after update of my android package name change DataBindingUtil.setContentView returns null

1. Build > Clean Project

2. go to your Build.gradle (Module) and disable databinding:

   android { dataBinding { enabled = false } }

3. File > Sync Project with Gradle Files

4. Build > Rebuild Project (no surprise: you'll get a ton of error messages)

5. Now enable databinding again:

   android { dataBinding { enabled = true } }

6. File > Sync Project with Gradle Files

7. Build > Rebuild Project

8.