How to prevent a scrollview from scrolling to a webview after data is loaded?

AndroidAndroid LayoutAndroid WebviewAndroid ViewpagerAndroid Scrollview

Android Problem Overview


So I have a fascinating problem. Despite the fact that I'm not manually or programmatically scrolling my view, my WebView is being automatically scrolled to after the data inside it loads.

I've got a fragment in a viewpager. When I first load the pager, it works as expected and everything is shown. But once I "flip the page" the data loads and the WebView pops up to the top of the page, hiding the views above it, which is undesirable.

Does anyone know how to prevent this from happening?

My layout looks like such:

<?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:background="@color/background" >

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

        <TextView
            android:id="@+id/article_title"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginRight="10dp"
            android:layout_marginLeft="10dp"
            android:layout_marginTop="10dp"
            android:layout_marginBottom="2dp"
            android:text="Some Title"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:textColor="@color/article_title"
            android:textStyle="bold" />

        <LinearLayout
            android:id="@+id/LL_Seperator"
            android:layout_width="fill_parent"
            android:layout_height="1dp"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="10dp"
            android:layout_marginTop="5dp"
            android:layout_marginBottom="5dp"
            android:background="@color/text"
            android:orientation="horizontal" >
        </LinearLayout>

        <WebView
            android:id="@+id/article_content"
            android:layout_width="match_parent"
            android:layout_marginRight="10dp"
            android:layout_marginLeft="10dp"
            android:layout_height="wrap_content" />

        <TextView
            android:id="@+id/article_link"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="5dp"
            android:layout_marginTop="5dp"
            android:layout_marginRight="10dp"
            android:layout_marginLeft="10dp"
            android:text="View Full Article"
            android:textColor="@color/article_title"
            android:textStyle="bold" />
    </LinearLayout>

</ScrollView>

I'm also not giving focus to anything. By default, it seems to automatically scroll to the WebView after it has loaded. How do I prevent this?

Android Solutions


Solution 1 - Android

I had the same problem, after hours of trying several ideas, what finally worked for me was simply adding the descendantFocusability attribute to the ScrollView's containing LinearLayout, with the value blocksDescendants. In your case:

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

Haven't had the problem reoccur since.

Solution 2 - Android

You can simply add this to your LinearLayout: android:focusableInTouchMode="true". It works for me.

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

Solution 3 - Android

You should create new class extend ScrollView, then Override requestChildFocus:

public class MyScrollView extends ScrollView {

    @Override 
    public void requestChildFocus(View child, View focused) { 
        if (focused instanceof WebView ) 
           return;
        super.requestChildFocus(child, focused);
    }
}

Then in your xml layout, using:

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

That works for me. The ScrollView will not auto scroll to the WebView anymore.

Solution 4 - Android

Adding these line in main layout solves the problem

android:descendantFocusability="blocksDescendants"

Solution 5 - Android

Like this:

<com.ya.test.view.MyScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:descendantFocusability="beforeDescendants"
        android:focusable="true"
        android:focusableInTouchMode="true" >

Solution 6 - Android

Probably there are people who have the same problem I was having, so I'll help out.

I was trying to put android:descendantFocusability="beforeDescendants" in my main ScrollView as following:

<ScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:descendantFocusability="beforeDescendants">
    /*my linearlayout or whatever to hold the views */

and it wasn't working, so I had to make a RelativeLayout the parent of the ScrollView, and place the android:descendantFocusability="beforeDescendants" in the parent aswell.

So I solved it doing the following:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:descendantFocusability="blocksDescendants">

<ScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent">
/*my linearlayout or whatever to hold the views */

Solution 7 - Android

I added: android:overScrollMode="never" in my ScrollView and set the height to wrap_content.

My view was very complex as it was legacy code with LinearLayout inside LinearLayout inside LinearLayout.

This helped me, hope it will help someone else too!

Solution 8 - Android

I had to use the fully qualified name for MyScrollView, otherwise I got an inflate exception.

<com.mypackagename.MyScrollView 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/background" >

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Solution 1 - Androidmjp66View Answer on Stackoverflow
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Solution 3 - Androiduser1417127View Answer on Stackoverflow
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Solution 5 - AndroidYaC KingView Answer on Stackoverflow
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Solution 8 - AndroidCathal CoffeyView Answer on Stackoverflow