Q:

RelativeLayout issues

I'm starting developing for Android and the layout system seems to be quite difficult compared to iOS. I have a RelativeLayout with 4 ImageViews. The most right ImageView should be vertically in the middle of the screen. The other 3 ImageViews should be placed left to it. After switching from a LinearLayout to a RelativeLayout (still don't know if this was clever) as soon as I add this line
android:layout_toLeftOf="@id/moto_icon"

to the left items (moto icon for the first item [cloud1], cloud1 for the second item, etc.) the ImageViews of the clouds disappear. 
This is my entire layout file:
<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="de.manuel_schulze.motorradonline.MainActivity">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

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

    <include layout="@layout/content_main" />

    <LinearLayout
        android:id="@+id/splashScreen"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/colorPrimary"
        android:gravity="center"
        android:orientation="vertical"
        android:padding="5dp"
        android:visibility="visible">

        <RelativeLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_marginBottom="8dp"
            android:orientation="horizontal">

            <ImageView
                android:id="@+id/moto_icon"
                android:layout_width="56dp"
                android:layout_height="42dp"
                android:layout_gravity="center"
                android:src="@drawable/moto_icon"/>

            <ImageView
                android:id="@+id/cloud1"
                android:layout_width="20dp"
                android:layout_height="20dp"
                android:layout_gravity="center"
                android:layout_toLeftOf="@id/moto_icon"
                android:src="@drawable/cloud"/>

            <ImageView
                android:id="@+id/cloud2"
                android:layout_width="12dp"
                android:layout_height="12dp"
                android:layout_gravity="center"
                android:layout_toLeftOf="@id/cloud1"
                android:src="@drawable/cloud"/>

            <ImageView
                android:id="@+id/cloud3"
                android:layout_width="16dp"
                android:layout_height="16dp"
                android:layout_gravity="center"
                android:layout_toLeftOf="@id/cloud2"
                android:src="@drawable/cloud"/>

        </RelativeLayout>

        <ImageView
            android:layout_width="240dp"
            android:layout_height="64dp"
            android:layout_gravity="center"
            android:src="@drawable/motorrad_logo" />

    </LinearLayout>

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

If I run the app in the emulator the 3 clouds does not show up. In the design tap I see just blue arrows.
 
Do you have some ideas on fixing the RelativeLayout or an alternative?
EDIT: What I want is this:

A:

try the following code: Replace your inner Linearlayout android:id="@+id/splashScreen"  with:
<LinearLayout
    android:id="@+id/splashScreen"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorPrimary"
    android:gravity="center"
    android:orientation="vertical"
    android:padding="5dp"
    android:visibility="visible">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp">

        <ImageView
            android:id="@+id/moto_icon"
            android:layout_width="56dp"
            android:layout_height="42dp"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:src="@mipmap/ic_launcher" />

        <ImageView
            android:id="@+id/cloud1"
            android:layout_width="20dp"
            android:layout_height="20dp"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:layout_toLeftOf="@id/moto_icon"
            android:src="@mipmap/ic_launcher" />

        <ImageView
            android:id="@+id/cloud2"
            android:layout_width="12dp"
            android:layout_height="12dp"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:layout_toLeftOf="@id/cloud1"
            android:src="@mipmap/ic_launcher" />

        <ImageView
            android:id="@+id/cloud3"
            android:layout_width="16dp"
            android:layout_height="16dp"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:layout_toLeftOf="@id/cloud2"
            android:src="@mipmap/ic_launcher" />

    </RelativeLayout>

    <ImageView
        android:layout_width="240dp"
        android:layout_height="64dp"
        android:layout_gravity="center"
        android:src="@mipmap/ic_launcher" />

</LinearLayout>

