Swago/room/src/main/res/layout/dialog_send_msg.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"
    android:id="@+id/cl"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.constraintlayout.widget.ConstraintLayout
        app:layout_constraintBottom_toBottomOf="parent"
        android:background="#f7f7f7"
        android:layout_width="match_parent"
        android:layout_height="48dp">

        <EditText
            android:id="@+id/et"
            android:layout_margin="8dp"
            android:background="#fff"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toStartOf="@+id/ivSend"
            android:layout_width="0dp"
            android:layout_height="match_parent"/>

        <ImageView
            android:id="@+id/ivSend"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintStart_toEndOf="@+id/et"
            app:layout_constraintEnd_toEndOf="parent"
            android:src="@mipmap/send_nable"
            android:background="#fff"
            android:layout_margin="8dp"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"/>


    </androidx.constraintlayout.widget.ConstraintLayout>


</androidx.constraintlayout.widget.ConstraintLayout>