Invalid Layout (EditText)

It says that my EditTexts are invalid. I don't know what is wrong with it but more specific it says that android:id is invalid.

<RelativeLayout xmlns:android="http://ift.tt/nIICcg"
    xmlns:tools="http://ift.tt/LrGmb4"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".SettingsActivity="20sp"
        android:text="Testapp" />
     <EditText
        android:id="@+id/host" 
        android:layout_width="fill_parent" 
        android:gravity="center_horizontal" 
        android:layout_height="wrap_content" 
        android:layout_below="@+id/text_view_header" 
        android:inputType="textNoSuggestions" 
        android:hint="@string/host" /> 
     <EditText
        android:id="@+id/host2" 
        android:layout_width="fill_parent"  
        android:gravity="center_horizontal" 
        android:layout_height="wrap_content" 
        android:layout_below="@+id/spyhost" 
        android:inputType="textNoSuggestions" 
        android:hint="@string/host2" />
     <Button
        android:id="@+id/save"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:layout_below="@+id/vidhost"
        android:text="Save Settings"
        android:onClick="onClickSave" />
</RelativeLayout>