又是意外停止，我把log贴出来

07-15 01:47:43.365: W/dalvikvm(219): Unable to resolve superclass of Lwalker2/map/Walker2Activity; (16)
07-15 01:47:43.365: W/dalvikvm(219): Link of class 'Lwalker2/map/Walker2Activity;' failed
07-15 01:47:43.395: D/AndroidRuntime(219): Shutting down VM
07-15 01:47:43.395: W/dalvikvm(219): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
07-15 01:47:43.395: E/AndroidRuntime(219): Uncaught handler: thread main exiting due to uncaught exception
07-15 01:47:43.455: E/AndroidRuntime(219): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{walker2.map/walker2.map.Walker2Activity}: java.lang.ClassNotFoundException: walker2.map.Walker2Activity in loader dalvik.system.PathClassLoader@44e39748
07-15 01:47:43.455: E/AndroidRuntime(219):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2417)
07-15 01:47:43.455: E/AndroidRuntime(219):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
07-15 01:47:43.455: E/AndroidRuntime(219):  at android.app.ActivityThread.access$2200(ActivityThread.java:119)
07-15 01:47:43.455: E/AndroidRuntime(219):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
07-15 01:47:43.455: E/AndroidRuntime(219):  at android.os.Handler.dispatchMessage(Handler.java:99)
07-15 01:47:43.455: E/AndroidRuntime(219):  at android.os.Looper.loop(Looper.java:123)
07-15 01:47:43.455: E/AndroidRuntime(219):  at android.app.ActivityThread.main(ActivityThread.java:4363)
07-15 01:47:43.455: E/AndroidRuntime(219):  at java.lang.reflect.Method.invokeNative(Native Method)
07-15 01:47:43.455: E/AndroidRuntime(219):  at java.lang.reflect.Method.invoke(Method.java:521)
07-15 01:47:43.455: E/AndroidRuntime(219):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
07-15 01:47:43.455: E/AndroidRuntime(219):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
07-15 01:47:43.455: E/AndroidRuntime(219):  at dalvik.system.NativeStart.main(Native Method)
07-15 01:47:43.455: E/AndroidRuntime(219): Caused by: java.lang.ClassNotFoundException: walker2.map.Walker2Activity in loader dalvik.system.PathClassLoader@44e39748
07-15 01:47:43.455: E/AndroidRuntime(219):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
07-15 01:47:43.455: E/AndroidRuntime(219):  at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
07-15 01:47:43.455: E/AndroidRuntime(219):  at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
07-15 01:47:43.455: E/AndroidRuntime(219):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
07-15 01:47:43.455: E/AndroidRuntime(219):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2409)
07-15 01:47:43.455: E/AndroidRuntime(219):  ... 11 more
07-15 01:47:43.548: I/dalvikvm(219): threadid=7: reacting to signal 3
07-15 01:47:43.548: E/dalvikvm(219): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
07-15 01:48:33.534: W/dalvikvm(265): Unable to resolve superclass of Lwalker2/map/Walker2Activity; (16)
07-15 01:48:33.534: W/dalvikvm(265): Link of class 'Lwalker2/map/Walker2Activity;' failed
07-15 01:48:33.575: D/AndroidRuntime(265): Shutting down VM
07-15 01:48:33.575: W/dalvikvm(265): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
07-15 01:48:33.575: E/AndroidRuntime(265): Uncaught handler: thread main exiting due to uncaught exception
07-15 01:48:33.664: E/AndroidRuntime(265): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{walker2.map/walker2.map.Walker2Activity}: java.lang.ClassNotFoundException: walker2.map.Walker2Activity in loader dalvik.system.PathClassLoader@44e39748
07-15 01:48:33.664: E/AndroidRuntime(265):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2417)
07-15 01:48:33.664: E/AndroidRuntime(265):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
07-15 01:48:33.664: E/AndroidRuntime(265):  at android.app.ActivityThread.access$2200(ActivityThread.java:119)
07-15 01:48:33.664: E/AndroidRuntime(265):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
07-15 01:48:33.664: E/AndroidRuntime(265):  at android.os.Handler.dispatchMessage(Handler.java:99)
07-15 01:48:33.664: E/AndroidRuntime(265):  at android.os.Looper.loop(Looper.java:123)
07-15 01:48:33.664: E/AndroidRuntime(265):  at android.app.ActivityThread.main(ActivityThread.java:4363)
07-15 01:48:33.664: E/AndroidRuntime(265):  at java.lang.reflect.Method.invokeNative(Native Method)
07-15 01:48:33.664: E/AndroidRuntime(265):  at java.lang.reflect.Method.invoke(Method.java:521)
07-15 01:48:33.664: E/AndroidRuntime(265):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
07-15 01:48:33.664: E/AndroidRuntime(265):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
07-15 01:48:33.664: E/AndroidRuntime(265):  at dalvik.system.NativeStart.main(Native Method)
还有，哪位大神能教教我如何看错误日志啊……根本看不懂啊……