视图不全宽 - ConstraintLayout - RecyclerView - Android

Question

I have a simple layout for the items in RecyclerView, which contains a TextView and a RadioButton. Here is the layout xml

<androidx.constraintlayout.widget.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="50dp">

    <com.google.android.material.textview.MaterialTextView
        android:id="@+id/tv_thali_name"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:gravity="center_vertical"
        android:hint="Name"       
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/materialRadioButton"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <com.google.android.material.radiobutton.MaterialRadioButton
        android:id="@+id/materialRadioButton"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

Now when I run the app, the RecyclerView looks like this -

If I set a fixed width (which I don't want to) for the TextView, then it is showing the TextView content.

I also tested the xml code in a separate layout,

As you can see it is showing the view as it should. But when using it as an item in RecyclerView, then only the TextView is not showing.

Am I missing something?

Answer 1

Try this edit:

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="50dp"
xmlns:app="http://schemas.android.com/apk/res-auto">

<com.google.android.material.textview.MaterialTextView
    android:id="@+id/tv_thali_name"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:gravity="center_vertical"
    android:hint="Name"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

<com.google.android.material.radiobutton.MaterialRadioButton
    android:id="@+id/materialRadioButton"
    android:layout_width="wrap_content"
    android:layout_height="0dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

I removed some extra constraint app:layout_constraintEnd_toStartOf="@+id/materialRadioButton" and added minor changes. This got to work.

Answer 2

Okay I fixed it. All I had to do is setting the RecyclerView width as match_parent. Previously it was 0dp.