## Get customer's events --- This method retrieves events for an authenticated customer. This method requires customer authentication. **Method name:** Client.getEvents(clientEventsQuery) **Declaration:**
```Java public static IDataApiCall> getEvents(ClientEventsQuery clientEventsQuery) ```
```Kotlin fun getEvents(clientEventsQuery:ClientEventsQuery):IDataApiCall> ```
**Parameters:** | Parameter | Type | Mandatory | Default | Description | | --- | --- | --- | --- | --- | | **clientEventsQuery** | ClientEventsQuery | yes | - | Object to create clientEvent query | **Return Value:** [IDataApiCall](/developers/mobile-sdk/method-reference/android/public-interfaces#idataapicall)> object to execute the request. **Example:**
```Java private IDataApiCall> getEventClientsCall; if (getEventClientsCall != null) getEventClientsCall.cancel(); getEventClientsCall = Client.getEvents(clientEventsQuery); getEventClientsCall.execute(({ this.onSuccess() }), ({ this.onFailure() }); ```
```Kotlin private val getEventClientsCall:IDataApiCall> if (getEventClientsCall != null) getEventClientsCall.cancel() getEventClientsCall = Client.getEvents(clientEventsQuery) getEventClientsCall.execute(({ this.onSuccess() }), ({ this.onFailure() }) ```
## Set custom identifier for events --- This method sets a custom identifier in the parameters of every event. You can pass a custom identifier to match your customers in our database. **Method name:** Tracker.setCustomIdentifier(customIdentifier) **Declaration:**
```java public static void setCustomIdentifier(String customIdentifier) ```
```kotlin fun setCustomIdentifier(customIdentifier:String) ```
**Parameters:** | Parameter | Type | Mandatory | Default | Description | | --- | --- | --- | --- | --- | | **customIdentifier** | String | yes | - | Client's custom identifier | **Return Value:** Void type method. **Example:**
```java Tracker.setCustomIdentifier(customIdentifier) ```
```kotlin Tracker.setCustomIdentifier(customIdentifier) ```
## Set custom email for events --- This method sets a custom email in the parameters of every event. You can pass a custom email to match your customers in our database. **Method name:** Tracker.setCustomEmail(customEmail) **Declaration:**
```java public static void setCustomEmail(String customEmail) ```
```kotlin fun setCustomEmail(customEmail:String) ```
**Parameters:** | Parameter | Type | Mandatory | Default | Description | | --- | --- | --- | --- | --- | | **customEmail** | String | yes | - | Customer's email | **Return Value:** Void type method. **Example:**
```java private void setCustomEmail(String customEmail) { Tracker.setCustomEmail(customEmail); } ```
```kotlin private fun setCustomEmail(customEmail:String) { Tracker.setCustomEmail(customEmail) } ```
## Send event --- This method sends an event.
DO NOT send `transaction.charge` events as custom events.
Transactions must be tracked with these endpoints: - [`/v4/transactions`](https://hub.synerise.com/api-reference/data-management#tag/Events/operation/CreateATransaction) (single transaction) - [`/v4/transactions/batch`](https://hub.synerise.com/api-reference/data-management#tag/Events/operation/BatchAddOrUpdateTransactions) (multiple transactions)
- The tracker caches and enqueues all your events locally, so they all will be sent eventually. - The API key must have the `API_BATCH_EVENTS_CREATE` permission from the **Events** group.
It also supports Android O's [Background Execution Limits](https://developer.android.com/about/versions/oreo/background.html). **Method name:** Tracker.send(event) **Declaration:**
```java public static void send(Event event) ```
```kotlin fun send(event:Event) ```
**Parameters:** | Parameter | Type | Mandatory | Default | Description | | --- | --- | --- | --- | --- | | **event** | Event | yes | - | Event object (e.g. `CustomEvent()` instance). | **Return Value:** Void type method. **Example:**
```java Tracker.send(new CustomEvent("my.action", "label")); ```
```kotlin Tracker.send(CustomEvent("my.action", "label")) ```
## Flush events from Tracker --- This method forces sending the events from the queue to the server.
The API key must have the `API_BATCH_EVENTS_CREATE` permission from the **Events** group.
**Method name:** Tracker.flush() **Declaration:**
```java public static void flush() ```
```kotlin fun flush() ```
**Parameters:** No parameters required. **Return Value:** Void type method. **Example:**
```java Tracker.flush(); ```
```kotlin Tracker.flush(); ```