保持应用程序在后台运行 [英] keep application running in background

问题描述

我想让我的应用程序在后台运行
我有一个应用程序将用户的位置发送到我们的服务器
我有以下代码:

I want to keep my application running in background
I have an application that sends the user's location to our server
I have the following code:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    LocationManager locationManager;
    String context = Context.LOCATION_SERVICE;
    locationManager = (LocationManager)getSystemService(context);

    Criteria criteria = new Criteria();
    criteria.setAccuracy(Criteria.ACCURACY_FINE);
    criteria.setAltitudeRequired(false);
    criteria.setBearingRequired(false);
    criteria.setCostAllowed(true);
    criteria.setPowerRequirement(Criteria.POWER_LOW);
    String provider = locationManager.getBestProvider(criteria, true);

    updateWithNewLocation(null);

    locationManager.requestLocationUpdates(provider, (10*60*1000), 10,
                                           locationListener);
}
private final LocationListener locationListener = new LocationListener() {
    public void onLocationChanged(Location location) {
      updateWithNewLocation(location);
    }

    public void onProviderDisabled(String provider){
      updateWithNewLocation(null);
    }

    public void onProviderEnabled(String provider){ }
    public void onStatusChanged(String provider, int status, 
                                Bundle extras){ }
  };
  public void updateWithNewLocation(Location location) {


        if (location != null) {
            Dbhelper helper = new Dbhelper(this);
            final SQLiteDatabase db = helper.getWritableDatabase();
            long time = System.currentTimeMillis();
            SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd kk:mm:ss");
            final String curTime = df.format(time);
            final double lat = location.getLatitude();
            final double lng = location.getLongitude();
            final double alt = location.getAltitude();
            System.out.println(lat);
            System.out.println(lng);
            System.out.println(alt);
            db.execSQL("INSERT INTO location (longitude,latitude,altitude,tgl_buat) VALUES " +
            "('"+lng+"','"+lat+"','"+alt+"','"+curTime+"')");
            db.close();
            /*Timer timer = new Timer();
            timer.scheduleAtFixedRate(new TimerTask(){
                @Override
                public void run(){
                    db.execSQL("INSERT INTO location (longitude,latitude,altitude,tgl_buat) VALUES " +
                            "('121.2149012','-6.217837','0.0','2012-05-07 10:20:01')");
                    db.close();
                }
            }, 10*60*1000, 10*60*1000);*/

          } 
       }

我希望我的应用程序在后台运行.我希望它在手机打开时自动启动

I want my applicatioin to be running in the background. I want it to launch automatically when the phone is turned on

推荐答案

解决您的问题的一个非常简单的方法是使用 服务.它将允许您在后台执行各种任务，并且是您将您的位置发送到服务器静默的最佳选择.

A very simple answer for your problem is to use Service. It will allow you to perform variety of tasks while being in background and is your best bet for sending your location to server silently.

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