Android Open Source - rearview-camera Vehicle Monitoring Service

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License

The source code is released under:

Copyright (c) 2012 Ford Motor Company All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are me...

Java Source Code

package com.ford.openxc.rearview;
/*w w  w  .ja v a  2 s .  co  m*/
import android.app.Service;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Handler;
import android.os.IBinder;
import android.util.Log;

import com.openxc.VehicleManager;
import com.openxc.measurements.Measurement;
import com.openxc.measurements.TransmissionGearPosition;
import com.openxc.measurements.UnrecognizedMeasurementTypeException;
import com.openxc.remote.VehicleServiceException;

/** Listens for changes in gear position from the vehicle.
 *
 * This services binds with OpenXC's VehicleManager and takes care of monitoring
 * the state of the vehicle for the RearviewCamera application.
 *
 * The service also monitors the RearviewCameraActivity itself, to avoid
 * re-launching if it's already open. When the vehicle shifts out of reverse,
 * the service makes sure the video activity is stopped.
 */
public class VehicleMonitoringService extends Service {
    private final static String TAG = "VehicleMonitoringService";
    public static final String ACTION_VEHICLE_UNREVERSED =
            "com.ford.openxc.VEHICLE_UNREVERSED";

    private final Handler mHandler = new Handler();
    private VehicleManager mVehicleManager;

    TransmissionGearPosition.Listener mTransmissionListener =
        new TransmissionGearPosition.Listener() {
            public void receive(Measurement measurement) {
                final TransmissionGearPosition status =
                        (TransmissionGearPosition) measurement;

                mHandler.post(new Runnable() {
                    public void run() {
                        if(status.getValue().enumValue() ==
                                TransmissionGearPosition.GearPosition.REVERSE &&
                                !RearviewCameraActivity.isRunning()){
                            startRearviewCameraActivity();
                        } else if(status.getValue().enumValue() !=
                                TransmissionGearPosition.GearPosition.REVERSE &&
                                RearviewCameraActivity.isRunning()) {
                            sendVehicleUnreversedBroadcast();
                        }
                    }

                    private void startRearviewCameraActivity() {
                        Intent intent = new Intent(
                                VehicleMonitoringService.this,
                                RearviewCameraActivity.class);
                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                        VehicleMonitoringService.this.startActivity(intent);
                    }

                    private void sendVehicleUnreversedBroadcast() {
                        Intent unreversedIntent = new Intent(
                                ACTION_VEHICLE_UNREVERSED);
                        sendBroadcast(unreversedIntent);
                    }
                });
            }
        };

    ServiceConnection mConnection = new ServiceConnection() {
        public void onServiceConnected(ComponentName className,
                IBinder service) {
            Log.i(TAG, "Bound to VehicleManager");
            mVehicleManager = ((VehicleManager.VehicleBinder)service
                    ).getService();

            try {
                mVehicleManager.addListener(TransmissionGearPosition.class,
                        mTransmissionListener);
            } catch(VehicleServiceException e) {
                Log.w(TAG, "Couldn't add listeners for measurements", e);
            } catch(UnrecognizedMeasurementTypeException e) {
                Log.w(TAG, "Couldn't add listeners for measurements", e);
            }
        }

        public void onServiceDisconnected(ComponentName className) {
            Log.w(TAG, "VehicleService disconnected unexpectedly");
            mVehicleManager = null;
        }
    };

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        bindService(new Intent(this, VehicleManager.class), mConnection,
                Context.BIND_AUTO_CREATE);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        unbindService(mConnection);
    }
}

Java Source Code List

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