error of using NotificationCompat.Builder, IllegalArgumentException: contentIntent required

Refer to the exercise "Example of using NotificationCompat.Builder"; if the statement of new NotificationCompat.Builder...build() modified to remove .setContentIntent(pendingIntent), error of java.lang.IllegalArgumentException: contentIntent required MAY be thrown.

It will have no error in compile time, and no error when run on HTC One X (Android 4.1.1) and HTC Fly (Android 3.2.1). But error when run on Nexus One (Android 2.3.6), with error:

03-27 21:33:40.631: D/AndroidRuntime(24248): Shutting down VM
03-27 21:33:40.631: W/dalvikvm(24248): threadid=1: thread exiting with uncaught exception (group=0x40015560)
03-27 21:33:40.651: E/AndroidRuntime(24248): FATAL EXCEPTION: main
03-27 21:33:40.651: E/AndroidRuntime(24248): java.lang.IllegalArgumentException: contentIntent required: pkg=com.example.androidnotificationbuilder id=1 notification=Notification(vibrate=null,sound=default,defaults=0x1,flags=0x10)
03-27 21:33:40.651: E/AndroidRuntime(24248): at android.os.Parcel.readException(Parcel.java:1326)
03-27 21:33:40.651: E/AndroidRuntime(24248): at android.os.Parcel.readException(Parcel.java:1276)
03-27 21:33:40.651: E/AndroidRuntime(24248): at android.app.INotificationManager$Stub$Proxy.enqueueNotificationWithTag(INotificationManager.java:274)
03-27 21:33:40.651: E/AndroidRuntime(24248): at android.app.NotificationManager.notify(NotificationManager.java:111)
03-27 21:33:40.651: E/AndroidRuntime(24248): at android.app.NotificationManager.notify(NotificationManager.java:91)
03-27 21:33:40.651: E/AndroidRuntime(24248): at com.example.androidnotificationbuilder.MainActivity$1.onClick(MainActivity.java:52)
03-27 21:33:40.651: E/AndroidRuntime(24248): at android.view.View.performClick(View.java:2485)
03-27 21:33:40.651: E/AndroidRuntime(24248): at android.view.View$PerformClick.run(View.java:9080)
03-27 21:33:40.651: E/AndroidRuntime(24248): at android.os.Handler.handleCallback(Handler.java:587)
03-27 21:33:40.651: E/AndroidRuntime(24248): at android.os.Handler.dispatchMessage(Handler.java:92)
03-27 21:33:40.651: E/AndroidRuntime(24248): at android.os.Looper.loop(Looper.java:130)
03-27 21:33:40.651: E/AndroidRuntime(24248): at android.app.ActivityThread.main(ActivityThread.java:3683)
03-27 21:33:40.651: E/AndroidRuntime(24248): at java.lang.reflect.Method.invokeNative(Native Method)
03-27 21:33:40.651: E/AndroidRuntime(24248): at java.lang.reflect.Method.invoke(Method.java:507)
03-27 21:33:40.651: E/AndroidRuntime(24248): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
03-27 21:33:40.651: E/AndroidRuntime(24248): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
03-27 21:33:40.651: E/AndroidRuntime(24248): at dalvik.system.NativeStart.main(Native Method)

If you want no action perform when user click on the Notification, you can create a PendingIntent with empty Intent for Notification to do nothing.