Urgent: Fix Android App Crash Issues

I'm seeking an experienced Android developer to help resolve crash issues in my app, which uses web view and Java. The crashes are affecting 6% of users, as reported in my Google Play Store developer account. I have screenshots available to assist in diagnosing the problems.

The specific crashes to address include:
- java.util.concurrent.RejectedExecutionException
- java.lang.NullPointerException
- java.lang.IllegalArgumentException
- [libart.so] art_quick_invoke_stub
- SIGBUS

Key Requirements:
- Diagnose and fix the listed crash issues
- Ensure the app runs smoothly without further crashes
- Utilize provided screenshots for troubleshooting
- Experience with web view integration in Android apps

Ideal Skills and Experience:
- Strong proficiency in Java and Android development
- Experience in debugging and resolving app crashes
- Familiarity with handling exceptions and improving app stability
- Ability to work independently and effectively communicate progress

If you have the expertise to tackle these issues and improve the app's performance, I would love to hear from you!

You will fix issues and resubmit app app to Google after.