使用Google Play自定义应用API上传APK：账号ID及服务账号获取疑问

Got it, let's break this down step by step to get you past this roadblock with the Google Play Custom App API. Here's exactly what you need to do:

First, you need a service account to authenticate API calls. Here's how to set it up:

• Head to the Google Cloud Console, select your existing project (or create a new one if you don't have one).
• Navigate to IAM & Admin > Service Accounts.
• Click Create Service Account, fill in a name and description, then hit Create and Continue.
• Assign the Play Custom App Publishing role (or the more granular Custom App Publisher role) to this service account, then click Continue > Done.
• Go back to the service accounts list, find the one you just created, click Keys > Add Key > Create New Key. Choose JSON format, download the key file, and store it somewhere secure—you'll need it later.

A service account won't work unless it's linked to your Play Developer account:

• Open the Google Play Console with your developer credentials.
• Go to Settings > Users and permissions > Invite new users.
• Enter the email address of your service account (it looks like [name]@[project-id].iam.gserviceaccount.com).
• Assign the Custom App Publisher permission, then send the invite. Wait for the invite to be accepted (it happens automatically for service accounts).

That URL from the docs is for authorizing the service account to access your Play account and retrieve the account ID:

• Replace serviceAccountEmail in the URL with your service account's email, and callbackUrl with any valid URL (even a local one like http://localhost:8080/callback works—you just need to extract the accountId from the redirect).
• Open the modified URL in a browser, log in with your Play Developer account, and grant permission. After redirecting, look at the URL in your browser's address bar—you'll see a accountId parameter. Copy that value; this is the ID you need for your API calls.

Here's a complete Java code example that ties everything together, using the GoogleCredential you mentioned:

import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.gson.GsonFactory;
import com.google.api.services.playcustomapp.PlayCustomApp;
import com.google.api.services.playcustomapp.model.CustomApp;

import java.io.FileInputStream;
import java.io.IOException;
import java.util.Collections;

public class CustomAppUploader {
    public static void main(String[] args) throws IOException {
        // Replace these with your own values
        String serviceAccountKeyPath = "/path/to/your/service-account-key.json";
        String playAccountId = "your-copied-account-id";
        String apkFilePath = "/path/to/your/app.apk";

        // Build the credential using your service account key
        GoogleCredential credential = GoogleCredential.fromStream(new FileInputStream(serviceAccountKeyPath))
                .createScoped(Collections.singleton("https://www.googleapis.com/auth/playcustomapp"));

        // Initialize the Play Custom App API client
        PlayCustomApp playCustomApp = new PlayCustomApp.Builder(
                new NetHttpTransport(),
                GsonFactory.getDefaultInstance(),
                credential
        ).setApplicationName("Your App Name").build();

        // Define your custom app details
        CustomApp customApp = new CustomApp().setTitle("My Custom App");

        // Upload the APK and create the custom app
        playCustomApp.accounts().customApps().create(
                playAccountId,
                customApp,
                new FileContent("application/vnd.android.package-archive", new java.io.File(apkFilePath))
        ).execute();

        System.out.println("Custom app uploaded successfully!");
    }
}

Quick Notes to Avoid Headaches #

• Make sure you've enabled the Play Custom App API in the Google Cloud Console (search for it in the API Library and toggle it on).
• If you run into permission errors, double-check that your service account has the right roles in both Google Cloud Console and Play Console.
• You don't need a running server for the callback URL—just copy the accountId from the address bar after the redirect.

内容的提问来源于stack exchange，提问作者desi Joe