Question

I get the Exception:

java.lang.IllegalStateException: ScrollView can host only one direct child

This is my layout:

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/frame"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/bg_listgrey"
    android:scrollbars="none" >

    <RelativeLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="@color/bg_listgrey" >

        <RelativeLayout
            xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:tools="http://schemas.android.com/tools"
            android:id="@+id/rl1">

            <ImageView
               />

            <TextView
                />

            <TextView
               />

            <TextView
                />
        </RelativeLayout>

        <RelativeLayout
            xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:tools="http://schemas.android.com/tools"
            android:id="@+id/rl2"" >

            <ImageView
                 />

            <TextView
                 />
        </RelativeLayout>
    </RelativeLayout>

</ScrollView>

The same layout worked fine in case of an Activity. Where as it gives the exception when using in a Fragment.

MainActivity:

FragmentTransaction t = this.getSupportFragmentManager()
        .beginTransaction();
t.add(R.id.frame, new mFragment());
t.commit();

Thank you

EDIT:

Bit if i wrap this ScrollView in a FragmeLayout, it works fine.

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/frame"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/bg_listgrey" >

    <ScrollView
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:scrollbars="none" >
.......
.......
.......
</ScrollView>
</FramLayout>

Answer 1

The same layout worked fine in case of an Activity. Where as it gives
the exception when using in a Fragment.

The layout will work just fine as the content view for an Activity(but try to add another view to the ScrollView and see how it goes;) ) and it will work as well for a Fragment, you just don’t use it well. This:

t.add(R.id.frame, new mFragment());

will add the Fragment's view(the one created in onCreate) to the ScrollView(the ScrollView has the id R.id.frame), meaning that you’ll have two views in the ScrollView(which is not allowed): the RelativeLayout and the root of the Fragment‘s view. The addView methods of the ScrollView class will check to enforce that you end up with a single child in the ScrollView.

Bit if i wrap this ScrollView in a FragmeLayout, it works fine.

This is normal as you add the Fragment‘s view to the parent FrameLayout and not to the ScrollView.