codacy: String.startsWith can be rewritten using String.charAt(0)

src/main/java/com/owncloud/android/datamodel/OCFile.java

@@ -714,7 +714,7 @@ public class OCFile implements Parcelable, Comparable<OCFile>, ServerFileInterfa
      * @return 'True' if the file is hidden
      */
     public boolean isHidden() {
-        return getFileName().startsWith(".");
+        return getFileName().charAt(0) == '.';
     }
 
     public String getPermissions() {

src/main/java/com/owncloud/android/datastorage/providers/MountCommandStoragePointProvider.java

@@ -62,7 +62,7 @@ public class MountCommandStoragePointProvider extends AbstractCommandLineStorage
             if (!line.toLowerCase(Locale.US).contains("asec") && sPattern.matcher(line).matches()) {
                 String parts[] = line.split(" ");
                 for (String path : parts) {
-                    if (path.startsWith("/") && !path.toLowerCase(Locale.US).contains("vold")) {
+                    if (path.charAt(0) == '/' && !path.toLowerCase(Locale.US).contains("vold")) {
                         result.add(path);
                     }
                 }

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

@@ -252,7 +252,7 @@ public final class DisplayUtils {
 
         String urlNoDots = url;
         String dots = "";
-        while (urlNoDots.startsWith(".")) {
+        while (urlNoDots.charAt(0) == '.') {
             urlNoDots = url.substring(1);
             dots = dots + ".";
         }