entityMap|blocks|key|d26q1|text|通过使用Refelection，您可以设置下拉菜单的高度|type|unstyled|depth|inlineStyleRanges|entityRanges|data|686sn|Spinner+spinner+=+(Spinner)+findViewById(R.id.spinner);
++++try+{
++++++++Field+popup+=+Spinner.class.getDeclaredField("mPopup");
++++++++popup.setAccessible(true);

++++++++//+Get+private+mPopup+member+variable+and+try+cast+to+ListPopupWindow
++++++++android.widget.ListPopupWindow+popupWindow+=+(android.widget.ListPopupWindow)+popup.get(spinner);

++++++++//+Set+popupWindow+height+to+500px
++++++++popupWindow.setHeight(500);
++++}
++++catch+(NoClassDefFoundError+%7C+ClassCastException+%7C+NoSuchFieldException+%7C+IllegalAccessException+e)+{
++++++++//+silently+fail...
++++}|code-block|syntax|javascript|80hmi|如果上面的方法不起作用，那么创建类扩展Spinner类，覆盖android.widget.PopupWindow用于计算的getWindowVisibleDisplayFrame(Rect+outRect)。只需将outRect设置为限制显示下拉视图的区域即可。|offset|length|style|CODE|6v37|@Override
public+void+getWindowVisibleDisplayFrame(Rect+outRect)+{
++++WindowManager+wm+=+(WindowManager)+getContext.getSystemService(Context.WINDOW_SERVICE);
++++Display+d+=+wm.getDefaultDisplay();
++++d.getRectSize(outRect);
++++outRect.set(outRect.left,+<STATUS+BAR+HEIGHT>,+outRect.right,+outRect.bottom);
}|9nt9o^0|0|0|J|7|U|Q|1P|16|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|Q|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|R|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|S|9|@$J|T|K|U|L|M]|$J|V|K|W|L|M]|$J|X|K|Y|L|M]]|A|@]|B|$]]|$2|N|4|O|6|E|8|Z|9|@]|A|@]|B|$F|G]]|$2|P|4|-4|6|7|8|10|9|@]|A|@]|B|$]]]]

By Using Refelection you can set height of dropdown
<pre><code>Spinner spinner = (Spinner) findViewById(R.id.spinner);
 try {
 Field popup = Spinner.class.getDeclaredField(&quot;mPopup&quot;);
 popup.setAccessible(true);

 // Get private mPopup member variable and try cast to ListPopupWindow
 android.widget.ListPopupWindow popupWindow = (android.widget.ListPopupWindow) popup.get(spinner);

 // Set popupWindow height to 500px
 popupWindow.setHeight(500);
 }
 catch (NoClassDefFoundError | ClassCastException | NoSuchFieldException | IllegalAccessException e) {
 // silently fail...
 }
</code></pre>
If above does not work then Create class extend <code>Spinner</code> class overriding its <code>getWindowVisibleDisplayFrame(Rect outRect)</code> which is used by <code>android.widget.PopupWindow</code> for calculations. Just set outRect to limit the area where drop down view can be displayed.
<pre><code>@Override
public void getWindowVisibleDisplayFrame(Rect outRect) {
 WindowManager wm = (WindowManager) getContext.getSystemService(Context.WINDOW_SERVICE);
 Display d = wm.getDefaultDisplay();
 d.getRectSize(outRect);
 outRect.set(outRect.left, &lt;STATUS BAR HEIGHT&gt;, outRect.right, outRect.bottom);
}
</code></pre>

entityMap|0|type|LINK|mutability|MUTABLE|data|url|https://stackoverflow.com/a/29959720/8068914|blocks|key|95vrg|text|检查此answer|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|fa40a|+Spinner+spinner+=+(Spinner)+findViewById(R.id.spinner);
try+{
++++Field+popup+=+Spinner.class.getDeclaredField("mPopup");
++++popup.setAccessible(true);

++++//+Get+private+mPopup+member+variable+and+try+cast+to+ListPopupWindow
++++android.widget.ListPopupWindow+popupWindow+=+(android.widget.ListPopupWindow)+popup.get(spinner);

++++//+Set+popupWindow+height+to+500px
++++popupWindow.setHeight(500);
}
catch+(NoClassDefFoundError+%7C+ClassCastException+%7C+NoSuchFieldException+%7C+IllegalAccessException+e)+{
++++//+silently+fail...
}|code-block|syntax|javascript|166i6^0|3|6|0|0|0^^$0|$1|$2|3|4|5|6|$7|8]]]|9|@$A|B|C|D|2|E|F|Q|G|@]|H|@$I|R|J|S|A|T]]|6|$]]|$A|K|C|L|2|M|F|U|G|@]|H|@]|6|$N|O]]|$A|P|C|-4|2|E|F|V|G|@]|H|@]|6|$]]]]

check this <a href="https://stackoverflow.com/a/29959720/8068914">answer</a>
<pre><code> Spinner spinner = (Spinner) findViewById(R.id.spinner);
try {
 Field popup = Spinner.class.getDeclaredField(&quot;mPopup&quot;);
 popup.setAccessible(true);

 // Get private mPopup member variable and try cast to ListPopupWindow
 android.widget.ListPopupWindow popupWindow = (android.widget.ListPopupWindow) popup.get(spinner);

 // Set popupWindow height to 500px
 popupWindow.setHeight(500);
}
catch (NoClassDefFoundError | ClassCastException | NoSuchFieldException | IllegalAccessException e) {
 // silently fail...
}
</code></pre>

I am using default android spinner in my application. how to reduce the height of drop down as default methods are not working?

How to reduce the height of Drop Down in android?

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。

文章

问答

视频

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

 我在我的应用程序中使用默认的android微调器。当默认方法不起作用时，如何降低下拉列表的高度？ 

问如何降低安卓系统的下拉高度？
EN

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何降低安卓系统的下拉高度？EN