Just use the standard TextInputLayout in the Material Components library.

   <com.google.android.material.textfield.TextInputLayout
       android_layout_width="match_parent"
       android_layout_height="wrap_content"
       android_hint="Hint">

       <com.google.android.material.textfield.TextInputEditText
           android_layout_width="match_parent"
           android_layout_height="wrap_content"
           android_text="Text"/>

   </com.google.android.material.textfield.TextInputLayout>

Create a drawable file bg_edittext.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns_android="http://schemas.android.com/apk/res/android">

    <item>
        <shape android_shape="rectangle">
            <stroke android_width="1dp" android_color="#000"/>
        </shape>
    </item>
    <item android_bottom="1dp">
        <shape android_shape="rectangle">
            <solid android_color="#fff"/>
        </shape>
    </item>

</layer-list>

and go to your edittext, set

 android_background="@drawable/bg_edittext"

I’ve created text input using TextInputLayout and TextInputEditText.
TextInputLayout should have gray background and editText line should be on the bottom without any margin. I tried with 0 margins and padding, but I didn’t manage how to do that.

How it looks like:

What I need: