de.codecrafters.tableview.toolkit

Class EndlessOnScrollListener

java.lang.Object

de.codecrafters.tableview.toolkit.EndlessOnScrollListener

All Implemented Interfaces:

OnScrollListener

public abstract class EndlessOnScrollListener
extends java.lang.Object
implements OnScrollListener

A OnScrollListener that will trigger loading of further items when the end of the list is reached.

Nested Class Summary

Nested classes/interfaces inherited from interface de.codecrafters.tableview.listeners.OnScrollListener

OnScrollListener.ScrollState

Constructor Summary

Constructors

Constructor and Description
EndlessOnScrollListener() Creates a new EndlessOnScrollListener that has a default threshold of 5 rows.
EndlessOnScrollListener(int rowThreshold) Creates a new EndlessOnScrollListener with the given row threshold.

Method Summary

Modifier and Type	Method and Description
abstract void	onReloadingTriggered(int firstRowItem, int visibleRowCount, int totalRowCount) Callback method when the user reached the row threshold to load more items.
void	onScroll(android.widget.ListView tableDataView, int firstVisibleItem, int visibleItemCount, int totalItemCount) Callback method to be invoked when the list or grid has been scrolled.
void	onScrollStateChanged(android.widget.ListView view, OnScrollListener.ScrollState scrollState) Callback method to be invoked while the table data view is being scrolled.

Methods inherited from class java.lang.Object

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

Constructor Detail

EndlessOnScrollListener

public EndlessOnScrollListener()

Creates a new EndlessOnScrollListener that has a default threshold of 5 rows. This means if the user scrolls up to the 5th last row, a loading of further items is triggered.

EndlessOnScrollListener

public EndlessOnScrollListener(int rowThreshold)

Creates a new EndlessOnScrollListener with the given row threshold. The row threshold defines, when the reloading is triggered. E.g. a rowThreshold of 3 would mean a loading is triggered when the user reaches the 3rd last row.

Parameters:

rowThreshold - The row threshold that shall be used.

Method Detail

onScroll

public void onScroll(android.widget.ListView tableDataView,
                     int firstVisibleItem,
                     int visibleItemCount,
                     int totalItemCount)

Description copied from interface: OnScrollListener

Callback method to be invoked when the list or grid has been scrolled. This will be called after the scroll has completed.

Specified by:

onScroll in interface OnScrollListener

Parameters:

tableDataView - The view whose scroll state is being reported.

firstVisibleItem - The index of the first visible row (ignore if visibleItemCount == 0).

visibleItemCount - The number of visible rows.

totalItemCount - The number of items in the TableDataAdapter.

onScrollStateChanged

public void onScrollStateChanged(android.widget.ListView view,
                                 OnScrollListener.ScrollState scrollState)

Description copied from interface: OnScrollListener

Callback method to be invoked while the table data view is being scrolled. If the view is being scrolled, this method will be called before the next frame of the scroll is rendered.

Specified by:

onScrollStateChanged in interface OnScrollListener

Parameters:

view - The view whose scroll state is being reported.

scrollState - he current scroll state. One of OnScrollListener.ScrollState.TOUCH_SCROLL or OnScrollListener.ScrollState.IDLE.

onReloadingTriggered

public abstract void onReloadingTriggered(int firstRowItem,
                                          int visibleRowCount,
                                          int totalRowCount)

Callback method when the user reached the row threshold to load more items.

Parameters:

firstRowItem - The index of the first visible row.

visibleRowCount - The number of rows that are visible.

totalRowCount - The total number of rows.