我刚刚实施的 V7 AppCompat 支持库，但 MenuItemCompat.getActionView 总是在每一个Android版本返回null我测试（4.2.2，2.3.4 ....）

在搜索查看显示在操作栏中，但它不响应触摸操作，不扩张，以显示其的EditText 键，就像是一个简单的图标。

  @覆盖
公共布尔onCreateOptionsMenu（功能菜单）{
    MenuInflater充气= getMenuInflater（）;
    inflater.inflate（R.menu.menu，菜单）;

    菜单项searchItem = menu.findItem（R.id.action_search）;
    搜索查看搜索查看=（搜索查看）MenuItemCompat.getActionView（searchItem）;
    如果（搜索查看！= NULL）{
        SearchViewCompat.setOnQueryTextListener（搜索查看，mOnQueryTextListener）;
        sea​​rchView.setIconifiedByDefault（假）;
        Log.d（TAG，搜索查看非空）;
    } 其他
        Log.d（TAG，搜索查看为空）;
    }
    返回super.onCreateOptionsMenu（菜单）;
}
 

menu.xml文件

 ＆LT; XML版本=1.0编码=UTF-8＆GT？;
＆LT;菜单的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
      的xmlns：程序=htt​​p://schemas.android.com/apk/res-auto＆GT;

    ＆LT;项目机器人：ID =@ + ID / ACTION_SEARCH
          应用程序：showAsAction =永远| collapseActionView
          机器人：图标=@可绘制/ abc_ic_search
          机器人：标题=@字符串/ action_bar_search
          机器人：actionViewClass =android.support.v7.widget.SearchView/＆GT;

    ＆LT;项目机器人：ID =@ + ID / action_refresh
          机器人：图标=@可绘制/刷新
          机器人：标题=@字符串/ action_bar_refresh
          应用程序：showAsAction =ifRoom/＆GT;
＆LT; /菜单＆gt;
 

解决方案

最后，我找到了解决办法。

改变 actionViewClass 的命名空间，安卓actionViewClass 到应用程序：actionViewClass

实施 android.support.v7.widget.SearchView.OnQueryTextListener 接口，用于当前的活动。

直接用 setOnQueryTextListener 而不是 SearchViewCompat.setOnQueryTextListener

  @覆盖
公共布尔onCreateOptionsMenu（功能菜单）{
  MenuInflater充气= getMenuInflater（）;
  inflater.inflate（R.menu.menu，菜单）;

  菜单项searchItem = menu.findItem（R.id.action_search）;
  搜索查看搜索查看=（搜索查看）MenuItemCompat.getActionView（searchItem）;
  如果（搜索查看！= NULL）{
     sea​​rchView.setOnQueryTextListener（本）;
  }

  返回super.onCreateOptionsMenu（菜单）;
}
 

I just implemented the v7 AppCompat support library but the MenuItemCompat.getActionView always return null in every Android version I tested (4.2.2, 2.3.4 ....)

The SearchView is displayed in action bar but it doesn't respond to touch actions and doesn't expand to show its EditText and is just like a simple icon.

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.menu, menu);

    MenuItem searchItem = menu.findItem(R.id.action_search);
    SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
    if (searchView != null) {
        SearchViewCompat.setOnQueryTextListener(searchView, mOnQueryTextListener);
        searchView.setIconifiedByDefault(false);
        Log.d(TAG,"SearchView not null");
    } else
        Log.d(TAG, "SearchView is null");
    }
    return super.onCreateOptionsMenu(menu);
}

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">

    <item android:id="@+id/action_search"
          app:showAsAction="always|collapseActionView"
          android:icon="@drawable/abc_ic_search"
          android:title="@string/action_bar_search"
          android:actionViewClass="android.support.v7.widget.SearchView"/>

    <item android:id="@+id/action_refresh"
          android:icon="@drawable/refresh"
          android:title="@string/action_bar_refresh"
          app:showAsAction="ifRoom"/>
</menu>

Finally I found the solution.

Changing namespace of actionViewClass from android:actionViewClass to app:actionViewClass

Implementing android.support.v7.widget.SearchView.OnQueryTextListener interface for current activity.

Directly use setOnQueryTextListener instead of SearchViewCompat.setOnQueryTextListener

@Override
public boolean onCreateOptionsMenu(Menu menu) {
  MenuInflater inflater = getMenuInflater();
  inflater.inflate(R.menu.menu, menu);

  MenuItem searchItem = menu.findItem(R.id.action_search);
  SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
  if (searchView != null) {
     searchView.setOnQueryTextListener(this);
  }

  return super.onCreateOptionsMenu(menu);
}