Have both GMS and HMS in the project

问题

How does one go about having both Google Mobile Services and Huawei Mobile Services in the app?

Being that Huawei have lost the license over GMS, it seems we need to replace all the GMS services used in the apps with Huawei provided ones. What would a "best practice" be for this? Use flavours and somehow handle each class individually, or copy paste the project and start replacing? Or ... better yet, is there a way to perhaps have both and ... somehow let the app decide which service to use based on the device it's on? Obviously the last one would presume an increase in the apk file size.

Any ideas?

回答1:

While it really depends on architecture of your app, there are 2 reasonable alternatives so far;

Using flavors and variants, this will give you more flexibility. Establishing the architecture and implementation would be relatively more time consuming yet it is a clean approach providing a nice isolation of code. Since those ecosystems has different markets (AppGallery for Huawei), with flavors and variants, it is quite handy to establish separate build pipelines. It gives you the ability of maintaining different apk for different ecosystem
Using a wrapper/bridge approach. Simply, implement the wrapper classes to decide and forward requests to corresponding endpoints. With this approach, it is possible to maintain single for both markets. HMS actually provides a robust tool for this. It analyzes the code which depends on GMS, then automatically generates wrapper classes and converts the original code to use wrapper classes. It is called "HMS Converter" and has an Android Studio plugin even. https://developer.huawei.com/consumer/en/huawei-toolkit/

回答2:

Before I answer your question here is short explanation what is HMS and GMS:

HMS stands for Huawei Mobile Services
GMS stands for Google Mobile Services

You can publish your app (which is using Google's libraries) in Huawei's app store (named AppGallery) but this app will be visible and available to download only for Huawei's devices containing HMS+GMS (all devices till 2020 had HMS and GMS).

However the newer phones i.e. Mate 30 series, P40 - will have installed only HMS. So if you want to make your app visible for all Huawei devices (HMS+GMS and HMS) then you will have to implement in you app function for detecting what service is on on user's device. It will decide what proper function to call (i.e initialize instance of Huawei Maps or Google Maps).

Here is the code for detecting HMS and GMS:

For Huawei Mobile Services we use:

HuaweiApiAvailability.getInstance().isHuaweiMobileServicesAvailable(context);

https://developer.huawei.com/consumer/en/doc/development/HMS-References/huaweiapiavailability

For Google Mobile Services we use:

GoogleApiAvailability.getInstance().isGooglePlayServicesAvailable(context);

https://developers.google.com/android/reference/com/google/android/gms/common/GoogleApiAvailability

Here is the code how to properly handle detecting HMS and GMS:

public static boolean isHmsAvailable(Context context) {
    boolean isAvailable = false;
    if (null != context) {
        int result = HuaweiApiAvailability.getInstance().isHuaweiMobileServicesAvailable(context);
        isAvailable = (com.huawei.hms.api.ConnectionResult.SUCCESS == result);
    }
    Log.i(TAG, "isHmsAvailable: " + isAvailable);
    return isAvailable;
}

public static boolean isGmsAvailable(Context context) {
    boolean isAvailable = false;
    if (null != context) {
        int result = GoogleApiAvailability.getInstance().isGooglePlayServicesAvailable(context);
        isAvailable = (com.google.android.gms.common.ConnectionResult.SUCCESS == result);
    }
    Log.i(TAG, "isGmsAvailable: " + isAvailable);
    return isAvailable;
}

AFAIK these classes (HuaweiApiAvailability/GoogleApiAvailability) are available if you implement any of the Huawei's kit/Google's lib.

来源：https://stackoverflow.com/questions/59974428/have-both-gms-and-hms-in-the-project

标签

android

google-play-services

hms