android - virtualkeyborad hidden Edittext -

i have problem , i'm making forum , when insert post if give edittext write virutal keyboard , can not see write.

anyone has idea how raise edittext not hidden virtual keyboard

this xml:

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/linearlayout1" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:paddingbottom="@dimen/activity_vertical_margin" android:paddingleft="@dimen/activity_horizontal_margin" android:paddingright="@dimen/activity_horizontal_margin" android:paddingtop="@dimen/activity_vertical_margin" tools:context="com.example.aulasg.foros" >   <listview     android:id="@+id/lvforotemas"     android:layout_width="match_parent"     android:layout_height="392dp" >  </listview>  <linearlayout     android:layout_width="match_parent"     android:layout_height="wrap_content" >      <edittext         android:id="@+id/comentariomensaje"         android:layout_width="281dp"         android:layout_height="wrap_content"         android:layout_weight="0.49"         android:ems="10" />      <button         android:id="@+id/button1"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_weight="0.49"         android:onclick="insertarcomentario"         android:text="button" />    </linearlayout>  </linearlayout> 

add follow code activity in androidmanifest.xml android:windowsoftinputmode="adjustpan"