@Override
protected final ListView createRefreshableView(Context context, AttributeSet attrs) {
ListView lv = new InternalListView(context, attrs);
// Get Styles from attrs
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.PullToRefresh);
// Create Loading Views ready for use later
FrameLayout frame = new FrameLayout(context);
mHeaderLoadingView = new LoadingLayout(context, Mode.PULL_DOWN_TO_REFRESH, a);
frame.addView(
mHeaderLoadingView,
FrameLayout.LayoutParams.MATCH_PARENT,
FrameLayout.LayoutParams.WRAP_CONTENT);
mHeaderLoadingView.setVisibility(View.GONE);
lv.addHeaderView(frame, null, false);
mLvFooterLoadingFrame = new FrameLayout(context);
mFooterLoadingView = new LoadingLayout(context, Mode.PULL_UP_TO_REFRESH, a);
mLvFooterLoadingFrame.addView(
mFooterLoadingView,
FrameLayout.LayoutParams.MATCH_PARENT,
FrameLayout.LayoutParams.WRAP_CONTENT);
mFooterLoadingView.setVisibility(View.GONE);
a.recycle();
// Set it to this so it can be used in ListActivity/ListFragment
lv.setId(android.R.id.list);
return lv;
}
public void setReleaseLabel(String releaseLabel, Mode mode) {
super.setReleaseLabel(releaseLabel, mode);
if (null != mHeaderLoadingView && mode.canPullDown()) {
mHeaderLoadingView.setReleaseLabel(releaseLabel);
}
if (null != mFooterLoadingView && mode.canPullUp()) {
mFooterLoadingView.setReleaseLabel(releaseLabel);
}
}
@Override
protected void setRefreshingInternal(boolean doScroll) {
// If we're not showing the Refreshing view, or the list is empty, then
// the header/footer views won't show so we use the
// normal method
ListAdapter adapter = mRefreshableView.getAdapter();
if (!getShowViewWhileRefreshing() || null == adapter || adapter.isEmpty()) {
super.setRefreshingInternal(doScroll);
return;
}
super.setRefreshingInternal(false);
final LoadingLayout originalLoadingLayout, listViewLoadingLayout;
final int selection, scrollToY;
switch (getCurrentMode()) {
case PULL_UP_TO_REFRESH:
originalLoadingLayout = getFooterLayout();
listViewLoadingLayout = mFooterLoadingView;
selection = mRefreshableView.getCount() - 1;
scrollToY = getScrollY() - getHeaderHeight();
break;
case PULL_DOWN_TO_REFRESH:
default:
originalLoadingLayout = getHeaderLayout();
listViewLoadingLayout = mHeaderLoadingView;
selection = 0;
scrollToY = getScrollY() + getHeaderHeight();
break;
}
if (doScroll) {
// We scroll slightly so that the ListView's header/footer is at the
// same Y position as our normal header/footer
setHeaderScroll(scrollToY);
}
// Hide our original Loading View
originalLoadingLayout.setVisibility(View.INVISIBLE);
// Show the ListView Loading View and set it to refresh
listViewLoadingLayout.setVisibility(View.VISIBLE);
listViewLoadingLayout.refreshing();
if (doScroll) {
// Make sure the ListView is scrolled to show the loading
// header/footer
mRefreshableView.setSelection(selection);
// Smooth scroll as normal
smoothScrollTo(0);
}
}
@Override
protected void resetHeader() {
// If we're not showing the Refreshing view, or the list is empty, then
// the header/footer views won't show so we use the
// normal method
ListAdapter adapter = mRefreshableView.getAdapter();
if (!getShowViewWhileRefreshing() || null == adapter || adapter.isEmpty()) {
super.resetHeader();
return;
}
LoadingLayout originalLoadingLayout;
LoadingLayout listViewLoadingLayout;
int scrollToHeight = getHeaderHeight();
int selection;
boolean scroll;
switch (getCurrentMode()) {
case PULL_UP_TO_REFRESH:
originalLoadingLayout = getFooterLayout();
listViewLoadingLayout = mFooterLoadingView;
selection = mRefreshableView.getCount() - 1;
scroll = mRefreshableView.getLastVisiblePosition() == selection;
break;
case PULL_DOWN_TO_REFRESH:
default:
originalLoadingLayout = getHeaderLayout();
listViewLoadingLayout = mHeaderLoadingView;
scrollToHeight *= -1;
selection = 0;
scroll = mRefreshableView.getFirstVisiblePosition() == selection;
break;
}
// Set our Original View to Visible
originalLoadingLayout.setVisibility(View.VISIBLE);
/**
* Scroll so the View is at the same Y as the ListView header/footer, but only scroll if we've
* pulled to refresh and it's positioned correctly
*/
if (scroll && getState() != MANUAL_REFRESHING) {
mRefreshableView.setSelection(selection);
setHeaderScroll(scrollToHeight);
}
// Hide the ListView Header/Footer
listViewLoadingLayout.setVisibility(View.GONE);
super.resetHeader();
}