Bottom Toolbar looks like moving when switching from activity to activity

Question

I am trying to have a bottom Toolbar. In 3 activities having the below same code

<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar_bottom"
    android:layout_width="match_parent"
    android:layout_height="40dp"
    android:background="@android:color/white"
    android:layout_alignParentBottom="true"
    android:minHeight="?attr/actionBarSize" >
<LinearLayout
    android:id="@+id/toolbarmenucontainer"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/home"
        android:layout_width="70dp"
        android:layout_height="wrap_content"
        android:background="@android:color/white"
        android:src="@drawable/home"/>

    <ImageView
        android:id="@+id/news"
        android:layout_width="70dp"
        android:layout_height="wrap_content"
        android:background="@android:color/white"
        android:src="@drawable/news"/>
    <ImageView
        android:id="@+id/upload"
        android:layout_width="70dp"
        android:layout_height="wrap_content"
        android:background="@android:color/white"
        android:onClick="AddImage"
        android:src="@drawable/upload"/>
    <ImageView
        android:id="@+id/search"
        android:layout_width="70dp"
        android:layout_height="wrap_content"
        android:background="@android:color/white"
        android:src="@drawable/search"/>
    <ImageView
        android:id="@+id/useraccount"
        android:layout_width="70dp"
        android:layout_height="wrap_content"
        android:background="@android:color/white"
        android:src="@drawable/user"/>
</LinearLayout>

</android.support.v7.widget.Toolbar>

But every time I switch from activity to another it show like its moving. Is there a better way to have a bottom Toolbar?