Refactoring

app/src/main/java/eu/faircode/email/ActivityBase.java

@@ -147,8 +147,7 @@ abstract class ActivityBase extends AppCompatActivity implements SharedPreferenc
 
         if (pm != null && !pm.isInteractive()) {
             Log.i("Stop with screen off");
-            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ActivityBase.this);
-            prefs.edit().remove("last_authentication").apply();
+            Helper.clearAuthentication(this);
         }
     }
 

app/src/main/java/eu/faircode/email/Helper.java

@@ -751,6 +751,11 @@ public class Helper {
         prompt.authenticate(info.build());
     }
 
+    static void clearAuthentication(Context context) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        prefs.edit().remove("last_authentication").apply();
+    }
+
     // Miscellaneous
 
     static String sanitizeKeyword(String keyword) {