<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/ab_search"
    android:orderInCategory="60"
    android:title="action_search"
    app:actionViewClass="android.support.v7.widget.SearchView"
    app:showAsAction="ifRoom"/>
</menu>

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

<searchable xmlns:android="http://schemas.android.com/apk/res/android"
  android:label="@string/app_name"
  android:imeOptions="actionSearch"
  android:hint="姓名" />

 @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.toolbar_menu_friend, menu);
    SearchManager searchManager =
        (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    SearchView searchView =
        (SearchView) menu.findItem(R.id.ab_search).getActionView();
    searchView.setSearchableInfo(
        searchManager.getSearchableInfo(getComponentName()));
    return true;
  }

String SearchContent = getIntent().getStringExtra(SearchManager.QUERY); 

<activity android:name=".activity.MainActivity">
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
      <meta-data android:name="android.app.default_searchable"
        android:value=".activity.SearchResultActivity"/>
    </activity>

-----------------------分割线---------------------------

<activity android:name=".activity.SearchResultActivity"
      android:parentActivityName=".activity.MainActivity">
      <meta-data
        android:name="android.support.PARENT_ACTIVITY"
        android:value=".activity.MainActivity" />
      <!-- meta tag and intent filter go into results activity -->
      <meta-data android:name="android.app.searchable"
        android:resource="@xml/searchable" />
      <intent-filter>
        <action android:name="android.intent.action.SEARCH" />
      </intent-filter>
    </activity>

<meta-data android:name="android.app.searchable" 
android:resource="@xml/searchable" /> 
<intent-filter> 
<action android:name="android.intent.action.SEARCH" /> 
</intent-filter>