如何在android中处理Search View的后退按钮

Question

我已经开发了一个在操作栏中有搜索视图的应用程序,当我完全搜索其过滤器时我遇到问题但是当我按下按钮时它仍然显示过滤器数据所以我的问题是什么是Action Bar Search的后退按钮事件视图.？

我的搜索视图代码是

SearchView searchView = (SearchView) MenuItemCompat.getActionView(menu.findItem(Menus.SEARCH));
    searchView.setQueryHint(this.getString(R.string.search));
    editSearch = (EditText) searchView.findViewById(android.support.v7.appcompat.R.id.search_src_text);
    editSearch.setHintTextColor(getResources().getColor(R.color.white));
    searchView.setOnQueryTextListener(OnQuerySearchView);


 private OnQueryTextListener OnQuerySearchView = new OnQueryTextListener() {

    @Override
    public boolean onQueryTextSubmit(String newText) {
        if (TextUtils.isEmpty(newText)) {
            listAllContact.clearTextFilter();
        } else {
            listAllContact.setFilterText(newText.toString());
        }
        return true;
    }

    @Override
    public boolean onQueryTextChange(String newText) {
        String text = editSearch.getText().toString()
                .toLowerCase(Locale.getDefault());
        adapter.filter(text);
        return true;
    }

};

适配器中的过滤方法

public void filter(String charText) {
    charText = charText.toLowerCase(Locale.getDefault());
    propertyList.clear();

    if (charText.length() == 0) {
       propertyList.addAll(arrayList);
    notifyDataSetChanged();

    } else {
        for (ContactProperty p : arrayList) {
            if (p.getFriendName().toLowerCase(Locale.getDefault())
                    .contains(charText)) {
                propertyList.add(p);
            }
        }
        notifyDataSetChanged();

    }

Answer 1

您可以为此添加侦听器:

MenuItem searchMenuItem = menu.findItem(R.id.menu_search);
    searchMenuItem.setOnActionExpandListener(new MenuItem.OnActionExpandListener() {

        @Override
        public boolean onMenuItemActionExpand(MenuItem item) {
            // Do whatever you need
            return true; // KEEP IT TO TRUE OR IT DOESN'T OPEN !!
        }

        @Override
        public boolean onMenuItemActionCollapse(MenuItem item) {
            // Do whatever you need
            return true; // OR FALSE IF YOU DIDN'T WANT IT TO CLOSE!
        }
    });

Answer 2

您只需要在菜单布局中放置"collapseActionView"属性

<menu xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:id="@+id/menu_item_search"
        android:title="@string/search"
        android:iconifiedByDefault="true"
        android:icon="@drawable/ic_action_search" 
        app:actionViewClass="android.support.v7.widget.SearchView"
        app:showAsAction="ifRoom|collapseActionView"/> <--this one
</menu>

这将为您提供您自己寻找的功能.

Answer 3

当焦点丢失时，这将折叠搜索操作项：

@Override
public boolean onCreateOptionsMenu(Menu menu)
{
    getMenuInflater().inflate(R.menu.main_menu, menu);
    searchItem = menu.findItem(R.id.action_search);
    searchView = (SearchView) MenuItemCompat.getActionView(searchItem);

    // be sure to use 'setOnQueryTextFocusChangeListener()'
    searchView.setOnQueryTextFocusChangeListener(new View.OnFocusChangeListener()
    {
        @Override
        public void onFocusChange(View v, boolean newViewFocus)
        {
            if (!newViewFocus)
            {
                //Collapse the action item.
                searchItem.collapseActionView();
                //Clear the filter/search query.
                myFilterFunction("");
            }
        }
    });

    return super.onCreateOptionsMenu(menu);
}

这是我发现点击后退按钮时成功折叠搜索项操作视图的唯一方法。