Android SearchView只需单击两次即可扩展视图

问题描述

简短:当我单击SearchViewIcon时，SearchView不会折叠/展开.

Short: When I click on my SearchViewIcon, the SearchView doesn't collapse/expand.

长:

我正在使用SearchView过滤MainActivity中的Fragment中的RecyclerView.

I"m using a SearchView to filter a RecyclerView in a Fragment that is in my MainActivity.

当我单击SearchViewIcon时(默认情况下SearchView被图标化).我使用以下代码打开带有正确片段的选项卡:

When I click on the SearchViewIcon (SearchView is iconified by default). I open the tab with the correct Fragment with this code:

searchView.setOnSearchClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                viewPager.setCurrentItem(2, false);
            }
        });

具有正确片段的选项卡将按预期方式打开.还显示了文本输入，但SearchView保持图标状态. (请参见下图.)

The Tab with the correct Fragment is opened like expected. Also the text input is shown, but the SearchView stays iconified. (See picture below.)

应用程序

我的XML SearchView:

My SearchView in XML:

<item
    android:id="@+id/action_search"
    android:orderInCategory="1"
    android:icon="@android:drawable/ic_menu_search"
    android:title="@string/menu_item_search_title"
    app:showAsAction="ifRoom"
    app:queryHint="Search name or function"
    app:actionViewClass="android.support.v7.widget.SearchView" />

我已经尝试过的事情:

将我的showAsAction设置为always或ifRoom | collapseActionView

Setting my showAsAction to always or ifRoom|collapseActionView

app:showAsAction="always"
app:showAsAction="ifRoom|collapseActionView"

请求关注我的SearchView:

Request focus on my SearchView:

searchView.requestFocus();

展开我的SearchViewItem:

Expanding my SearchViewItem:

MenuItem searchViewItem = menu.findItem(R.id.action_search);
searchViewItem.expandActionView();

但是这些东西都不起作用...

But non of these things worked...

编辑如标题所示，如果再次单击SearchViewIcon，则SearchView会展开.

EDITLike the title says, if I click the SearchViewIcon again, the SearchView does expand.

推荐答案

我也遇到了类似的问题，并且能够解决它.我需要解决的主要问题是:

I've also encountered a similar problem, and was able to solve it.The main problems I've needed to solve were:

1. searchView默认情况下未展开
2. 直到第二次点击，搜索EditText才成为焦点
3. 即使解决了(2)的问题，键盘也没有出现，直到第二次单击为止.

解决方案:

menu.xml中的
1. 需要将app:showAsAction定义为"collapseActionView" +在Java代码中还需要调用searchView.setIconifiedByDefault(false)进行扩展，以使其优先于图标化(即-按下图标时，展开并单击'不停留在图标模式)
2. 为您的search menu-item object添加一个MenuItem.OnActionExpandListener，并使用处理程序发布可运行内容，该内容将请求焦点到您的search-view object.(为什么可运行?因为不能保证菜单仍未完全膨胀时请求焦点无法正常工作.当在处理程序可运行时请求焦点时，我确保焦点请求在onCreateOptionsMenu()中的所有工作准备就绪后发生完成.
3. 在(2)中定义的可运行的相同位置，也请android OS显示键盘.

1. in menu.xml need to define app:showAsAction as "collapseActionView" + in java code need also to call searchView.setIconifiedByDefault(false) for the expansion to take priority over the iconification (that is - when the icon is pressed, expand and don't stay in icon mode)
2. add a MenuItem.OnActionExpandListener for your search menu-item object and use a handler to post a runnable that will request focus to your search-view object.(why runnable? because requesting focus when the menu is still not fully inflated is not guaranteed to work. When requesting focus in a handler-runnable, I'm making sure the focus request happens AFTER all the work in the onCreateOptionsMenu() is ready and finished.
3. in The same defined runnable from (2), also ask android OS to show the keyboard.

解决所有这些问题的完整代码:

complete code solving all those problems:

    <item
    android:id="@+id/searchContacts"
    android:icon="@drawable/ic_search_white_24dp"
    android:title="search"
    app:showAsAction="collapseActionView|always"
    app:actionViewClass="android.widget.SearchView"
    />
 <!-- and of course your other menu items -->

需要创建这样的xml文件.右键单击您的res文件夹，然后选择new --> android resource file.将您想要的任何内容作为文件名(例如，"searchable"可以正常工作)，然后选择XML作为资源类型.然后复制&将此代码粘贴到创建的文件中(用您自己的提示字符串替换):

Need to create such xml file.right-click your res folder and choose new --> android resource file. put whatever you want as file name ("searchable" will work ok, for example), and choose XML as resource type.Then copy & paste this code in the created file (replace the hint string with your own):

<?xml version="1.0" encoding="utf-8"?>

<searchable xmlns:android="http://schemas.android.com/apk/res/android"
    android:label="@string/app_name"
    android:hint="put here your hint string to be shown"
    />

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        getMenuInflater().inflate(R.menu.menu, menu);
        implementSearch(menu);
        return true;
    }

    private void implementSearch(final Menu menu) {
        SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
        final MenuItem searchMenuItem = menu.findItem(R.id.searchContacts);
        final SearchView searchView = (SearchView) searchMenuItem.getActionView();
        searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
        searchView.setIconifiedByDefault(false);

        searchMenuItem.setOnActionExpandListener(new MenuItem.OnActionExpandListener(){
            @Override
            public boolean onMenuItemActionExpand(MenuItem item){
                // the search view is now open. add your logic if you want
                new Handler().post(new Runnable() {
                    @Override
                    public void run() {
                        searchView.requestFocus();
                        InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                        if (imm != null) { // it's never null. I've added this line just to make the compiler happy
                            imm.showSoftInput(searchView.findFocus(), 0);
                        }


                    }
                });
                return true;
            }


            @Override
            public boolean onMenuItemActionCollapse(MenuItem item){
                // the search view is closing. add your logic if you want
                return true;
            }

        });

    }

此外，如果您想使用自己的回调进行搜索的文本更改和提交(而不是Android的意图)，请在implementSearch()方法中，添加对searchMenuItem.setOnActionExpandListener(new SearchView.OnQueryTextListener({...}))的调用.

Also, if you want to use your own callbacks for the search's text change and submitted (instead of Android intents), in the implementSearch() method add a call to searchMenuItem.setOnActionExpandListener(new SearchView.OnQueryTextListener({...})).

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