胶子的魅力下降3.0.0 - 如何创建cusom插件(Gluon Charm down 3.0.0

如何在胶子魅力创建自定义插件下来3.0.0？或类似的东西。

我有包sk.ltorok.gluon.bluetooth.plugins，而该包包含两个类BluetoothServiceFactory和BluetoothService，这是代码：

package sk.ltorok.gluon.bluetooth.plugins;

import com.gluonhq.charm.down.DefaultServiceFactory;

public class BluetoothServiceFactory extends DefaultServiceFactory<BluetoothService> {

    public BluetoothServiceFactory() {
        super(BluetoothService.class);
    }  

}

...和隔壁班

package sk.ltorok.gluon.bluetooth.plugins;

import java.util.List;

public interface BluetoothService {

    List<String> getPairedDevices();
}

在构造函数中（我用胶子移动）基本看法是这样的：

public class BasicView extends View {

    private BluetoothService bluetoothService;

    public BasicView(String name) {
        super(name);
        Services.registerServiceFactory(new BluetoothServiceFactory());
        System.out.println("REGISTER BLUETOOTH");
        boolean isPresent = Services.get(BluetoothService.class).isPresent();
        System.out.println("BLUETOOTH PRESENT: " + isPresent);
        if (isPresent) {
            Optional<BluetoothService> opt = Services.get(BluetoothService.class);
            bluetoothService = opt.get();
        }

......等下一个代码...

在Andoid / Java包文件夹我有包sk.ltorok.gluon.bluetooth.plugins.android并没有实现AndroidBluetoothService类

package sk.ltorok.gluon.bluetooth.plugins.android;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
import android.os.Build;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import javafxports.android.FXActivity;
import sk.ltorok.gluon.bluetooth.plugins.BluetoothService;

public class AndroidBluetoothService implements BluetoothService {
    // ...
}

但isPresent永远是假的！