android 如何避免在 UI 更新时关闭工具栏的搜索视图编辑文本行？

Question

我的工具栏中有一个SearchView，用于CardViews的RecyclerView列表，它们保存在Room数据库中。我通过SearchView用搜索文本过滤列表，然后左键滑动其中一张返回的卡，将其从数据库中删除。UI将正确更新，以显示任何剩余的已筛选CardViews。

问题是当我点击"；x〃；，我在搜索EditText行右侧设置的关闭按钮。左滑动删除过滤卡后，过滤列表正确消失，用户界面正确更新数据库中剩余CardViews的新列表。然而，在UI的更新期间，搜索EditText行和；X〃；关闭按钮被破坏，工具栏返回显示我设置的SearchView的默认状态，即显示图标化的搜索图标。

然而，我想保持搜索EditText行打开，清除搜索文本并保留"编辑文本"；x〃；UI更新后，EdixtText行右侧的关闭按钮。

我尝试将以下代码片段添加到mSearchView、searchItem和mSearchEditText变量中，以尝试在UI更新后重新打开搜索EditText行，但没有成功：

• .setIconified(false(
• .performClick((
• .exexpandActionView((
• .requestFocus((

我还使用ExecutiorService将Room数据库的ViewModel更新放在后台线程中，然后在后台线程完成后，尝试更新UI并清除主线程上的搜索EditText行。但图标化的搜索图标仍然被返回。

那么我错过了什么？我该如何实现？

MainActivity.java

@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.mainactiv_menu, menu);
searchItem = menu.findItem(R.id.action_search);
menu.findItem(R.id.action_search).setVisible(false);
if (cardsAdapter != null && cardsAdapter.getItemCount() > 0) {
menu.findItem(R.id.action_search).setVisible(true);
}
SearchManager searchManager = (SearchManager)
MainActivity.this.getSystemService(Context.SEARCH_SERVICE);
if (searchItem != null) {
mSearchView = (SearchView) searchItem.getActionView();
mSearchView.setOnQueryTextFocusChangeListener(new SearchViewFocusListener(searchItem));
if (mSearchView != null) {
mSearchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
mSearchEditText = mSearchView.findViewById(androidx.appcompat.R.id.search_src_text);
mSearchEditText.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS);
mSearchEditText.setMaxLines(1);
ImageView closeButton = mSearchView.findViewById(R.id.search_close_btn);
closeButton.setOnClickListener(v -> {
// gets the data from the Room database.
mQuickcardViewModel.loadFullList();  
// reload the database data in to the RecyclerView Adapter.  This destroys 
// the search EditText line for the SearchView and also destroys the "x" close 
//  button and the search icon re-appears. 
cardsAdapter.reloadFullList(mQuickcards);  
// Clear the current search text so the member can enter different search text.
// This is not working as the UI shows the search icon as iconified.
mSearchView.setQuery("",false);
});

mainactiv_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
tools:context=".MainActivity">
<item android:id="@+id/action_search"
android:title="@string/search_title"
android:icon="@drawable/ic_action_search"
app:actionViewClass="androidx.appcompat.widget.SearchView"
android:orderInCategory="1"
app:showAsAction="always|collapseActionView"  />
<item android:id="@+id/action_new"
android:title="@string/action_new"
android:icon="@drawable/ic_action_new"
tools:targetApi="o"
android:tooltipText="Add a quickcard"
android:orderInCategory="2"
app:showAsAction="always"  />

<item android:id="@+id/action_overflow"
android:title="@string/action_overflow"
android:icon="@drawable/ic_action_overflow"
android:orderInCategory="3"
app:showAsAction="always" >
<menu>

<item
android:id="@+id/number_of_cards"
android:title=""
app:showAsAction="always" />
</menu>
</item>
</menu>

Answer 1

代码：主活动.java公共布尔值onCreateOptionsMenu(菜单菜单(｛

getMenuInflater().inflate(R.menu.mainactiv_menu, menu);
searchItem = menu.findItem(R.id.action_search);
menu.findItem(R.id.action_search).setVisible(false);
if (cardsAdapter != null && cardsAdapter.getItemCount() > 0) {
menu.findItem(R.id.action_search).setVisible(true);
}
SearchManager searchManager = (SearchManager)
MainActivity.this.getSystemService(Context.SEARCH_SERVICE);
if (searchItem != null) {
mSearchView = (SearchView) searchItem.getActionView();
mSearchView.setOnQueryTextFocusChangeListener(new SearchViewFocusListener(searchItem));
if (mSearchView != null) {
mSearchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
mSearchEditText = mSearchView.findViewById(androidx.appcompat.R.id.search_src_text);
mSearchEditText.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS);
mSearchEditText.setMaxLines(1);
ImageView closeButton = mSearchView.findViewById(R.id.search_close_btn);
closeButton.setOnClickListener(v -> {
// gets the data from the Room database.
mQuickcardViewModel.loadFullList();  
// reload the database data in to the RecyclerView Adapter.  This destroys 
// the search EditText line for the SearchView and also destroys the "x" close 
//  button and the search icon re-appears. 
cardsAdapter.reloadFullList(mQuickcards);  
// Clear the current search text so the member can enter different search text.
// This is not working as the UI shows the search icon as iconified.
mSearchView.setQuery("",false);
});