fixed pmd bugs

Author: Mahavir Jain

folioreader/src/main/java/com/folioreader/activity/FolioActivity.java

@@ -40,7 +40,6 @@
 import com.folioreader.smil.SmilFile;
 import com.folioreader.smil.TextElement;
 import com.folioreader.util.AppUtil;
-import com.folioreader.util.EpubManipulator;
 import com.folioreader.util.ProgressDialog;
 import com.folioreader.view.AudioView;
 import com.folioreader.view.ConfigView;

folioreader/src/main/java/com/folioreader/fragments/ContentsFragment.java

@@ -38,9 +38,7 @@ public class ContentsFragment extends Fragment {
     private int mSelectedChapterPosition;
     private boolean mIsNightMode;
 
-
-
-    public static ContentsFragment newInstance(Book book,int selectedChapterPosition) {
+    public static ContentsFragment newInstance(Book book, int selectedChapterPosition) {
         ContentsFragment contentsFragment = new ContentsFragment();
         Bundle args = new Bundle();
         args.putSerializable(BOOK, book);

folioreader/src/main/java/com/folioreader/fragments/FolioPageFragment.java

@@ -337,7 +337,7 @@ public void endSelection() {
 
         //String opfPath = AppUtil.getPathOPF(AppUtil.getFolioEpubFolderPath(mEpubFileName), mContext);
         //String baseUrl = "file://" + AppUtil.getFolioEpubFolderPath(mEpubFileName) + "/" + opfPath + "//";
-        String baseUrl = "file://" + pageHref.substring(0, pageHref.lastIndexOf("/")) + "//";
+        String baseUrl = "file://" + pageHref.substring(0, pageHref.lastIndexOf('/')) + "//";
         mWebview.loadDataWithBaseURL(baseUrl, htmlContent, "text/html", "UTF-8", null);
         ((FolioActivity) getActivity()).setLastWebViewPosition(mScrollY);
     }
@@ -477,7 +477,7 @@ public void reload() {
         //String baseUrl = "file://" + AppUtil.getFolioEpubFolderPath(mEpubFileName) + "/" + opfPath + "//";
         String baseUrl = "file://" + epubFilePath + "/" + opfPath + "//";*/
 
-        String baseUrl = "file://" + pageHref.substring(0, pageHref.lastIndexOf("/")) + "//";
+        String baseUrl = "file://" + pageHref.substring(0, pageHref.lastIndexOf('/')) + "//";
         webView.loadDataWithBaseURL(baseUrl, htmlContent, "text/html", "UTF-8", null);
         updatePagesLeftTextBg();
     }