increase the height of view while animating to the top

Question

I have three views 1)Toolbar 2)Edittext and Recyclerview. Now on click on edittext i want to animate the toolbar to the top(out of screen generally) up along with edittext and recyclerview .The animation works fine but the problems is that the recycler view is not taking the full height.The recycler view is moved to the top but also recyclerview is not taking the full height

XMl

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#fff">

    <include
        android:id="@+id/tb_explore"
        layout="@layout/toolbar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"></include>


    <LinearLayout
        android:id="@+id/ll_search"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/tb_explore"
        android:layout_marginLeft="05dp"
        android:layout_marginRight="05dp"
        android:layout_marginTop="07dp"
        android:focusable="false"
        android:orientation="horizontal">




            <AutoCompleteTextView
                android:id="@+id/et_search"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_toLeftOf="@+id/imageView11"
                android:layout_toStartOf="@+id/imageView11"
                android:background="@android:color/transparent"
                android:hint="Search by vendor name or keyword"
                android:padding="10dp"
                android:imeOptions="actionGo"
                android:singleLine="true"
                android:textSize="@dimen/regular" />





        <TextView
            android:id="@+id/tv_cancel"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="0.2"
            android:gravity="center"
            android:text="Cancel"
            android:visibility="gone" />
    </LinearLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/rv_explore_search"
        android:layout_width="match_parent"
        android:layout_height="350dp"
        android:layout_below="@+id/ll_search"
        android:layout_marginTop="10dp"
        android:background="#efd3d3"
        android:visibility="visible" />

Code

 rlHeader.animate()
                .translationY(-rlHeader.getHeight());


        llSearch.animate()
                .translationY(-rlHeader.getHeight())
                .setListener(new Animator.AnimatorListener() {
                    @Override
                    public void onAnimationStart(Animator animation) {

                        rvExplore.getLayoutParams().height = rvExplore.getHeight() + rlHeader.getHeight(); //here i am increasing the height but no use

                        rvExplore.animate().translationY(-rlHeader.getHeight());


                    }

                    @Override
                    public void onAnimationEnd(Animator animation) {


                        etSearch.requestFocus();
                        tvCancel.setVisibility(View.VISIBLE);

                    }

                    @Override
                    public void onAnimationCancel(Animator animation) {

                    }

                    @Override
                    public void onAnimationRepeat(Animator animation) {

                    }
                });