+ @Override
+ public boolean onOptionsItemSelected(MenuItem item) {
+ if (item.getItemId() == android.R.id.home) {
+ if (navController.getCurrentDestination()
+ .getId() == R.id.patternDetailsFragment)
+ navController.popBackStack();
+ else
+ finish();
+
+ return true;
+ }
+ return super.onOptionsItemSelected(item);
+ }
+