Flutter Call Google APIs with an App Restricted API Key

A Flutter plugin for getting the headers required to call Google APIs with an app restricted API key.

Getting Started 

Add this to your project's pubspec.yaml file:

dependencies:
  google_api_headers: ^3.7.0

Usage

Depending on the platform (iOS or Android), the function will return the required key and value pairs for calling Google APIs with keys that are restricted to an iOS or Android app.

import 'package:google_api_headers/google_api_headers.dart';

final headers = await GoogleApiHeaders().getHeaders();

Use this package as a library

Depend on it

Run this command:

With Flutter:

 $ flutter pub add google_api_headers

This will add a line like this to your package's pubspec.yaml (and run an implicit flutter pub get):

dependencies:
  google_api_headers: ^3.7.0

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

Import it

Now in your Dart code, you can use:

import 'package:google_api_headers/google_api_headers.dart';

Example/lib/main.dart

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:google_api_headers/google_api_headers.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  MyAppState createState() => MyAppState();
}

class MyAppState extends State<MyApp> {
  Map<String, String>? _headers;

  @override
  void initState() {
    super.initState();
    getHeaders();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Text(
            'Google API headers: ${_headers.toString()}',
            textAlign: TextAlign.center,
          ),
        ),
      ),
    );
  }

  Future<void> getHeaders() async {
    final headers = await const GoogleApiHeaders().getHeaders();
    setState(() => _headers = headers);
  }
}

View on GitHub: https://github.com/zeshuaro/google_api_headers 

#flutter