如何在Flutter中使用Google API？ [英] How to use Google API in flutter?

问题描述

我想在Flutter应用中使用Google Cloud Natural Language，我得到了 Google API程序包
这适用于抖动， Google API_AUTH 依赖性适用于0.2.1。
如何实现它们？

I want to use Google Cloud Natural Language in my Flutter app,I got Google API package This works for flutter and theGoogle API_AUTH dependence is working for 0.2.1. How do I implement them ?

推荐答案

这对我有用：

使用软件包 google_sign_in 登录，然后从中获取身份验证标头：

Logging in using package google_sign_in and then get auth headers from it:

import 'package:google_sign_in/google_sign_in.dart'
    show GoogleSignIn, GoogleSignInAccount;

import 'package:googleapis/people/v1.dart'
    show ListConnectionsResponse, PeopleApi;

useGoogleApi() async {
  final _googleSignIn = new GoogleSignIn(
    scopes: [
      'email',
      'https://www.googleapis.com/auth/contacts.readonly',
    ],
  );

  await _googleSignIn.signIn();

  final authHeaders = _googleSignIn.currentUser.authHeaders;

  // custom IOClient from below
  final httpClient = GoogleHttpClient(authHeaders); 

  data = await PeopleApi(httpClient).people.connections.list(
      'people/me',
      personFields: 'names,addresses',
      pageToken: nextPageToken,
      pageSize: 100,
  );
}

这是自定义 IOClient 实现，可将auth标头自动添加到每个请求。 googleapis调用支持传递自定义HTTP客户端（而不是默认值）（请参见上文）

This is a custom IOClient implementation that automatically adds the auth headers to each request. The googleapis call support passing a custom HTTP client to be used instead of the default (see above)

import 'package:http/io_client.dart';
import 'package:http/http.dart';

class GoogleHttpClient extends IOClient {
  Map<String, String> _headers;

  GoogleHttpClient(this._headers) : super();

  @override
  Future<StreamedResponse> send(BaseRequest request) =>
      super.send(request..headers.addAll(_headers));

  @override
  Future<Response> head(Object url, {Map<String, String> headers}) =>
      super.head(url, headers: headers..addAll(_headers));

}

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