Make Android Linear Layout Vertical expand as I type in the edittext inside -

i have eddittext inside linear layout @ bottom of screen, bit whatsapp write messages. can add new lines in edit linear layout stays same, linear layout expand enter more lines. have listview above linear layout

here layout xml:

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:paddingtop="@dimen/activity_vertical_margin" tools:context=".chatactivity" android:background="#ffffff">   <listview     android:id="@+id/listview"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:layout_above="@+id/linlay"     android:divider="@android:color/transparent"     android:dividerheight="0dp"/>         <linearlayout         android:orientation="horizontal"         android:id="linlay"         android:layout_width="match_parent"         android:layout_height="match_parent">          <edittext             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:id="@+id/et_message"             android:hint="enter message" /> 

//i want lin layout expand edit expands vertically

    </linearlayout>   <com.gc.materialdesign.views.buttonfloat     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:id="@+id/btn_send"     android:layout_aligntop="@+id/chatmessageview"     android:layout_alignparentright="true"     android:layout_alignparentend="true"     android:layout_marginright="5dp"     app:icondrawable="@drawable/ic_action_send_now"     android:background="@color/chatblue10" />   </relativelayout> 

you can use minheight,

     <linearlayout         android:layout_alignparentbottom="true"         android:id="@+id/layout_message"         android:orientation="horizontal"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:clickable="true">     <edittext             android:id="@+id/textbody"             android:layout_width="0dp"             android:layout_weight="1"             android:minheight="48dp"             android:hint="@string/send_text"             android:maxlines="5"             android:textsize="16sp"             android:layout_height="wrap_content"/>      <imageview          ....          .... 

else can show xml unsterdand more probleme