CODEWITHSUNDEEP
androidandroid-scrollviewandroid-constraintlayout
user7879812
user7879812

Reputation:

How can I scroll vertically the ConstraintLayout?

The content of the main activity looks like:

the main screen looks like (all this inside ConstraintLayout):

The image description may be too long to be displayed, to fix this I can put it inside a ScrollView, and this works just fine. However, I would like to ScrollView the whole ConstraintLayout, and this is not functioning properly: cannot scroll and some TextViews do not appear!

Relevant Code:

<android.support.constraint.ConstraintLayout  
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/desciptionScroll"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.picture.nasa.nasadailyimage.NasaDailyImage"
    tools:showIn="@layout/activity_nasa_daily_image">

 <TextView
    android:id="@+id/imageTitle"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="8dp"
    android:layout_marginStart="8dp"
    android:text="@string/test_image_title"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

 <TextView
    android:id="@+id/imageDate"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="8dp"
    android:layout_marginStart="8dp"
    android:text="@string/test_image_date"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/imageTitle" />

 <ImageView
    android:id="@+id/imageDisplay"
    android:layout_width="368dp"
    android:layout_height="408dp"
    android:layout_marginLeft="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="3dp"
    android:src="@mipmap/test_image"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/imageDate" />

<TextView 
    android:id="@+id/imageDescription"
    android:layout_width="368dp"
    android:layout_height="0dp"
    android:layout_marginLeft="8dp" 
    android:layout_marginStart="8dp" 
    android:layout_marginTop="4dp" 
    android:text="@string/test_image_description" 
    app:layout_constraintLeft_toLeftOf="parent" 
    app:layout_constraintTop_toBottomOf="@+id/imageDisplay" />

</android.support.constraint.ConstraintLayout>

Upvotes: 10

Views: 27523

Answers (4)

kip2
kip2

Reputation: 6863

No need to use a NestedScrollView as long as you can get the constraint layout to "extend" beyond its ScrollView parent as described in this related SO answer

Upvotes: 0

Sam
Sam

Reputation: 6395

surrounded my constrinat-layout with a ScrollView tag and gave it the property android:isScrollContainer="true".

Upvotes: -1

Angel Garcia
Angel Garcia

Reputation: 344

For making the elements in the screen scrollable I think you could use a NestedScrollView inside a CoordinatorLayout. I usually put a LinearLayout with all the elements I would display there.

For example:

<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.xengar.android.puzzlewildanimals.ui.HelpActivity">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Dark" />

    </android.support.design.widget.AppBarLayout>

    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <android.support.constraint.ConstraintLayout  
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
            android:id="@+id/desciptionScroll"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            tools:context="com.picture.nasa.nasadailyimage.NasaDailyImage"
            tools:showIn="@layout/activity_nasa_daily_image">


            <TextView
                android:id="@+id/imageTitle"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="8dp"
                android:layout_marginStart="8dp"
                android:text="@string/test_image_title"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <TextView
                android:id="@+id/imageDate"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="8dp"
                android:layout_marginStart="8dp"
                android:text="@string/test_image_date"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/imageTitle" />

            <ImageView
                android:id="@+id/imageDisplay"
                android:layout_width="368dp"
                android:layout_height="408dp"
                android:layout_marginLeft="8dp"
                android:layout_marginStart="8dp"
                android:layout_marginTop="3dp"
                android:src="@mipmap/test_image"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/imageDate" />

            <TextView
                android:id="@+id/imageDescription"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="8dp"
                android:layout_marginStart="8dp"
                android:layout_marginTop="4dp"
                android:text="@string/test_image_description"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/imageDisplay" />




        </android.support.constraint.ConstraintLayout>
    </android.support.v4.widget.NestedScrollView>

</android.support.design.widget.CoordinatorLayout>

If that doesn't work you can replace the ConstraintLayout with a LinearLayout. I hope that helps.

Upvotes: 17

Zoe - Save the data dump
Zoe - Save the data dump

Reputation: 28229

To add scrolling to any view, you add a ScrollView. In your code, add it as the root(If the ScrolLView isn't the root and there is more content, add the ScrollView around the ConstraintLayout). move the namespaces(lines containing xmlns) to the new root. Add width and height in the ScrollView to match_parent(or whatever you have) and set the height of the ConstraintLayout to wrap_content.

However, you will not be able to scroll correctly in design mode. (reference). But it will still work as ecpected on a device.

NOTE:

If your layout doesn't scroll with a SCrollView, make sure you set the height of the ConstraintLayout to wrap_content

Upvotes: 2

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