Flutter - Android 如何获取GAID

本文记录一下如何在Flutter 中获取GAID，也就是google的广告id：

参考网站：

Google play services version info:

版本資訊 | Google Play services | Google for Developers

Credential Manager API (play-services-identity-credentials) 的最新更新包含以下變更：

https://developers.google.cn/android/guides/releases?hl=zh-tw

1.声明获取广告id的权限：

打开 android/app/src/main/AndroidManifest.xml 文件，确保你已声明获取广告 ID 所需的权限：


<uses-permission android:name="com.google.android.gms.permission.AD_ID" />

2.添加谷歌广告id的依赖：

添加依赖：在 android/app/build.gradle 文件中，确保你有 Google Play Services 的依赖：


dependencies {
    implementation 'com.google.android.gms:play-services-ads-identifier:17.0.0'
}

3.在Android原生代码中获取谷歌id：


package com.example.gaid_example

import android.os.Bundle
import com.google.android.gms.ads.identifier.AdvertisingIdClient
import io.flutter.embedding.android.FlutterActivity
import io.flutter.plugin.common.MethodChannel
import io.flutter.plugins.GeneratedPluginRegistrant
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext

class MainActivity: FlutterActivity() {
    private val CHANNEL = "com.example.gaid_example/gaid"

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        GeneratedPluginRegistrant.registerWith(flutterEngine!!)

        MethodChannel(flutterEngine!!.dartExecutor, CHANNEL).setMethodCallHandler { call, result ->
            if (call.method == "getGAID") {
                getGAID(result)
            } else {
                result.notImplemented()
            }
        }
    }

    private fun getGAID(result: MethodChannel.Result) {
        GlobalScope.launch(Dispatchers.IO) {
            try {
                val adInfo = AdvertisingIdClient.getAdvertisingIdInfo(applicationContext)
                val gaid = adInfo.id
                withContext(Dispatchers.Main) {
                    if (gaid != null) {
                        result.success(gaid)
                    } else {
                        result.error("GAID_ERROR", "Failed to retrieve GAID", null)
                    }
                }
            } catch (e: Exception) {
                withContext(Dispatchers.Main) {
                    result.error("GAID_ERROR", "Failed to retrieve GAID", e.message)
                }
            }
        }
    }
}

4.在flutter侧调用Method：


import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  static const platform = MethodChannel('com.example.gaid_example/gaid');

  Future<void> _getGAID() async {
    try {
      final String gaid = await platform.invokeMethod('getGAID');
      print('GAID: $gaid');
    } on PlatformException catch (e) {
      print("Failed to get GAID: '${e.message}'.");
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('GAID Example'),
        ),
        body: Center(
          child: ElevatedButton(
            onPressed: _getGAID,
            child: Text('Get GAID'),
          ),
        ),
      ),
    );
  }
}