Question

我从here下载了android demo newsreader项目，并使用Import＆gt;将其导入eclipse;现有项目进入工作区。我还将android-support-v4.jar添加到构建路径，就像它说here

一样

我遇到的问题与访问资源有关。这是我得到的错误。

Description Resource    Path    Location    Type
ReaderTutorial/src/com/example/android/newsreader   line 143    Java Problem
android.app.ActionBar cannot be resolved to a variable  NewsReaderActivity.java     /NewsReaderTutorial/src/com/example/android/newsreader  line 151    Java Problem
error: Error retrieving parent for item: No resource found that matches the given name 'android:style/Widget.Holo.Light.ActionBar.TabView'. style.xml   /NewsReaderTutorial/res/values-v11  line 23 Android AAPT Problem
error: Error retrieving parent for item: No resource found that matches the given name 'android:Theme.Holo.Light.NoActionBar'.  style.xml   /NewsReaderTutorial/res/values-v11  line 33 Android AAPT Problem
error: Error retrieving parent for item: No resource found that matches the given name 'android:Theme.Holo.Light'.  style.xml   /NewsReaderTutorial/res/values-v11  line 28 Android AAPT Problem
error: Error: No resource found that matches the given name: attr 'android:actionBarTabStyle'.  style.xml   /NewsReaderTutorial/res/values-v11  line 30 Android AAPT Problem
error: Error: No resource found that matches the given name: attr 'android:actionBarTabTextStyle'.  style.xml   /NewsReaderTutorial/res/values-v11  line 29 Android AAPT Problem
FragmentTransaction cannot be resolved to a type    CompatActionBarNavHandler.java  /NewsReaderTutorial/src/com/example/android/newsreader  line 54 Java Problem
FragmentTransaction cannot be resolved to a type    CompatActionBarNavHandler.java  /NewsReaderTutorial/src/com/example/android/newsreader  line 76 Java Problem
FragmentTransaction cannot be resolved to a type    CompatActionBarNavHandler.java  /NewsReaderTutorial/src/com/example/android/newsreader  line 84 Java Problem
OnNavigationListener cannot be resolved to a type   CompatActionBarNavHandler.java  /NewsReaderTutorial/src/com/example/android/newsreader  line 35 Java Problem
R cannot be resolved to a variable  ArticleActivity.java    /NewsReaderTutorial/src/com/example/android/newsreader  line 51 Java Problem
R cannot be resolved to a variable  HeadlinesFragment.java  /NewsReaderTutorial/src/com/example/android/newsreader  line 75 Java Problem
R cannot be resolved to a variable  NewsReaderActivity.java /NewsReaderTutorial/src/com/example/android/newsreader  line 76 Java Problem
R cannot be resolved to a variable  NewsReaderActivity.java /NewsReaderTutorial/src/com/example/android/newsreader  line 80 Java Problem
R cannot be resolved to a variable  NewsReaderActivity.java /NewsReaderTutorial/src/com/example/android/newsreader  line 82 Java Problem
R cannot be resolved to a variable  NewsReaderActivity.java /NewsReaderTutorial/src/com/example/android/newsreader  line 86 Java Problem
R cannot be resolved to a variable  NewsReaderActivity.java /NewsReaderTutorial/src/com/example/android/newsreader  line 101    Java Problem
R cannot be resolved to a variable  NewsReaderActivity.java /NewsReaderTutorial/src/com/example/android/newsreader  line 152    Java Problem
R cannot be resolved to a variable  NewsReaderActivity.java /NewsReaderTutorial/src/com/example/android/newsreader  line 183    Java Problem
Tab cannot be resolved to a type    CompatActionBarNavHandler.java  /NewsReaderTutorial/src/com/example/android/newsreader  line 54 Java Problem
Tab cannot be resolved to a type    CompatActionBarNavHandler.java  /NewsReaderTutorial/src/com/example/android/newsreader  line 76 Java Problem
Tab cannot be resolved to a type    CompatActionBarNavHandler.java  /NewsReaderTutorial/src/com/example/android/newsreader  line 84 Java Problem
TabListener cannot be resolved to a type    CompatActionBarNavHandler.java  /NewsReaderTutorial/src/com/example/android/newsreader  line 35 Java Problem
The import android.app.ActionBar cannot be resolved CompatActionBarNavHandler.java  /NewsReaderTutorial/src/com/example/android/newsreader  line 19 Java Problem
The import android.app.ActionBar cannot be resolved CompatActionBarNavHandler.java  /NewsReaderTutorial/src/com/example/android/newsreader  line 20 Java Problem
The import android.app.ActionBar cannot be resolved CompatActionBarNavHandler.java  /NewsReaderTutorial/src/com/example/android/newsreader  line 21 Java Problem
The import android.app.FragmentTransaction cannot be resolved   CompatActionBarNavHandler.java  /NewsReaderTutorial/src/com/example/android/newsreader  line 22 Java Problem
The method getActionBar() is undefined for the type NewsReaderActivity  NewsReaderActivity.java /NewsReaderTutorial/src/com/example/android/newsreader  line 137    Java Problem
The method onNavigationItemSelected(int, long) of type CompatActionBarNavHandler must override or implement a supertype method  CompatActionBarNavHandler.java  /NewsReaderTutorial/src/com/example/android/newsreader  line 65 Java Problem

我知道这不是很多，但我一直在寻找并找不到任何新的演示。

我认为可能是因为我在gen目录中找不到它而没有生成R.java文件。我试过清理项目并重新启动eclipse，但它们没有用。

任何帮助都会很棒。

迪斯科

Answer 1

已经有一段时间了，但这解决了我的问题你导入了吗？

import android.app.ActionBar;

由于某种原因，我的项目有：

import android.app.ActionBar.Tab;
import android.app.ActionBar.TabListener;

import android.app.ActionBar;它有效。

Answer 2

您需要将构建目标更改为API级别11或更高级别。

Answer 3

您需要单击Android Manifest.xml文件下的项目属性文件，并将目标从8更改为目标13或更高版本。

Android NewsReader演示项目问题

3 个答案: