# ServiceLifecycleObserver

Observer for Service lifecycle events.

Use this interface to track lifecycle changes of SDK Services.

## ServiceLifecycleObserver API

### `onServiceCreated`

> ```java
> void onServiceCreated(Class<? extends Service> cls)
> ```
>
> Called when a Service used by the SDK is created. `cls` is the Service class that was created.

### `onServiceDestroyed`

> ```java
> void onServiceDestroyed(Class<? extends Service> cls)
> ```
>
> Called when a Service used by the SDK is destroyed. `cls` is the Service class that was destroyed.

### `onForegroundStarted`&#x20;

> <pre class="language-java"><code class="lang-java"><strong>void onForegroundStarted(Class&#x3C;? extends Service> cls)
> </strong></code></pre>
>
> Called when a Service used by the SDK starts running in the foreground. `cls` is the Service class that started foreground execution.

### `onForegroundStopped`

> ```java
> void onForegroundStopped(Class<? extends Service> cls)
> ```
>
> Called when a Service used by the SDK stops running in the foreground. `cls` is the Service class that stopped foreground execution.

## Threading

> Observer callbacks are posted on the main thread.

## Example

```java
ServiceLifecycleObserver observer = new ServiceLifecycleObserver() {
    @Override
    public void onServiceCreated(Class<? extends Service> cls) {
        // Service created.
    }

    @Override
    public void onServiceDestroyed(Class<? extends Service> cls) {
        // Service destroyed.
    }

    @Override
    public void onForegroundStarted(Class<? extends Service> cls) {
        // Foreground started.
    }

    @Override
    public void onForegroundStopped(Class<? extends Service> cls) {
        // Foreground stopped.
    }
};

SdkDiagnostics diagnostics =
        new SdkDiagnostics.Builder()
                .serviceLifecycleObserver(observer)
                .build();

SentianceOptions options =
        new SentianceOptions.Builder(context)
                .diagnostics(diagnostics)
                .build();
```


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