Android Studio: Keyboard modifies my layout

I placed a text box (EditText) and below it a HorizontalScrollMenuView with several ImageButton. The problem is that when clicking on the text box and opening the keyboard to write the ImageButton they move up and get smaller. And so they remain even after closing the keyboard. Here I leave the code. What is it and how can I solve it? Beforehand thank you very much.

<LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/linearLayout">

    <EditText
        android:id="@+id/TxtBuscar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginStart="119dp"
        android:layout_marginTop="25dp"
        android:width="800px"
        android:ems="10"
        android:inputType="textPersonName"
        android:hint="@string/buscar" />


    <ImageButton
        android:id="@+id/BtnBuscar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/TxtBuscar"
        android:layout_toEndOf="@+id/TxtBuscar"
        app:srcCompat="@android:drawable/ic_search_category_default"
        android:background="#000000FF"
        android:layout_marginTop="40px"
        android:minWidth="60px"
        android:minHeight="60px"/>

</LinearLayout>



<com.darwindeveloper.horizontalscrollmenulibrary.custom_views.HorizontalScrollMenuView
    android:id="@+id/menu"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="90px"
    android:layout_marginLeft="50px"
    android:layout_marginRight="50px"
    app:backgroundMenuColor="#000000FF"
    app:icon_height="240dp"
    app:icon_width="160dp"
    app:item_backgroundColor="#000000FF"
    />