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我正在尝试编写一个间隔运行的服务。并且每次运行时，它都应该检索手机的当前位置。就看起来我的间隔运行正常。但是一旦我按下开始按钮，我就不能再使用停止按钮来停止它了。我已经尝试过使用一个线程，但是那个总是给我错误。我也尝试过使用while循环，但不知何故我的应用程序崩溃了。无论如何，这是我现在的代码：

public class Location extends Service {

LocationManager locMan;
LocationListener myLocListener;
int intervalTime = 1000 * 30;
int minTime = 0;
float minDistance = 0;

@Override
public IBinder onBind(Intent intent) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public void onCreate() {
    // TODO Auto-generated method stub
    final Handler handler = new Handler();
    final Runnable runnable = new Runnable() {

        @Override
        public void run() {
            // TODO Auto-generated method stub

            locMan = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

            //check if GPS is on
            if (!locMan.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
                Toast.makeText(
                        getApplicationContext(),
                        "Failed to start Location service! Please turn you GPS on!",
                        Toast.LENGTH_LONG).show();
                stopSelf();
            } else if (locMan.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
                Toast.makeText(getApplicationContext(),
                        "Service Started",
                        Toast.LENGTH_SHORT).show();
                getLocation();
            }
        }

        private void getLocation() {
            // TODO Auto-generated method stub
            try {

                locMan = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

                //while GPS remains on, run this script.
                while (locMan.isProviderEnabled(LocationManager.GPS_PROVIDER)) {

                    myLocListener = new LocationListener() {

                        @Override
                        public void onStatusChanged(String provider,
                                int status, Bundle extras) {
                            // TODO Auto-generated method stub

                        }

                        @Override
                        public void onProviderEnabled(String provider) {
                            // TODO Auto-generated method stub

                        }

                        @Override
                        public void onProviderDisabled(String provider) {
                            // TODO Auto-generated method stub

                        }

                        @Override
                        public void onLocationChanged(
                                android.location.Location location) {
                            // TODO Auto-generated method stub
                            String loc = "Latitude is: "
                                    + location.getLatitude()
                                    + "Longitude is: "
                                    + location.getLongitude();

                            Toast.makeText(getApplicationContext(),
                                    loc,
                                    Toast.LENGTH_SHORT).show();
                        }
                    };

                    // Specify criteria for a gps provider and get the provider
                    Criteria criteria = new Criteria();
                    criteria.setPowerRequirement(Criteria.POWER_LOW);
                    criteria.setAccuracy(Criteria.ACCURACY_FINE);
                    criteria.setAltitudeRequired(false);
                    criteria.setBearingRequired(false);
                    criteria.setCostAllowed(true);
                    criteria.setSpeedRequired(false);

                    String BestProvider = locMan.getBestProvider(criteria,
                            false);

                    locMan.requestLocationUpdates(BestProvider,
                            minTime,
                            minDistance,
                            myLocListener);

                    Toast.makeText(getApplicationContext(),
                            "Location Retrieved",
                            Toast.LENGTH_SHORT).show();

                    handler.postDelayed(this, intervalTime);
                }
                stopSelf();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    };
    handler.postDelayed(runnable, intervalTime);
}

@Override
public void onDestroy() {
    // TODO Auto-generated method stub
    if (myLocListener != null) {
        locMan.removeUpdates(myLocListener);
    }

    Toast.makeText(getApplicationContext(),
            "Service stopped",
            Toast.LENGTH_LONG).show();
    super.onDestroy();
}

}

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2 回答 2

0

您在 Runnable 中运行 getLocation()，我猜您需要在您的可运行对象中添加一个新的处理程序，并在 onDestroy 中向该处理程序发送消息以停止位置侦听。

在 HandleMessage 内的可运行文件中，您可以停止侦听位置。

使用cwac-locpoll库怎么样？它完全符合您的要求。

于 2013-04-04T13:27:19.293 回答
0

为什么不让服务运行，并告诉 LocationManager 只在intervalTimes 通知你。换句话说，删除stopSelf()并设置minTime为1000 * 30.

于 2013-04-08T12:13:44.577 回答