sendButton img & layout

app/src/main/res/drawable/ic_send_24.xml

@@ -0,0 +1,11 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?attr/colorControlNormal"
+    android:autoMirrored="true">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M2.01,21L23,12 2.01,3 2,10l15,2 -15,2z"/>
+</vector>

app/src/main/res/layout/messages_fragment.xml

@@ -23,11 +23,10 @@
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_marginStart="8dp"
-        android:layout_marginEnd="8dp"
         android:layout_marginBottom="8dp"
         android:hint="@string/send_text"
         app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintEnd_toStartOf="@+id/sendButton"
         app:layout_constraintStart_toStartOf="parent">
 
         <com.google.android.material.textfield.TextInputEditText
@@ -37,5 +36,21 @@
             android:imeOptions="actionDone"
             android:singleLine="true"
             android:text="" />
+
     </com.google.android.material.textfield.TextInputLayout>
+
+    <ImageButton
+        android:id="@+id/sendButton"
+        android:layout_width="64dp"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="8dp"
+        android:layout_marginBottom="8dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toEndOf="@+id/textInputLayout"
+        app:layout_constraintTop_toBottomOf="@+id/messageListView"
+        app:srcCompat="@drawable/ic_send_24" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>