我使用AppCompat v21库在我的应用中使用Toolbar作为操作栏，如Android开发人员博客上的this post所述。我使用ThemeOverlay.AppCompat.Dark.ActionBar主题设置了操作栏的样式，以便文字很轻。但是，我想让Action Bar SearchView的搜索建议弹出窗口在浅色背景上显示深色文字，而且我无法达到此效果。
这是我的操作栏Toolbar的XML：
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/toolbar_actionbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:elevation="@dimen/action_bar_elevation"
app:theme="@style/ActionBarThemeOverlay"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>
我尝试将动作栏主题叠加层扩展为SearchView：
<style name="ActionBarThemeOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar">
<item name="searchViewStyle">@style/Widget.AppCompat.Light.SearchView</item>
</style>
我已经将这个相同的元素添加到我的主题中以获得良好的衡量标准：
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="searchViewStyle">@style/Widget.AppCompat.Light.SearchView</item>
</style>
但searchViewStyle元素似乎没有任何效果。我如何在这里设置SearchView的样式？
答案 0 :(得分：43)
根据AppCompat v21 announcement blog post：
AppCompat提供了Lollipop更新的SearchView API，它更具可定制性和可定制性（排队掌声）。我们现在使用Lollipop样式结构而不是旧的searchView *主题属性。
以下是SearchView的样式（在values/themes.xml中）：
<style name="Theme.MyTheme" parent="Theme.AppCompat">
<item name="searchViewStyle">@style/MySearchViewStyle</item>
</style>
<style name="MySearchViewStyle" parent="Widget.AppCompat.SearchView">
<!-- Background for the search query section (e.g. EditText) -->
<item name="queryBackground">...</item>
<!-- Background for the actions section (e.g. voice, submit) -->
<item name="submitBackground">...</item>
<!-- Close button icon -->
<item name="closeIcon">...</item>
<!-- Search button icon -->
<item name="searchIcon">...</item>
<!-- Go/commit button icon -->
<item name="goIcon">...</item>
<!-- Voice search button icon -->
<item name="voiceIcon">...</item>
<!-- Commit icon shown in the query suggestion row -->
<item name="commitIcon">...</item>
<!-- Layout for query suggestion rows -->
<item name="suggestionRowLayout">...</item>
</style>
正如this blog post进一步研究。
答案 1 :(得分：10)
在深入研究源代码并进行一些实验后，我想出了一个解决方案，并清除了几个混乱的来源。首先，需要在应用主题中设置SearchView样式：
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="searchViewStyle">@style/MySearchViewStyle</item>
</style>
然后我们需要在suggestionRowLayout：
searchViewStyle
<style name="MySearchViewStyle" parent="Widget.AppCompat.Light.SearchView">
<item name="suggestionRowLayout">@layout/search_suggestion_row</item>
</style>
在我的问题中，我假设我们可以使用@style/Widget.AppCompat.Light.SearchView来获得一个轻量级的建议菜单，但结果却并非如此;我们需要定义自己的布局。我是从AppCompat v21库abc_search_dropdown_item_icons_2line.xml开始的。
答案 2 :(得分：1)
以下是search_suggestion_row.xml的示例
<?xml version="1.0" encoding="utf-8"?>
<!--
/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
-->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="58dip"
style="@style/RtlOverlay.Widget.AppCompat.Search.DropDown">
<!-- Icons come first in the layout, since their placement doesn't depend on
the placement of the text views. -->
<android.support.v7.internal.widget.TintImageView
android:id="@android:id/icon1"
android:layout_width="@dimen/abc_dropdownitem_icon_width"
android:layout_height="48dip"
android:scaleType="centerInside"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:visibility="invisible"
style="@style/RtlOverlay.Widget.AppCompat.Search.DropDown.Icon1" />
<android.support.v7.internal.widget.TintImageView
android:id="@+id/edit_query"
android:layout_width="48dip"
android:layout_height="48dip"
android:scaleType="centerInside"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:background="?attr/selectableItemBackground"
android:visibility="gone"
style="@style/RtlOverlay.Widget.AppCompat.Search.DropDown.Query" />
<android.support.v7.internal.widget.TintImageView
android:id="@id/android:icon2"
android:layout_width="48dip"
android:layout_height="48dip"
android:scaleType="centerInside"
android:layout_alignWithParentIfMissing="true"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:visibility="gone"
style="@style/RtlOverlay.Widget.AppCompat.Search.DropDown.Icon2" />
<!-- The subtitle comes before the title, since the height of the title depends on whether the
subtitle is visible or gone. -->
<TextView android:id="@android:id/text2"
style="?android:attr/dropDownItemStyle"
android:textAppearance="?attr/textAppearanceSearchResultSubtitle"
android:singleLine="true"
android:layout_width="match_parent"
android:layout_height="29dip"
android:paddingBottom="4dip"
android:gravity="top"
android:layout_alignWithParentIfMissing="true"
android:layout_alignParentBottom="true"
android:visibility="gone" />
<!-- The title is placed above the subtitle, if there is one. If there is no
subtitle, it fills the parent. -->
<TextView android:id="@android:id/text1"
style="?android:attr/dropDownItemStyle"
android:textAppearance="?attr/textAppearanceSearchResultTitle"
android:singleLine="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_above="@android:id/text2" />
</RelativeLayout>
<!-- From: file:/usr/local/google/buildbot/repo_clients/https___googleplex-android.googlesource.com_a_platform_manifest.git/lmp-mr1-supportlib-release/frameworks/support/v7/appcompat/res/layout/abc_search_dropdown_item_icons_2line.xml -->
答案 3 :(得分：0)
如果不起作用，则可以为其编写代码。我在这篇文章中解释。它适用于xamarin形式，但我希望您可以将其应用于andoird native。您可以更改背景，图标，清除图标以及颜色
How to change searchbar cancel button image in xamarin forms