Arrange views in Coordinator Layout

Question

I have problem making my Frame layout be below Bottom Navigation Drawer (yes I put it on the top :)). Right now the top of Frame layout is hidden by BND because it is aligned with parents top just like BND instead of being aligned with BNDs bottom.

Here is the code:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/coordID">

    <android.support.design.widget.BottomNavigationView
        android:id="@+id/BND_ID"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?android:attr/windowBackground"
        app:menu="@menu/m_navigation"
        />

    <FrameLayout
        android:id="@+id/fID2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
    </FrameLayout>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/dummyFAB"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end|bottom"
        android:layout_margin="16dp"
        app:srcCompat="@drawable/ic_settings"
        app:layout_insetEdge="bottom" />

  </android.support.design.widget.CoordinatorLayout>

Answer 1

You should try to wrap them in RelativeLayout something like this:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/coordID">

    <RelativeLayout
        android:id="@+id/relativeLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">


        <android.support.design.widget.BottomNavigationView
            android:id="@+id/BND_ID"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="?android:attr/windowBackground"
            app:menu="@menu/m_navigation" />

        <FrameLayout
            android:id="@+id/fID2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/BND_ID"/>

    </RelativeLayout>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/dummyFAB"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_gravity="end|bottom"
        app:layout_anchor="@+id/relativeLayout"
        app:layout_anchorGravity="right|bottom"
        app:layout_insetEdge="bottom"
        app:srcCompat="@drawable/ic_settings" />



</android.support.design.widget.CoordinatorLayout>

Answer 2

CoordinatorLayout is just a super-powered FrameLayout as described in the docs.

That's why the views are overlapping. Unless you want to use any of the behavior that this view group offers I would suggest you to change to a different layout setup such as

 <RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.BottomNavigationView
        android:id="@+id/BND_ID"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?android:attr/windowBackground"
        app:menu="@menu/m_navigation" />

    <FrameLayout
        android:id="@+id/fID2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/BND_ID">
    </FrameLayout>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/dummyFAB"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_gravity="end|bottom"
        app:layout_insetEdge="bottom"
        app:srcCompat="@drawable/ic_settings" />


</RelativeLayout>

or make use of one of the coordinatorLayout behaviors

eg.

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 
   xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:id="@+id/coordID">

<android.support.design.widget.BottomNavigationView
    android:id="@+id/BND_ID"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?android:attr/windowBackground"
    //Add the line below
    app:layout_scrollFlags="scroll|enterAlways"
    app:menu="@menu/m_navigation"/>

<FrameLayout
    android:id="@+id/fID2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    //Add the line below
    app:layout_behavior="@string/appbar_scrolling_view_behavior">
</FrameLayout>

<android.support.design.widget.FloatingActionButton
    android:id="@+id/dummyFAB"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="end|bottom"
    android:layout_margin="16dp"
    app:srcCompat="@drawable/ic_settings"
    app:layout_insetEdge="bottom" />

</android.support.design.widget.CoordinatorLayout>

so when whatever you put inside the frameLayout scroll your bottom nav will hide.