App crashes while clicking on undo option.

Project information

• Repository
  https://github.com/ramack/ActivityDiary/issues

• Project name :Activity dairy

• Publisher:

Expected behaviour

When I open the Activity diary and delete all activity and add new activity. I add photo and note and i click on options and select diary option .then I edit start date and end date and I go to main menu of app.then I click on added activity and click on undo option it must work.

Actual behaviour

When I open the activity diary app and delete all activities and add new activity.i Add Image and note.then i click on options botton and select diary options . Then i select recent added activity . Change start and end date then I go back back to main menu and click on recent added activity and I want to undo this when I click on undo add crashes.

How to reproduce

• Open the activity diary app.
• Delete all activities.
• Add new activity.
• Select photo and write note.
• Click on options botton.
• Select diary option.
• Change start and end date.
• Go back to main menu.
• Click on recent added activity.
  *Click on undo option.
• After clicking on undo option app crashes.
• Browser: Activity diary.
• Version: 1.2.2
• Operating system:7.1.2

Recording of the bug

I have opened this on GitHub

This is the link to my github account
Here