Scrollview can host only one direct child ошибка

I have multiple LinearLayouts with a combined height that easily exceeds a device’s screen height. So in order to make my layout scrollable, I tried adding in a ScrollView, but unfortunately I get the following error:

Scrollview can host only one direct child

I did some research, but couldn’t really make sense of how to solve it, even after reading a couple of solutions. I tried a few changes, but nothing worked for me so far. Any help?

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

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

    <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:paddingTop="20dip">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 1"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q1_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
<LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 2"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q2_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
<LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 3"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q3_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
<LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 4"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q4_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
<LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 5"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q5_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
    <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 6"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q6_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>        <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 7"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q7_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
        <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 8"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q8_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
        <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 9"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q9_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
        <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 10"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q10_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
        <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 11"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q11_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
        <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 12"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q12_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
        <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 13"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q13_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
        <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 14"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q14_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
        <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 15"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q15_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
        <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 16"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q16_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
        <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 17"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q17_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
        <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 18"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q18_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
        <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 19"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q19_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>
</LinearLayout>
        <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Question 20"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/q20_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text=""
        android:gravity="center"/>

<LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Score:"
        android:paddingBottom="20dip"
        android:gravity="center" />
    <TextView
        android:id="@+id/final_score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="0/5"
        android:gravity="center"/>
</LinearLayout>
    </LinearLayout>
        </ScrollView>

Skip to content

<ScrollView
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">

<TextView
android:id="@+id/brand"
android:text="@string/brand"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<EditText
android:id="@+id/edxbrand"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>

</ScrollView>

edit (2nd answer):

I’ve been playing with the code and I’m still not sure WHY this happens, definitely there’s something wrong on the fragment manager when it swapping fragments (replace(resId, fragment))

In my fragment onCreateView was this code:

    View view = inflater.inflate(R.layout.post_fragment, null, false);
    if (item == null)
        return view;

    return BuildView(view);

post_fragment is an empty canvas with 1 ScrollView, 1 LinearLayout inside it, and some other ViewGroups inside it. This is to load an empty canvas on the 1st load (item is null) and on the 2nd time, through a user input, it would get the actual data to show.

for some reason beyond my knowledge, as seen in the logcat, FragmentManagerImpl.moveToState was calling ScrollView.AddChild causing the error.

Now I changed my fragments onCreateView to:

    if (item == null)
        return inflater.inflate(R.layout.empty, null, false);

    View view = inflater.inflate(R.layout.post_fragment, null, false);
    return BuildView(view);

so that the ’empty’ canvas is a FrameLayout with nothing on it, and now everything is working happily.
I’m sure this sounds like some odd error on the actual fragments framework, but it’s a work around it.

1st answer:

Raptrex, as far as I can see. Yes, that table layout is the only child your scrowview have. I am having the exactly the same problem, and very frustrated trying to solve it.

From the LogCat/Debug, it seems that there’s something in the Fragments manager that is calling and .AddView(view) in my ScrollView (check the log) it depends on how I change my XML layout I get this error or not, which let’s say sounds pretty absurd!

Any ideas of how?why?what? I’m listening…

FATAL EXCEPTION: main
java.lang.IllegalStateException: ScrollView can host only one direct child
at android.widget.ScrollView.addView(ScrollView.java:219)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:787)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:977)
at android.app.BackStackRecord.run(BackStackRecord.java:638)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1309)
at android.app.FragmentManagerImpl$1.run(FragmentManager.java:398)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:132)
at android.app.ActivityThread.main(ActivityThread.java:4123)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:491)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
at dalvik.system.NativeStart.main(Native Method)

edit (2nd answer):

I’ve been playing with the code and I’m still not sure WHY this happens, definitely there’s something wrong on the fragment manager when it swapping fragments (replace(resId, fragment))

In my fragment onCreateView was this code:

    View view = inflater.inflate(R.layout.post_fragment, null, false);
    if (item == null)
        return view;

    return BuildView(view);

post_fragment is an empty canvas with 1 ScrollView, 1 LinearLayout inside it, and some other ViewGroups inside it. This is to load an empty canvas on the 1st load (item is null) and on the 2nd time, through a user input, it would get the actual data to show.

for some reason beyond my knowledge, as seen in the logcat, FragmentManagerImpl.moveToState was calling ScrollView.AddChild causing the error.

Now I changed my fragments onCreateView to:

    if (item == null)
        return inflater.inflate(R.layout.empty, null, false);

    View view = inflater.inflate(R.layout.post_fragment, null, false);
    return BuildView(view);

so that the ’empty’ canvas is a FrameLayout with nothing on it, and now everything is working happily.
I’m sure this sounds like some odd error on the actual fragments framework, but it’s a work around it.

1st answer:

Raptrex, as far as I can see. Yes, that table layout is the only child your scrowview have. I am having the exactly the same problem, and very frustrated trying to solve it.

From the LogCat/Debug, it seems that there’s something in the Fragments manager that is calling and .AddView(view) in my ScrollView (check the log) it depends on how I change my XML layout I get this error or not, which let’s say sounds pretty absurd!

Any ideas of how?why?what? I’m listening…

FATAL EXCEPTION: main
java.lang.IllegalStateException: ScrollView can host only one direct child
at android.widget.ScrollView.addView(ScrollView.java:219)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:787)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:977)
at android.app.BackStackRecord.run(BackStackRecord.java:638)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1309)
at android.app.FragmentManagerImpl$1.run(FragmentManager.java:398)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:132)
at android.app.ActivityThread.main(ActivityThread.java:4123)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:491)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
at dalvik.system.NativeStart.main(Native Method)

изменить (2-й ответ):

Я играл с кодом и все еще не уверен, ПОЧЕМУ это происходит, определенно что-то не так с диспетчером фрагментов, когда он меняет местами фрагменты (replace (resId, fragment))

В моем фрагменте onCreateView был такой код:

    View view = inflater.inflate(R.layout.post_fragment, null, false);
    if (item == null)
        return view;

    return BuildView(view);

post_fragment — это пустой холст с 1 ScrollView, 1 LinearLayout внутри и некоторыми другими ViewGroup внутри него. Это необходимо для загрузки пустого холста при первой загрузке (элемент равен нулю), а во второй раз, через пользовательский ввод, он получит фактические данные для отображения.

по какой-то незнакомой мне причине, как видно из logcat, FragmentManagerImpl.moveToState вызывал ScrollView.AddChild, вызывая ошибку.

Теперь я изменил свои фрагменты onCreateView на:

    if (item == null)
        return inflater.inflate(R.layout.empty, null, false);

    View view = inflater.inflate(R.layout.post_fragment, null, false);
    return BuildView(view);

так что «пустой» холст представляет собой FrameLayout, на котором ничего нет, и теперь все работает нормально. Я уверен, что это звучит как какая-то странная ошибка в реальной структуре фрагментов, но это обходной путь.

1-й ответ:

Насколько я понимаю, раптрекс. Да, этот макет стола — единственный дочерний элемент вашего обзора. У меня точно такая же проблема, и я очень расстроен, пытаясь ее решить.

Из LogCat / Debug кажется, что в диспетчере фрагментов есть что-то, что вызывает, и .AddView (view) в моем ScrollView (проверьте журнал), это зависит от того, как я меняю свой XML-макет, получаю эту ошибку или нет, что давайте сказать звучит довольно абсурдно!

Любые идеи о том, как? Почему? Что? Я слушаю…

FATAL EXCEPTION: main
java.lang.IllegalStateException: ScrollView can host only one direct child
at android.widget.ScrollView.addView(ScrollView.java:219)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:787)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:977)
at android.app.BackStackRecord.run(BackStackRecord.java:638)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1309)
at android.app.FragmentManagerImpl$1.run(FragmentManager.java:398)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:132)
at android.app.ActivityThread.main(ActivityThread.java:4123)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:491)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
at dalvik.system.NativeStart.main(Native Method)