FCM - activity_main.xml

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
	xmlns:android="http://schemas.android.com/apk/res/android"
	xmlns:tools="http://schemas.android.com/tools"
	android:layout_width="match_parent"
	android:layout_height="match_parent"
	android:paddingBottom="@dimen/activity_vertical_margin"
	android:paddingLeft="@dimen/activity_horizontal_margin"
	android:paddingRight="@dimen/activity_horizontal_margin"
	android:paddingTop="@dimen/activity_vertical_margin"
	android:background="@android:color/white"
	tools:context="com.example.fcm.MainActivity">

	<ImageView
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_above="@+id/zoneCenter"
		android:layout_centerHorizontal="true"
		android:layout_margin="@dimen/activity_horizontal_margin"
		android:contentDescription="@string/app_name"
		android:src="@mipmap/fcm"/>

	<LinearLayout
		android:id="@+id/zoneCenter"
		android:layout_width="match_parent"
		android:layout_height="wrap_content"
		android:layout_centerInParent="true"
		android:orientation="vertical">

		<Button
			android:layout_width="match_parent"
			android:layout_height="wrap_content"
			android:onClick="showToken"
			android:text="@string/btn_show_token"/>

		<LinearLayout
			android:layout_width="match_parent"
			android:layout_height="wrap_content"
			android:orientation="horizontal"
			android:paddingBottom="@dimen/activity_vertical_margin"
			android:paddingTop="@dimen/activity_vertical_margin">

			<Button
				style="@style/CustomButton"
				android:text="@string/btn_subscribe_news"
				android:onClick="subscribe"/>

			<Button
				style="@style/CustomButton"
				android:text="@string/btn_unsubscribe_news"
				android:onClick="unsubscribe"/>

		</LinearLayout>
		
	</LinearLayout>

	<TextView
		android:id="@+id/txt"
		android:layout_width="match_parent"
		android:layout_height="wrap_content"
		android:layout_below="@id/zoneCenter"
		android:paddingBottom="@dimen/activity_vertical_margin"
		android:paddingTop="@dimen/activity_vertical_margin"
		android:gravity="center"
		android:text="@string/result"/>

</RelativeLayout>