Add two in Function to a button Flutter - flutter

Question

how can I add two function to a single button?
I have a button that sends a request to a server and I would like to add a Dialog after sending the request... I tried this:
onPressed: () {
_makePostRequest();
showAlertDialog(context);
},
But still not working...
The post code:
_makePostRequest() async {
final url = Uri.parse('http://127.0.0.1/API');
final headers = {"Content-type": "application/json"};
final json = '{"id": "1", "status": "1"}';
final response = await post(url, headers: headers, body: json);
final statusCode = response.statusCode;
final body = response.body;
}
The Show Dialog code:
void showAlertDialog(BuildContext context) {
Widget okButton = TextButton(
child: Text("OK"),
onPressed: () {},
);
AlertDialog alert = AlertDialog(
title: Text("PMZ Label Print"),
content: Text("Label is printing..."),
actions: [
okButton,
],
);
showDialog(
context: context,
builder: (BuildContext context) {
return alert;
},
);
}

Answer 1

Try to below code
Your Button
onPressed:(){
_makePostRequest();
}
Your API Call
_makePostRequest() async {
final url = Uri.parse('http://127.0.0.1/API');
final headers = {"Content-type": "application/json"};
final json = '{"id": "1", "status": "1"}';
final response = await post(url, headers: headers, body: json);
final statusCode = response.statusCode;
final body = response.body;
//your alert function call
if (response.statusCode == 200) {
showAlertDialog(context);
} else {
print(
"Error",
);
}
}
I have try above code and my code is working

Answer 2

you just need to add async on onPressed.
onPressed: ()async {
await _makePostRequest();
showAlertDialog(context);
},

Answer 3

_makePostRequest is of type Future so you can use 2 ways :
First one:
onPress:(){
_makePostRequest().then((v){
showAlertDialog(context);
});
}
Second one:
onPress:()await {
await YourFunction();
showAlertDialog(context);
}