a.導入包

 implementation 'com.google.android.gms:play-services-analytics:18.0.1'
 implementation 'com.android.installreferrer:installreferrer:2.2'

b.核心代碼
google文檔

  private lateinit var sharedPreference: SharedPreferences
  private lateinit var referrerClient: InstallReferrerClient
  private val refererKey = "global_referer_key"

  private fun initReferer() {
        sharedPreference = getSharedPreferences("MainActivity", Context.MODE_PRIVATE)
        if (sharedPreference.contains(refererKey)) {
            val referrerUrl = sharedPreference.getString(refererKey, "")
              Log.i("ZHP", "referrerUrl:「$referrerUrl」")
        }
        referrerClient = InstallReferrerClient.newBuilder(this).build()
        referrerClient.startConnection(object : InstallReferrerStateListener {
            override fun onInstallReferrerSetupFinished(responseCode: Int) {
                when (responseCode) {
                    InstallReferrerClient.InstallReferrerResponse.OK -> {
                        val response: ReferrerDetails = referrerClient.installReferrer
                        val referrerUrl = response.installReferrer
                        Log.i("ZHP", "referrerUrl:「$referrerUrl」")
                    }

                    InstallReferrerClient.InstallReferrerResponse.FEATURE_NOT_SUPPORTED -> {
                        // API not available on the current Play Store app.
                        Log.i("ZHP", "referrerUrl:organic：FEATURE_NOT_SUPPORTED")
                    }

                    InstallReferrerClient.InstallReferrerResponse.SERVICE_UNAVAILABLE -> {
                        // Connection couldn't be established.
                        Log.i("ZHP", "referrerUrl:organic：SERVICE_UNAVAILABLE")
                    }
                }
            }

            override fun onInstallReferrerServiceDisconnected() {
                // Try to restart the connection on the next request to
                // Google Play by calling the startConnection() method.
                Log.i("ZHP", "referrerUrl:organic：onInstallReferrerServiceDisconnected")
            }
        })
    }

AndroidManifest.xml配置

        <activity>
              ...
        </activity>
        <service android:name="com.google.analytics.tracking.android.CampaignTrackingService" />
        <receiver
            android:name="com.google.analytics.tracking.android.CampaignTrackingReceiver"
            android:exported="true">
            <intent-filter>
                <action android:name="com.android.vending.INSTALL_REFERRER" />
            </intent-filter>
        </receiver>

c 測試
代碼在google的官網中都有介紹，關鍵說下測試流程

1. 創(chuàng)建一個測試鏈接

https://play.google.com/store/apps/details?id=<com.xx.xx>  //yourAppId
&referrer=utm_source%3Dgoogle%26utm_medium%3Dcpc%26utm_term%3Dpodcast%252Bapps%26utm_content%3DdisplayAd1%26utm_campaign%3Dpodcast%252Bgeneralkeywords

2. 網頁打開測試鏈接，正確彈出你的app頁面
3. 點擊在google play中打開（記得提前卸載app）
4. 在google play下載頁面，選擇adb或者as安裝debug包

    adb install -r app-debug.apk 

5. 安裝成功后在google play頁面點擊啟動

備注：如果google play的賬號之前測訂閱等問題被加入為測試賬號，要創(chuàng)建一個新的google賬號來測試，不然refererUrl還是拿不到