Android studio keeps replacing match_parent with fixed dp value

Question

Android studio (v 2.3.1) keeps replacing the match_parent of a RelativeLayout with a fixed dp vanue. For example, when I type match_parent as the width, it replaces it with 368dp. When I test the app, I see that the RelativeLayout indeed is wrong.

Does anyone know how to fix this?

<?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"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context="be.mawey.lamachat.LoginActivity">       <RelativeLayout         android:layout_width="match_parent" <!-- THIS IS BEING REPLACED WITH 368dp -->         android:layout_height="match_parent" <!-- THIS IS BEING REPLACED WITH 495dp -->         tools:layout_editor_absoluteX="8dp"         tools:layout_editor_absoluteY="8dp">          <Button             android:id="@+id/buttonLogin"             android:layout_width="match_parent"             android:layout_height="50dp"             android:layout_alignParentStart="true"             android:layout_centerVertical="true"             android:background="@color/colorPrimary"             android:text="Login"             android:textColor="@android:color/white"             android:textSize="18sp"             tools:layout_editor_absoluteX="8dp"             tools:layout_editor_absoluteY="292dp" />          <EditText             android:id="@+id/editTextCode"             android:layout_width="match_parent"             android:layout_height="50dp"             android:layout_above="@+id/buttonLogin"             android:layout_alignParentStart="true"             android:ems="10"             android:hint="Secret code here"             android:inputType="numberPassword"             tools:layout_editor_absoluteX="8dp"             tools:layout_editor_absoluteY="234dp" />          <TextView             android:id="@+id/textView3"             android:layout_width="match_parent"             android:layout_height="50dp"             android:fontFamily="monospace"             android:text="example"             android:textAlignment="center"             android:textColor="@color/colorPrimaryDark"             android:textSize="36sp"             android:textStyle="italic"             tools:layout_editor_absoluteX="8dp"             tools:layout_editor_absoluteY="16dp" />     </RelativeLayout>  </android.support.constraint.ConstraintLayout> 

Answer 1

Do it like as shown in picture