7

我想使用最新的融合位置提供程序客户端获取“后台服务”的位置更新。我不想使用所有正在使用的位置侦听器和 Google API 客户端。我还需要使用谷歌播放服务提供的位置设置 Api 来检查位置设置是否在该“后台服务”上被禁用或启用。请帮助。

4

5 回答 5

4

如果我们需要使用 fusion location api，那么我们需要使用 Google API 客户端，对于后台服务，使用它不是问题，以下是我用于在后台获取位置更新的示例，但还有一件事是 Google从 6.0 开始引入“打瞌睡”模式，因此当您的设备处于“打瞌睡”模式时，我无法保证提供更新，

import android.Manifest;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.util.Log;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GoogleApiAvailability;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;

/**
 * Created By Dhaval Solanki
 */

public class ConnectionService extends Service implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {
    String TAG = "ConnectionService";


    private GoogleApiClient mGoogleApiClient;
    private LocationRequest mLocationRequest;
    private Location previousLocation;
    public static final long UPDATE_INTERVAL_IN_MILLISECONDS = 30000;
    public static final long FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS =
            UPDATE_INTERVAL_IN_MILLISECONDS / 2;


    private Location mLastLocation;
    private Context context;

    @Override
    public IBinder onBind(Intent intent) {
        Log.i(TAG, "onBind");
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        context = getApplicationContext();
        Log.i(TAG, "onStartCommand");
        if (checkPermsion(context)) {
            setupLocationService(context);
        }
        return Service.START_STICKY;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        ApplicationCLass.isServiceRunning = true;
    }

    @Override
    public boolean onUnbind(Intent intent) {
        Log.i(TAG, "onUnbind");
        ApplicationCLass.isServiceRunning = false;
        return super.onUnbind(intent);
    }

    @Override
    public void onDestroy() {
        ApplicationCLass.isServiceRunning = false;
        super.onDestroy();
    }

    private void setupLocationService(Context context) {
        if (checkPlayServices()) {
            mGoogleApiClient = new GoogleApiClient.Builder(context)
                    .addApi(LocationServices.API)
                    .addConnectionCallbacks(this)
                    .addOnConnectionFailedListener(this)
                    .build();
            createLocationRequest();
        }
    }

    protected void createLocationRequest() {
        mLocationRequest = new LocationRequest().create();
        mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);
        mLocationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);
        mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
        mGoogleApiClient.connect();
    }

    public boolean checkPermsion(Context context) {
        int MyVersion = Build.VERSION.SDK_INT;
        if (MyVersion > Build.VERSION_CODES.LOLLIPOP_MR1) {
            if (ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                return false;
            } else if (ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                return false;
            } else {
                return true;
            }
        } else {
            return true;
        }
    }

    private boolean checkPlayServices() {
        GoogleApiAvailability googleAPI = GoogleApiAvailability.getInstance();
        int result = googleAPI.isGooglePlayServicesAvailable(this);
        if (result != ConnectionResult.SUCCESS) {
            return false;
        }
        return true;
    }


    private void startLocationUpdates() {
        if (mGoogleApiClient.isConnected()) {
            if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                return;
            }
            if (Prefs.getUserLat(context).trim().length() > 0 && Prefs.getUserLong(context).trim().length() > 0) {
            } else {
                mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
                        mGoogleApiClient);
                if (mLastLocation != null) {
                    Prefs.setUserLat(context, String.valueOf(mLastLocation.getLatitude()));
                    Prefs.setUserLong(context, String.valueOf(mLastLocation.getLongitude()));
                }
            }
            LocationServices.FusedLocationApi.requestLocationUpdates(
                    mGoogleApiClient, mLocationRequest, this);
        }
    }

    @Override
    public void onConnected(@Nullable Bundle bundle) {
        Log.i(TAG, "Connected to onConnected");
        startLocationUpdates();
    }

    @Override
    public void onConnectionSuspended(int i) {
        Log.i(TAG, "Connected to onConnectionSuspended");
    }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
        Log.i(TAG, "Connected to onConnectionFailed");
    }

    @Override
    public void onLocationChanged(Location location) {
        try {
            Logger.print("onLocationChanged", "latitued :" + location.getLatitude() + " ,, Longitude " + location.getLongitude());
        } catch (Exception e) {
            e.printStackTrace();
        }

    }


}

另一个警报服务是否继续运行

import android.app.ActivityManager;
import android.app.IntentService;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class AlarmService extends IntentService {
    @Override
    protected void onHandleIntent(Intent intent) {
        boolean isServiceRunning = false;
        ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
        for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
            if (ConnectionService.class.getName().equals(service.service.getClassName())) {
                isServiceRunning = true;
                break;
            }
        }
        Log.i("AlarmService", "Service is running " + isServiceRunning);
        if(!isServiceRunning) {
            startService(new Intent(getApplicationContext(),ConnectionService.class));
        } else {
            ConnectionService.checkConnectionAndConnect(getApplicationContext());
        }
    }

    /**
     * Creates an IntentService.  Invoked by your subclass's constructor.
     */
    public AlarmService() {
        super("AlaramService");
    }
}

最后启动服务

private void checkAndStartService() {
        final ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
        new AsyncTask<Void, Void, Boolean>() {
            boolean isServiceRunning = false;

            @Override
            protected Boolean doInBackground(Void... params) {
                for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
                    if (ConnectionService.class.getName().equals(service.service.getClassName())) {
                        isServiceRunning = true;
                        break;
                    }
                }
                return isServiceRunning;
            }

            @Override
            protected void onPostExecute(Boolean aBoolean) {
                super.onPostExecute(aBoolean);
                Log.i("onPostExecute", "Service running = " + aBoolean);
                if (!aBoolean) {
                    startService(new Intent(ActivitySplash.this, ConnectionService.class));
                    Intent i = new Intent(ActivitySplash.this, AlarmService.class);
                    PendingIntent pi = PendingIntent.getService(ActivitySplash.this, 0, i, 0);
                    AlarmManager am = (AlarmManager) ActivitySplash.this.getSystemService(Context.ALARM_SERVICE);
                    am.cancel(pi); // cancel any existing alarms
                    am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 60000, pi);
                }
            }
        }.execute();
    }
于 2017-09-09T04:27:39.867 回答
1

您可以为 intentService 编写代码，如下所示。考虑到由于它在后台运行，我们不会显示权限对话框。

public class GetLocationService extends IntentService
    implements
    GoogleApiClient.ConnectionCallbacks,
    GoogleApiClient.OnConnectionFailedListener, LocationListener {
public static String TAG = GetLocationService.class.getSimpleName();
private GoogleApiClient mGoogleApiClient;


public GetLocationService() {
    super(TAG);
}

/**
 * Creates an IntentService.  Invoked by your subclass's constructor.
 *
 * @param name Used to name the worker thread, important only for debugging.
 */
public GetLocationService(String name) {
    super(name);
}

@Override
protected void onHandleIntent(Intent intent) {
    if (mGoogleApiClient != null && mGoogleApiClient.isConnected()) {
        Log.d(TAG, "disconnecting");
        mGoogleApiClient.disconnect();
    }
    Log.d(TAG, "onHandleIntent");
    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addApi(LocationServices.API)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .build();
    mGoogleApiClient.connect();
}

@Override
public void onConnected(@Nullable Bundle bundle) {
    LocationRequest locationRequest = LocationRequest.create();
    locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

    LocationRequest locationRequestLow = LocationRequest.create();
    locationRequestLow.setPriority(LocationRequest.PRIORITY_LOW_POWER);
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) ==
            PackageManager.PERMISSION_GRANTED) {
        // TODO: Consider calling
        //    ActivityCompat#requestPermissions
        // here to request the missing permissions, and then overriding
        //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
        //                                          int[] grantResults)
        // to handle the case where the user grants the permission. See the documentation
        // for ActivityCompat#requestPermissions for more details.
        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, locationRequest, this);
    } else {
        Log.d(TAG, "permission denied");
    }
}

@Override
public void onConnectionSuspended(int i) {

}

@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

}

@Override
public void onLocationChanged(Location location) {
    Log.d(TAG, location.toString());    
}

}

于 2017-09-08T08:18:56.133 回答
1

You can extend the service class like 

public class BackgroundLocationService extends Service implements
GooglePlayServicesClient.ConnectionCallbacks,
GooglePlayServicesClient.OnConnectionFailedListener,
LocationListener

You can check the full source code here BackgroundLocationService.java

For enable location settings 

   private void displayLocationSettingsRequest() {
    GoogleApiClient googleApiClient = new GoogleApiClient.Builder(context)
            .addApi(LocationServices.API).build();
    googleApiClient.connect();

    LocationRequest locationRequest = LocationRequest.create();
    locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    locationRequest.setInterval(10000);
    locationRequest.setFastestInterval(10000 / 2);

    LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder().addLocationRequest(locationRequest);
    builder.setAlwaysShow(true);

    PendingResult<LocationSettingsResult> result = LocationServices.SettingsApi.checkLocationSettings(googleApiClient, builder.build());
    result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
        @Override
        public void onResult(@NonNull LocationSettingsResult result) {
            final Status status = result.getStatus();
            switch (status.getStatusCode()) {
                case LocationSettingsStatusCodes.SUCCESS:
                    break;
                case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:

                    try {
                        // Show the dialog by calling startResolutionForResult(), and check the result
                        // in onActivityResult().
                        status.startResolutionForResult(context, REQUEST_CHECK_SETTINGS);
                    } catch (IntentSender.SendIntentException ignored) {
                    }
                    break;
                case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
                    break;
            }
        }
    });
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    switch (requestCode) {
   // Check for the integer request code originally supplied to 
    startResolutionForResult().
        case REQUEST_CHECK_SETTINGS:
            switch (resultCode) {
                case Activity.RESULT_OK:
                    //startLocationUpdates();
                    break;
                case Activity.RESULT_CANCELED:
                    displayLocationSettingsRequest();//keep asking
                    showToast("Location permission needed");
                    break;
            }
            break;
    }
}

You can check location settings from Service and if location is off , 

LocationManager lm = (LocationManager)context.getSystemService(Context.LOCATION_SERVICE);
  boolean gps_enabled = false;
      boolean network_enabled = false;

   try {
gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
 } catch(Exception ex) {}

   try {
network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
  } catch(Exception ex) {}

   if(!gps_enabled && !network_enabled) {
// notify user
 // Either you can display a Notification(Recommended way) or you can show dialog with 

dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
//It needs SYSTEM_ALERT_WINDOW permission. Add this permission in Manifest.

   <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>     

 }
于 2017-09-08T05:30:16.177 回答
1

嗨，我对位置服务以及我们如何以完美的方式使用它有很好的了解。看到我会给你关于融合 api 的想法。

只需确保按照以下步骤操作即可。这是非常好的和简单的。 步骤 1. 制作此类 GoogleLocationService.java

public class GoogleLocationService {
private GoogleServicesCallbacks callbacks = new GoogleServicesCallbacks();
LocationUpdateListener locationUpdateListener;
Context activity;
protected GoogleApiClient mGoogleApiClient;
protected LocationRequest mLocationRequest;

public static final long UPDATE_INTERVAL_IN_MILLISECONDS = 30000;


public GoogleLocationService(Context activity, LocationUpdateListener locationUpdateListener) {
    this.locationUpdateListener = locationUpdateListener;
    this.activity = activity;
    buildGoogleApiClient();
}

protected synchronized void buildGoogleApiClient() {
    //Log.i(TAG, "Building GoogleApiClient");
    mGoogleApiClient = new GoogleApiClient.Builder(activity)
            .addConnectionCallbacks(callbacks)
            .addOnConnectionFailedListener(callbacks)
            .addApi(LocationServices.API)
            .build();
    createLocationRequest();
    mGoogleApiClient.connect();
}

protected void createLocationRequest() {
    mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

}

private class GoogleServicesCallbacks implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {

    @Override
    public void onConnected(Bundle bundle) {
        startLocationUpdates();
    }

    @Override
    public void onConnectionSuspended(int i) {
        mGoogleApiClient.connect();
    }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

        if (connectionResult.getErrorCode() == ConnectionResult.SERVICE_VERSION_UPDATE_REQUIRED) {
            Toast.makeText(activity, "Google play service not updated", Toast.LENGTH_LONG).show();

        }
        locationUpdateListener.cannotReceiveLocationUpdates();
    }

    @Override
    public void onLocationChanged(Location location) {
        if (location.hasAccuracy()) {
            if (location.getAccuracy() < 30) {
                locationUpdateListener.updateLocation(location);
            }
        }
    }
}

private static boolean locationEnabled(Context context) {
    boolean gps_enabled = false;
    LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
    try {
        gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return gps_enabled;
}

private boolean servicesConnected(Context context) {
    return isPackageInstalled(GooglePlayServicesUtil.GOOGLE_PLAY_STORE_PACKAGE, context);
}

private boolean isPackageInstalled(String packagename, Context context) {
    PackageManager pm = context.getPackageManager();
    try {
        pm.getPackageInfo(packagename, PackageManager.GET_ACTIVITIES);
        return true;
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
        return false;
    }
}


public void startUpdates() {
    /*
     * Connect the client. Don't re-start any requests here; instead, wait
     * for onResume()
     */
    if (servicesConnected(activity)) {
        if (locationEnabled(activity)) {
            locationUpdateListener.canReceiveLocationUpdates();
            startLocationUpdates();
        } else {
            locationUpdateListener.cannotReceiveLocationUpdates();
            Toast.makeText(activity, "Unable to get your location.Please turn on your device Gps", Toast.LENGTH_LONG).show();
        }
    } else {
        locationUpdateListener.cannotReceiveLocationUpdates();
        Toast.makeText(activity, "Google play service not available", Toast.LENGTH_LONG).show();
    }
}

//stop location updates
public void stopUpdates() {
    stopLocationUpdates();
}

//start location updates
private void startLocationUpdates() {

    if (checkSelfPermission(activity, ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && checkSelfPermission(activity, ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        return;
    }
    if (mGoogleApiClient.isConnected()) {
        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, callbacks);
    }
}

public void stopLocationUpdates() {
    if (mGoogleApiClient.isConnected()) {
        LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, callbacks);
    }
}

public void startGoogleApi() {
    mGoogleApiClient.connect();
}

public void closeGoogleApi() {
    mGoogleApiClient.disconnect();
}

 }

第2步。制作这个接口 LocationUpdateListener.java

 public interface LocationUpdateListener {

/**
 * Called immediately the service starts if the service can obtain location
 */
void canReceiveLocationUpdates();

/**
 * Called immediately the service tries to start if it cannot obtain location - eg the user has disabled wireless and
 */
void cannotReceiveLocationUpdates();

/**
 * Called whenever the location has changed (at least non-trivially)
 * @param location
 */
void updateLocation(Location location);

/**
 * Called when GoogleLocationServices detects that the device has moved to a new location.
 * @param localityName The name of the locality (somewhere below street but above area).
 */
void updateLocationName(String localityName, Location location);
}

步骤 3. 制作这个位置服务类 LocationService.java

public class LocationService extends Service {

private GoogleLocationService googleLocationService;

@Override
public void onCreate() {
    super.onCreate();
    //start the handler for getting locations
    //create component

    updateLocation(getApplicationContext());
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    return Service.START_STICKY;
}

//get current location os user
private void updateLocation(Context context) {
    googleLocationService = new GoogleLocationService(context, new LocationUpdateListener() {
        @Override
        public void canReceiveLocationUpdates() {
        }

        @Override
        public void cannotReceiveLocationUpdates() {
        }

        //update location to our servers for tracking purpose
        @Override
        public void updateLocation(Location location) {
            if (location != null ) {
                Timber.e("updated location %1$s %2$s", location.getLatitude(), location.getLongitude());

            }
        }

        @Override
        public void updateLocationName(String localityName, Location location) {

            googleLocationService.stopLocationUpdates();
        }
    });
    googleLocationService.startUpdates();
}


IBinder mBinder = new LocalBinder();


public class LocalBinder extends Binder {
    public LocationService getServerInstance() {
        return LocationService.this;
    }
}

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

//stop location updates on stopping the service
@Override
public void onDestroy() {
    super.onDestroy();
    if (googleLocationService != null) {
        googleLocationService.stopLocationUpdates();
    }
}
}

编辑答案：

如何使用服务，

在您的主要活动中启动服务，像这样

startService(new Intent(context, LocationService.class));

为了停止，

stopService(new Intent(context, LocationService.class));

并像这样在清单中声明，

<service
 android:name=".service.location.LocationService"
 android:enabled="true"></service>

注意：我这样做是因为我在杀死应用程序后需要位置。如果您不需要服务。那么，您可以在需要更新位置的类中直接调用下面的代码并删除位置服务。

 private GoogleLocationService googleLocationService;

 googleLocationService = new GoogleLocationService(context, new LocationUpdateListener() {
    @Override
    public void canReceiveLocationUpdates() {
    }

    @Override
    public void cannotReceiveLocationUpdates() {
    }

    //update location to our servers for tracking purpose
    @Override
    public void updateLocation(Location location) {
        if (location != null ) {
            Timber.e("updated location %1$s %2$s", location.getLatitude(), location.getLongitude());

        }
    }

    @Override
    public void updateLocationName(String localityName, Location location) {

        googleLocationService.stopLocationUpdates();
    }
});
googleLocationService.startUpdates();


and call this onDestroy 
if (googleLocationService != null) {
    googleLocationService.stopLocationUpdates();
}

请记住 Locationservice 也应该在清单中声明。在我看来，这是最好的解决方案。谢谢希望这会对你有所帮助

于 2017-09-09T18:11:03.470 回答
0

这个问题似乎不是很具体。您似乎在开始使用定位服务时遇到了问题。

最好的办法可能是查看 Google 示例 ( https://github.com/googlesamples/android-play-location ) 以更好地了解机制。我可能会从实现最简单的示例（LocationUpdates）开始。它使用 FusedLocationProvider 并检查设置是否已启用，因此它应该满足您的需求，或者至少可以帮助您入门。

如果您确实需要使用服务，可以查看LocationUpdatesForegroundService或LocationUpdatesPendingIntent。但我强烈建议您在执行此操作之前阅读并理解第一个示例。

于 2017-11-20T13:32:59.353 回答