如何解决RowsSupportFragment onItemSelected() 回调在第一次加载页面时默认调用
RowsSupportFragment onItemSelected() 回调在第一次加载页面时被默认调用,即使该项目未被选中并且焦点位于其他元素上。
我有一个用户界面,其中有按钮和屏幕底部的 RowsSupportFragment。当活动第一次加载时,RowsSupportFragment 的 onItemSelected() 被默认调用,方法是将 RowsSupportFragment 的第一项作为项目传入。认为第一项还没有获得焦点(或)正在被选中。
现在当我按下 D-pad 并移动到 RowsSupportFragment 时,第一个项目有焦点并被选中但没有触发 onItemSelected() 回调,当我移动到下一个项目时会触发后续回调。
根据文档。
/**
* Interface for receiving notification when a row or item becomes selected. The concept of
* current selection is different than focus. A row or item can be selected without having focus;
* for example,when a row header view gains focus then the corresponding row view becomes selected.
*/
public interface BaSEOnItemViewSelectedListener<T> {
/**
* Called when a row or a new item becomes selected.
* <p>
* For a non {@link ListRow} case,parameter item may be null. Event is fired when
* selection changes between rows,regardless if row view has focus or not.
* <p>
* For a {@link ListRow} case,parameter item is null if the list row is empty.
* </p>
* <p>
* In the case of a grid,the row parameter is always null.
* </p>
* <li>
* Row has focus: event is fired when focus changes between children of the row.
* </li>
* <li>
* No row has focus: the event is fired with the currently selected row and last
* focused item in the row.
* </li>
*
* @param itemViewHolder The view holder of the item that is currently selected.
* @param item The item that is currently selected.
* @param rowViewHolder The view holder of the row that is currently selected.
* @param row The row that is currently selected.
*/
public void onItemSelected(Presenter.ViewHolder itemViewHolder,Object item,RowPresenter.ViewHolder rowViewHolder,T row);
}
但我没有任何与 RowsSupportFragment 相关的标题。
我该如何改变这种行为?
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