how to fix java lang runtimeexception

12-19 12:12:42. 701: E/androidruntime (626): Java. lang. runtimeexception: unable to start activity componentinfo {COM. CLM. activity/COM. CLM. activity. registactivity}: Java. lang. nullpointerexception 12-19 12:12:42. 701: E/androidruntime (626 ):At com. CLM. activity.

During RCP Eclipse plug-in development, the following error is always reported when the management software interface is started: ! Entry org. Eclipse. UI. workbench 4 0 18:44:21. 306! Message warning: prevented recursive attempt to activate part Org. gluster. storage. management. console. views. clustersummaryview while still in the middle of activating part Org. gluster. storage. management. console. views. navigationview! Stack 0Java. lang.

Today, we have an appwidget. To determine the WiFi and Bluetooth statuses, it takes some time to change the process status. Therefore, we need to open a thread to determine and then update the interface. A thread is opened directly to call the UPDATE function in the thread. Unfortunately, an error is prompted when you click Add appwidget for the first time. Java. Lang.

Java. lang. RuntimeException: Invalid action class configuration that references an unknown class named was found online. The most common cause is that the configuration file or field is wrong. The ClassNotFound error is also prompted. Think about the struts2 configuration. The default mode is sington. If you do not configure it in spring. If you want to log on t

Java. LanG. runtimeexception: Invalid action class configuration that references an unknown class named [xxxaction]. When using SSH for project development, the above error message may appear accidentally. This article summarizes the development experience of Forum experts and analyzes the causes of this error in detail. We hope you can help students with th

RuntimeException more special If the exception is thrown in the function body, the function name can not be declared, and compilation can be done by the caller without processing even if the exception is declared on the function name.The reason is not declared on the function, is not want the caller to handle, because can not handle, only the program to stop the modification code to fix.When this happens, the exception caller cannot handle it, only mo

Error cause returned when one Actiivty enters another Actiivty: because the target Activity's permission is not changed to publicclass *** ActivityFATALEXCEPTION: mainjava. lang. RuntimeException: UnabletoinstantiateactivityComponentInfo {com. duguang Error cause returned when one Actiivty enters another Actiivty: because the target Activity has the permission not to change public class *** Activity to publ

Today I encountered such a problem and solved it. I know what is going on. Java. lang class IllegalArgumentExceptionjava. lang. Object java. lang. Throwable java. lang. Exception

Many people see Java. lang. runtimeexception: Unable to instantiate activity componentinfo {***** activity}: Java. lang. classnotfoundexception: Didn't find class "***** activity"On Path:/data/APP /*******. APK error. In Android development, I also encountered this problem.