Eclipse中Android开发，代码未报错，但是用虚拟机或者手机都是“很抱歉，***已停止运行”

eclipse android开发虚拟机手机下面是log 12-08 13:47:09.351: E/Trace(1590): error opening trace file: No such file or directory (2) 12-08 13:47:09.351: W/Trace(1590): Unexpected value from nativeGetEnabledTags: 0 12-08 13:47:09.351: W/Trace(1590): Unexpected value from nativeGetEnabledTags: 0 12-08 13:47:09.351: W/Trace(1590): Unexpected value from nativeGetEnabledTags: 0 12-08 13:47:09.381: W/ActivityThread(1590): Application com.example.b is waiting for the debugger on port 8100… 12-08 13:47:11.902: W/Trace(1590): Unexpected value from nativeGetEnabledTags: 0 12-08 13:47:11.912: W/Trace(1590): Unexpected value from nativeGetEnabledTags: 0 12-08 13:47:11.962: W/dalvikvm(1590): threadid=1: thread exiting with uncaught exception (group=0xb5d7d908) 12-08 13:47:12.301: E/AndroidRuntime(1590): FATAL EXCEPTION: main 12-08 13:47:12.301: E/AndroidRuntime(1590): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.b/com.example.b.MainActivity}: java.lang.ClassNotFoundException: Didn””t find class “com.example.b.MainActivity” on path: /data/app/com.example.b-1.apk 12-08 13:47:12.301: E/AndroidRuntime(1590): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2106) 12-08 13:47:12.301: E/AndroidRuntime(1590): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 12-08 13:47:12.301: E/AndroidRuntime(1590): at android.app.ActivityThread.access$600(ActivityThread.java:141) 12-08 13:47:12.301: E/AndroidRuntime(1590): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 12-08 13:47:12.301: E/AndroidRuntime(1590): at android.os.Handler.dispatchMessage(Handler.java:99) 12-08 13:47:12.301: E/AndroidRuntime(1590): at android.os.Looper.loop(Looper.java:137) 12-08 13:47:12.301: E/AndroidRuntime(1590): at android.app.ActivityThread.main(ActivityThread.java:5039) 12-08 13:47:12.301: E/AndroidRuntime(1590): at java.lang.reflect.Method.invokeNative(Native Method) 12-08 13:47:12.301: E/AndroidRuntime(1590): at java.lang.reflect.Method.invoke(Method.java:511) 12-08 13:47:12.301: E/AndroidRuntime(1590): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 12-08 13:47:12.301: E/AndroidRuntime(1590): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 12-08 13:47:12.301: E/AndroidRuntime(1590): at dalvik.system.NativeStart.main(Native Method) 12-08 13:47:12.301: E/AndroidRuntime(1590): Caused by: java.lang.ClassNotFoundException: Didn””t find class “com.example.b.MainActivity” on path: /data/app/com.example.b-1.apk 12-08 13:47:12.301: E/AndroidRuntime(1590): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65) 12-08 13:47:12.301: E/AndroidRuntime(1590): at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 12-08 13:47:12.301: E/AndroidRuntime(1590): at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 12-08 13:47:12.301: E/AndroidRuntime(1590): at android.app.Instrumentation.newActivity(Instrumentation.java:1054) 12-08 13:47:12.301: E/AndroidRuntime(1590): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097) 12-08 13:47:12.301: E/AndroidRuntime(1590): … 11 more 12-08 13:47:50.512: E/Trace(1805): error opening trace file: No such file or directory (2) 12-08 13:47:50.512: W/Trace(1805): Unexpected value from nativeGetEnabledTags: 0 12-08 13:47:50.522: W/Trace(1805): Unexpected value from nativeGetEnabledTags: 0 12-08 13:47:50.522: W/Trace(1805): Unexpected value from nativeGetEnabledTags: 0 12-08 13:47:50.572: W/Trace(1805): Unexpected value from nativeGetEnabledTags: 0 12-08 13:47:50.572: W/Trace(1805): Unexpected value from nativeGetEnabledTags: 0 12-08 13:47:50.572: W/dalvikvm(1805): threadid=1: thread exiting with uncaught exception (group=0xb5d7d908) 12-08 13:47:50.612: E/AndroidRuntime(1805): FATAL EXCEPTION: main 12-08 13:47:50.612: E/AndroidRuntime(1805): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.b/com.example.b.MainActivity}: java.lang.ClassNotFoundException: Didn””t find class “com.example.b.MainActivity” on path: /data/app/com.example.b-1.apk 12-08 13:47:50.612: E/AndroidRuntime(1805): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2106) 12-08 13:47:50.612: E/AndroidRuntime(1805): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 12-08 13:47:50.612: E/AndroidRuntime(1805): at android.app.ActivityThread.access$600(ActivityThread.java:141) 12-08 13:47:50.612: E/AndroidRuntime(1805): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 12-08 13:47:50.612: E/AndroidRuntime(1805): at android.os.Handler.dispatchMessage(Handler.java:99) 12-08 13:47:50.612: E/AndroidRuntime(1805): at android.os.Looper.loop(Looper.java:137) 12-08 13:47:50.612: E/AndroidRuntime(1805): at android.app.ActivityThread.main(ActivityThread.java:5039) 12-08 13:47:50.612: E/AndroidRuntime(1805): at java.lang.reflect.Method.invokeNative(Native Method) 12-08 13:47:50.612: E/AndroidRuntime(1805): at java.lang.reflect.Method.invoke(Method.java:511) 12-08 13:47:50.612: E/AndroidRuntime(1805): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 12-08 13:47:50.612: E/AndroidRuntime(1805): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 12-08 13:47:50.612: E/AndroidRuntime(1805): at dalvik.system.NativeStart.main(Native Method) 12-08 13:47:50.612: E/AndroidRuntime(1805): Caused by: java.lang.ClassNotFoundException: Didn””t find class “com.example.b.MainActivity” on path: /data/app/com.example.b-1.apk 12-08 13:47:50.612: E/AndroidRuntime(1805): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65) 12-08 13:47:50.612: E/AndroidRuntime(1805): at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 12-08 13:47:50.612: E/AndroidRuntime(1805): at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 12-08 13:47:50.612: E/AndroidRuntime(1805): at android.app.Instrumentation.newActivity(Instrumentation.java:1054) 12-08 13:47:50.612: E/AndroidRuntime(1805): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097) 12-08 13:47:50.612: E/AndroidRuntime(1805): … 11 more 求大神帮帮忙啊。。。。
10分	找不到包请检查下结构目录
5分	你的项目是不是用到第三方的jar包了
10分	clean一下你的项目。。检查一下你的包名是否和注册的相同。。
10分	检查Mainifest.xml里注册的Activity是否与实现时的包结构相同
5分	Didn””t find class “com.example.b.MainActivity” on path: /data/app/com.example.b-1.apk
	引用 2 楼 lulong1985 的回复: 你的项目是不是用到第三方的jar包了对，但是包已经下载在本地了啊
	引用 1 楼 Happysch 的回复: 找不到包请检查下结构目录怎么检查，包都在本地了
	引用 3 楼 u013377714 的回复: clean一下你的项目。。检查一下你的包名是否和注册的相同。。好像是的，注册名不同
	把你的jar包在java build path中勾选上，在order and export中也勾选上
	引用 8 楼 Xing_zj_152 的回复: Quote: 引用 3 楼 u013377714 的回复: clean一下你的项目。。检查一下你的包名是否和注册的相同。。好像是的，注册名不同好的，给分。。
	哥们，怎么解决的。看评论也没看明白怎么改。求指教啊

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