Google Plust Login and +1 button Layout

Main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:plus="http://schemas.android.com/apk/lib/com.google.android.gms.plus"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="12dp">
    <LinearLayout
    	android:orientation="horizontal"
    	android:layout_width="wrap_content"
    	android:layout_height="wrap_content"
    	android:layout_gravity="center"
    	android:gravity="center">
	 <com.google.android.gms.common.SignInButton
        android:id="@+id/sign_in_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center" />
	<Button
        android:id="@+id/logout_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="Logout"/>
    </LinearLayout>
   
    <com.google.android.gms.plus.PlusOneButton
        android:id="@+id/plus_one_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        plus:size="standard"
        plus:annotation="inline"
        android:layout_marginTop="12dp" />
    
    <ImageView
        android:src="@android:drawable/ic_menu_gallery"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:id="@+id/profile_image"
        android:layout_marginTop="12dp" />
    <TextView
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/profile_name"
        android:singleLine="true" />
    <TextView
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/profile_nickname"
        android:singleLine="true" />
    <TextView
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/profile_about"
        android:maxLines="3" />
</LinearLayout>