activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity" android:id="@+id/parent_layout">ใ

    <Button
            android:text="เริ่มหาคำตอบ"
            android:layout_width="250dp"
            android:layout_height="48dp"
            android:id="@+id/btn_question_submit"
            android:background="@color/colorAccent"
            android:layout_marginBottom="26dp"
            app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintStart_toStartOf="parent"
            android:layout_marginStart="8dp" app:layout_constraintEnd_toEndOf="parent" android:layout_marginEnd="8dp"
            android:textColor="@android:color/white" android:textStyle="bold"/>
    <EditText
            android:layout_width="262dp"
            android:layout_height="wrap_content"
            android:inputType="textPersonName"
            android:ems="10"
            android:id="@+id/et_question"
            android:layout_marginEnd="8dp"
            app:layout_constraintEnd_toEndOf="parent"
            android:layout_marginStart="8dp"
            app:layout_constraintStart_toStartOf="parent"
            android:layout_marginBottom="8dp"
            android:layout_marginTop="8dp"
            app:layout_constraintHorizontal_bias="0.503"
            app:layout_constraintBottom_toTopOf="@+id/btn_question_submit"
            app:layout_constraintTop_toBottomOf="@+id/textView2"
            android:hint="   ...ใช่หรือไม่? ...ดีไหม?"/>
    <TextView
            android:text="เพื่อนไง?"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/textView" android:textSize="30sp"
            android:textStyle="bold" android:textColor="@android:color/black" android:layout_marginBottom="8dp"
            android:layout_marginTop="8dp"
            android:layout_marginEnd="8dp"
            app:layout_constraintEnd_toEndOf="parent" android:layout_marginStart="8dp"
            app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="@+id/btn_question_submit"/>
    <ImageView
            android:layout_width="150dp"
            android:focusableInTouchMode="true"
            android:layout_height="150dp" app:srcCompat="@drawable/ic_003_laugh"
            android:id="@+id/imageView" app:layout_constraintEnd_toEndOf="parent"
            android:layout_marginEnd="8dp" app:layout_constraintStart_toStartOf="parent"
            android:layout_marginStart="8dp" android:layout_marginTop="8dp"
            app:layout_constraintTop_toTopOf="parent" android:layout_marginBottom="8dp"
            app:layout_constraintBottom_toTopOf="@+id/textView" tools:srcCompat="@drawable/ic_003_laugh"
    />
    <TextView
            android:text="ไม่มีเพื่อนให้ถาม ก็มาถามเราในนี้ได้เลย"
            android:layout_width="wrap_content"
            android:layout_height="19dp"
            android:id="@+id/textView2" app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="8dp"
            app:layout_constraintEnd_toEndOf="parent" android:layout_marginEnd="8dp"
            app:layout_constraintTop_toBottomOf="@+id/textView" android:layout_marginTop="16dp"/>
</android.support.constraint.ConstraintLayout>