Favourite content is not shown correctly on webview

I think the problem comes from this line

            mWordFavourite = new ArrayList<String>(Arrays.asList(strFavourite.split(",")));

where you create a new ArrayList <string> object every time but you should append to it?
& get the last one otherwise you should put it in one variable

If you are checking if its size() >0

But each time you create a new object not appending to it

Maybe I am wrong!