# How to Use the SDK

## Adding the SDK

1. Navigate to `app` -> `libs` -> right-click -> select `Open in Finder`.

   ```{image} ../images/image3.png
   :width: 700px
   ```

1. In the popup window, select the `libs` folder and paste `A24D-SDK.aar` into this folder.  
   `A24D-SDK.aar` will then appear under the project's `libs`.

   ```{image} ../images/image9.png
   :width: 700px
   ```    

1. Double-click `build.gradle`.

   ```{image} ../images/image10.png
   :width: 350px
   ```

1. Import the library in the dependencies section.  
   Then click `Sync Now` to synchronize the project.

   ```{image} ../images/image11.png
   :width: 700px
   ```

1. Once the synchronization is successful, it will be displayed as below.  
   The SDK is now added.

   ```{image} ../images/image12.png
   :width: 350px
   ```

## Using the SDK

Reference the library in the class using the `import` statement.

```java
import jp.co.asterisk.asreader.a24d.sdk.AsReader;
```

Create and initialize the `AsReader` object.

```java
AsReader.getInstance().initialize(getApplicationContext(), ConnectionType.USB);
```

Implement `DeviceManagerCallback` to execute other commands after a successful connection.

```java
AsReader.getInstance().getDeviceManager().setCallback(new DeviceManagerCallback() {
    @Override
    public void onConnect(boolean isConnect) {

    }

    @Override
    public void onBatteryStateReceived(int battery) {

    }

    @Override
    public void onTriggerEventReceived(DeviceConst.DeviceTriggerEvent event){

    }

    @Override
    public void onDeviceManagerError(AsReaderError.ErrorCode code) {

    }
});
```

Implement `BarcodeManagerCallback` to receive barcode decoding results via callback.

```java
AsReader.getInstance().getBarcodeManager().setCallback(new BarcodeManagerCallback() {
    @Override
    public void onReceivedBarcodeDecodeData(String decodeData, Map<String, String> parameter) {
        
    }

    @Override
    public void onBarcodeManagerError {

    }
});
```

Start barcode decoding:

```java
if (AsReader.getInstance().getDeviceManager().isConnected()) {
    AsReader.getInstance().getBarcodeManager().startDecode();
}
```