Force Down error in MapView

Issue

i want to open a map when i click a button but unfortunately my app forces down...this is my logcat:

01-31 18:11:49.465: VERBOSE/InputDevice(2836): ID[0]=0(0) Up(1=>0)
01-31 18:11:49.606: WARN/dalvikvm(6111): Class resolved by unexpected DEX: Lkostas/menu/olympiakos/GoogleMaps;(0x486356d8):0x22f5d8 ref [Lcom/google/android/maps/MapActivity;] Lcom/google/android/maps/MapActivity;(0x486356d8):0x21dca0
01-31 18:11:49.606: WARN/dalvikvm(6111): (Lkostas/menu/olympiakos/GoogleMaps; had used a different Lcom/google/android/maps/MapActivity; during pre-verification)
01-31 18:11:49.606: WARN/dalvikvm(6111): Unable to resolve superclass of Lkostas/menu/olympiakos/GoogleMaps; (67)
01-31 18:11:49.606: WARN/dalvikvm(6111): Link of class 'Lkostas/menu/olympiakos/GoogleMaps;' failed
01-31 18:11:49.610: DEBUG/AndroidRuntime(6111): Shutting down VM
01-31 18:11:49.610: WARN/dalvikvm(6111): threadid=1: thread exiting with uncaught exception (group=0x4001d7d0)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111): FATAL EXCEPTION: main
01-31 18:11:49.641: ERROR/AndroidRuntime(6111): java.lang.NoClassDefFoundError: kostas.menu.olympiakos.GoogleMaps
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at kostas.menu.olympiakos.DialogActivity$1.onItemClick(DialogActivity.java:47)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at android.widget.AdapterView.performItemClick(AdapterView.java:284)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at android.widget.ListView.performItemClick(ListView.java:3672)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at android.widget.AbsListView$PerformClick.run(AbsListView.java:1812)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at android.os.Handler.handleCallback(Handler.java:587)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at android.os.Handler.dispatchMessage(Handler.java:92)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at android.os.Looper.loop(Looper.java:123)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at android.app.ActivityThread.main(ActivityThread.java:4627)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at java.lang.reflect.Method.invokeNative(Native Method)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at java.lang.reflect.Method.invoke(Method.java:521)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at dalvik.system.NativeStart.main(Native Method)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111): Caused by: java.lang.IllegalAccessError: Class ref in pre-verified class resolved to unexpected implementation
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at dalvik.system.DexFile.defineClass(Native Method)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at dalvik.system.DexFile.loadClassBinaryName(DexFile.java:209)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:203)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
01-31 18:11:49.641: ERROR/AndroidRuntime(6111):     ... 13 more
01-31 18:11:49.660: WARN/ActivityManager(2836):   Force finishing activity kostas.menu.olympiakos/.DialogActivity

thats the way i m calling the map activity:

Intent newActivity111 = new Intent(DialogActivity.this, GoogleMaps.class);     
                                startActivity(newActivity111);

Solution

Somehow, your device or emulator has a different implementation of com.google.android.maps.MapActivity than what your compiler used. That should not be possible under normal circumstances. It suggests that you have seriously messed up your build process, such as manually adding the Maps add-on JAR to your build path rather than just setting a Maps-enabled target.

Answered By - CommonsWare