Getting multiple byte arrays from jsonobject error

I am having trouble getting multiple byte arrays from a jsonObject in a JsonArray. I have three images in my database on azure which are each stored as a byte array. I can successfully receive the json object and retrieve the image string which i can then successfully convert to bytes and decode. However when i try to start the next activity the next screen is blank and my device eventually tell me the app is not responding! This code works if i use one image but if i use more than that then i receive this problem. I have been trying every possible solution all morning and have not been able to figure out what is wrong. Can anyone help me please? I know it must be something small but cant see where it is.

JSONArray jArray = c.getJSONArray("Exercises");
                        JSONArray imgJSON = null;
                        for(int j = 0; j < jArray.length(); j++) {
                            IDexerciseTemp = jArray.getJSONObject(j).getString("IDexercise");
                            Name = jArray.getJSONObject(j).getString("Name");
                            LiftValueTemp = jArray.getJSONObject(j).getString("LiftValue");
                            String dateTemp = jArray.getJSONObject(j).getString("DateLogged");

                            JSONArray stepsArray = jArray.getJSONObject(j).getJSONArray("StepL");
                            for(int z = 0; z < stepsArray.length(); z++)
                            {
                                step = stepsArray.getJSONObject(z).getString("StepDes");
                                IDstepTemp = stepsArray.getJSONObject(z).getString("IDstep");
                            }
                            IDstep = Integer.parseInt(IDstepTemp);
                            s1.IDstep = IDstep;
                            s1.StepDes = step;
                            stepsList.add(s1);

This loop here is what is giving me problems!! It works if i set the condition to a < 1 but anything greater than one and then when i try to move to the next activity the next screen is blank and tells me the app is not responding!

                            JSONArray imageArray = jArray.getJSONObject(j).getJSONArray("ExerciseImageL");
                            int er = imageArray.length();

                            System.out.println("ER: " + er);
                            for(int a = 0; a < imageArray.length(); a++)
                            {
                                String imageS = imageArray.getJSONObject(a).getString("Image");
                                System.out.println("IMAGEs: " + imageS);
                                byte[] eBytes = Base64.decode(imageS.getBytes(), Base64.DEFAULT);
                                eImage = new ExerciseImage();
                                eImage.Image = eBytes.clone();
                                System.out.println("eImage: " + eImage.Image.toString());
                                exerciseImgList.add(eImage);
                            }