java.lang.IllegalStateException：滚动型只能承载一个直接子 [英] java.lang.IllegalStateException: ScrollView can host only one direct child

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问题描述

我只是试图但是每次我尝试加载的布局，我得到一个错误，指出java.lang.IllegalStateException增加一个滚动视图添加到滚动此布局的能力：滚动型只能承载一个直接孩子，我不确定为什么。

任何建议都多少AP preciated。

来源：

 ＆LT; XML版本=1.0编码=UTF-8＆GT？;
＆LT; LinearLayout中的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
    机器人：layout_width =FILL_PARENT
    机器人：layout_height =WRAP_CONTENT
    机器人：layout_weight =1
    机器人：方向=垂直＆GT;

    ＆LT; RelativeLayout的＆GT;

        ＆LT;查看
            机器人：layout_width =1DP
            机器人：layout_height =5DP＆GT;
        ＆LT; /视图＆gt;

        ＆LT;滚动型
            机器人：layout_width =FILL_PARENT
            机器人：layout_height =WRAP_CONTENT
            机器人：layout_weight =1＆GT;

            ＆LT; com.google.android.youtube.player.YouTubePlayerView
                机器人：ID =@ + ID / youtubeplayerview
                机器人：layout_width =FILL_PARENT
                机器人：layout_height =WRAP_CONTENT/＆GT;

            ＆LT;查看
                机器人：layout_width =1DP
                机器人：layout_height =5DP＆GT;
            ＆LT; /视图＆gt;

            ＆LT;的TextView
                机器人：ID =@ + ID / textView1a
                机器人：layout_width =WRAP_CONTENT
                机器人：layout_height =WRAP_CONTENT
                机器人：文本=艾萨克丹尼尔在CNN的安德森·库珀
                机器人：textAppearance =机器人：ATTR / textAppearanceMedium/＆GT;

            ＆LT;的TextView
                机器人：ID =@ + ID / textView2a
                机器人：layout_width =WRAP_CONTENT
                机器人：layout_height =WRAP_CONTENT
                机器人：文本=由idconex
                机器人：textAppearance =：/＆gt;中的Andr​​oid ATTR / textAppearanceSmall？

            ＆LT;的TextView
                机器人：ID =@ + ID / textView3a
                机器人：layout_width =WRAP_CONTENT
                机器人：layout_height =WRAP_CONTENT
                机器人：文本=6.75亿的意见
                机器人：textAppearance =：/＆gt;中的Andr​​oid ATTR / textAppearanceSmall？

            ＆LT; com.google.android.youtube.player.YouTubePlayerView
                机器人：ID =@ + ID / youtubeplayerview2
                机器人：layout_width =FILL_PARENT
                机器人：layout_height =WRAP_CONTENT/＆GT;

            ＆LT;的TextView
                机器人：ID =@ + ID / textView1b
                机器人：layout_width =WRAP_CONTENT
                机器人：layout_height =WRAP_CONTENT
                机器人：文本=愤怒反对机器 - 巡游公牛
                机器人：textAppearance =机器人：ATTR / textAppearanceMedium/＆GT;

            ＆LT;的TextView
                机器人：ID =@ + ID / textView2b
                机器人：layout_width =WRAP_CONTENT
                机器人：layout_height =WRAP_CONTENT
                机器人：文本=由RATMVEVO
                机器人：textAppearance =：/＆gt;中的Andr​​oid ATTR / textAppearanceSmall？

            ＆LT;的TextView
                机器人：ID =@ + ID / textView3b
                机器人：layout_width =WRAP_CONTENT
                机器人：layout_height =WRAP_CONTENT
                机器人：文本=1195601意见
                机器人：textAppearance =：/＆gt;中的Andr​​oid ATTR / textAppearanceSmall？
        ＆LT; /滚动型＆GT;
    ＆LT; / RelativeLayout的＆GT;

＆LT; / LinearLayout中＆GT;

编辑（响应codeMagic的答案）

 ＆LT; XML版本=1.0编码=UTF-8＆GT？;
＆LT; LinearLayout中的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
    机器人：layout_width =FILL_PARENT
    机器人：layout_height =WRAP_CONTENT
    机器人：layout_weight =1
    机器人：方向=垂直＆GT;


＆LT;滚动型
        机器人：layout_width =FILL_PARENT
        机器人：layout_height =WRAP_CONTENT
        机器人：layout_weight =1＆GT;
      ＆LT; LinearLayout中的android：layout_width =match_parent
                    机器人：layout_height =WRAP_CONTENT＆GT;



            ＆LT; com.google.android.youtube.player.YouTubePlayerView
                机器人：ID =@ + ID / youtubeplayerview
                机器人：layout_width =FILL_PARENT
                机器人：layout_height =WRAP_CONTENT/＆GT;

            ＆LT;查看
                机器人：layout_width =1DP
                机器人：layout_height =5DP＆GT;
            ＆LT; /视图＆gt;

            ＆LT;的TextView
                机器人：ID =@ + ID / textView1a
                机器人：layout_width =WRAP_CONTENT
                机器人：layout_height =WRAP_CONTENT
                机器人：文本=艾萨克丹尼尔在CNN的安德森·库珀
                机器人：textAppearance =机器人：ATTR / textAppearanceMedium/＆GT;

            ＆LT;的TextView
                机器人：ID =@ + ID / textView2a
                机器人：layout_width =WRAP_CONTENT
                机器人：layout_height =WRAP_CONTENT
                机器人：文本=由idconex
                机器人：textAppearance =：/＆gt;中的Andr​​oid ATTR / textAppearanceSmall？

            ＆LT;的TextView
                机器人：ID =@ + ID / textView3a
                机器人：layout_width =WRAP_CONTENT
                机器人：layout_height =WRAP_CONTENT
                机器人：文本=6.75亿的意见
                机器人：textAppearance =：/＆gt;中的Andr​​oid ATTR / textAppearanceSmall？

            ＆LT; com.google.android.youtube.player.YouTubePlayerView
                机器人：ID =@ + ID / youtubeplayerview2
                机器人：layout_width =FILL_PARENT
                机器人：layout_height =WRAP_CONTENT/＆GT;

            ＆LT;的TextView
                机器人：ID =@ + ID / textView1b
                机器人：layout_width =WRAP_CONTENT
                机器人：layout_height =WRAP_CONTENT
                机器人：文本=愤怒反对机器 - 巡游公牛
                机器人：textAppearance =机器人：ATTR / textAppearanceMedium/＆GT;

            ＆LT;的TextView
                机器人：ID =@ + ID / textView2b
                机器人：layout_width =WRAP_CONTENT
                机器人：layout_height =WRAP_CONTENT
                机器人：文本=由RATMVEVO
                机器人：textAppearance =：/＆gt;中的Andr​​oid ATTR / textAppearanceSmall？

            ＆LT;的TextView
                机器人：ID =@ + ID / textView3b
                机器人：layout_width =WRAP_CONTENT
                机器人：layout_height =WRAP_CONTENT
                机器人：文本=1195601意见
                机器人：textAppearance =：/＆gt;中的Andr​​oid ATTR / textAppearanceSmall？

         ＆LT; / LinearLayout中＆GT;

解决方案

正如错误说：

 滚动型只能承载一个直接子

裹在查看 S内部的的LinearLayout ，以便滚动型只具有的LinearLayout 作为直接孩子。

从文档

  

一个滚动型是一个的FrameLayout，这意味着你应该把一个孩子它包含的全部内容，以滚动;这个孩子本身可能是使用对象的层次复杂的布局管理器。经常被使用的儿童是一个的LinearLayout在垂直方向上，presenting的顶级项目一个垂直阵列，该用户可以滚动通过

 ＆LT;滚动型
        机器人：layout_width =FILL_PARENT
        机器人：layout_height =WRAP_CONTENT
        机器人：layout_weight =1＆GT;
      ＆LT; LinearLayout中的android：layout_width =match_parent
                    机器人：layout_height =WRAP_CONTENT
                    机器人：方向=垂直＆GT;
           //在你的滚动型的当前看法
     ＆LT; / LinearLayout中＆GT;
＆LT; /滚动型＆GT;

I'm simply trying to add the ability to scroll through this layout by adding a scrollview however every time I attempt to load the layout I'm getting an error stating "java.lang.IllegalStateException: ScrollView can host only one direct child" and I'm unsure why.

Any suggestions are much appreciated.

SOURCE:

<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:orientation="vertical" >

    <RelativeLayout>

        <View
            android:layout_width="1dp"
            android:layout_height="5dp" >
        </View>

        <ScrollView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1" >

            <com.google.android.youtube.player.YouTubePlayerView
                android:id="@+id/youtubeplayerview"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content" />

            <View
                android:layout_width="1dp"
                android:layout_height="5dp" >
            </View>

            <TextView
                android:id="@+id/textView1a"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Isaac Daniel at CNN Anderson Cooper"
                android:textAppearance="?android:attr/textAppearanceMedium" />

            <TextView
                android:id="@+id/textView2a"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="by idconex"
                android:textAppearance="?android:attr/textAppearanceSmall" />

            <TextView
                android:id="@+id/textView3a"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="675,000,000 views"
                android:textAppearance="?android:attr/textAppearanceSmall" />

            <com.google.android.youtube.player.YouTubePlayerView
                android:id="@+id/youtubeplayerview2"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content" />

            <TextView
                android:id="@+id/textView1b"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Rage Against The Machine - Bulls on Parade"
                android:textAppearance="?android:attr/textAppearanceMedium" />

            <TextView
                android:id="@+id/textView2b"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="by RATMVEVO"
                android:textAppearance="?android:attr/textAppearanceSmall" />

            <TextView
                android:id="@+id/textView3b"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="1,195,601 views"
                android:textAppearance="?android:attr/textAppearanceSmall" />
        </ScrollView>
    </RelativeLayout>

</LinearLayout>

EDIT (In response to CodeMagic's answer)

<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:orientation="vertical" >


<ScrollView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1" >
      <LinearLayout android:layout_width="match_parent"
                    android:layout_height="wrap_content">



            <com.google.android.youtube.player.YouTubePlayerView
                android:id="@+id/youtubeplayerview"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content" />

            <View
                android:layout_width="1dp"
                android:layout_height="5dp" >
            </View>

            <TextView
                android:id="@+id/textView1a"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Isaac Daniel at CNN Anderson Cooper"
                android:textAppearance="?android:attr/textAppearanceMedium" />

            <TextView
                android:id="@+id/textView2a"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="by idconex"
                android:textAppearance="?android:attr/textAppearanceSmall" />

            <TextView
                android:id="@+id/textView3a"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="675,000,000 views"
                android:textAppearance="?android:attr/textAppearanceSmall" />

            <com.google.android.youtube.player.YouTubePlayerView
                android:id="@+id/youtubeplayerview2"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content" />

            <TextView
                android:id="@+id/textView1b"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Rage Against The Machine - Bulls on Parade"
                android:textAppearance="?android:attr/textAppearanceMedium" />

            <TextView
                android:id="@+id/textView2b"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="by RATMVEVO"
                android:textAppearance="?android:attr/textAppearanceSmall" />

            <TextView
                android:id="@+id/textView3b"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="1,195,601 views"
                android:textAppearance="?android:attr/textAppearanceSmall" />

         </LinearLayout>

解决方案

Just as the error says

ScrollView can host only one direct child

Wrap the Views inside of a LinearLayout so the ScrollView has only the LinearLayout as a direct child.

From the Docs

A ScrollView is a FrameLayout, meaning you should place one child in it containing the entire contents to scroll; this child may itself be a layout manager with a complex hierarchy of objects. A child that is often used is a LinearLayout in a vertical orientation, presenting a vertical array of top-level items that the user can scroll through.

<ScrollView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1" >
      <LinearLayout android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">
           // all the views currently in your ScrollView
     </LinearLayout>
</ScrollView>

这篇关于java.lang.IllegalStateException：滚动型只能承载一个直接子的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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