connection and Toastbar not displaying issue - codenameone

Question

1)ConnectionRequest using actionListener as parameter
ArrayList<Map<String, Object>> responses;
public void groupConnection(StateMachine sm, ActionListener al) {
ConnectionRequest connectionRequest = new ConnectionRequest() {
#Override
protected void readResponse(InputStream input) throws IOException {
JSONParser jSONParser = new JSONParser();
Map<String, Object> parsedData = jSONParser.parseJSON(new InputStreamReader(input));
responses = (ArrayList<Map<String, Object>>) parsedData.get("root");
Display.getInstance().callSerially(new Runnable() {
#Override
public void run() {
al.actionPerformed(null);
}
});
}
#Override
protected void handleException(Exception err) {
//System.out.println("handleException " + err);
}
#Override
protected void handleIOException(IOException err) {
//toastbar doesnt work here but dialogBox works, if showForm("Groups") is used, toastbar is also shown along with dialogbox
//ToastBar.showErrorMessage("Please check your network connection", 4000);
//sm.showForm("Groups", null);
Dialog.show("", "Please check your network connection", "ok", null);
}
};
AllUrl allUrl = new AllUrl();
connectionRequest.setUrl(allUrl.groupsMenu);
InfiniteProgress ip = new InfiniteProgress();
Dialog d = ip.showInifiniteBlocking();
connectionRequest.setDisposeOnCompletion(d);
NetworkManager.getInstance().addToQueue(connectionRequest);
}
In connectionRequest code above, if there is no network connection, it gives IoException: unreachable which is handled by handleIOException method below but if i use dialogBox there, it works. Instead toastbar doesnt work there, why is that? If I use showForm("Form",null) along with dialogBox and toastbar, the same form is called repeatedly and toastbar is also seen with dialog box appearing multiple times.
2)postForm(Form f) method
connectionGroup = new GroupConnection();
connectionGroup.groupConnection(StateMachine.this, new ActionListener() {
#Override
public void actionPerformed(ActionEvent evt) {
//checking connectionGroup.responses == null doesnt work since the connectionRequest gives IOException if no network.So Toastbar doesnt work here.
if (connectionGroup.responses == null) {
ToastBar.showErrorMessage("Please check your network connection", 4000);
}
if (connectionGroup.responses != null) {
for (Map<String, Object> element : connectionGroup.responses) {
String tableName = (String) element.get("name");
TextArea nameLabel = new TextArea(tableName.toUpperCase());
f.add(singleRowContainerr);
}
}
}
}
In postForm method above, I used to check if there is network connection or not by checking: if (connectionGroup.responses == null) { do smth...}, it doesnt work here since the connectionRequest gives IoException & doesnt run code inside connectionRequest.
How to solve this problem? I have to show "check connection" in toastBar and a label with text "no connection" as well. PS I need to put all my components & connectionRequest in postForm since I need to go to the form before connectionRequest is called.

Answer 1

ToastBar is bound to a specific Form whereas Dialog will block any form to show itself.
You've set the ToastBar to one form then transitioned to another Form.