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Commit 4884c642 authored by Adam Powell's avatar Adam Powell
Browse files

Add AbsListView#fling 

ScrollViews can programmatically fling from public API and now
ListViews/GridViews can too. This helps support applications that wish
to propagate flings across scrolling containers as part of nested
scrolling.

Bug 15538504

Change-Id: I0318c6717c7fb8788a006f96c8f8170556dd8b9e
parent fb7d2c4c

api/current.txt

+1 −0
Original line number Diff line number Diff line
@@ -37498,6 +37498,7 @@ package android.widget { 
    method public void clearChoices();

    method public void clearTextFilter();

    method public void deferNotifyDataSetChanged();

    method public void fling(int);

    method public int getCacheColorHint();

    method public int getCheckedItemCount();

    method public long[] getCheckedItemIds();

core/java/android/widget/AbsListView.java

+16 −0
Original line number Diff line number Diff line
@@ -3996,6 +3996,22 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te 
        return super.onGenericMotionEvent(event);

    }



    /**

     * Initiate a fling with the given velocity.

     *

     * <p>Applications can use this method to manually initiate a fling as if the user

     * initiated it via touch interaction.</p>

     *

     * @param velocityY Vertical velocity in pixels per second

     */

    public void fling(int velocityY) {

        if (mFlingRunnable == null) {

            mFlingRunnable = new FlingRunnable();

        }

        reportScrollStateChange(OnScrollListener.SCROLL_STATE_FLING);

        mFlingRunnable.start(-velocityY);

    }



    @Override

    public boolean onStartNestedScroll(View child, View target, int nestedScrollAxes) {

        return ((nestedScrollAxes & SCROLL_AXIS_VERTICAL) != 0);