Class Not Found Using The Boot Class Loader

there are a few questions out there about this, however I cannot get any of their solutions to work. Everything I've tried has failed, does anyone know what I'm doing wrong? Here i

Solution 1:

I uninstall The application on the Android pad,then clean the project.and now I solve the problem "Class not found using the boot class loader; no stack trace available" just like you.

Solution 2:

Although reinstalling can solve the problem in some cases, if the problem persists try to restart the phone and reinstall the app.

Solution 3:

Uninstall the application from phone then run the code to install apk.