Scroll view not workingbelow is XML code

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Android

<?xml version="1.0" encoding="utf-8"?><!--<ScrollView -->
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
android:background="@drawable/loginbg">


<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#80FFFFFF">


>


<LinearLayout
android:id="@+id/linearheader"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"

android:layout_centerHorizontal="true"

android:orientation="vertical">

<ImageView
android:id="@+id/appicon"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:layout_marginTop="110dp"
android:src="@drawable/applogo" />


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linearamainbody"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/linearheader"

android:layout_marginLeft="40dp"
android:layout_marginRight="40dp"
android:orientation="vertical"

>


<android.support.design.widget.TextInputLayout
android:id="@+id/input_layout_name"


android:layout_width="match_parent"
android:layout_height="wrap_content">

<EditText
android:id="@+id/input_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/username"
android:singleLine="true" />


<android.support.design.widget.TextInputLayout
android:id="@+id/input_layout_passwrd"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:passwordToggleDrawable="@drawable/eyetoggle"
app:passwordToggleEnabled="true"
app:passwordToggleTint="@color/black">

<EditText
android:id="@+id/input_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/password"
android:inputType="textPassword" />



<button
android:id="@+id/btn_login"
="" android:layout_width="150dp" android:layout_height="wrap_content" android:layout_gravity="center" android:layout_margintop="30dp" android:text="@string/Login">

<TextView
android:id="@+id/txt_forgotpass"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_margin="15dp"
android:clickable="true"
android:text="@string/forgotpassword" />









What I have tried:

Tried everything it only works when i add more content logically it should work when keyboard is on.