Android: ScrollView in vertical LinearLayout

I'm making an app for Android device and I'm trying to have a ScrollView inside a LinearLayout but when I try to do this the ScrollView take all the space and elements who are after the ScrollView in the LinearLayout disapear. For example: If the ScrollView is not "full": If the ScrollView is "full": As you can see the button disapear... Here is the code of this Activity: ``` <LinearLayout android:id="@+id/linearLayout1" android:layout_width="fill_parent" android:layout_marginLeft="50dp" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:orientation="vertical" android:focusable="true" android:focusableInTouchMode="true" android:background="@drawable/linearlayoutbackground" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/nom_des_joueurs" android:textAppearance="?android:attr/textAppearanceLarge" android:layout_marginBottom="30dp" /> <ScrollView android:id="@+id/scrollView1" android:layout_width="match_parent" android:layout_height="wrap_content"> <LinearLayout android:id="@+id/llPlayersName" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > </LinearLayout> </ScrollView> <Button android:id="@+id/okPlayersName" android:layout_width="match_parent" android:layout_height="match_parent" android:text="@string/ok" android:background="@drawable/backgroundbutton" android:layout_marginTop="30dp" /> </LinearLayout> ``` After I add elements in the LinearLayout who are in the ScrollView. Any solution? Thanks.