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Update MainActivity.java #2

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11 changes: 8 additions & 3 deletions PinnedHeaderExpandableListView/src/com/ryg/expandable/MainActivity.java
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Original file line number Diff line number Diff line change
Expand Up @@ -275,9 +275,12 @@ public View getPinnedHeader() {

@Override
public void updatePinnedHeader(View headerView, int firstVisibleGroupPos) {
Group firstVisibleGroup = (Group) adapter.getGroup(firstVisibleGroupPos);
TextView textView = (TextView) headerView.findViewById(R.id.group);
textView.setText(firstVisibleGroup.getTitle());
if (adapter.getGroupCount() > 0) { // 防止列表在无数据的情况崩溃
Group firstVisibleGroup = (Group) adapter.getGroup(firstVisibleGroupPos);
TextView textView = (TextView) headerView.findViewById(R.id.group);
textView.setText(firstVisibleGroup.getTitle());
}

}

@Override
Expand All @@ -286,6 +289,8 @@ public boolean giveUpTouchEvent(MotionEvent event) {
View view = expandableListView.getChildAt(0);
if (view != null && view.getTop() >= 0) {
return true;
} else if (adapter.getGroupCount == 0) { //保证列表没有数据的情况下，头部隐藏后还能继续下拉显示出来
return true;
}
}
return false;
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