鹦鹉AR.Drone 2.0 - JavaDrone (获取无人机的详细信息，如电池水平、高度、速度等)？

Question

我在研究鹦鹉AR。无人机项目。这些库在本项目中从JavaDrone网站(https://code.google.com/p/javadrone/downloads/list)下载和实现。但是，虽然我确实包含了所有正确的库，并进行了正确的类调用来获取方法，但它仍然不能返回正确的信息。所有返回的结果似乎都是“假的”。知道这段代码是怎么回事吗？请帮助我：

所以我做的是我有两个按钮：(i)连接(ii)脱扣按钮。连接按钮功能用于建立与无人机的连接，而起飞按钮用于使无人机飞行稍微移动一点，并返回无人机的NAV导航数据。遗憾的是，所有返回的NAV数据似乎都无法工作。

注意:这段代码在编译代码时运行良好。但它无法从无人机返回正确有效的NAV数据。

private void jButtonConnectActionPerformed(java.awt.event.ActionEvent evt) {    
          System.out.println("Connect?");
          drone = new ARDrone();
          data = new NavData();
          drone.playLED(10,10,10);
          drone.connect();
          drone.clearEmergencySignal();

          System.err.println("Ready to connect!!");
          // Wait until drone is ready
          drone.waitForReady(CONNECT_TIMEOUT);
          System.err.println("Drone State: " + drone.getState());
          // do TRIM operation
          drone.trim();  
          System.err.println("Congratulation! You have connected to Drone!");
          System.out.println("You can issue flight commands now!");
          batteryStatus.setText("0" + "%");
          batteryStatus.setForeground(Color.ORANGE);       
          batteryStatus.setText("" + data.getBattery());
    }

 private void jButtonTakeOffActionPerformed(java.awt.event.ActionEvent evt) {  
       System.err.println("Current Drone State : " + drone.getState().toString());           
       System.err.println("Taking off");
       drone.takeOff();
       Thread.sleep(4000);
       System.err.println("**********\nMOVE\n**********");
       drone.move(0.0f, 150.5f, 500.0f, 0.0f);
       Thread.sleep(1000);            
       System.err.println("******************************************");
       System.err.println("Drone Infomation"); 
       System.err.println("Battery Too High ? " + data.isBatteryTooHigh());
       System.err.println("Battery Too Low ? " + data.isBatteryTooLow());
       System.err.println("Drone Flying ? " + data.isFlying());
       System.err.println("Control Received ? " + data.isControlReceived());
       System.err.println("Motor Down ? " + data.isMotorsDown());
       System.err.println("Not Enough Power ?" +  data.isNotEnoughPower());
       System.err.println("Trim Received ? " + data.isTrimReceived());
       System.err.println("Trim Running? " + data.isTrimRunning());
       System.err.println("Trim succeded? " + data.isTrimSucceeded());
       System.err.println("PIC Number OK? "+ data.isPICVersionNumberOK());
       System.err.println("******************************************");
       Thread.sleep(5000);
       drone.sendAllNavigationData();
       drone.land();
}

输出:

******************************************
Drone Infomation
Battery Life: 0.0%
Battery Too High ? false
Battery Too Low ? false
Drone Flying ? false
Control Received ? false
Motor Down ? false
Not Enough Power ?false
Trim Received ? false
Trim Running? false
Trim succeded? false
PIC Number OK? false
********************************************

更新:我所做的一切都遵循了约翰的建议。我实现了从无人机获取NavData所必需的所有方法和NavData。

    import com.codeminders.ardrone.ARDrone;
    import com.codeminders.ardrone.ARDrone.VideoChannel;
    import com.codeminders.ardrone.NavData;
    import com.codeminders.ardrone.NavDataListener;

    public class arDrone extends javax.swing.JFrame implements Runnable, NavDataListener{

    public ARDrone drone;
    public NavData data = new NavData();

    public arDrone(String text) {
       //FreeTTS speech text
       this.text=text;          
     }

    public arDrone() {
      initComponents(); 
      setIcon();
      initDrone();
    }

    private void initDrone() {
       try {
         drone = new ARDrone();
         data = new NavData();
         drone.addNavDataListener(this);
       } catch (UnknownHostException ex) {                        
         System.err.println(ex);
         return; 
       }      
   }

    public void navDataReceived(NavData nd) {
        System.err.println("Testing navDataReceived is running...");
        updateBatteryStatus(nd.getBattery());
        this.flying.set(nd.isFlying());
    }

    private void updateBatteryStatus(final int value) {
        java.awt.EventQueue.invokeLater(new Runnable() {      
        @Override
        public void run() {       
            batteryStatus.setText(value + "%");
            if (value < 15) {
                batteryStatus.setForeground(Color.RED);
            } else if (value < 50) {
                batteryStatus.setForeground(Color.ORANGE);
            } else {
                batteryStatus.setForeground(Color.GREEN);
            }
          }
       });
     }

Answer 1

问题是，您并没有做任何事情来实际获取导航数据。您不能仅仅创建一个NavData对象并希望它被有效的数据填充--它不会。

您需要使用com.codeminders.ardrone.NavDataListener接口。

1. 实现 method。
2. 使用addNavDataListener添加侦听器。
3. 在navDataRecieved方法中，您将接收具有有效遥测数据的NavData对象。

Answer 2

你设置无人机IP地址了吗？据消息来源称，无人机的默认IP是192.168.1.1。

您可以调用另一个构造函数来设置IP：

drone = new ARDrone(InetAddress.getByName("xxx.xxx.xxx.xxx"));

用实际的无人机IP替换xxx.xxx。