退出MapView后，GPS位置始终在通知托盘中保持活动状态

时间：2017-04-29 06:15:05

标签： java android gps android-mapview

原标题：

  

“GPS设置的位置”在之后仍然有效   的 LocationServices.FusedLocationApi.removeLocationUpdates（）


编辑标题：

  

退出MapView后，GPS位置始终在通知托盘中保持活动状态

我想禁用在退出我的地图活动后立即删除“GPS设置位置”和顶部通知栏中的位置图标，但不是。

我在stackoverflow中使用某人的代码，它只使用以下变量：

GoogleMap mGoogleMap;
MapView mapView;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
Location mLastLocation;
Marker mCurrLocationMarker;
MapLocationListener mapLocationListener;

我尝试了什么： 

@Override
public void onPause() {
    super.onPause();
    //stop location updates when Activity is no longer active
    if (mGoogleApiClient != null) {
        LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, mapLocationListener);
        if(mGoogleApiClient != null){
            mGoogleApiClient = null;
        }
        if(mapView != null){
            mapView = null;
        }
        if(mGoogleMap != null){
            mGoogleMap = null;
        }
        if(mLocationRequest != null){
            mLocationRequest = null;
        }
        if(mLastLocation != null){
            mLastLocation = null;
        }
        if(mCurrLocationMarker != null){
            mCurrLocationMarker = null;
        }
        if(mapLocationListener != null){
            mapLocationListener = null;
        }
    }
    activity.finish();
}

我理解为我的引用分配null不应该是解决方案，因为位置进程在系统后台运行而不是使用我的应用程序引用。
并且是，位置监听器不是更新更长但它不会像其他应用程序那样禁用顶部的位置图标。
我想要的内容：
在退出我的地图后立即停用“GPS设置的位置”和顶部通知托盘中的位置图标活性即可。我不想让我的用户认为我正在做“位置黑客”

我发现了什么：
我发现的所有解决方案都在使用LocationManager.removeUpdate我没有它。我如何在我的活动中声明它？这真的可以解决我的问题吗？

编辑：附加代码：
使用Daniel Nugent的答案...... 

import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationManager;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapView;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;

import static android.Manifest.permission.ACCESS_FINE_LOCATION;
import static android.content.pm.PackageManager.PERMISSION_GRANTED;
import static android.location.LocationManager.GPS_PROVIDER;
import static android.location.LocationManager.NETWORK_PROVIDER;

/**
 * Created by elliotching on 11-Apr-17.
 */

public class ActivityMaps_ extends MyCustomActivity {

    GoogleMap mGoogleMap;
    MapView mapView;
    LocationRequest mLocationRequest;
    GoogleApiClient mGoogleApiClient;
    Location mLastLocation;
    Marker mCurrLocationMarker;
    MapLocationListener mapLocationListener;
    LocationManager locManager;

    Button buttonSaveLocation;

    double[] markerLocation;

    private final static int mapZoomLevel = 18;

    Context context = this;
    AppCompatActivity activity = (AppCompatActivity) context;

    private class GoogleApiClientConnection implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {

        @Override
        public void onConnected(Bundle bundle) {

            Log.d("onConnected", "onConnected.");
            mLocationRequest = new LocationRequest();
            mLocationRequest.setInterval(1000);
            mLocationRequest.setFastestInterval(50);
            mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
            if (ContextCompat.checkSelfPermission(context,
                    ACCESS_FINE_LOCATION)
                    == PERMISSION_GRANTED) {
                LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, mapLocationListener);
            }

        }

        @Override
        public void onConnectionSuspended(int i) {
        }

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

    private class MapLocationListener implements com.google.android.gms.location.LocationListener {
        @Override
        public void onLocationChanged(Location location) {
            // DO MY LOCATION UPDATE...
        }
    }

    private class OnMapReady implements OnMapReadyCallback {

        @Override
        public void onMapReady(GoogleMap googleMap) {
            Log.d("onMapReady", "onMapReady.");
            mGoogleMap = googleMap;
            mGoogleMap.setOnMapClickListener(new OnMapTouched());

            //if device OS SDK >= 23 (Marshmallow)
            if (Build.VERSION.SDK_INT >= 23) {
                //IF Location Permission already granted
                if (ContextCompat.checkSelfPermission(context, ACCESS_FINE_LOCATION) == PERMISSION_GRANTED) {

                    buildGoogleApiClient();
                    mGoogleMap.setMyLocationEnabled(true);

                } else {

                    // Request Location Permission
                    checkLocationPermission();

                }
            }

            //if device OS is version 5 Lollipop and below ( <= SDK_22 )
            else {

                if (checkLocationPermission_v22()) {

                    buildGoogleApiClient();
                    mGoogleMap.setMyLocationEnabled(true);

                } else {

                    // AlertDialog TO EXIT MAP...

                }
            }
        }
    }

    private class OnMapTouched implements GoogleMap.OnMapClickListener {

        @Override
        public void onMapClick(LatLng latLng) {
            // CHANGE MY MARKER...
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // createMyView = setContentView(...)
        createMyView(R.layout.activity_maps, R.id.toolbar);

        mapLocationListener = new MapLocationListener();

        buttonSaveLocation = (Button) findViewById(R.id.button_save_location);
        buttonSaveLocation.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                saveLocation();
            }
        });


        mapView = (MapView) findViewById(R.id.mapView);
        mapView.onCreate(savedInstanceState);

        mapView.getMapAsync(new OnMapReady());

        mapView.onResume();


    }

    private void saveLocation() {
        Intent i = new Intent();
        i.putExtra("savedlocation", markerLocation);
        setResult(RESULT_OK, i);
        this.onPause();
    }

    @Override
    public void onPause() {
        super.onPause();

        if (mGoogleApiClient != null && mapLocationListener != null) {
            Log.d("FusedLocationApi", "run!");
            LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, mapLocationListener);
        }

        activity.finish();
    }

    protected synchronized void buildGoogleApiClient() {

        Log.d("buildGoogleApiClient", "buildGoogleApiClient.");
        GoogleApiClientConnection g = new GoogleApiClientConnection();
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(g)
                .addOnConnectionFailedListener(g)
                .addApi(LocationServices.API)
                .build();
        mGoogleApiClient.connect();

    }

    private boolean checkLocationPermission_v22() {
        locManager = (LocationManager) context.getSystemService(LOCATION_SERVICE);
        if (locManager.isProviderEnabled(GPS_PROVIDER) ||
                locManager.isProviderEnabled(NETWORK_PROVIDER)) {
            return true;
        } else {
            return false;
        }
    }

    public static final int FR_PERMISSIONS_REQUEST_CODE_LOCATION = 99;

    private void checkLocationPermission() {
        if (ContextCompat.checkSelfPermission(context, ACCESS_FINE_LOCATION) != PERMISSION_GRANTED) {

            ActivityCompat.requestPermissions(activity, new String[]{ACCESS_FINE_LOCATION}, FR_PERMISSIONS_REQUEST_CODE_LOCATION);

        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {

        switch (requestCode) {
            case FR_PERMISSIONS_REQUEST_CODE_LOCATION: {

                if (grantResults.length > 0 && grantResults[0] == PERMISSION_GRANTED) {

                    if (ContextCompat.checkSelfPermission(this, ACCESS_FINE_LOCATION) == PERMISSION_GRANTED) {

                        if (mGoogleApiClient == null) {
                            buildGoogleApiClient();
                        }
                        mGoogleMap.setMyLocationEnabled(true);
                    }

                } else {

                    // AlertDialog to EXIT MAP...

                }
                return;
            }
        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (Build.VERSION.SDK_INT > 5
                && keyCode == KeyEvent.KEYCODE_BACK
                && event.getRepeatCount() == 0) {

            this.onPause();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == android.R.id.home) {
            this.onPause();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

}

2 个答案:

答案 0 :(得分：2)

使用此课程进行位置跟踪。

public class FusedLocationTracker implements LocationListener, GoogleApiClient.OnConnectionFailedListener, GoogleApiClient.ConnectionCallbacks {
    Context context;

    protected GoogleApiClient mGoogleApiClient;
    GoogleMap googleMap;
    LocationRequest mLocationRequest;
    Location mCurrentLocation = null;
    private static final long INTERVAL = 1000 * 5;
    private static final long FASTEST_INTERVAL = 1000 * 1;
    String TAG = "LocationTracker";
    boolean isGPSEnabled, wifiStatus;
    WifiManager wifiManager;
    FusedLocationDataInterface fusedLocationDataInterface;

    public FusedLocationTracker(Context context){
        this.context = context;
        wifiManager = (WifiManager)this.context.getSystemService(Context.WIFI_SERVICE);
        wifiStatus = wifiManager.isWifiEnabled();
        if (!wifiStatus){
            wifiManager.setWifiEnabled(true);
            wifiManager.startScan();
        }
        createLocationRequest();
        buildGoogleApiClient();
    }

    public void createLocationRequest() {
        mLocationRequest = new LocationRequest();
        mLocationRequest.setInterval(INTERVAL);
        mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

        Log.d(TAG, "createLocationRequest");
    }

    protected synchronized void buildGoogleApiClient() {
        Log.d(TAG, "buildGoogleApiClient");
        mGoogleApiClient = new GoogleApiClient.Builder(context)
                .addApi(LocationServices.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();

        mGoogleApiClient.connect();
    }

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

    public void startLocationUpdates() {
        Log.d(TAG, "startLocationUpdates");
        if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION)!= PackageManager.PERMISSION_GRANTED
            && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        PendingResult<Status> pendingResult = LocationServices.FusedLocationApi.requestLocationUpdates(
            mGoogleApiClient, mLocationRequest, this);
    }

    @Override
    public void onConnectionSuspended(int i) {
        Log.d(TAG, "onConnectionSuspended");
        mGoogleApiClient.connect();
    }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
        Log.d(TAG, "onConnectionSuspended");
    }

    @Override
    public void onLocationChanged(Location location) {
        Log.d(TAG, "onLocationChanged");
        if (location != null) {
            fusedLocationDataInterface = (FusedLocationDataInterface) context;
            fusedLocationDataInterface.getFusedLocationData(location);
        }
    }

    public void stopLocationUpdates() {
        Log.d(TAG, "stopLocationUpdates");
        if (mGoogleApiClient.isConnected()) {
            LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
            if (!wifiStatus){
                wifiManager.setWifiEnabled(false);
            }
        }
    }
}

创建用于编写位置的界面

public interface FusedLocationDataInterface {
    public void getFusedLocationData(Location location);
}

在onCreate()方法的主要活动中创建类FusedLocationTracker.class的对象并在活动中实现接口。

覆盖此方法

@Override
public void getFusedLocationData(Location location) {
    LatLng locate = new LatLng(location.getLatitude(), location.getLongitude());
    mMap.addMarker(new MarkerOptions().title("My Location").position(locate));
    mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(locate, 16.0f));
}

如果您想停止位置服务，请拨打stopLocationUpdates()。

答案 1 :(得分：0)

解决了。
我的错，因为没有众所周知的理解INSERT。只需在我的覆盖MapView内拨打MapView.onPause()即可解决问题。

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