android - ConvenienceRobot 是抽象的，不能实例化？

Question

这是我的代码，我该怎么办？

我已经声明了

import com.orbotix.ConvenienceRobot;

在上面

我的代码有什么问题，我已经完全遵循 SDK 示例

 import android.Manifest;
import android.app.Activity;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import com.orbotix.ConvenienceRobot;
import com.orbotix.DualStackDiscoveryAgent;
import com.orbotix.common.DiscoveryException;
import com.orbotix.common.Robot;
import com.orbotix.common.RobotChangedStateListener;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends Activity implements View.OnClickListener, RobotChangedStateListener {

    private static final int REQUEST_CODE_LOCATION_PERMISSION = 42;
    private static final float ROBOT_VELOCITY = 0.6f;

    private ConvenienceRobot mRobot;

    private Button front;
    private Button back;

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

        /*
            Associate a listener for robot state changes with the DualStackDiscoveryAgent.
            DualStackDiscoveryAgent checks for both Bluetooth Classic and Bluetooth LE.
            DiscoveryAgentClassic checks only for Bluetooth Classic robots.
            DiscoveryAgentLE checks only for Bluetooth LE robots.
       */
    }
    @Override
    public void handleRobotChangedState(Robot robot, RobotChangedStateNotificationType type) {
        switch (type) {
            case Online: {
                //Save the robot as a ConvenienceRobot for additional utility methods
                mRobot = new ConvenienceRobot(robot);
                break;
            }
        }
    }

mRobot = new ConvenienceRobot(机器人); 总是下划线有什么问题？