Vertical bias and guidlines are not working in recyclerview android

Question

I want to use vertical bias to view always top but, I want to use guidelines to restrict the height on the screen. But If I used height wrap content it's not working until I set it to height 0dp. Does any better approach for this?

<?xml version="1.0" encoding="utf-8"?>
<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"
    android:background="@color/white">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recylerview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingStart="10dp"
        android:paddingEnd="10dp"
        android:paddingBottom="10dp"
        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
        app:layout_constraintBottom_toBottomOf="@+id/guidelines"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0" />


<androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.9" />
    </androidx.constraintlayout.widget.ConstraintLayout>

After adding @Ivo answer

<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"
    android:background="@color/white">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/RecyclerView"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:paddingStart="10dp"
        android:paddingEnd="10dp"
        android:paddingBottom="10dp"
        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
        app:layout_constraintBottom_toTopOf="@+id/guideline"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHeight_default="wrap"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.0" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.9" />

</androidx.constraintlayout.widget.ConstraintLayout>

but the problem is my last view is cutting

What's exactly wrong now? I assume it's now cut off at the guideline or not? isn't that exactly what you wanted? or how do you expect it to work? — Ivo, Oct 25 '21 at 08:54
@IvoBeckers my recylerview going below the guidline. I don't want to go view outside of guidline and i want default height to wrap — Kotlin Learner, Oct 25 '21 at 09:01

Ivo · Answer 1 · 2021-10-25T07:59:06.263

1

I'm not sure if I completely understand it but I think you actually want android:orientation="horizontal" instead of android:orientation="vertical" in your Guideline

EDIT:

try using 0dp and also adding app:layout_constraintHeight_default="wrap" to your recyclerview

edited Oct 25 '21 at 07:59

answered Oct 25 '21 at 07:29

Ivo

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How can i restricted recyclerview height if i used horizontal in guidelines ? – Kotlin Learner Oct 25 '21 at 07:37
a guideline is a line. you want your recyclerview to be above the line. so the line goes from left to right. So it's a horizontal line – Ivo Oct 25 '21 at 07:40
you are right I updated the code. – Kotlin Learner Oct 25 '21 at 07:48
but main problem is If i set recylerview height to 0dp it restrict the line. But if i used wrap content it's not working. I want mostly the recyclerview top of screen. – Kotlin Learner Oct 25 '21 at 07:50
is there a problem with using 0dp? – Ivo Oct 25 '21 at 07:51
1

yes, For example If my item is one or two I want to show in top of screen. if item more than 5 than I want to show full recyclerview untill Guidelines . – Kotlin Learner Oct 25 '21 at 07:55
ah ok. now I understand – Ivo Oct 25 '21 at 07:57
@vivekmodi see my edit – Ivo Oct 25 '21 at 07:59
is there any better suggestion? I tried with vertical bias alone its not working. I asked in other [example](https://stackoverflow.com/q/69700522/11560810) but I didn't get it – Kotlin Learner Oct 25 '21 at 07:59
I updated my answer, the problem is view is going outside of guideline – Kotlin Learner Oct 25 '21 at 08:05
is there any other solution to fix that? – Kotlin Learner Oct 25 '21 at 08:16

Vertical bias and guidlines are not working in recyclerview android

1 Answers1