Question

此代码与我协同工作，即使应用程序未被使用也需要协调，但是当我切换手机然后再次打开手机时，它无法在后台工作，我需要它继续在后台工作。即使用户移动电话已关闭然后再次打开

    public class Check2 extends  Service
{

    @Override
    public void onTaskRemoved(Intent rootIntent) {
        super.onTaskRemoved(rootIntent);
    }

    private static final String TAG = "GPS";
        private LocationManager mLocationManager = null;
        private static final int LOCATION_INTERVAL = 1000*6;
        private static final float LOCATION_DISTANCE = 0f;

        private class LocationListener implements android.location.LocationListener{
            Location mLastLocation;

            public LocationListener(String provider)
            {

                Log.e(TAG, "LocationListener " + provider);
                mLastLocation = new Location(provider);

            }

            @Override
            public void onLocationChanged(Location location)
            {
                Log.e(TAG, "onLocationChanged: " + location);
                mLastLocation.set(location);


                double lat = mLastLocation.getLatitude();;
                double lon =  mLastLocation.getLongitude();

                Toast.makeText(getApplicationContext(), "Lat: "+lat+" Long: "+lon, Toast.LENGTH_LONG).show();

            }
            @Override
            public void onProviderDisabled(String provider)
            {
                Log.e(TAG, "onProviderDisabled: " + provider);
            }
            @Override
            public void onProviderEnabled(String provider)
            {
                Log.e(TAG, "onProviderEnabled: " + provider);
            }
            @Override
            public void onStatusChanged(String provider, int status, Bundle extras)
            {
                Log.e(TAG, "onStatusChanged: " + provider);
            }
        }
        LocationListener[] mLocationListeners = new LocationListener[] {
                new LocationListener(LocationManager.GPS_PROVIDER),
                new LocationListener(LocationManager.NETWORK_PROVIDER)
        };
        @Override
        public IBinder onBind(Intent arg0)
        {
            return null;
        }


        @Override
        public int onStartCommand(Intent intent, int flags, int startId)
        {
            LocationManager loc;
            loc=(LocationManager)getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
            LocationListener listener =new LocationListener(TAG);
            Location location ;
            Log.e(TAG, "onStartCommand");
            super.onStartCommand(intent, flags, startId);
            initializeLocationManager();
            try {

                mLocationManager.requestLocationUpdates(
                        LocationManager.NETWORK_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
                        mLocationListeners[1]);


                 //   location = listener.mLastLocation;
                location= loc.getLastKnownLocation(LocationManager.GPS_PROVIDER);
                    listener.onLocationChanged(location);

                Log.d("is work","here");
            } catch (java.lang.SecurityException ex) {
                Log.i(TAG, "fail to request location update, ignore", ex);
            } catch (IllegalArgumentException ex) {
                Log.d(TAG, "network provider does not exist, " + ex.getMessage());
            }
            try {

                mLocationManager.requestLocationUpdates(
                        LocationManager.GPS_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
                        mLocationListeners[0]);
                location= loc.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                listener.onLocationChanged(location);

                Log.d("is work", "here");
            } catch (java.lang.SecurityException ex) {
                Log.i(TAG, "fail to request location update, ignore", ex);
            } catch (IllegalArgumentException ex) {
                Log.d(TAG, "gps provider does not exist " + ex.getMessage());
            }
            return START_STICKY;
        }


    @Override
        public void onCreate()
        {
            Log.e(TAG, "onCreate");

        }
        @Override
        public void onDestroy()
        {
            Log.e(TAG, "onDestroy");
            super.onDestroy();
            if (mLocationManager != null) {
                for (int i = 0; i < mLocationListeners.length; i++) {
                    try {
                        mLocationManager.removeUpdates(mLocationListeners[i]);
                    } catch (Exception ex) {
                        Log.i(TAG, "fail to remove location listners, ignore", ex);
                    }
                }
            }
        }
    private void initializeLocationManager() {
        Log.e(TAG, "initializeLocationManager");
        if (mLocationManager == null) {
            mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);

        }
    }

Answer 1

创建广播接收器以侦听引导完成事件

查看此链接以获取教程 Broadcast receiver for Boot Action

Answer 2

1到Vivek，但您也应该从应用程序的另一个进程中启动您的服务。例如，

＆LT;＆LT;服务机器人：名称= “TweetCollectorService”
```
      android:process=":remote">
```

然后在您的服务中，您应该添加BroadcastReceiver以接收意图BOOT_COMPLETE。如果您希望此服务无论如何都继续运行，请考虑使用startService替换startForeground方法

在Android应用程序中使用Service

2 个答案: