app/src/main/res/layout/item_message_sent.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="8dp">
<TextView
android:id="@+id/text_message_body"
android:text="hello, hello!"
android:background="@drawable/message_sent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:maxWidth="240dp"
android:padding="8dp"
android:textColor="#ffffff"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/text_message_time"
android:text="11:40"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="10sp"
android:layout_marginRight="4dp"
app:layout_constraintBottom_toBottomOf="@+id/text_message_body"
app:layout_constraintRight_toLeftOf="@+id/text_message_body" />
</android.support.constraint.ConstraintLayout>