rouchuan.customlayoutmanager

Class ViewPagerLayoutManager

java.lang.Object

RecyclerView.LayoutManager

rouchuan.customlayoutmanager.ViewPagerLayoutManager

public abstract class ViewPagerLayoutManager
extends RecyclerView.LayoutManager

Created by Dajavu on 12/7/16.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ViewPagerLayoutManager.OnPageChangeListener

Field Summary

Fields

Modifier and Type	Field and Description
protected float	interval
protected int	mDecoratedChildHeight
protected int	mDecoratedChildWidth
protected float	offset
protected int	startLeft
protected int	startTop

Constructor Summary

Constructors

Constructor and Description
ViewPagerLayoutManager()
ViewPagerLayoutManager(boolean shouldReverseLayout)

Method Summary

Modifier and Type	Method and Description
protected int	calItemLeftPosition(float targetOffset)
protected int	calItemTopPosition(float targetOffset)
boolean	canScrollHorizontally()
int	computeHorizontalScrollExtent(RecyclerView.State state)
int	computeHorizontalScrollOffset(RecyclerView.State state)
int	computeHorizontalScrollRange(RecyclerView.State state)
android.graphics.PointF	computeScrollVectorForPosition(int targetPosition)
android.view.View	findViewByPosition(int position)
RecyclerView.LayoutParams	generateDefaultLayoutParams()
int	getCurrentPosition()
protected float	getDistanceRatio()
protected int	getHorizontalSpace()
int	getOffsetCenterView()
boolean	getStackFromEnd()
protected int	getVerticalSpace()
boolean	isSmoothScrollbarEnabled() Returns the current state of the smooth scrollbar feature.
protected float	maxRemoveOffset()
protected float	minRemoveOffset()
void	onAdapterChanged(RecyclerView.Adapter oldAdapter, RecyclerView.Adapter newAdapter)
void	onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state)
void	onRestoreInstanceState(android.os.Parcelable state)
android.os.Parcelable	onSaveInstanceState()
protected float	propertyChangeWhenScroll(android.view.View itemView)
int	scrollHorizontallyBy(int dx, RecyclerView.Recycler recycler, RecyclerView.State state)
void	scrollToPosition(int position)
void	setEnableEndlessScroll(boolean enable)
protected abstract float	setInterval()
protected abstract void	setItemViewProperty(android.view.View itemView, float targetOffset)
void	setOnPageChangeListener(ViewPagerLayoutManager.OnPageChangeListener onPageChangeListener)
void	setSmoothScrollbarEnabled(boolean enabled) When smooth scrollbar is enabled, the position and size of the scrollbar thumb is computed based on the number of visible pixels in the visible items.
void	setStackFromEnd(boolean stackFromEnd)
protected abstract void	setUp() You can set up your own properties here or change the exist properties like startLeft and startTop
void	smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

mDecoratedChildWidth

protected int mDecoratedChildWidth

mDecoratedChildHeight

protected int mDecoratedChildHeight

startLeft

protected int startLeft

startTop

protected int startTop

offset

protected float offset

interval

protected float interval

Constructor Detail

ViewPagerLayoutManager

public ViewPagerLayoutManager()

ViewPagerLayoutManager

public ViewPagerLayoutManager(boolean shouldReverseLayout)

Method Detail

setInterval

protected abstract float setInterval()

Returns:

the interval of each item's offset

setUp

protected abstract void setUp()

You can set up your own properties here or change the exist properties like startLeft and startTop

setItemViewProperty

protected abstract void setItemViewProperty(android.view.View itemView,
                                            float targetOffset)

onLayoutChildren

public void onLayoutChildren(RecyclerView.Recycler recycler,
                             RecyclerView.State state)

findViewByPosition

public android.view.View findViewByPosition(int position)

canScrollHorizontally

public boolean canScrollHorizontally()

onAdapterChanged

public void onAdapterChanged(RecyclerView.Adapter oldAdapter,
                             RecyclerView.Adapter newAdapter)

onSaveInstanceState

public android.os.Parcelable onSaveInstanceState()

onRestoreInstanceState

public void onRestoreInstanceState(android.os.Parcelable state)

generateDefaultLayoutParams

public RecyclerView.LayoutParams generateDefaultLayoutParams()

scrollToPosition

public void scrollToPosition(int position)

smoothScrollToPosition

public void smoothScrollToPosition(RecyclerView recyclerView,
                                   RecyclerView.State state,
                                   int position)

computeScrollVectorForPosition

public android.graphics.PointF computeScrollVectorForPosition(int targetPosition)

computeHorizontalScrollOffset

public int computeHorizontalScrollOffset(RecyclerView.State state)

computeHorizontalScrollExtent

public int computeHorizontalScrollExtent(RecyclerView.State state)

computeHorizontalScrollRange

public int computeHorizontalScrollRange(RecyclerView.State state)

scrollHorizontallyBy

public int scrollHorizontallyBy(int dx,
                                RecyclerView.Recycler recycler,
                                RecyclerView.State state)

calItemLeftPosition

protected int calItemLeftPosition(float targetOffset)

calItemTopPosition

protected int calItemTopPosition(float targetOffset)

getHorizontalSpace

protected int getHorizontalSpace()

getVerticalSpace

protected int getVerticalSpace()

maxRemoveOffset

protected float maxRemoveOffset()

minRemoveOffset

protected float minRemoveOffset()

propertyChangeWhenScroll

protected float propertyChangeWhenScroll(android.view.View itemView)

getDistanceRatio

protected float getDistanceRatio()

getCurrentPosition

public int getCurrentPosition()

getOffsetCenterView

public int getOffsetCenterView()

setOnPageChangeListener

public void setOnPageChangeListener(ViewPagerLayoutManager.OnPageChangeListener onPageChangeListener)

setEnableEndlessScroll

public void setEnableEndlessScroll(boolean enable)

setSmoothScrollbarEnabled

public void setSmoothScrollbarEnabled(boolean enabled)

When smooth scrollbar is enabled, the position and size of the scrollbar thumb is computed based on the number of visible pixels in the visible items. This however assumes that all list items have similar or equal widths or heights (depending on list orientation). If you use a list in which items have different dimensions, the scrollbar will change appearance as the user scrolls through the list. To avoid this issue, you need to disable this property.

When smooth scrollbar is disabled, the position and size of the scrollbar thumb is based solely on the number of items in the adapter and the position of the visible items inside the adapter. This provides a stable scrollbar as the user navigates through a list of items with varying widths / heights.

Parameters:

enabled - Whether or not to enable smooth scrollbar.

See Also:

setSmoothScrollbarEnabled(boolean)

setStackFromEnd

public void setStackFromEnd(boolean stackFromEnd)

getStackFromEnd

public boolean getStackFromEnd()

isSmoothScrollbarEnabled

public boolean isSmoothScrollbarEnabled()

Returns the current state of the smooth scrollbar feature. It is enabled by default.

Returns:

True if smooth scrollbar is enabled, false otherwise.

See Also:

setSmoothScrollbarEnabled(boolean)