在尝试在模拟器上运行项目时，我一直收到classnotfoundexception。在发布此问题之前，我已经在这里查看过，我已经尝试将库添加到构建路径，清理/构建项目但仍然没有解决问题。
该项目是使用开源日历项目构建的。所以这个名字很奇怪，但对构建没有任何影响。
这是LogCat：
09-03 12:37:36.990: E/Trace(2272): error opening trace file: No such file or directory (2)
09-03 12:37:37.439: W/dalvikvm(2272): Unable to resolve superclass of Lcom/squareup/timessquare/sample/DashboardActivity; (453)
09-03 12:37:37.482: W/dalvikvm(2272): Link of class 'Lcom/squareup/timessquare/sample/DashboardActivity;' failed
09-03 12:37:37.482: D/AndroidRuntime(2272): Shutting down VM
09-03 12:37:37.482: W/dalvikvm(2272): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
09-03 12:37:37.540: E/AndroidRuntime(2272): FATAL EXCEPTION: main
09-03 12:37:37.540: E/AndroidRuntime(2272): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.squareup.timessquare.sample/com.squareup.timessquare.sample.DashboardActivity}: java.lang.ClassNotFoundException: com.squareup.timessquare.sample.DashboardActivity
09-03 12:37:37.540: E/AndroidRuntime(2272): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1983)
09-03 12:37:37.540: E/AndroidRuntime(2272): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
09-03 12:37:37.540: E/AndroidRuntime(2272): at android.app.ActivityThread.access$600(ActivityThread.java:130)
09-03 12:37:37.540: E/AndroidRuntime(2272): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
09-03 12:37:37.540: E/AndroidRuntime(2272): at android.os.Handler.dispatchMessage(Handler.java:99)
09-03 12:37:37.540: E/AndroidRuntime(2272): at android.os.Looper.loop(Looper.java:137)
09-03 12:37:37.540: E/AndroidRuntime(2272): at android.app.ActivityThread.main(ActivityThread.java:4745)
09-03 12:37:37.540: E/AndroidRuntime(2272): at java.lang.reflect.Method.invokeNative(Native Method)
09-03 12:37:37.540: E/AndroidRuntime(2272): at java.lang.reflect.Method.invoke(Method.java:511)
09-03 12:37:37.540: E/AndroidRuntime(2272): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
09-03 12:37:37.540: E/AndroidRuntime(2272): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-03 12:37:37.540: E/AndroidRuntime(2272): at dalvik.system.NativeStart.main(Native Method)
09-03 12:37:37.540: E/AndroidRuntime(2272): Caused by: java.lang.ClassNotFoundException: com.squareup.timessquare.sample.DashboardActivity
09-03 12:37:37.540: E/AndroidRuntime(2272): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
09-03 12:37:37.540: E/AndroidRuntime(2272): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
09-03 12:37:37.540: E/AndroidRuntime(2272): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
09-03 12:37:37.540: E/AndroidRuntime(2272): at android.app.Instrumentation.newActivity(Instrumentation.java:1053)
09-03 12:37:37.540: E/AndroidRuntime(2272): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1974)
这里是清单中声明的类：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.squareup.timessquare.sample"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk
android:minSdkVersion="7"
android:targetSdkVersion="17" />
<application
android:label="@string/app_name"
android:icon="@drawable/supporticon"
android:debuggable="true"
android:supportsRtl="true">
<activity
android:name=".DashboardActivity"
android:label="@string/app_name"
android:configChanges="orientation|screenSize|keyboardHidden"
>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
这是课堂内容：
public class DashboardActivity extends SherlockFragmentActivity {
ActionBar mActionBar;
ViewPager mPager;
Tab tab;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dashboard);
// Activate the navigation mode tabs
mActionBar = getSupportActionBar();
mActionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Locate the view pager in dashboard.xml
mPager = (ViewPager) findViewById(R.id.pager);
// Activate the fragment manager
FragmentManager fm = getSupportFragmentManager();
// Capture view pager swipes
ViewPager.SimpleOnPageChangeListener ViewPagerListener = new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
super.onPageSelected(position);
// Find the view pager position
mActionBar.setSelectedNavigationItem(position);
}
};
mPager.setOnPageChangeListener(ViewPagerListener);
// Locate the adapter class
ViewPagerAdapter viewpageradapter = new ViewPagerAdapter(fm);
// Set the view pager adapter in ViewPager
mPager.setAdapter(viewpageradapter);
// Capture the button clicks
ActionBar.TabListener tabListener = new ActionBar.TabListener() {
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// Pass the position on tab click to view pager
mPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
};
// Create the first tab
tab = mActionBar.newTab().setText("Support Tab")
.setTabListener(tabListener);
mActionBar.addTab(tab);
// Create the second tab
tab = mActionBar.newTab().setText("Students Tab")
.setTabListener(tabListener);
mActionBar.addTab(tab);
}
}
我能想到的唯一问题是当我右键点击我的项目＆gt;项目属性＆gt; Android的actionbarsherlock引用旁边有一个红叉。即使我的课程中没有错误，我已经使用过该库，但我不确定这是否与它有任何关系。
任何帮助将不胜感激，谢谢。
答案 0 :(得分：0)
我能想到的唯一问题是当我右键点击我的时候 项目＆gt;项目属性＆gt; Android的actionbarsherlock参考 旁边有一个红十字。即使我没有错误 我使用过这个库的课程，我不确定这有什么用 与它有关。
是的，这肯定与它有关。这意味着您的项目找不到jar文件或lib项目的位置。
在项目属性页面中的该条目上，按下编辑按钮并再次导航到jar文件/ lib项目文件夹。只有当红色x变为绿色检查时，您才能正确运行程序。