cheat-sheets/Activity_main.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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/judulApp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="48dp"
        android:text="Aplikasi Pengiriman Pesan SMS"
        android:textSize="24sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.458"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/nomorHp"
        android:layout_width="345dp"
        android:layout_height="82dp"
        android:layout_marginStart="33dp"
        android:layout_marginTop="13dp"
        android:layout_marginEnd="33dp"
        android:layout_marginBottom="20dp"
        android:ems="10"
        android:hint="Masukkan nomor HP Anda..."
        android:inputType="phone"
        app:layout_constraintBottom_toTopOf="@+id/textView9"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView6" />

    <EditText
        android:id="@+id/pesanSms"
        android:layout_width="342dp"
        android:layout_height="100dp"
        android:layout_marginStart="33dp"
        android:layout_marginTop="20dp"
        android:layout_marginEnd="36dp"
        android:layout_marginBottom="30dp"
        android:ems="10"
        android:gravity="start|top"
        android:hint="Masukkan Pesan Anda..."
        android:inputType="textMultiLine"
        app:layout_constraintBottom_toTopOf="@+id/btnSubmit"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView9" />

    <Button
        android:id="@+id/btnSubmit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"
        android:layout_marginEnd="144dp"
        android:layout_marginBottom="257dp"
        android:text="KIRIM SMS"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/pesanSms" />

    <TextView
        android:id="@+id/textView6"
        android:layout_width="56dp"
        android:layout_height="19dp"
        android:layout_marginStart="36dp"
        android:layout_marginTop="50dp"
        android:layout_marginEnd="319dp"
        android:layout_marginBottom="13dp"
        android:text="Kirim Ke:"
        app:layout_constraintBottom_toTopOf="@+id/nomorHp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/judulApp" />

    <TextView
        android:id="@+id/textView9"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="38dp"
        android:layout_marginTop="20dp"
        android:layout_marginEnd="339dp"
        android:layout_marginBottom="5dp"
        android:text="Teks:"
        app:layout_constraintBottom_toTopOf="@+id/pesanSms"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/nomorHp" />

    <TextView
        android:id="@+id/textView10"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="40dp"
        android:layout_marginTop="30dp"
        android:text="NIM : 042209191"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/btnSubmit" />

    <TextView
        android:id="@+id/textView11"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="39dp"
        android:layout_marginTop="7dp"
        android:text="Nama : Fiky Baharudin"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView10" />

    <TextView
        android:id="@+id/textView12"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="1dp"
        android:layout_marginTop="8dp"
        android:text="UPBJJ JEMBER"
        app:layout_constraintStart_toStartOf="@+id/textView11"
        app:layout_constraintTop_toBottomOf="@+id/textView11" />

</androidx.constraintlayout.widget.ConstraintLayout>