# 2. FSTT SDK features

## Init gateway

Contact us for get `app_id` & `secret_key`

{% tabs %}
{% tab title="Java" %}

```java
STTManager.initGateway("your_app_id", "your_secret_key", new IInitGatewayCallback() {
    @Override
    public void onSuccess() {

    }

    @Override
    public void onFail(@Nullable AppException error) {

    }
});
```

{% endtab %}

{% tab title="Kotlin" %}

```java
STTManager.initGateway(appId, secretKey, object : IInitGatewayCallback {
    override fun onSuccess() {
    
    }

    override fun onFail(error: AppException?) {

    }
})
```

{% endtab %}
{% endtabs %}

## Register SDK Callback

**After registration, the SDK will return the corresponding status in the callback**

| Status      | Description                                            |
| ----------- | ------------------------------------------------------ |
| onStart     | Called at start record                                 |
| onRecording | Called while in process recording                      |
| onSuccess   | Called when completed record process and return result |
| onFail      | Called when an error occurs in process recording       |

{% tabs %}
{% tab title="Java" %}

```java
STTManager.registerSTTCallback(new ISTTCallback() {
    @Override
    public void onStart() {
        
    }

    @Override
    public void onRecording() {

    }

    @Override
    public void onFail(@Nullable AppException error) {

    }

    @Override
    public void onSuccess(@NonNull String result) {

    }
});
```

{% endtab %}

{% tab title="Kotlin" %}

```java
STTManager.registerSTTCallback(object : ISTTCallback {
    override fun onStart() {

    }

    override fun onRecording() {
    
    }

    override fun onFail(error: AppException?) {

    }

    override fun onSuccess(result: String) {

    })
})
```

{% endtab %}
{% endtabs %}

## Start STT

* Used to start record for STT
* When successful start, the SDK starts entering the recording state, it will be called on `onStart()` in callback. Handling start record successfully here.
* When start record fails, it will be processed at callback `onFail()` in callback.

{% tabs %}
{% tab title="Java" %}

```java
STTManager.startSTT();
```

{% endtab %}

{% tab title="Kotlin" %}

```java
STTManager.startSTT()
```

{% endtab %}
{% endtabs %}

## Stop STT

* Used to stop record and process record to text result
* When successful, the SDK will be return text result on `onSuccess()` in callback. Handling stop record successfully here.
* When fails, it will be processed at callback `onFail()` in callback.

{% tabs %}
{% tab title="Java" %}

```java
STTManager.stopSTT();
```

{% endtab %}

{% tab title="Kotlin" %}

```java
STTManager.stopSTT()
```

{% endtab %}
{% endtabs %}