안드로이드 오류 로그분석 도와주세요.3

안드로이드 책보면서 하고 있는데

액티비티 생성되면서 오류가 나버리더군요.

로그를 보면 머..인스턴스화가 안된다고 하는거 같은데  원인을 못 잡겠네요..

도와주시면 감사하겠습니다.

05-20 18:19:31.316: D/dalvikvm(30449): newInstance failed: no ()
05-20 18:19:31.316: D/AndroidRuntime(30449): Shutting down VM
05-20 18:19:31.316: W/dalvikvm(30449): threadid=1: thread exiting with uncaught exception (group=0x4185d2a0)
05-20 18:19:31.316: E/AndroidRuntime(30449): FATAL EXCEPTION: main
05-20 18:19:31.316: E/AndroidRuntime(30449): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.examples.sqlite/com.examples.sqlite.NotesDbAdapter}: java.lang.InstantiationException: can't instantiate class com.examples.sqlite.NotesDbAdapter; no empty constructor
05-20 18:19:31.316: E/AndroidRuntime(30449):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2034)
05-20 18:19:31.316: E/AndroidRuntime(30449):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
05-20 18:19:31.316: E/AndroidRuntime(30449):  at android.app.ActivityThread.access$700(ActivityThread.java:140)
05-20 18:19:31.316: E/AndroidRuntime(30449):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
05-20 18:19:31.316: E/AndroidRuntime(30449):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-20 18:19:31.316: E/AndroidRuntime(30449):  at android.os.Looper.loop(Looper.java:137)
05-20 18:19:31.316: E/AndroidRuntime(30449):  at android.app.ActivityThread.main(ActivityThread.java:4921)
05-20 18:19:31.316: E/AndroidRuntime(30449):  at java.lang.reflect.Method.invokeNative(Native Method)
05-20 18:19:31.316: E/AndroidRuntime(30449):  at java.lang.reflect.Method.invoke(Method.java:511)
05-20 18:19:31.316: E/AndroidRuntime(30449):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
05-20 18:19:31.316: E/AndroidRuntime(30449):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
05-20 18:19:31.316: E/AndroidRuntime(30449):  at dalvik.system.NativeStart.main(Native Method)
05-20 18:19:31.316: E/AndroidRuntime(30449): Caused by: java.lang.InstantiationException: can't instantiate class com.examples.sqlite.NotesDbAdapter; no empty constructor
05-20 18:19:31.316: E/AndroidRuntime(30449):  at java.lang.Class.newInstanceImpl(Native Method)
05-20 18:19:31.316: E/AndroidRuntime(30449):  at java.lang.Class.newInstance(Class.java:1319)
05-20 18:19:31.316: E/AndroidRuntime(30449):  at android.app.Instrumentation.newActivity(Instrumentation.java:1068)
05-20 18:19:31.316: E/AndroidRuntime(30449):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2025)
05-20 18:19:31.316: E/AndroidRuntime(30449):  ... 11 more