<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:custom="http://schemas.android.com/apk/res/com.example.topbardemo1"

     xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent" 

    android:padding="5dp"

    tools:context=".MainActivity">

<com.example.topbardemo1.TopBar

    andriod:id="@+id/topBar"

    android:layout_width="match_parent"

    android:layout_height="40dp"

     custom:leftBackground="@drawable/blue_button"

        custom:leftText="Back"

        custom:leftTextColor="#FFFFFF"

        custom:rightBackground="@drawable/blue_button"

         custom:rightText="More"

        custom:rightTextColor="#FFFFFF"

        custon:title="Title"

        custom:titleTextColor="#123412"

        custom:titleTextSize="10sp"

    ></com.example.topbardemo1.TopBar>

</RelativeLayout>

一直在<com.example.topbardemo1.TopBar  这行提示error: Error parsing XML: unbound prefix，但是路径我没写错啊，我用的eclipse