Display button while JSON object url match

I need to display a button while JSON object (Bookurl is match).  I used below code.

 private void initApplicationAR()    {next=(Button)mUILayout.findViewById(R.id.nextbtn);                 if(next != null){            next.setVisibility(View.GONE);       }

Above it working. 

 

JSONObject  jsonObject = new JSONObject(builder.toString());                 // Generates a new Book Object with the JSON object data                mBookData = new Book(); Log.v(TAG, "Book thumburl is=" + mBookData.getBookUrl());                 if(jsonObject.getString("thumburl").toString().equals("http://test.net/projects/AR/Vuforia/Cloud_Reco/pack.png")){                                Log.v(TAG, "Equal book url ");                                next.setVisibility(View.VISIBLE);                } Above code the Book thumburl is coming proper (http://test.net/projects/AR/Vuforia/Cloud_Reco/pack.png) and the log Equa book url is showing. But next button is not visible then augment bitmap image is not showing only closeButton showing. If i remove this line next.setVisibility(View.VISIBLE); the augment bitmap image showing.