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I want to center my LinearLayout within ScrollView. When LinearLayout's height is small it's centered alright (see image #1) but when LinearLayout's height is bigger than the screen's height then it behaves strange. I cannot see the top of LinearLayout (see image #2) and at the bottom of ScrollView there's huge padding. I don't know what's happening here. When there are lots of content in LinearLayout the whole screen should look like in image #3.
image #1
image #2
image #3
Here's my layout file:
<?xml version="1.0" encoding="utf-8"?> <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#cccfff" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_margin="28dp" android:background="#ffffff" android:orientation="vertical" android:paddingBottom="40dp" android:paddingLeft="20dp" android:paddingRight="20dp" android:paddingTop="40dp" > <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="16dp" android:src="@drawable/ic_launcher" /> <TextView android:id="@+id/tip_title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="12dp" android:text="Title" android:textColor="@color/orange_text" android:textSize="@dimen/font_size_medium" /> <TextView android:id="@+id/tip_description" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Description description..." android:textSize="@dimen/font_size_small" /> </LinearLayout> </ScrollView> 
565
To do vertical centering when using ScrollView with React Native, we can set the contentContainerStyle prop to an object with some flexbox styles. to expand the ScrollView to fit the View . And we set justifyContent to 'center' to center align the ScrollView .
fillViewport allows scrollView to extend it's height equals to the full height of device screen's height in the cases when the child of scroll view has less height.
In Android, a ScrollView is a view group that is used to make vertically scrollable views. A scroll view contains a single direct child only. In order to place multiple views in the scroll view, one needs to make a view group(like LinearLayout) as a direct child and then we can define many views inside it.
To scroll to top of the ScrollView with React Native, we assign a ref to the ScrollView and call scrollTo on the ref's value. to create a ref with useRef and set that as the value of the ref prop of the ScrollView . Then we add a Button that calls ref. current.
You can use android:fillViewport="true" to center the content. Something like this:
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:fillViewport="true"> <!-- content --> </ScrollView> You should use an external horizontal LinearLayout. It's working for me in the same situation.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:orientation="horizontal" > <ScrollView android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" > <LinearLayout android:orientation="vertical" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center_horizontal" > <TextView android:text="@string/your_text" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout> </ScrollView> </LinearLayout> If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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