您需要重写 OnGroupClickListener 并使用该事件。这将避免 ExpandableListView 执行默认操作,至少在针对 4.3 进行编译时是平滑滚动到该位置。
这是一个实现示例:
expandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
if(parent.isGroupExpanded(groupPosition)){
parent.collapseGroup(groupPosition);
}else{
boolean animateExpansion = false;
parent.expandGroup(groupPosition,animateExpansion);
}
//telling the listView we have handled the group click, and don't want the default actions.
return true;
}
});
如果您使用该事件,则需要在需要时复制一些默认行为。这包括播放音效和调用展开/折叠侦听器。
为了参考默认行为,我将发布它,取自 Android 源代码 (4.3)
//in ExpandableListView.java
boolean handleItemClick(View v, int position, long id) {
final PositionMetadata posMetadata = mConnector.getUnflattenedPos(position);
id = getChildOrGroupId(posMetadata.position);
boolean returnValue;
if (posMetadata.position.type == ExpandableListPosition.GROUP) {
/* It's a group, so handle collapsing/expanding */
/* It's a group click, so pass on event */
if (mOnGroupClickListener != null) {
if (mOnGroupClickListener.onGroupClick(this, v,
posMetadata.position.groupPos, id)) {
posMetadata.recycle();
return true;
}
}
if (posMetadata.isExpanded()) {
/* Collapse it */
mConnector.collapseGroup(posMetadata);
playSoundEffect(SoundEffectConstants.CLICK);
if (mOnGroupCollapseListener != null) {
mOnGroupCollapseListener.onGroupCollapse(posMetadata.position.groupPos);
}
} else {
/* Expand it */
mConnector.expandGroup(posMetadata);
playSoundEffect(SoundEffectConstants.CLICK);
if (mOnGroupExpandListener != null) {
mOnGroupExpandListener.onGroupExpand(posMetadata.position.groupPos);
}
final int groupPos = posMetadata.position.groupPos;
final int groupFlatPos = posMetadata.position.flatListPos;
final int shiftedGroupPosition = groupFlatPos + getHeaderViewsCount();
smoothScrollToPosition(shiftedGroupPosition + mAdapter.getChildrenCount(groupPos),
shiftedGroupPosition);
}
returnValue = true;
} else {
/* It's a child, so pass on event */
if (mOnChildClickListener != null) {
playSoundEffect(SoundEffectConstants.CLICK);
return mOnChildClickListener.onChildClick(this, v, posMetadata.position.groupPos,
posMetadata.position.childPos, id);
}
returnValue = false;
}
posMetadata.recycle();
return returnValue;
}