error در برنامه ضبط صدا

[Raminab]

سلام دوستان
من میخواستم ی برنامه بنویسم تو ی قسمتش لازم شد از audioRecord استفاده کنم ولی وقتی برنامه رو باز میکنم stop میشه
حتی تو ی پروژه جداگانه از سورسای آمادش استفاده کردم همینجوری stop شد
permission های مربوط بهشم گرفتم!
این log برناممه , میشه بگید چه ایرادی میگیره؟





03-31 18:17:25.852: E/AndroidRuntime(5633): FATAL EXCEPTION: main
03-31 18:17:25.852: E/AndroidRuntime(5633): Process: com.example.mediarecorder, PID: 5633
03-31 18:17:25.852: E/AndroidRuntime(5633): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.mediarecorder/com.example.mediarecorder.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.example.mediarecorder.MainActivity" on path: DexPathList[[zip file "/data/app/com.example.mediarecorder-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.mediarecorder-2, /system/lib, /system/lib/arm, /data/downloads]]
03-31 18:17:25.852: E/AndroidRuntime(5633): at android.app.ActivityThread.performLaunchActivity(A ctivityThread.java:2121)
03-31 18:17:25.852: E/AndroidRuntime(5633): at android.app.ActivityThread.handleLaunchActivity(Ac tivityThread.java:2245)
03-31 18:17:25.852: E/AndroidRuntime(5633): at android.app.ActivityThread.access$800(ActivityThre ad.java:135)
03-31 18:17:25.852: E/AndroidRuntime(5633): at android.app.ActivityThread$H.handleMessage(Activit yThread.java:1196)
03-31 18:17:25.852: E/AndroidRuntime(5633): at android.os.Handler.dispatchMessage(Handler.java:10 2)
03-31 18:17:25.852: E/AndroidRuntime(5633): at android.os.Looper.loop(Looper.java:136)
03-31 18:17:25.852: E/AndroidRuntime(5633): at android.app.ActivityThread.main(ActivityThread.jav a:5021)
03-31 18:17:25.852: E/AndroidRuntime(5633): at java.lang.reflect.Method.invokeNative(Native Method)
03-31 18:17:25.852: E/AndroidRuntime(5633): at java.lang.reflect.Method.invoke(Method.java:515)
03-31 18:17:25.852: E/AndroidRuntime(5633): at com.android.internal.os.ZygoteInit$MethodAndArgsCa ller.run(ZygoteInit.java:827)
03-31 18:17:25.852: E/AndroidRuntime(5633): at com.android.internal.os.ZygoteInit.main(ZygoteInit .java:643)
03-31 18:17:25.852: E/AndroidRuntime(5633): at dalvik.system.NativeStart.main(Native Method)
03-31 18:17:25.852: E/AndroidRuntime(5633): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.mediarecorder.MainActivity" on path: DexPathList[[zip file "/data/app/com.example.mediarecorder-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.mediarecorder-2, /system/lib, /system/lib/arm, /data/downloads]]
03-31 18:17:25.852: E/AndroidRuntime(5633): at dalvik.system.BaseDexClassLoader.findClass(BaseDex ClassLoader.java:56)
03-31 18:17:25.852: E/AndroidRuntime(5633): at java.lang.ClassLoader.loadClass(ClassLoader.java:4 97)
03-31 18:17:25.852: E/AndroidRuntime(5633): at java.lang.ClassLoader.loadClass(ClassLoader.java:4 57)
03-31 18:17:25.852: E/AndroidRuntime(5633): at android.app.Instrumentation.newActivity(Instrument ation.java:1064)
03-31 18:17:25.852: E/AndroidRuntime(5633): at android.app.ActivityThread.performLaunchActivity(A ctivityThread.java:2112)