java convert exception stack trace to string

StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
sw.toString();

Signed android app install fails with: The application could not be installed: INSTALL_PARSE_FAILED_NO_CERTIFICATES

do the install with adb from the command line, not from android studio

solution for android sharedpreferences is not updated when using stringset data

Just read the docs. The StringSet returned from prefs should not be modified. Make a copy.