fragment_coach.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:background="#05897D"
    android:backgroundTint="#05897D"
    android:gravity="center"
    android:orientation="vertical"
    android:padding="15dp"
    tools:context=".Register">


    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"
        android:gravity="center"
        android:text="Inserisci Maestro"
        android:textColor="#FFFFFF"
        android:textSize="25sp"
        android:textStyle="bold" />

    <com.google.android.material.textfield.TextInputLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/name"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/nome"
            android:textColor="#FFFFFF"
            android:textColorHighlight="#FFFFFF"
            android:textColorHint="#FFFFFF" />
    </com.google.android.material.textfield.TextInputLayout>

    <com.google.android.material.textfield.TextInputLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/speciality"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Specialità"
            android:textColor="#FFFFFF"
            android:textColorHighlight="#FFFFFF"
            android:textColorHint="#FFFFFF"
            android:textColorLink="#FFFFFF" />
    </com.google.android.material.textfield.TextInputLayout>


    <Button
        android:id="@+id/btn_save"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:backgroundTint="#741111"
        android:text="Inserisci" />

</LinearLayout>