Problem with RelativeLayout, how to solve?

Question

Android

The problem is that the elements in the Relative Layout do not want to be centered horizontally, even if the property layout center horizontal = true, the Relative Layout is nested in the Scroll View.

Help, I will be very grateful

<?xml version="1.0" encoding="utf-8"?>
<ScrollView
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_height="match_parent"
  android:layout_width="match_parent">

  <RelativeLayout
    android:layout_height="wrap_content"
    android:layout_width="wrap_content">

    <ProgressBar
      android:layout_height="wrap_content"
      android:layout_width="wrap_content"
      android:layout_centerHorizontal="true"/>

  </RelativeLayout>

</ScrollView>

Answer 1

This is because you made the RelativeLayout the size of the child(wrap_content). Naturally, in this case, the child is always "in the center" of this layout. Set the width of the match_parent RelativeLayout.