Android出现错误：InflateException:Binary XML file

错误显示：在XML文件的第一行

<sunny.example.ahthreeview.TopBar xmlns:android="http://schemas.android.com/apk/res/android"xmlns:custom="http://schemas.android.com/apk/res-auto"android:id="@+id/topBar"android:layout_width="match_parent"android:layout_height="40dp"custom:leftBackground="@drawable/ic_launcher"custom:leftText="Back"custom:leftTextColor="#FFFFFF"custom:rightBackground="@drawable/ic_launcher"custom:rightText="More"custom:rightTextColor="#FFFFFF"custom:title="自定义标题"custom:titleTextColor="#123412"custom:titleTextSize="15sp">
</sunny.example.ahthreeview.TopBar>

包名应该是上面所示，写成了Topbar