android.widget
Interface AbsListView.OnScrollListener

Enclosing class:

AbsListView

public static interface AbsListView.OnScrollListener

Interface definition for a callback to be invoked when the list or grid has been scrolled.

Field Summary

static int	SCROLL_STATE_FLING The user had previously been scrolling using touch and had performed a fling.
static int	SCROLL_STATE_IDLE The view is not scrolling.
static int	SCROLL_STATE_TOUCH_SCROLL The user is scrolling using touch, and their finger is still on the screen

Method Summary

void	onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) Callback method to be invoked when the list or grid has been scrolled.
void	onScrollStateChanged(AbsListView view, int scrollState) Callback method to be invoked while the list view or grid view is being scrolled.

Field Detail

SCROLL_STATE_IDLE

static final int SCROLL_STATE_IDLE

The view is not scrolling. Note navigating the list using the trackball counts as being in the idle state since these transitions are not animated.

See Also:

Constant Field Values

SCROLL_STATE_TOUCH_SCROLL

static final int SCROLL_STATE_TOUCH_SCROLL

The user is scrolling using touch, and their finger is still on the screen

See Also:

Constant Field Values

SCROLL_STATE_FLING

static final int SCROLL_STATE_FLING

The user had previously been scrolling using touch and had performed a fling. The animation is now coasting to a stop

See Also:

Constant Field Values

Method Detail

onScrollStateChanged

void onScrollStateChanged(AbsListView view,
                          int scrollState)

Callback method to be invoked while the list view or grid view is being scrolled. If the view is being scrolled, this method will be called before the next frame of the scroll is rendered. In particular, it will be called before any calls to Adapter.getView(int, View, ViewGroup).

Parameters:

view - The view whose scroll state is being reported

scrollState - The current scroll state. One of SCROLL_STATE_IDLE, SCROLL_STATE_TOUCH_SCROLL or SCROLL_STATE_IDLE.

onScroll

void onScroll(AbsListView view,
              int firstVisibleItem,
              int visibleItemCount,
              int totalItemCount)

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

Parameters:

view - The view whose scroll state is being reported

firstVisibleItem - the index of the first visible cell (ignore if visibleItemCount == 0)

visibleItemCount - the number of visible cells

totalItemCount - the number of items in the list adaptor