activity_filter_students.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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".FilterStudents">

    <TextView
        android:id="@+id/textView13"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="SEARCH"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/et_filter_u"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="2dp"
        android:layout_marginEnd="5dp"
        android:ems="10"
        android:hint="Username"
        android:inputType="text"
        app:layout_constraintEnd_toEndOf="@+id/textView13"
        app:layout_constraintTop_toBottomOf="@+id/textView13" />

    <EditText
        android:id="@+id/et_filter_f"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="1dp"
        android:layout_marginTop="44dp"
        android:ems="10"
        android:hint="First Name"
        android:inputType="text"
        app:layout_constraintStart_toStartOf="@+id/et_filter_u"
        app:layout_constraintTop_toTopOf="@+id/et_filter_u" />

    <EditText
        android:id="@+id/et_filter_l"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="1dp"
        android:ems="10"
        android:hint="Last Name"
        android:inputType="text"
        app:layout_constraintBottom_toTopOf="@+id/et_filter_major"
        app:layout_constraintStart_toStartOf="@+id/et_filter_major" />

    <EditText
        android:id="@+id/et_filter_major"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="44dp"
        android:layout_marginEnd="3dp"
        android:ems="10"
        android:hint="Major"
        android:inputType="text"
        app:layout_constraintEnd_toEndOf="@+id/et_filter_gpaLow"
        app:layout_constraintTop_toBottomOf="@+id/et_filter_f" />

    <EditText
        android:id="@+id/et_filter_gpaLow"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="2dp"
        android:layout_marginBottom="1dp"
        android:ems="10"
        android:hint="GPA Lower Bound"
        android:inputType="numberDecimal"
        app:layout_constraintBottom_toTopOf="@+id/et_filter_gpaUpper"
        app:layout_constraintStart_toStartOf="@+id/et_filter_gpaUpper" />

    <EditText
        android:id="@+id/et_filter_gpaUpper"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginTop="49dp"
        android:ems="10"
        android:hint="GPA Upper Bound"
        android:inputType="numberDecimal"
        app:layout_constraintStart_toStartOf="@+id/lv_filter"
        app:layout_constraintTop_toBottomOf="@+id/et_filter_major" />

    <Button
        android:id="@+id/btn_filter_filter"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="3dp"
        android:layout_marginTop="22dp"
        android:text="Filter"
        app:layout_constraintStart_toStartOf="@+id/btn_filter_back"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/btn_filter_back"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="46dp"
        android:layout_marginEnd="38dp"
        android:text="Go Back"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="@+id/btn_filter_filter" />

    <ListView
        android:id="@+id/lv_filter"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginStart="1dp"
        android:layout_marginTop="1dp"
        android:layout_marginEnd="1dp"
        android:layout_marginBottom="1dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/et_filter_gpaUpper" />

</androidx.constraintlayout.widget.ConstraintLayout>