In my Android Studio my constraint widget does not work. Whenever I put in a value for the top margin the design doesn't change. for example, in the image you will see 84 in the constraint widget I want to change it to 20 but when I do nothing happens. How do I make this work?
Here is the xml code:
<?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/txtVw"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/ALButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onBtnClick"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/edtxtName" />
<EditText
android:id="@+id/edtxtName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="84dp"
android:ems="10"
android:inputType="textPersonName"
android:text="Name"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txtVw" />
</androidx.constraintlayout.widget.ConstraintLayout>
This is the design image:
