Fix a crashing bug

Signed-off-by: Mario Danic <mario@lovelyhq.com>

src/main/java/com/owncloud/android/ui/activity/FolderSyncActivity.java

@@ -473,7 +473,9 @@ public class FolderSyncActivity extends FileActivity implements FolderSyncAdapte
             long storedId = mSyncedFolderProvider.storeFolderSync(syncedFolderDisplayItem);
             if (storedId != -1) {
                 syncedFolderDisplayItem.setId(storedId);
-                EventBus.getDefault().post(new InitiateSyncedFolder(syncedFolderDisplayItem));
+                if (syncedFolderDisplayItem.isEnabled()) {
+                    EventBus.getDefault().post(new InitiateSyncedFolder(syncedFolderDisplayItem));
+                }
             }
         }
     }
@@ -518,7 +520,9 @@ public class FolderSyncActivity extends FileActivity implements FolderSyncAdapte
             long storedId = mSyncedFolderProvider.storeFolderSync(newCustomFolder);
             if (storedId != -1) {
                 newCustomFolder.setId(storedId);
-                EventBus.getDefault().post(new InitiateSyncedFolder(newCustomFolder));
+                if (newCustomFolder.isEnabled()) {
+                    EventBus.getDefault().post(new InitiateSyncedFolder(newCustomFolder));
+                }
             }
             mAdapter.addSyncFolderItem(newCustomFolder);
         } else {
@@ -533,7 +537,9 @@ public class FolderSyncActivity extends FileActivity implements FolderSyncAdapte
                 long storedId = mSyncedFolderProvider.storeFolderSync(item);
                 if (storedId != -1) {
                     item.setId(storedId);
-                    EventBus.getDefault().post(new InitiateSyncedFolder(item));
+                    if (item.isEnabled()) {
+                        EventBus.getDefault().post(new InitiateSyncedFolder(item));
+                    }
                 }
             } else {
                 // existing synced folder setup to be updated
@@ -557,7 +563,6 @@ public class FolderSyncActivity extends FileActivity implements FolderSyncAdapte
     public void onDeleteSyncedFolderPreference(SyncedFolderParcelable syncedFolder) {
         mSyncedFolderProvider.deleteSyncedFolder(syncedFolder.getId());
         mAdapter.removeItem(syncedFolder.getSection());
-        mAdapter.notifyDataSetChanged();
     }
 
     /**

src/main/java/com/owncloud/android/utils/DisplayUtils.java

@@ -389,6 +389,11 @@ public class DisplayUtils {
     public static SpannableStringBuilder createTextWithSpan(String text, String spanText, StyleSpan style) {
         SpannableStringBuilder sb = new SpannableStringBuilder(text);
         int start = text.lastIndexOf(spanText);
+
+        if (start < 0) {
+            start++;
+        }
+
         int end = start + spanText.length();
         sb.setSpan(style, start, end, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
         return sb;