After the ads-installreferrer SDK is integrated, you can use related APIs to obtain install referrer information.
| Return type | Method name |
| InstallReferrerStateListener | Callback API for service connection. After the install referrer service is connected, the onInstallReferrerSetupFinished(int) method of this listener is called. |
| InstallReferrerClient | Abstract class used to obtain install referrer information. |
| InstallReferrerClient.Builder | Builder class used to create an InstallReferrerClient instance. |
| ReferrerDetails | Describes the install referrer information. |