How do you provide a GoogleApiClient dependency with Dagger2?

Question

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:

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

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

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 (manual only)
GoogleApiClient.OnConnectionFailedListener (both)

george_mx · Accepted Answer · 2016-03-21T04:44:40.717

7

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();
        }

And then manage the call backs on your activity

@Inject GoogleApiClient mGoogleApiClient;



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

I hope this might help you.

edited Mar 21 '16 at 04:44

answered Mar 17 '16 at 20:03

george_mx

376
3
20

Are `onResume()` and `onPause()` the correct place to register/unregister the listener? – sidecarcat Mar 19 '16 at 20:22
Your example provider method creates the client (not just the builder, as your wording suggests). – sidecarcat Mar 19 '16 at 20:26
@sidecarcat Yes you are right, it provides the client. The disconnect is normally is called on onStop() and onStart you can call connect – george_mx Mar 21 '16 at 04:44
Just want to add that if you wont to avoid boilerplate onStart/onStop you can just pass lifecycle ApiClient wrapper and let handle it there. – TheLibrarian May 18 '18 at 16:32
I am getting googleApiClient is not initialized, any ideas? – Pedro Varela May 18 '18 at 21:34

How do you provide a GoogleApiClient dependency with Dagger2?

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