Privacyok

<?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:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity">

    <Button

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/btndemo"

        android:layout_margin="30dp"

        android:text="Click here"

        android:textColor="#FFFFFF"

        android:textSize="30sp"

       

        />

</LinearLayout>