Quelle  emoji_search_widget.xml

<?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="wrap_content"
    android:background="?attr/emoji_picker_background_main">

    <ch.threema.app.emojis.EmojiEditText
        android:id="@+id/search_term"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="@dimen/emoji_search_padding"
        android:layout_marginTop="@dimen/emoji_search_margin"
        android:layout_marginEnd="@dimen/emoji_search_margin"
        android:background="@drawable/emoji_search_input_background"
        android:hint="@string/emoji_search"
        android:imeOptions="actionSearch"
        android:inputType="text"
        android:paddingStart="@dimen/emoji_search_corner_radius"
        android:paddingTop="@dimen/emoji_search_input_padding"
        android:paddingEnd="32dp"
        android:paddingBottom="@dimen/emoji_search_input_padding"
        android:textColor="?attr/colorOnBackground"
        app:layout_constraintEnd_toStartOf="@id/button_show_picker"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <androidx.appcompat.widget.AppCompatImageButton
        android:id="@+id/button_clear_search"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="@dimen/emoji_search_input_padding"
        android:background="@null"
        android:src="@drawable/ic_close"
        android:tint="?attr/colorOnSurface"
        android:visibility="gone"
        app:layout_constraintBottom_toBottomOf="@id/search_term"
        app:layout_constraintEnd_toEndOf="@id/search_term"
        app:layout_constraintTop_toTopOf="@id/search_term" />

    <androidx.appcompat.widget.AppCompatImageButton
        android:id="@+id/button_show_picker"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="@dimen/emoji_button_width"
        android:layout_height="@dimen/emoji_button_width"
        android:layout_marginEnd="@dimen/emoji_search_padding"
        android:src="@drawable/ic_tag_faces_outline"
        android:text="@string/select_emoji"
        android:tint="?attr/colorOnSurface"
        app:layout_constraintBottom_toBottomOf="@id/search_term"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@id/search_term"
        app:layout_constraintTop_toTopOf="@id/search_term" />

    <androidx.constraintlayout.widget.Barrier
        android:id="@+id/group_search_bar_with_button_show_picker"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:barrierDirection="bottom"
        app:constraint_referenced_ids="search_term, button_show_picker" />

    <TextView
        android:id="@+id/no_search_results"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="@string/emoji_search_no_result"
        android:visibility="gone"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/group_search_bar_with_button_show_picker"
        tools:visibility="visible" />

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/search_results"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="4dp"
        android:clipToPadding="false"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/group_search_bar_with_button_show_picker"
        tools:itemCount="5" />

</androidx.constraintlayout.widget.ConstraintLayout>