Attempt to invoke virtual method ‘void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)’ on a null object reference

by

It seems the button you are invoking is not in the layout you are using in setContentView(R.layout.your_layout)
Check it.

More Related Contents:

  1. Why is my app is crashing while using async task?
  2. Android, NullPointerException
  3. android studio : findViewById return NULL Pointer [duplicate]
  4. Download a file with Android, and showing the progress in a ProgressDialog
  5. NullPointerException accessing views in onCreate()
  6. How to check internet access on Android? InetAddress never times out
  7. Inner class can access but not update values – AsyncTask
  8. How do I return a boolean from AsyncTask?
  9. The AsyncTask API is deprecated in Android 11. What are the alternatives?
  10. Return a value from AsyncTask in Android [duplicate]
  11. Error invoke virtual method ‘double android.location.Location.getLatitude()’ on a null object reference
  12. Android – Setting a Timeout for an AsyncTask?
  13. Android: Pass data(extras) to a fragment
  14. java.net.UnknownHostException: Unable to resolve host “”: No address associated with hostname and End of input at character 0 of
  15. How one interface can be used for different background android tasks?
  16. RxJava instead of AsyncTask?
  17. Return data from AsyncTask class
  18. java.lang.NullPointerException: Attempt to invoke virtual method on a null object reference [duplicate]
  19. Can I chain async task sequentially (starting one after the previous asynctask completes)
  20. AsyncTask.executeOnExecutor() before API Level 11
  21. Android: How to run asynctask from different class file?
  22. Using AsyncTask with passing a value
  23. How to use AsyncTask
  24. Asynctask: pass two or more values from doInBackground to onPostExecute
  25. Android: java.lang.NullPointerException: Attempt to invoke virtual method ‘java.lang.String java.lang.Object.toString()’ on a null object reference
  26. How to handle return value from AsyncTask
  27. Creating new Android (Java ) file in Existing Android package [closed]
  28. How to add a recyclerView inside another recyclerView
  29. Print array without brackets and commas
  30. Where is main() in Android?

Leave a Comment