我需要將 clickatell.com 中的一種 SMS 方式實作到我的 Flutter 應用程式中，并且它們具有 HTTP API。在實作之前，我想通過flutter測驗API，不知道如何創建HTTP請求。當我從瀏覽器嘗試 HTTP API 時，它可以作業，但 Flutter 不能。HTTP 看起來像這樣：“https://platform.clickatell.com/messages/http/send?apiKey=FeKBZwZ3T2q3BNcjsJvHCA==&to=12345678&content=Test message text”
我試圖在顫振中使用 HTTP 創建帖子，并對 JSON 進行編碼，因為我在檔案中發現它是 JSON，但它不起作用。另外，我在 android manifest 檔案中添加了 internet 權限，它看起來像這樣：
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.darkomilosevic.sms_test">
<uses-permission android:name="android.permission.INTERNET" />
<application
android:label="SMS test"
android:name="${applicationName}"
android:icon="@mipmap/ic_launcher">
<activity
android:name=".MainActivity"
android:exported="true"
android:launchMode="singleTop"
android:theme="@style/LaunchTheme"
android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
android:hardwareAccelerated="true"
android:windowSoftInputMode="adjustResize">
<!-- Specifies an Android theme to apply to this Activity as soon as
the Android process has started. This theme is visible to the user
while the Flutter UI initializes. After that, this theme continues
to determine the Window background behind the Flutter UI. -->
<meta-data
android:name="io.flutter.embedding.android.NormalTheme"
android:resource="@style/NormalTheme"
/>
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<!-- Don't delete the meta-data below.
This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
<meta-data
android:name="flutterEmbedding"
android:value="2" />
</application>
</manifest>
我的飛鏢代碼如下所示：
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'SMS test',
theme: ThemeData(
// This is the theme of your application.
//
// Try running your application with "flutter run". You'll see the
// application has a blue toolbar. Then, without quitting the app, try
// changing the primarySwatch below to Colors.green and then invoke
// "hot reload" (press "r" in the console where you ran "flutter run",
// or simply save your changes to "hot reload" in a Flutter IDE).
// Notice that the counter didn't reset back to zero; the application
// is not restarted.
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Send SMS'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
// This widget is the home page of your application. It is stateful, meaning
// that it has a State object (defined below) that contains fields that affect
// how it looks.
// This class is the configuration for the state. It holds the values (in this
// case the title) provided by the parent (in this case the App widget) and
// used by the build method of the State. Fields in a Widget subclass are
// always marked "final".
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final String phoneNumber = "12345678";
final String apiKey = "FeKBZwZ3T2q3BNcjsJvHCA";
final String smsSubject = "Test sms:";
Future<http.Response> sendSMS(String messageText) async {
var url = Uri.parse('https://platform.clickatell.com/messages/http/send');
return await http.post(url,
headers: <String, String>{
'Content-Type': 'application/json; charset=UTF-8'
},
body: jsonEncode(<String, String>{
'apiKey': apiKey,
'to': phoneNumber,
'content': 'test $smsSubject $messageText'
}));
}
Future sendTextMessage() async {
await sendSMS(myController.text);
setState(() {
myController.clear();
});
}
final myController = TextEditingController();
@override
void dispose() {
myController.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
// This method is rerun every time setState is called, for instance as done
// by the _incrementCounter method above.
//
// The Flutter framework has been optimized to make rerunning build methods
// fast, so that you can just rebuild anything that needs updating rather
// than having to individually change instances of widgets.
return Scaffold(
appBar: AppBar(
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text(widget.title),
),
body: Center(
// Center is a layout widget. It takes a single child and positions it
// in the middle of the parent.
child: Column(
// Column is also a layout widget. It takes a list of children and
// arranges them vertically. By default, it sizes itself to fit its
// children horizontally, and tries to be as tall as its parent.
//
// Invoke "debug painting" (press "p" in the console, choose the
// "Toggle Debug Paint" action from the Flutter Inspector in Android
// Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
// to see the wireframe for each widget.
//
// Column has various properties to control how it sizes itself and
// how it positions its children. Here we use mainAxisAlignment to
// center the children vertically; the main axis here is the vertical
// axis because Columns are vertical (the cross axis would be
// horizontal).
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
TextField(
controller: myController, enableInteractiveSelection: true)
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: sendTextMessage,
tooltip: 'Send',
child: const Icon(Icons.sms),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
uj5u.com熱心網友回復：
只需嘗試 GET 請求。我認為您的 API 不支持 POST 請求。我還檢查了 POST 請求，但它給出了 405 錯誤。
void _onPressed() async {
try {
final response = await http.get(
Uri.parse(
'https://platform.clickatell.com/messages/http/send?apiKey=FeKBZwZ3T2q3BNcjsJvHCA==&to=12345678&content=Test message text'),
);
final responseData = jsonDecode(response.body);
log(responseData.toString());
} catch (e) {
log(e.toString());
}}
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