R无法解析为变量,XML问题?

我打开了我的旧项目,几个月前它运行正常。 现在,我几乎在每个活动中都有eclipse错误或与错误有关的东西- R cannot be resolved to a variable .

我在stackoverflow上做了所有准备好的动作,但还没有奏效:

• 已检查导入
• 项目已清理

我认为问题可能出现在其中一个XML文件中,该文件还包含3个错误,如 No resource identifier found for attribute "atribute" in package my.package

在这个活动中,我使用了一个facebook样本来分享内容。 代码:

<?xml version="1.0" encoding="utf-8"?>
<!--
    Copyright 2010-present Facebook.

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
-->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              xmlns:facebook="http://schemas.android.com/apk/res-auto"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:background="#FFF"
        >
    <LinearLayout android:orientation="vertical"
                  android:layout_width="fill_parent"
                  android:layout_height="fill_parent"
                  android:background="#FFF"
                  android:id="@+id/activity_share_ui_container">
        <com.facebook.widget.LoginButton   <!-- 2 errors here --->
                android:id="@+id/login_button"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="5dp"
                facebook:confirm_logout="false"
                facebook:fetch_user_info="true"
                />
        <LinearLayout
                android:layout_width="150dp"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:gravity="center_horizontal"
                android:orientation="vertical">
            <TextView
                    android:id="@+id/greeting"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginLeft="10dp"
                    android:layout_gravity="center"
                    android:textColor="#333"
                    android:textSize="18sp"/>
            <com.facebook.widget.ProfilePictureView <!-- 1 error here --->
                    android:id="@+id/profilePicture"
                    android:layout_height="wrap_content"
                    android:layout_width="wrap_content"
                    android:gravity="center_horizontal"
                    android:layout_marginBottom="10dp"
                    facebook:preset_size="normal"/>
            <Button
                    android:id="@+id/postStatusUpdateButton"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:text="Post Status Update"
                    />
            <Button
                    android:id="@+id/postPhotoButton"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:text="Post Photo"
                    />
            <Button
                    android:id="@+id/pickFriendsButton"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:text="Pick Some Friends"
                    />
            <Button
                    android:id="@+id/pickPlaceButton"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:text="Pick Place"
                    />
        </LinearLayout>
    </LinearLayout>
    <FrameLayout
            android:id="@+id/fragment_container"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"/>

</LinearLayout>

财产有问题:

我错过了什么?