java.lang.ClassNotFoundException on my android app but I have no idea why -

i've been trying started android programming while now. i'm .net developer no java experience 8 years (university).

i can compile , run samples no problem moment try , rename package/class fails. believe i've updated manifest , triple checked (copied , pasted name, selected eclipse) yet fails java.lang.classnotfoundexception:

 12-02 09:12:21.088: error/androidruntime(233): uncaught handler: thread main exiting due uncaught exception 12-02 09:12:21.178: error/androidruntime(233): java.lang.runtimeexception: unable instantiate activity componentinfo{org.anddev.cheesemp.helloandworld/org.anddev.cheesemp.helloandworld.helloandengine}: java.lang.classnotfoundexception: org.anddev.cheesemp.helloandworld.helloandengine in loader dalvik.system.pathclassloader@43d0c0d0 12-02 09:12:21.178: error/androidruntime(233):     @ android.app.activitythread.performlaunchactivity(activitythread.java:2417) 12-02 09:12:21.178: error/androidruntime(233):     @ android.app.activitythread.handlelaunchactivity(activitythread.java:2512) 12-02 09:12:21.178: error/androidruntime(233):     @ android.app.activitythread.access$2200(activitythread.java:119) 12-02 09:12:21.178: error/androidruntime(233):     @ android.app.activitythread$h.handlemessage(activitythread.java:1863) 12-02 09:12:21.178: error/androidruntime(233):     @ android.os.handler.dispatchmessage(handler.java:99) 12-02 09:12:21.178: error/androidruntime(233):     @ android.os.looper.loop(looper.java:123) 12-02 09:12:21.178: error/androidruntime(233):     @ android.app.activitythread.main(activitythread.java:4363) 12-02 09:12:21.178: error/androidruntime(233):     @ java.lang.reflect.method.invokenative(native method) 12-02 09:12:21.178: error/androidruntime(233):     @ java.lang.reflect.method.invoke(method.java:521) 12-02 09:12:21.178: error/androidruntime(233):     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:860) 12-02 09:12:21.178: error/androidruntime(233):     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:618) 12-02 09:12:21.178: error/androidruntime(233):     @ dalvik.system.nativestart.main(native method) 12-02 09:12:21.178: error/androidruntime(233): caused by: java.lang.classnotfoundexception: org.anddev.cheesemp.helloandworld.helloandengine in loader dalvik.system.pathclassloader@43d0c0d0 12-02 09:12:21.178: error/androidruntime(233):     @ dalvik.system.pathclassloader.findclass(pathclassloader.java:243) 12-02 09:12:21.178: error/androidruntime(233):     @ java.lang.classloader.loadclass(classloader.java:573) 12-02 09:12:21.178: error/androidruntime(233):     @ java.lang.classloader.loadclass(classloader.java:532) 12-02 09:12:21.178: error/androidruntime(233):     @ android.app.instrumentation.newactivity(instrumentation.java:1021) 12-02 09:12:21.178: error/androidruntime(233):     @ android.app.activitythread.performlaunchactivity(activitythread.java:2409) 12-02 09:12:21.178: error/androidruntime(233):     ... 11 more  

manifest here:

 <?xml version="1.0" encoding="utf-8"?> 
    <manifest xmlns:android="http://schemas.android.com/apk/res/android" 
          android:versioncode="1" 
          android:versionname="1.0" package="org.anddev.cheesemp.helloandworld"> 
          <uses-permission android:name="android.permission.wake_lock"/> 
        <application android:icon="@drawable/icon" android:label="@string/app_name"> 
            <activity android:label="@string/app_name" android:name="org.anddev.cheesemp.helloandworld.helloandengine"> 
                <intent-filter> 
                    <action android:name="android.intent.action.main" /> 
                    <category android:name="android.intent.category.launcher" /> 
                </intent-filter> 
            </activity> 
        </application> 
        <uses-sdk android:minsdkversion="4" \> 
    </manifest> 
 

class definition here:

 package org.anddev.cheesemp.helloandworld;  import org.anddev.andengine.engine.engine; import org.anddev.andengine.engine.camera.camera; import org.anddev.andengine.engine.options.engineoptions; import org.anddev.andengine.engine.options.engineoptions.screenorientation; import org.anddev.andengine.engine.options.resolutionpolicy.ratioresolutionpolicy; import org.anddev.andengine.entity.scene.scene; import org.anddev.andengine.entity.scene.background.colorbackground; import org.anddev.andengine.entity.text.text; import org.anddev.andengine.entity.util.fpslogger; import org.anddev.andengine.opengl.font.font; import org.anddev.andengine.opengl.texture.texture; import org.anddev.andengine.opengl.texture.textureoptions; import org.anddev.andengine.ui.activity.basegameactivity; import org.anddev.andengine.util.horizontalalign;  import android.graphics.color; import android.graphics.typeface;  /**  * @author nicolas gramlich  * @since 11:54:51 - 03.04.2010  */ public class helloandengine extends basegameactivity 

this sample andengine i've had same issue every sample modify. can't feel i've missed , nothing found searching has helped.

any advice appreciated!

try this.

<activity android:label="@string/app_name" android:name=".helloandengine"> 

you don't need qualified class name. also, if working eclipse , rename package go project → clean , let clean project, fixing references , on if broken.