如何通过Dagger2提供GoogleApiClient依赖关系？ [英] How do you provide a GoogleApiClient dependency with Dagger2?

问题描述

我已经开始使用Dagger2来管理依赖关系，并且试图了解如何使用DI提供单例GoogleApiClient。这样做的动机是：

I've started using Dagger2 to manage dependencies and I'm trying to understand how I can use DI to provide a singleton GoogleApiClient. The motivations for this are:

• 减少样板代码：多个活动和片段需要GoogleApiClient


• 提高可测试性：目前，这些活动和片段尚未得到很好的测试

• reduce boilerplate code: multiple Activities & Fragments require a GoogleApiClient
• improve testability: currently these Activities and Fragments are not well tested

我想在Application范围内提供Singleton GoogleApiClient。

I want to provide a Singleton GoogleApiClient at the Application scope.

如何处理回调？是否选择自动管理或手动管理的连接，必须处理一些回调：

How do you handle callbacks? Whether you choose an auto-managed or manually-managed connection, there are some callbacks that must be handled:

• GoogleApiClient.ConnectionCallbacks（仅手动）


• GoogleApiClient.OnConnectionFailedListener（两者）

推荐答案

您可以使用注入来创建客户端

You can use the injection to create the client

 @Provides
    @Singleton
    GoogleApiClient providesGoogleApiClient(Context context) {
            return new GoogleApiClient.Builder(context)
                    .addApi(Places.GEO_DATA_API)
                    .addApi(LocationServices.API)
                    .build();
        }

然后管理您活动的回调

@Inject GoogleApiClient mGoogleApiClient;



if (mGoogleApiClient != null) {  mGoogleApiClient.registerConnectionCallbacks(this);            mGoogleApiClient.registerConnectionFailedListener`(this);
}

我希望这会对您有所帮助。

I hope this might help you.

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