data.add("Convocatória feita por "+username);
                    messages = new ArrayAdapter<String>(ConvActivity.this, android.R.layout.simple_list_item_2, data);
                    data.add(chatConv.substring(0,chatConv.length()-100));
                    messages = new ArrayAdapter<String>(ConvActivity.this, android.R.layout.simple_list_item_multiple_choice, data);
                    data.add(chatConv.substring(chatConv.length()-100,chatConv.length()-50));
                    messages = new ArrayAdapter<String>(ConvActivity.this, android.R.layout.simple_list_item_multiple_choice, data);
                    data.add(chatConv.substring(chatConv.length()-50,chatConv.length())+"\n");
                    messages = new ArrayAdapter<String>(ConvActivity.this, android.R.layout.simple_list_item_multiple_choice, data);
                    listView.setAdapter(messages);