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Android Error Java.lang.nullpointerexception

How far above a waterfall should you be to safely cross? Maybe that would make a useful addition to your answer? –Ilmari Karonen Jan 18 '14 at 9:28 7 @EJP "A null pointer is literally not pointing anywhere..." –Bill the Lizard I still can't find the problem If you tried to debug the problem and still don't have a solution, you can post a question for more help, but make sure to What should I do about this security issue? http://apexintsoft.com/android-error/android-error-during-launch-java-lang-nullpointerexception.php

Question: How do I track down the cause of the NPE exception in my code? Incompatible key type Schema.SObjectField for Map Is every non stationary series convertible to a stationary series through differencing If the co-signer on my car loan dies, can the family take the Unfortunately it is possible to call the method like this: doSomething(null); in which case obj is null. Take the following code: Integer num; num = new Integer(10); The first line declares a variable named num, but, it does not contain a primitive value. you can try this out

A NullPointerException is thrown at runtime whenever your program attempts to use a null as if it was a real reference. What is the role of conjectures in modern mathematics? All elements inside of an array are initialized to their common initial value; for any type of object array, that means that all elements are null. My button code was broken. –Andy Dec 29 '14 at 15:33 add a comment| up vote 0 down vote I had this problem and I struggled a lot to solve it

void finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. If the exception has an associated error message, that will be output after the exception name. Log in here OverviewAndroid Developer ForumAndroid Developer Forum (general) java.lang.NullPointerException error- Attempt to invoke virtual method 'java.lang.String org.json.JSONObject.getString(java.lang.String)' Replies:4OpenNot stickiedUnanswered 2 Head, Shoulders, Knees and Toes, Knees and Toes Two resistors in series Differences between Interrupts and sampling for hardware button?

Why rotational matrices are not commutative? Here i have NPE inGameActivity.java and Line no. Up next Android Studio Gradle Error Solve - Duration: 11:18. http://stackoverflow.com/questions/22928251/java-lang-nullpointerexception-error-in-android Lets start by exploring the first one: Where does bar come from?

Applications should throw instances of this class to indicate other illegal uses of the null object. Your Email This email is in use. Should I be concerned about "security"? Scala on Android member pfn commented Aug 30, 2013 The current version of Android build tools is 18.0.1; go back into sdk manager and make sure you install build tools; reload

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This will require some logical deduction. more hot questions lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Science Other Can a familiar use his reaction to attack someone leaving his reach?

Parameters s String: the detail message. this contact form Reload to refresh your session. For example, if you write this: public class Test { public static void main(String[] args) { String foo = null; int length = foo.length(); // HERE } } the statement labelled Full name * Email address * Company / developer name One of your Play Store app URLs * Which best describes your business:* Apps Games Apps & Games * *

The first "at" line would say that the exception was thrown in some line in the java.lang.String class, and line 4 of Test.java would be the second "at" line. NullPointerException Added in API level 1 NullPointerException (String s) Constructs a NullPointerException with the specified detail message. Calling a method on a null reference or trying to access a field of a null reference will trigger a NullPointerException. http://apexintsoft.com/android-error/android-error-converting-result-java-lang-nullpointerexception.php Linux questions C# questions ASP.NET questions fabric questions SQL questions discussionsforums All Message Boards...

so you have to give refrence from the xml or create object of listview. BANG! Taking the length of null as if it were an array.

Indeed it is!

What methods/tools can be used to determine the cause so that you stop the exception from causing the program to terminate prematurely? There are many ways that you could use a null value that will result in a NullPointerException. Why not just a ? –Koray Tugay May 5 '15 at 8:16 3 A variable that is null. IF you prefer to you Eclipse to follow along with the course; I'd suggest that you use Scanner , BufferedReader , or InputStreamReader class to get user input; and something like

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed It may be an indicator that you are doing other things. It's important to learn to read a stacktrace. http://apexintsoft.com/android-error/android-error-java-lang-outofmemoryerror.php Let's work to help developers, not make them feel stupid.

This will show you where the exception was thrown: Exception in thread "main" java.lang.NullPointerException at Printer.printString(Printer.java:13) at Printer.print(Printer.java:9) at Printer.main(Printer.java:19) Here, we see that the exception is thrown on line 13 We find out that s is null, and calling the length method on it throws the exception. What difficulty would the Roman Empire have besieging a fantasy kingdom's 49m wall? The problem in the program is NOT a compilation error.

Suppose i declare ListView and setAdapter. Do wire oven racks and solid plate oven racks have different functions? This results in a NullPointerException because there is no code to execute in the location that the reference is pointing. (This is a technicality, but I think it bears mentioning: A Please help me. -- Reply to this email directly or view it on GitHub<#13> .

final void wait(long millis, int nanos) Causes the current thread to wait until another thread invokes the notify() method or the notifyAll() method for this object, or Sign in 41 3 Don't like this video? Use equals with known object first: if("knownObject".equals(unknownObject) Prefer valueOf() over toString(). asked 2 years ago viewed 1108 times active 2 years ago Blog How We Make Money at Stack Overflow: 2016 Edition Upcoming Events 2016 Community Moderator Election ends in 5 days

The error message is just changed to "Android SDK build-tools not available" and the problem is not fixed. A null pointer is literally not pointing anywhere, which is subtly different than pointing to a location that happens to be invalid.) share edited Sep 30 at 13:22 answered Oct 20 This error occures when you try to refer to a null object instance.