blocks|key|2694256|text|目前似乎不支持这一点。一种可能的解决方法是使用您自己的视图，并在展开时隐藏工具栏标题。实现此目的的一种方法是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2694257|https://stackoverflow.com/a/31529101/834692|offset|length|2694258|希望未来版本的Support+Library会增加这一点。|2694259|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|17|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@$D|Q|E|R|1|S]]|A|$]]|$1|F|3|G|5|6|7|T|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|C]]]]

This doesn't seem to be supported at present. A possible workaround is to use your own view and hide the toolbar title when expanded. One approach to do this is here:

<a href="https://stackoverflow.com/a/31529101/834692">https://stackoverflow.com/a/31529101/834692</a>

Hopefully a future version of the Support Library will add this.

blocks|key|130682|text|我是在这个库的帮助下完成的|type|unstyled|depth|inlineStyleRanges|entityRanges|data|130683|https://github.com/opacapp/multiline-collapsingtoolbar|offset|length|130684|将该库添加到项目中，并将CollapsingToolbarLayout替换为net.opacapp.multilinecollapsingtoolbar.CollapsingToolbarLayout|style|CODE|130685|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1I|0|0|C|N|12|1Q|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@$D|S|E|T|1|U]]|A|$]]|$1|F|3|G|5|6|7|V|8|@$D|W|E|X|H|I]|$D|Y|E|Z|H|I]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|C]]]]

I did this with help from this library

<a href="https://github.com/opacapp/multiline-collapsingtoolbar" rel="nofollow noreferrer">https://github.com/opacapp/multiline-collapsingtoolbar</a>

add the library to your project 
and replace the <code>CollapsingToolbarLayout</code> with <code>net.opacapp.multilinecollapsingtoolbar.CollapsingToolbarLayout</code>

blocks|key|129713|text|签出此库multiline-collapsingtoolbar。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|129714|129715|多行折叠工具栏是安卓设计支持库中CollapsingToolbarLayout的替代品，它可以在展开状态下处理多行标题(目前硬编码到最多3行)。折叠工具栏时，标题的较低行将逐渐消失，只剩下最上面的一行可见。|blockquote|129716|129717|129718|作为设计支持库，应兼容API7+(Android+2.1)及以上版本|129719|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/opacapp/multiline-collapsingtoolbar^0|4|R|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|D|3|-4|5|6|7|X|8|@]|9|@]|C|$]]|$1|E|3|F|5|G|7|Y|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|Z|8|@]|9|@]|C|$]]|$1|I|3|-4|5|6|7|10|8|@]|9|@]|C|$]]|$1|J|3|K|5|6|7|11|8|@]|9|@]|C|$]]|$1|L|3|-4|5|6|7|12|8|@]|9|@]|C|$]]]|M|$N|$5|O|P|Q|C|$R|S]]]]

Checkout this library <a href="https://github.com/opacapp/multiline-collapsingtoolbar" rel="nofollow noreferrer">multiline-collapsingtoolbar</a>.

<blockquote>
 multiline-collapsingtoolbar is a replacement for
 CollapsingToolbarLayout from the Android Design Support Library which
 can deal with multiline titles (currently hard-coded to a maximum of 3
 lines) in the expanded state. When collapsing the toolbar, the lower
 lines of the title fade away to leave only the top line visible.
</blockquote>

As the Design Support Library, it should be compatible with API 7 (Android 2.1) and above

blocks|key|130764|text|一种更简单的方法是添加一个添加到CollapsingToolbar的自定义布局并将其固定。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|130765|需要注意的一些注意事项：|130766|130767|工具栏应具有折叠内容的高度，这可以通过代码或在XML中完成。|unordered-list-item|130768|要隐藏的元素必须在布局XML文件中的工具栏定义之前|130769|要保持可见的元素必须在布局XML文件中的工具栏定义之后。|130770|130771|查看完整的代码here。最终结果是：|offset|length|130772|​|130773|📷|atomic|130774|130775|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/JavierSP1209/PinnedToolbar|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/8333214879e28575d686d67abd913d13.gif|imageAlt^0|0|0|0|0|0|0|0|7|4|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1B|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|1D|8|@]|9|@]|A|$]]|$1|H|3|I|5|G|7|1E|8|@]|9|@]|A|$]]|$1|J|3|K|5|G|7|1F|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1H|8|@]|9|@$O|1I|P|1J|1|1K]]|A|$]]|$1|Q|3|R|5|6|7|1L|8|@]|9|@]|A|$]]|$1|S|3|T|5|U|7|1M|8|@]|9|@$O|1N|P|1O|1|1P]]|A|$]]|$1|V|3|R|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1R|8|@]|9|@]|A|$]]]|X|$Y|$5|Z|10|11|A|$12|13]]|14|$5|15|10|16|A|$17|18|19|-4]]]]

A simpler approach would be to add a custom layout added to the CollapsingToolbar and pin it. 

Some of the notes to take care:

<ul>
<li>The the toolbar should have the height of your collapsed content, this can be done by code or at the XML.</li>
<li>The elements you want to hide must be BEFORE the toolbar definition in the layout XML file</li>
<li>The elements you want to remain visible must be AFTER the toolbar definition in the layout XML file.</li>
</ul>

Checkout the full code <a href="https://github.com/JavierSP1209/PinnedToolbar" rel="nofollow noreferrer">here</a>. The final result is:

<a href="https://i.stack.imgur.com/7XY0W.gif" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/7XY0W.gif" alt="Multiline toolbar"></a>

blocks|key|2906571|text|随着新Material+Design+1.2.0-alpha05的发布，此功能被实现为本机函数。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2906572|使用(1.2.0-alpha05)之后的版本实现材料库：|2906573|implementation+'com.google.android.material:material:1.2.0-alpha05'|code-block|syntax|javascript|2906574|将这一行添加到折叠工具栏布局的XML中(本例中我设置了最多2行)|2906575|app:maxLines="2"|2906576|或者，您也可以通过编程方式设置它|2906577|+collapsingtoolbar.setMaxLines(2);|2906578|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

With the release of new Material Design 1.2.0-alpha05 this feature is implemented as a native function.
implement material library with version after(1.2.0-alpha05):
<pre><code>implementation 'com.google.android.material:material:1.2.0-alpha05'
</code></pre>
Add this line to XML of Collapsing Toolbar Layout (this example I set 2 lines as max)
<pre><code>app:maxLines=&quot;2&quot;
</code></pre>
Alternatively you can set it programmatically
<pre><code> collapsingtoolbar.setMaxLines(2);
</code></pre>

My problem is the next. I would use relatively large texts as CollapsingToolbarLayout title so I need to show it as multiline mode. When I try to change text appearance through the <code>setExpandedTitleTextAppearance()</code> method it doesn't work. The code who I used is the next:

<pre><code>&lt;style name="ToolbarExpandedTitle"&gt;
 &lt;item name="android:textSize"&gt;48sp&lt;/item&gt;
 &lt;item name="android:shadowColor"&gt;#ffffff&lt;/item&gt;
 &lt;item name="android:textColor"&gt;@android:color/white&lt;/item&gt;
 &lt;item name="android:singleLine"&gt;false&lt;/item&gt;
 &lt;item name="android:minLines"&gt;3&lt;/item&gt;
 &lt;item name="android:lines"&gt;4&lt;/item&gt;
 &lt;item name="android:maxLines"&gt;5&lt;/item&gt;
&lt;/style&gt;
</code></pre>

<img src="https://i.stack.imgur.com/1rbom.png" alt="enter image description here">

I would like to see the title on multiple lines instead of showing the ellipsis.

How I can multiline the expanded title of CollapsingToolbarLayout?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我的问题是下一个。我会使用相对较大的文本作为CollapsingToolbarLayout标题，所以我需要将其显示为多行模式。当我尝试通过setExpandedTitleTextAppearance()方法更改文本外观时，它不起作用。我使用的代码如下：<style name="ToolbarExpandedTitle"...

问如何对CollapsingToolbarLayout的扩展标题加多行？
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问如何对CollapsingToolbarLayout的扩展标题加多行？
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