android - ScrollView not working in my view -


i wish make view scrollable not working. have checked couldn't find problem. however, scrollview visible in portion of screen, last button never shown.
here's code:

<scrollview 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:orientation="vertical"     android:padding="@dimen/margin_default"     android:background="@color/themecolor"     tools:context=".authactivityfragment"     >     <linearlayout         android:layout_width="fill_parent"         android:layout_height="fill_parent"         android:orientation="vertical"         android:layout_margintop="32dp"         android:layout_marginbottom="32dp"         >     <imageview         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_gravity="center"         android:src="@mipmap/logo_large"         />     <linearlayout         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:orientation="vertical"         android:background="@mipmap/login_form_bg"         android:padding="20dp"         android:gravity="center"         android:layout_margin="10dp"         >         <textview             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:text="@string/heading_login"             android:layout_gravity="center"             android:textcolor="@color/black_shade"             style="@android:style/textappearance.devicedefault.medium"             android:textstyle="bold"             />         <edittext android:hint="@string/hint_login_username"             android:id="@+id/etemail"             android:textcolorhint="@color/light_grey_hint"             android:singleline="true"             android:inputtype="textemailaddress"             android:layout_gravity="center"             android:layout_width="match_parent"             android:layout_height="48dp"             android:layout_margin="@dimen/margin_default"             android:background="@drawable/border_fields"             style="@android:style/textappearance.devicedefault.medium"             android:paddingbottom="@dimen/margin_default"             android:paddingtop="@dimen/margin_default"             android:paddingleft="@dimen/large_margins"             android:paddingright="@dimen/large_margins"             />         <edittext android:hint="@string/hint_login_password"             android:id="@+id/etpassword"             android:textcolorhint="@color/light_grey_hint"             android:singleline="true"             android:layout_gravity="center"             android:layout_width="match_parent"             android:layout_height="48dp"             android:background="@drawable/border_fields"             style="@android:style/textappearance.devicedefault.medium"             android:paddingbottom="@dimen/margin_default"             android:paddingtop="@dimen/margin_default"             android:paddingleft="@dimen/large_margins"             android:paddingright="@dimen/large_margins"             android:layout_margin="@dimen/margin_default"             android:inputtype="textpassword"             android:ems="10"             />     </linearlayout>     <linearlayout         android:layout_width="match_parent"         android:layout_height="wrap_content"         >         <linearlayout             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:orientation="horizontal"             android:gravity="center"             android:padding="@dimen/margin_default"             >             <imageview                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:src="@mipmap/ic_small_cross"                 android:layout_gravity="center_vertical"                 android:padding="@dimen/large_margins"                 />             <imageview                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:src="@mipmap/ic_small_cross"                 android:layout_gravity="center_vertical"                 android:padding="@dimen/large_margins"                 />         <imagebutton             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:id="@+id/btnlogin"             android:background="@mipmap/login"             android:layout_marginright="@dimen/margin_default"             android:layout_gravity="center_vertical"             />              <imageview                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:src="@mipmap/ic_small_cross"                 android:padding="@dimen/large_margins"                 android:layout_gravity="center_vertical"                 />             <imageview                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:src="@mipmap/ic_small_cross"                 android:padding="@dimen/large_margins"                 android:layout_gravity="center_vertical"                 />          </linearlayout>     </linearlayout>     <imagebutton         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:id="@+id/btnsignup"         android:background="@mipmap/signup"         android:layout_marginright="@dimen/margin_default"         android:layout_gravity="center_horizontal"         /> </linearlayout> </scrollview> 

everything scrollview fine.

android:layout_margintop="32dp"         android:layout_marginbottom="32dp"<br> 

this piece of code evil. since have given margin first child, not showing full content.change to

android:paddingbottom="32dp"         android:paddingtop="32dp" 

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