NavigationView给出了一些错误(NavigationView gives some errors)

我尝试为我的应用程序创建一个NavigationView ，如下所示：

<android.support.v4.widget.DrawerLayout android:id="@+id/drawer_layout" xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true">

<android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="@dimen/abc_action_bar_default_height_material" android:background="?attr/colorPrimary" android:minHeight="?attr/actionBarSize" android:theme="@style/AppTheme.Toolbar"/>  <FrameLayout android:id="@+id/content" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1"/>

<android.support.design.widget.NavigationView android:id="@+id/navigation" android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_gravity="start" android:background="@android:color/background_dark" app:headerLayout="@layout/drawer_header" app:itemIconTint="@android:color/background_light" app:itemTextColor="@android:color/background_dark" app:menu="@menu/drawer"/> </android.support.v4.widget.DrawerLayout>

但是当它查找headerLayout时，它会向我headerLayout几个错误（ drawer_header布局存在，也就是drawer xml）。

它说：

找不到包'xxx.xxx'中属性'headerLayout'的资源标识符

两种XML都存在，所以我不知道我做错了什么......

我正在使用Eclpse上的API 21进行编译。

为什么会发生这种错误？

编辑：请，我需要帮助...我仍然无法编译这个...我上传我的代码到Dropbox给任何可能想帮助我的人...仍然发现问题！

我试图添加appcompatv7库，但他们给我错误...现在我的项目不起作用...请帮忙！

链接到Dropbox这里

I tried to create a NavigationView for my application like this:

<android.support.v4.widget.DrawerLayout android:id="@+id/drawer_layout" xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true">

<android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="@dimen/abc_action_bar_default_height_material" android:background="?attr/colorPrimary" android:minHeight="?attr/actionBarSize" android:theme="@style/AppTheme.Toolbar"/>  <FrameLayout android:id="@+id/content" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1"/>

<android.support.design.widget.NavigationView android:id="@+id/navigation" android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_gravity="start" android:background="@android:color/background_dark" app:headerLayout="@layout/drawer_header" app:itemIconTint="@android:color/background_light" app:itemTextColor="@android:color/background_dark" app:menu="@menu/drawer"/> </android.support.v4.widget.DrawerLayout>

But then it launches me several errors when looking for headerLayout (the drawer_header layout exists, also the drawer xml).

It says:

No resource identifier found for attribute 'headerLayout' in package 'xxx.xxx'

Both XML exist, so I don't know what I'm doing wrong...

I'm compiling using API 21 on Eclpse.

Why is this error happening??

EDIT: PLEASE, I need help... I still can't compile this... I uploaded my code to Dropbox to anybody who may want to help me... Still finding problems!

I've tried to add appcompatv7 libraries, but they give me errors... And now my project doesn't work... Please help!

Link to Dropbox here