Signal-Android/app/src/main/res/layout/attachment_keyboard.xml

<?xml version="1.0" encoding="utf-8"?>
<merge
    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="wrap_content">

  <androidx.constraintlayout.widget.ConstraintLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      tools:layout_height="200dp">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/attachment_keyboard_media_list"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_marginBottom="8dp"
        android:paddingStart="8dp"
        android:clipToPadding="false"
        android:clipChildren="false"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toTopOf="@id/attachment_keyboard_button_list"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/attachment_keyboard_button_list"
        android:layout_width="match_parent"
        android:layout_height="80dp"
        android:paddingStart="8dp"
        android:clipToPadding="false"
        android:clipChildren="false"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>

    <TextView
        android:id="@+id/attachment_keyboard_permission_text"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="12dp"
        android:layout_marginEnd="12dp"
        android:text="@string/AttachmentKeyboard_Signal_needs_permission_to_show_your_photos_and_videos"
        android:textColor="?attachment_keyboard_button_foreground"
        android:gravity="center"
        android:visibility="gone"
        style="@style/Signal.Text.Body"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toTopOf="@id/attachment_keyboard_permission_button"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>

    <Button
        android:id="@+id/attachment_keyboard_permission_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/AttachmentKeyboard_give_access"
        android:visibility="gone"
        style="@style/Button.Primary"
        app:layout_constraintTop_toBottomOf="@id/attachment_keyboard_permission_text"
        app:layout_constraintBottom_toTopOf="@id/attachment_keyboard_button_list"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>

  </androidx.constraintlayout.widget.ConstraintLayout>

</merge>