CODEWITHSUNDEEP
androidandroid-recyclerviewandroid-support-libraryandroid-constraintlayout
amodkanthe
amodkanthe

Reputation: 4530

Placing horizontal recyclerview at a specific position using ConstraintLayout

I want to place my horizonatl recyclerview at 30% screen width from start

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:clipToPadding="false"
        android:orientation="horizontal"
        android:paddingStart="20dp"
        android:paddingEnd="20dp"
        android:background="@android:color/white"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@id/guideline" />

    <android.support.constraint.Guideline
        android:id="@+id/guideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.3" />

</android.support.constraint.ConstraintLayout>

But it is not recyclerview not appearing on screen working any idea how to achieve this.

Upvotes: 1

Views: 966

Answers (4)

Akash Suresh Dandwate
Akash Suresh Dandwate

Reputation: 165

This will work fine for you 

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:clipToPadding="false"
        android:orientation="horizontal"
        android:paddingStart="20dp"
        android:paddingEnd="20dp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="@id/guideline"
        app:layout_constraintBottom_toBottomOf="parent"
        />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
       app:layout_constraintGuide_percent=".3" />


</android.support.constraint.ConstraintLayout>

Upvotes: 0

Bhavik Parmar
Bhavik Parmar

Reputation: 54

Remove the ConstraintLayout and use Linearlayout instead, than use the android:weight= property accordingly in both guideline and RecyclerView.

Upvotes: 0

Jo&#227;o Carlos
Jo&#227;o Carlos

Reputation: 1595

your RecyclerView is missing the vertical constraints; Add at least one so that the view can be rendered.

constrained to top:

app:layout_constraintTop_toTopOf="parent"

if you want it to use the whole parent, add these too:

android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"

Upvotes: 0

Tamir Abutbul
Tamir Abutbul

Reputation: 7651

You never gave your recyclerView a vertical constraint so what happened is that at the run time your recyclerView just jumped to the top of the screen.

When I copied your code I saw this error:

This view is not constrained vertically: at runtime, it will jump to the top unless you add a vertical constraint

Some tip - if you see the red line on your view in the XML/the red warning button from the design you should really look at the error and change your layout accordingly.

And of course, I won't leave you without a good working layout - here is the layout that I made for the recyclerView to start at 30% of the screen, I have checked it and its working. (i was working with androidx but just change it to the support library if you want)

<androidx.constraintlayout.widget.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:layout_width="match_parent"
android:layout_height="match_parent">

<androidx.constraintlayout.widget.Guideline
    android:id="@+id/guideline2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layout_constraintGuide_percent="0.3"/>

<androidx.recyclerview.widget.RecyclerView
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginBottom="16dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.506"
    app:layout_constraintStart_toStartOf="@+id/guideline2"
    app:layout_constraintTop_toTopOf="parent"
    android:background="@color/colorPrimaryDark"/>

Upvotes: 1

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