Layout android not working

I wanted to put dynamically the checkboxes with the names that I retrieve from the API one below the other, but when I run the code the checkbox I see just one and the others are in the back of it

  JSONObject json = new JSONObject(result);
                            arr = json.getJSONArray("functionality");

                            for(int i = 0; i < arr.length(); i++) {
                               String name = arr.getJSONObject(i).getString("name");
                                CheckBox check  = new CheckBox(rootView.getContext());
                                LinearLayout.LayoutParams lparams = new LinearLayout.LayoutParams(
                                        LinearLayout.LayoutParams.MATCH_PARENT,
                                        LinearLayout.LayoutParams.WRAP_CONTENT);
                                check.setLayoutParams(lparams);
                                check.setText(name);
                                container.addView(check);
                            }