Does not appear the output in Debug console
Answer a question my code : import 'package:http/http.dart' as http; import 'dart:convert'; void main()async { var data =await fatchalbum(); for(int i =0; i>100;i++){ print(data[i]["userId"]); print(d
Answer a question
my code :
import 'package:http/http.dart' as http;
import 'dart:convert';
void main()async {
var data =await fatchalbum();
for(int i =0; i>100;i++){
print(data[i]["userId"]);
print(data[i]["id"]);
print(data[i]["title"]);
}
}
Future fatchalbum()async{
final url ="https://jsonplaceholder.typicode.com/albums";
final res = await http.get(Uri.parse(url));
if(res.statusCode==200){
var obj = json.decode(res.body);
return obj;
}else{
throw Exception("error");
}
}
If i write in the "main function " print("hi");
it can run in debuge console just "hi"
It does not display the rest of the data
when i run the code , This error appears to me in Debuge console
Failed to save Chrome preferences: FileSystemException: Cannot open file, path = 'C:\Users\dell\AppData\Local\Temp\flutter_tools.ab04b1f8\flutter_tools_chrome_device.49e73a42\Default\Cache\data_0' (OS Error: The process cannot access the file because it is being used by another process.
, errno = 32)
Sometimes when I press stop then press Run&Debuge It just shows me, it doesn't show me The ouput I want:
This app is linked to the debug service: ws://127.0.0.1:55071/6_DbR0EpDJg%3D/ws
Launching lib\main.dart on Edge in debug mode...
lib\main.dart:1
Debug service listening on ws://127.0.0.1:55071/6_DbR0EpDJg=/ws
Running with sound null safety
Connecting to VM Service at ws://127.0.0.1:55071/6_DbR0EpDJg=/ws
Answers
basically your fetchalbum method is returning a List of Maps so the best approach to print each element of List is to use "For in" loop heres the code you should use:-
for (var element in data){
print(var["userId"]);
print(var["id"]);
print(var["title"]);
}
You are doing a little mistake in you approach to print data, you are giving conding in your loop that when i is greater than 100 i > 100, thats basically returns false thats why it doesnt prints any thing.
second approach to print data is :-
for(int i = o; i <data.length ; i++){
//prints from api
}
or
for(int i = 0; i <100 ; i++){
//prints from api }
更多推荐
所有评论(0)