Fix profile fetching when username sometimes without '@'

app/src/main/java/awais/instagrabber/fragments/main/ProfileFragment.java

@@ -592,8 +592,11 @@ public class ProfileFragment extends Fragment implements SwipeRefreshLayout.OnRe
 
     private void fetchProfileDetails() {
         accountIsUpdated = false;
-        new ProfileFetcher(TextUtils.isEmpty(username) ? null : username.trim().substring(1),
-                myId, isLoggedIn, new FetchListener<User>() {
+        String usernameTemp = username.trim();
+        if (usernameTemp.startsWith("@")) {
+            usernameTemp = usernameTemp.substring(1);
+        }
+        new ProfileFetcher(TextUtils.isEmpty(username) ? null : usernameTemp, myId, isLoggedIn, new FetchListener<User>() {
             @Override
             public void onResult(final User user) {
                 if (getContext() == null) return;
@@ -614,7 +617,7 @@ public class ProfileFragment extends Fragment implements SwipeRefreshLayout.OnRe
                                                   isLoggedIn ? R.string.error_loading_profile_loggedin : R.string.error_loading_profile,
                                                   Toast.LENGTH_LONG).show();
                     else Toast.makeText(context, t.getMessage(), Toast.LENGTH_SHORT).show();
-                } catch (final Throwable e) {}
+                } catch (final Throwable ignored) {}
             }
 
         }).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);