Asynctask causing NullPointerException

Issue

I have an app on Google play. I got a few error reports from the developer page and It's quite hard to figure out the problem.

This is what I have:

 java.lang.NullPointerException
at com.seb.example.free.MainActivity$ApplyFilter.onPostExecute(MainActivity.java:828)
at com.seb.example.free.MainActivity$ApplyFilter.onPostExecute(v.java:1)
at android.os.AsyncTask.finish(AsyncTask.java:631)
at android.os.AsyncTask.access$600(AsyncTask.java:177)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:153)
at android.app.ActivityThread.main(ActivityThread.java:4987)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584)
at dalvik.system.NativeStart.main(Native Method)

As you can see I have an asynctask innerclass and the error seems to be in on postexecute. I have checked my project in eclipse and, as the stacktrace says, the error is on line 828:

(iV.getVisibility() == ImageView.INVISIBLE)

My imageView, iV, is declared as private in MainActivity and I initiate it in oncreate. I can't reproduce the problem on the three of my phones as i have tested on, so it's quite hard to understand what's causing it.

Anyone who has any ideas? Thanks!

Solution

I think that imageview object is becomes null in some where in your code..check whether it initialized or not..and if initialized check where it is used in your project.

Answered By - kalyan pvs