অনিরাপদ সম্প্রচার রিসিভার

interface EventCompletionListener {
    fun onEventComplete(data: String)
}

public interface EventCompletionListener {
    public void onEventComplete(String data);
}

class SecureTask(private val listener: EventCompletionListener?) {
    fun executeTask() {
        // Do some work...

        // Notify that the event is complete
        listener?.onEventComplete("Some secure data")
    }
}

public class SecureTask {

    final private EventCompletionListener listener;

    public SecureTask(EventCompletionListener listener) {
        this.listener = listener;
    }

    public void executeTask() {
        // Do some work...

        // Notify that the event is complete
        if (listener != null) {
            listener.onEventComplete("Some secure data");
        }
    }
}

class MainActivity : AppCompatActivity(), EventCompletionListener {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val secureTask = SecureTask(this)
        secureTask.executeTask()
    }

    override fun onEventComplete(data: String) {
        // Handle event completion securely
        // ...
    }
}

public class MainActivity extends AppCompatActivity implements EventCompletionListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        SecureTask secureTask = new SecureTask(this);
        secureTask.executeTask();
    }

    @Override
    public void onEventComplete(String data) {
        // Handle event completion securely
        // ...
    }
}