Error:java.lang.NullPointerException in android

Thrown when a program tries to access a field or method of an object or an element of an array when there is no instance or array to use, that is if the object or array points to null. It also occurs in some other, less obvious circumstances, like a throw e statement where the Throwable reference is null.

If you more about this java.lang.NullPointerException in android  problem , then click following link, I think, which is more helpful .

http://developer.android.com/reference/java/lang/NullPointerException.html

http://stackoverflow.com/questions/6317192/android-java-lang-nullpointerexception-help

http://www.google.com/support/forum/p/Google+Mobile/thread?tid=45037b85b6b131ab&hl=en

http://help.appmakr.com/entries/20032222-i-m-getting-a-null-pointer-exception-crash-report-from-droid

http://developer.appcelerator.com/question/126109/android-crash-on-device-javalangnullpointerexception

http://code.google.com/p/android-sms/issues/detail?id=28

http://stackoverflow.com/questions/3869883/java-lang-nullpointerexception

http://stackoverflow.com/questions/4635715/java-lang-nullpointerexception

http://androidcookbook.com/Recipe.seam;jsessionid=184679960D7135D361B76DB5827C8393?recipeId=785&recipeFrom=ViewTOC

http://stackoverflow.com/questions/7995382/java-lang-nullpointerexception-error