fedilab-Android-App/app/src/main/res/layout/fragment_bottom_sticker_emoji_dialog.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:background="@android:color/transparent"
    android:orientation="vertical">


    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginStart="16dp"
        android:layout_marginEnd="16dp">

        <TextView
            android:id="@+id/txtClose"
            android:layout_width="wrap_content"
            android:layout_height="?attr/actionBarSize"
            android:layout_marginStart="8dp"
            android:layout_marginLeft="8dp"
            android:gravity="center"
            android:text="@string/close"
            android:textAppearance="@style/TextAppearance.AppCompat.Large.Inverse"
            android:visibility="gone"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <View
            android:id="@+id/lineView"
            android:layout_width="match_parent"
            android:layout_height="2px"
            android:background="@android:color/white"
            android:visibility="gone"
            app:layout_constraintTop_toBottomOf="@+id/txtClose"
            tools:ignore="PxUsage" />

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/rvEmoji"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_margin="8dp"
            app:layout_behavior="@string/bottom_sheet_behavior"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/lineView" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="?attr/actionBarSize"
            android:layout_marginEnd="8dp"
            android:layout_marginRight="8dp"
            android:gravity="center"
            android:text="@string/done"
            android:textAppearance="@style/TextAppearance.AppCompat.Large.Inverse"
            android:visibility="gone"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="parent" />


    </androidx.constraintlayout.widget.ConstraintLayout>

</LinearLayout>