Fixing small issue

Author: Ron Radtke

android/src/main/java/com/ReactNativeBlobUtil/ReactNativeBlobUtil.java

@@ -465,6 +465,10 @@ public void copyToMediaStore(ReadableMap filedata, String mt, String path, Promi
             promise.reject("ReactNativeBlobUtil.createMediaFile", "invalid mediatype");
             return;
         }
+        if (path == null) {
+            promise.reject("ReactNativeBlobUtil.createMediaFile", "invalid path");
+            return;
+        }
 
         FileDescription file = new FileDescription(filedata.getString("name"), filedata.getString("mimeType"), filedata.getString("parentFolder"));
         Uri fileuri = ReactNativeBlobUtilMediaCollection.createNewMediaFile(file, ReactNativeBlobUtilMediaCollection.MediaType.valueOf(mt));
@@ -476,7 +480,7 @@ public void copyToMediaStore(ReadableMap filedata, String mt, String path, Promi
 
         boolean res = ReactNativeBlobUtilMediaCollection.writeToMediaFile(fileuri, path, promise);
 
-        if(res) promise.resolve(fileuri);
+        if(res) promise.resolve(fileuri.toString());
     }
 
 }

android/src/main/java/com/ReactNativeBlobUtil/ReactNativeBlobUtilMediaCollection.java

@@ -130,7 +130,7 @@ public static boolean writeToMediaFile(Uri fileUri, String data, Promise promise
                     File src = new File(normalizedData);
                     if (!src.exists()) {
                         promise.reject("ENOENT", "No such file ('" + normalizedData + "')");
-                        return;
+                        return false;
                     }
                     byte[] buf = new byte[10240];
                     int read;
@@ -179,7 +179,9 @@ public static boolean writeToMediaFile(Uri fileUri, String data, Promise promise
 
         } catch (IOException e) {
             promise.reject("ReactNativeBlobUtil.createMediaFile", "Cannot write to file, file might not exist");
+            return false;
         }
+        return true;
     }
 
     public static void copyToInternal(Uri contenturi, String destpath, Promise promise) {