How to set recyclerview minimum height wrap_content but maximum in percent using constraint layout?

user_8205099 0
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I have a recyclerview and i am using constraint layout . Now i want to use height as wrap_content but want to set maximum height in percent .How i can achieve this using constraint layout?

   <androidx.recyclerview.widget.RecyclerView
    android:id="@+id/recyclerView"
    android:layout_width="match_parent"
    android:visibility="gone"

    app:layout_constraintTop_toBottomOf="@+id/search_view"

    android:layout_height="0dp"
    app:layout_constraintHeight_default="wrap"
    app:layout_constraintHeight_max="500dp"
    android:scrollbars="vertical"/>
android-constraintlayout android-recyclerview android-layout android
1 Answers

Since you are using ConstraintLayout you could use a Guideline as the following to constraint the RecyclerView's height.

<androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.85"/>

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:scrollbars="vertical"
        app:layout_constraintTop_toBottomOf="@+id/search_view"
        app:layout_constraintBottom_toBottomOf="@id/guideline3" />

The Guideline has a layout_constraintGuide_percent in which you could specify the percentage you want for the RecyclerView.

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