Question

我想在点击按钮时打开地图但不幸的是我的应用程序强行关闭...这是我的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

这就是我调用地图活动的方式：

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

Answer 1

不知何故，您的设备或模拟器具有与编译器使用的com.google.android.maps.MapActivity不同的实现。在正常情况下这是不可能的。它表明您已经严重搞砸了构建过程，例如手动将地图附加JAR添加到构建路径，而不仅仅是设置启用地图的目标。

Answer 2

不太确定您的问题是否与可用库有关。

地图库不是标准Android库的一部分。因此，您需要在清单文件中声明它。

点击链接：http://developer.android.com/resources/tutorials/views/hello-mapview.html

由于库不可用，因此扩展MapActivity的Activity“GoogleMaps”不会加载到系统中。

Answer 3

使用MapActivity时获取致命异常java.lang.NoClassDefFoundError的所有问题和答案对我没有帮助。 CommonsWare的回复给了我一些提示，帮助我找到了解决方案。

当我将项目复制到新环境时，我的设置不包括Google地图库。我手动将maps.jar文件添加到我的项目中，并且能够成功链接应用程序但是当我尝试启动从MapActivity派生的活动时，我得到了致命的异常。

我删除了对maps.jar库的引用。然后我注意到我正在构建Android 2.2 SDK。我没有安装Google API SDK。下载并安装Google API SDK并将此SDK指定为目标后，我的问题就消失了。

MapView中的强制关闭错误

3 个答案: