ScrollView auto scrolls to selectable TextView

Question

I have a vertical LinearLayout inside a ScrollView. Everything was ok till setting the third TextView in LinearLayout selectable.

After this change it auto scrolls to the third TextView.

What can cause the problem?

Before and after the change:

the layout

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/roota_view"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_gravity="right"
    android:orientation="vertical" >

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin"
        tools:context="com.saliherikci.poemnotebook.ReadPoemActivity$PlaceholderFragment" >

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:focusable="false"
            android:focusableInTouchMode="false"
            android:orientation="vertical" >

            <TextView
                android:id="@+id/poemTitleTextView"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:text="Çanakkale Şehitlerine"
                android:textColor="@color/poem_title"
                android:textSize="24dp" />

            <TextView
                android:id="@+id/poemAuthorTextView"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="5dp"
                android:text="Mehmet Akif ERSOY"
                android:textAppearance="?android:attr/textAppearanceSmall"
                android:textSize="11dp" />

            <TextView
                android:id="@+id/poemContentTextView"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:text="Şu Boğaz harbi nedir? Var mı ki dünyâda eşi? "
                android:textColor="@color/poem_content"
                android:textIsSelectable="true"
                android:textSize="10dp" />
        </LinearLayout>
    </ScrollView>

    <LinearLayout
        android:id="@+id/fontSizeView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="top|right"
        android:background="@color/font_size_background"
        android:orientation="vertical"
        android:paddingBottom="5dp"
        android:paddingLeft="15dp"
        android:paddingRight="15dp"
        android:paddingTop="5dp"
        android:visibility="invisible" >

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="top|right"
            android:text="YAZI BOYUTU"
            android:textAppearance="?android:attr/textAppearanceSmall"
            android:textColor="#1a1a1a"
            android:textSize="8dp" />

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="top|right"
            android:layout_marginTop="5dp"
            android:dividerPadding="5dp"
            android:orientation="horizontal"
            android:showDividers="middle" >

            <ImageButton
                android:id="@+id/font_size_1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom"
                android:background="@null"
                android:src="@drawable/ic_font_size_black_1_active" />

            <ImageButton
                android:id="@+id/font_size_2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom"
                android:layout_marginLeft="20dp"
                android:background="@null"
                android:src="@drawable/ic_font_size_black_2_inactive" />

            <ImageButton
                android:id="@+id/font_size_3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom"
                android:layout_marginLeft="20dp"
                android:background="@null"
                android:src="@drawable/ic_font_size_black_3_inactive" />

            <ImageButton
                android:id="@+id/font_size_4"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom"
                android:layout_marginLeft="20dp"
                android:background="@null"
                android:src="@drawable/ic_font_size_black_4_inactive" />

            <ImageButton
                android:id="@+id/font_size_5"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="20dp"
                android:background="@null"
                android:src="@drawable/ic_font_size_black_5_inactive" />
        </LinearLayout>
    </LinearLayout>

</FrameLayout>

Answer 1

This is my solution:

@Override
    protected int computeScrollDeltaToGetChildRectOnScreen(Rect rect) {
        return 0;
    }
When called requestChildFocus will not called scrollToChild()

Answer 2

You're automatically scrolling to your third TextView because SrollView makes a call to ScrollView.scrollToChild upon ViewParent.requestChildFocus.

As per the docs is:

Called when a child of this parent wants focus

When you use android:textIsSelectable="true", you're essentially calling TextView.setTextIsSelectable(true), which makes calls to both View.setFocusable and View.setFocusableInTouchMode.

In short, to stop from automatically scrolling to your third TextView, give the first one some focus.

<TextView
    android:id="@+id/poemTitleTextView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:text="Çanakkale Şehitlerine"
    android:textColor="@color/poem_title"
    android:textSize="24dp"  />