher
void
findViewsWithText(
    ArrayList<View> outViews,
    CharSequence text,
    int flags
)
View
focusSearch(View focused, int direction)
void
boolean
View
getChildAt(int index)
int
int
getChildDrawingOrder(int childCount, int drawingPosition)
static int
getChildMeasureSpec(int spec, int padding, int childDimension)
boolean
boolean
getChildVisibleRect(View child, Rect r, Point offset)
boolean
boolean
int
View
LayoutAnimationController
Animation.AnimationListener
int
LayoutTransition
int
ViewGroupOverlay
int

This method is deprecated.

boolean
boolean
boolean
int
final void
invalidateChild(View child, Rect dirty)

This method is deprecated.

ViewParent
invalidateChildInParent(int[] location, Rect dirty)

This method is deprecated.

boolean

This method is deprecated.

boolean

This method is deprecated.

boolean
boolean

This method is deprecated.

boolean
boolean
boolean
void
final void
layout(int l, int t, int r, int b)
void
measureChild(
    View child,
    int parentWidthMeasureSpec,
    int parentHeightMeasureSpec
)
void
measureChildWithMargins(
    View child,
    int parentWidthMeasureSpec,
    int widthUsed,
    int parentHeightMeasureSpec,
    int heightUsed
)
void
measureChildren(int widthMeasureSpec, int heightMeasureSpec)
void
notifySubtreeAccessibilityStateChanged(
    View child,
    View source,
    int changeType
)
final void
final void
void
int[]
onCreateDrawableState(int extraSpace)
void
void
boolean
boolean
boolean
onNestedFling(
    View target,
    float velocityX,
    float velocityY,
    boolean consumed
)
boolean
onNestedPreFling(View target, float velocityX, float velocityY)
boolean
onNestedPrePerformAccessibilityAction(
    View target,
    int action,
    Bundle args
)
void
onNestedPreScroll(View target, int dx, int dy, int[] consumed)
void
onNestedScroll(
    View target,
    int dxConsumed,
    int dyConsumed,
    int dxUnconsumed,
    int dyUnconsumed
)
void
onNestedScrollAccepted(View child, View target, int axes)
boolean
PointerIcon
onResolvePointerIcon(MotionEvent event, int pointerIndex)
boolean
onStartNestedScroll(View child, View target, int nestedScrollAxes)
void
void
void
void
void
void
void
removeDetachedView(View child, boolean animate)
void
void
removeViewAt(int index)
void
void
removeViews(int start, int count)
void
removeViewsInLayout(int start, int count)
boolean
requestChildRectangleOnScreen(
    View child,
    Rect rectangle,
    boolean immediate
)
void
requestDisallowInterceptTouchEvent(boolean disallowIntercept)
boolean
requestFocus(int direction, Rect previouslyFocusedRect)
boolean
void
boolean
void
void
setAddStatesFromChildren(boolean addsStates)
void

This method is deprecated.

void
setAnimationCacheEnabled(boolean enabled)

This method is deprecated.

void

This method is deprecated.

void
void

This method is deprecated.

void
setClipChildren(boolean clipChildren)
void
setClipToPadding(boolean clipToPadding)
void
setDescendantFocusability(int focusability)
void
void
void
setLayoutMode(int layoutMode)
void
void
void
void
setPersistentDrawingCache(int drawingCacheToKeep)

This method is deprecated.

void
void
setTouchscreenBlocksFocus(boolean touchscreenBlocksFocus)
void
setTransitionGroup(boolean isTransitionGroup)
void
boolean
ActionMode
startActionModeForChild(
    View originalView,
    ActionMode.Callback callback
)
void
void
void
suppressLayout(boolean suppress)
void

Public constructors

Picker

Added in 1.1.0
public Picker(@NonNull Context context, @Nullable AttributeSet attributeSet)

Creates a Picker widget.

Picker

Added in 1.1.0
public Picker(
    @NonNull Context context,
    @Nullable AttributeSet attrs,
    int defStyleAttr
)

Creates a Picker widget.

Public methods

addOnValueChangedListener

Added in 1.1.0
public void addOnValueChangedListener(@NonNull Picker.PickerValueListener listener)

Register a callback to be invoked when the picker's value has changed.

Parameters
@NonNull Picker.PickerValueListener listener

The callback to ad

dispatchKeyEvent

public boolean dispatchKeyEvent(KeyEvent event)

getActivatedVisibleItemCount

Added in 1.1.0
public float getActivatedVisibleItemCount()

Returns number of visible items showing in a column when it's activated. The default value is 3.

Returns
float

Number of visible items showing in a column when it's activated.

getColumnAt

Added in 1.1.0
public @Nullable PickerColumn getColumnAt(int colIndex)

Get nth PickerColumn.

Parameters
int colIndex

Index of PickerColumn.

Returns
@Nullable PickerColumn

PickerColumn at colIndex or null if setColumns is not called yet.

getColumnsCount

Added in 1.1.0
public int getColumnsCount()

Get number of PickerColumns.

Returns
int

Number of PickerColumns or 0 if setColumns is not called yet.

getPickerItemLayoutId

Added in 1.1.0
public final @LayoutRes int getPickerItemLayoutId()

Classes extending Picker can call setPickerItemLayoutId to supply the Picker's item's layout id

getPickerItemTextViewId

Added in 1.1.0
public final @IdRes int getPickerItemTextViewId()

Returns the Picker's item's TextView's id from within the layout provided by getPickerItemLayoutId or 0 if the layout provided by getPickerItemLayoutId is a {link TextView}.

getSelectedColumn

Added in 1.1.0
public int getSelectedColumn()

Get current activated column index.

Returns
int

Current activated column index.

getSeparator

Added in 1.1.0
Deprecated in 1.1.0
public final CharSequence getSeparator()

Gets separator string between columns.

Returns
CharSequence

The separator that will be populated between all the Picker columns.

getSeparators

Added in 1.1.0
public final @NonNull List<CharSequencegetSeparators()

Returns the list of separators that will be populated between the picker column fields.

Returns
@NonNull List<CharSequence>

The list of separators populated between the picker column fields.

getVisibleItemCount

Added in 1.1.0
public float getVisibleItemCount()

Returns number of visible items showing in a column when it's not activated. The default value is 1.

Returns
float

Number of visible items showing in a column when it's not activated.

onColumnValueChanged

Added in 1.1.0
public void onColumnValueChanged(int columnIndex, int newValue)

Classes extending Picker can override this function to supply the behavior when a list has been scrolled. Subclass may call setColumnValue and or setColumnAt. Subclass should not directly call setCurrentValue which does not update internal state or notify listeners.

Parameters
int columnIndex

index of which column was changed.

int newValue

A new value desired to be set on the column.

removeOnValueChangedListener

Added in 1.1.0
public void removeOnValueChangedListener(
    @NonNull Picker.PickerValueListener listener
)

Remove a previously installed value changed callback

Parameters
@NonNull Picker.PickerValueListener listener

The callback to remove.

requestChildFocus

public void requestChildFocus(View child, View focused)

setActivated

public void setActivated(boolean activated)

setActivatedVisibleItemCount

Added in 1.1.0
public void setActivatedVisibleItemCount(float visiblePickerItems)

Changes number of visible items showing in a column when it's activated. The default value is 3.

Parameters
float visiblePickerItems

Number of visible items showing in a column when it's activated.

setColumnAt

Added in 1.1.0
public void setColumnAt(int columnIndex, @NonNull PickerColumn column)

When column labels change or column range changes, call this function to re-populate the selection list. Note this function cannot be called from RecyclerView layout/scroll pass.

Parameters
int columnIndex

Index of column to update.

@NonNull PickerColumn column

New column to update.

setColumnValue

Added in 1.1.0
public void setColumnValue(int columnIndex, int value, boolean runAnimation)

Manually set current value of a column. The function will update UI and notify listeners.

Parameters
int columnIndex

Index of column to update.

int value

New value of the column.

boolean runAnimation

True to scroll to the value or false otherwise.

setColumns

Added in 1.1.0
public void setColumns(@NonNull List<PickerColumn> columns)

Set columns and create Views.

Parameters
@NonNull List<PickerColumn> columns

The actual focusable columns of a picker which are scrollable if the field takes more than one value (e.g. for a DatePicker, day, month, and year fields and for TimePicker, hour, minute, and am/pm fields form the columns).

setPickerItemLayoutId

Added in 1.1.0
public final void setPickerItemLayoutId(@LayoutRes int pickerItemLayoutId)

Sets the layout to use for picker items.

Parameters
@LayoutRes int pickerItemLayoutId

Layout resource id to use for picker items.

setPickerItemTextViewId

Added in 1.1.0
public final void setPickerItemTextViewId(@IdRes int textViewId)

Sets the Picker's item's TextView's id from within the layout provided by getPickerItemLayoutId or 0 if the layout provided by getPickerItemLayoutId is a {link TextView}.

Parameters
@IdRes int textViewId

View id of TextView inside a Picker item, or 0 if the Picker item is a TextView.

setSelectedColumn

Added in 1.1.0
public void setSelectedColumn(int columnIndex)

Change current selected column. Picker shows multiple items on selected column if Picker has focus. Picker shows multiple items on all column if Picker has no focus (e.g. a Touchscreen screen).

Parameters
int columnIndex

Index of column to activate.

setSeparator

Added in 1.1.0
public final void setSeparator(@NonNull CharSequence separator)

Sets separator String between Picker columns.

Parameters
@NonNull CharSequence separator

Separator String between Picker columns.

setSeparators

Added in 1.1.0
public final void setSeparators(@NonNull List<CharSequence> separators)

Sets the list of separators that will be populated between the Picker columns. The number of the separators should be either 1 indicating the same separator used between all the columns fields (and nothing will be placed before the first and after the last column), or must be one unit larger than the number of columns passed to setColumns. In the latter case, the list of separators corresponds to the positions before the first column all the way to the position after the last column. An empty string for a given position indicates no separators needs to be placed for that position, otherwise a TextView with the given String will be created and placed there.

Parameters
@NonNull List<CharSequence> separators

The list of separators to be populated between the Picker columns.

setVisibleItemCount

Added in 1.1.0
public void setVisibleItemCount(float pickerItems)

Changes number of visible items showing in a column when it's not activated. The default value is 1.

Parameters
float pickerItems

Number of visible items showing in a column when it's not activated.

Protected methods

getPickerItemHeightPixels

Added in 1.1.0
protected int getPickerItemHeightPixels()

Classes extending Picker can choose to override this method to supply the Picker's column's single item height in pixels.

onRequestFocusInDescendants

protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect)