title: runtime exception cant run app in emulator
body: <p>I can not run my app in emulator.</p>
  
  <p>my androidManifest.xml file is</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="ch.adiuvaris.enigma"android:versionCode="1" android:versionName="1.0" &gt;
  &lt;uses-sdk android:minSdkVersion="8" /&gt;
  &lt;application android:icon="@drawable/icon" android:label="@string/appName" &gt;
      &lt;activity   android:label="@string/appName" android:name=".EnigmaPuzzle" &gt;
          &lt;intent-filter &gt;
              &lt;action android:name="android.intent.action.MAIN" /&gt;
           &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
          &lt;/intent-filter&gt;
      &lt;/activity&gt;
      &lt;activity android:label="Enigma Settings android:name=".GamePrefs" &gt;
      &lt;/activity&gt;
      &lt;activity android:label="Enigma Help" android:name=".GameHelp" &gt;
      &lt;/activity&gt;
      &lt;supports-screens android:anyDensity="true" android:largeScreens="true" android:normalScreens="true" android:resizeable="true" android:smallScreens="true"&gt;
      &lt;/supports-screens&gt;
      &lt;/application&gt;
      &lt;/manifest&gt;'}
  </code></pre>
  
  <p>and I am getting following error in logcat</p>
  
  <blockquote>
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224): FATAL EXCEPTION: main</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.engime/com.example.engime.EnigmaPuzzle}: java.lang.ClassNotFoundException: com.example.engime.EnigmaPuzzle in loader dalvik.system.PathClassLoader[/data/app/com.example.engime-1.apk]</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1569)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at android.app.ActivityThread.access$1500(ActivityThread.java:117)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at android.os.Handler.dispatchMessage(Handler.java:99)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at android.os.Looper.loop(Looper.java:123)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at android.app.ActivityThread.main
    (ActivityThread.java:3683)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at java.lang.reflect.Method.invokeNative(Native Method)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at java.lang.reflect.Method.invoke(Method.java:507)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):atcom.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at dalvik.system.NativeStart.main(Native Method)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224): Caused by: java.lang.ClassNotFoundException: com.example.engime.EnigmaPuzzle in loader dalvik.system.PathClassLoader[/data/app/com.example.engime-1.apk]</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at java.lang.ClassLoader.loadClass(ClassLoader.java:551)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at java.lang.ClassLoader.loadClass(ClassLoader.java:511)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at android.app.Instrumentation.newActivity(Instrumentation.java:1021)</p>
    
    <p>01-24 22:42:14.741: ERROR/AndroidRuntime(1224):at android.app.ActivityThread.performLaunchActivity</p>
  </blockquote>