+ <EditText
+ android:id="@+id/messageText"
+ android:layout_width="0dp"
+ android:layout_height="wrap_content"
+ android:ems="10"
+ android:hint="@string/edit_message"
+ android:inputType="textPersonName"
+ app:layout_constraintEnd_toStartOf="@+id/sendButton"
+ app:layout_constraintHorizontal_bias="0.5"
+ app:layout_constraintStart_toStartOf="parent"
+ app:layout_constraintTop_toTopOf="parent"/>
+
+ <Button
+ android:id="@+id/sendButton"
+ android:layout_width="wrap_content"
+ android:layout_height="wrap_content"
+ android:layout_marginStart="16dp"
+ android:layout_marginEnd="16dp"
+ android:onClick="sendMessage"
+ android:text="@string/button_send"
+ app:layout_constraintBaseline_toBaselineOf="@+id/messageText"
+ app:layout_constraintEnd_toEndOf="parent"
+ app:layout_constraintHorizontal_bias="0.5"
+ app:layout_constraintStart_toEndOf="@+id/messageText" />
+
+ <Button
+ android:id="@+id/button_photo"