我在 Activity 的 Fragment A 中得到了 Fragment B。按预期工作。单击片段 B 中的项目时,我想显示一个上下文菜单栏。
我正在使用 ActionbarSherlock。我在片段 B 中做了什么:
private ActionMode.Callback mActionModeCallback = new ActionMode.Callback() {
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
MenuInflater inflater = mode.getMenuInflater();
inflater.inflate(R.menu.entry_list_context_menu, menu);
return true;
}
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
// make sure no item is selected when bar is shown
adapter.clearSelection();
adapter.notifyDataSetChanged();
return false;
}
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
Log.d("EntryList", "Item '" + item.getTitle()
+ "' clicked [onActionItemClicked()]");
return true;
}
@Override
public void onDestroyActionMode(ActionMode mode) {
adapter.clearSelection();
adapter.notifyDataSetChanged();
contextualMode = null;
}
};
private ActionMode contextualMode;
@Override
public void onItemClick(AdapterView<?> parentView, View itemView,
int index, long id) {
DocumentEntity entry = (DocumentEntity) itemView.getTag();
// something went wrong
if (entry == null) {
Log.e("EntryList", "Tag-Less item clicked [onItemClick()]");
return;
}
if (contextualMode != null) {
Log.d("EntryList",
"contextualMode is not yet initialized [onItemClick()]");
contextualMode = getSherlockActivity().startActionMode(
mActionModeCallback);
} else {
Log.d("EntryList",
"contextualMode already initialized [onItemClick()]");
}
entry.setSelected(!entry.isSelected());
Log.d("EntryList", "entry.selected set to " + entry.isSelected()
+ " [onItemClick()]");
}
选择效果很好,但没有显示上下文操作栏。调试结果是:
contextualMode 已初始化 [onItemClick()] entry.selected 设置为 'true' [onItemClick()]
没有设置 contextualMode 的其他位置...