java - 在包 'paddingEnd' 中找不到属性 'android' 的资源标识符

Question

我对 v17/mr-media_route_list_item.xml 中的 XMl 文件有疑问。

我一直收到这个错误，但还没有找到解决方案!

这是一个printshot XML 和问题*

XML 代码如下:

    <?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2013 The Android Open Source Project

     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"
              android:layout_width="match_parent"
              android:layout_height="?android:attr/listPreferredItemHeight"
              android:gravity="center_vertical">

    <LinearLayout android:layout_width="0dp"
                  android:layout_height="match_parent"
                  android:layout_weight="1"
                  android:orientation="vertical"
                  android:gravity="start|center_vertical"
                  android:paddingStart="?android:attr/listPreferredItemPaddingStart"
                  android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
                  android:duplicateParentState="true">

        <TextView android:id="@android:id/text1"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content"
                  android:singleLine="true"
                  android:ellipsize="marquee"
                  android:textAppearance="?android:attr/textAppearanceMedium"
                  android:duplicateParentState="true" />

        <TextView android:id="@android:id/text2"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content"
                  android:singleLine="true"
                  android:ellipsize="marquee"
                  android:textAppearance="?android:attr/textAppearanceSmall"
                  android:duplicateParentState="true" />
    </LinearLayout>

</LinearLayout>

Answer 1

android:paddingStart 和 android:paddingEnd 已添加到 API 级别 17。您的构建目标(例如，Project > Properties > Android in Eclipse)需要是 API 17 级或以上才能被认可。