Question

我有获取手机GPS位置的代码。但它不能正常工作。

该位置仅在我第一次按下按钮时显示（获取位置的按钮）。我改变了我的位置并再次按下但它永远不会改变......即使我重新启动应用程序!!

GPS：

package com.example.hhh;

public class GPSTracker extends Service implements LocationListener{

    private final Context context;

    boolean isGPSEnabled = false;
    boolean isNetworkEnabled = false;
    boolean canGetLocation = false;

    Location location;

    double latitude;
    double longitude;

    private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10;
    private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1;

    protected LocationManager locationManager;

    public GPSTracker(Context context) {
        this.context = context;
        getLocation();
    }

    public Location getLocation() {
        try {
            locationManager = (LocationManager) context.getSystemService(LOCATION_SERVICE);

            isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

            isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

            if(!isGPSEnabled && !isNetworkEnabled) {

            } else {
                this.canGetLocation = true;

                if (isNetworkEnabled) {

                    locationManager.requestLocationUpdates(
                            LocationManager.NETWORK_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, this);

                    if (locationManager != null) {
                        location = locationManager
                                .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

                        if (location != null) {

                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
                        }
                    }

                }

                if(isGPSEnabled) {
                    if(location == null) {
                        locationManager.requestLocationUpdates(
                                LocationManager.GPS_PROVIDER,
                                MIN_TIME_BW_UPDATES,
                                MIN_DISTANCE_CHANGE_FOR_UPDATES, this);

                        if(locationManager != null) {
                            location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

                            if(location != null) {
                                latitude = location.getLatitude();
                                longitude = location.getLongitude();
                            }
                        }
                    }
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }

        return location;
    }


    public void stopUsingGPS() {
        if(locationManager != null) {
            locationManager.removeUpdates(GPSTracker.this);
        }
    }

    public double getLatitude() {
        if(location != null) {
            latitude = location.getLatitude();
        }
        return latitude;
    }

    public double getLongitude() {
        if(location != null) {
            longitude = location.getLongitude();
        }

        return longitude;
    }

    public boolean canGetLocation() {
        return this.canGetLocation;
    }

    public void showSettingsAlert() {
        AlertDialog.Builder alertDialog = new AlertDialog.Builder(context);

        alertDialog.setTitle("GPS is settings");

        alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");

        alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                context.startActivity(intent);
            }
        });

        alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.cancel();
            }
        });

        alertDialog.show();
    }

    @Override
    public void onLocationChanged(Location arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onProviderDisabled(String arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onProviderEnabled(String arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
        // TODO Auto-generated method stub

    }

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

主要：

 package com.Gps.getlocation;

    public class MainActivity extends ActionBarActivity {

    private EditText editText11;
    private EditText editText22; 

        Button btnShowLocation;
        Button btnn;
        GPSTracker gps;


        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.lay);

            editText11 = (EditText) findViewById(R.id.editText1);
            editText22 = (EditText) findViewById(R.id.editText2);




            btnShowLocation = (Button) findViewById(R.id.show_location);
            btnn = (Button) findViewById(R.id.btn);


            btnShowLocation.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    gps = new GPSTracker(MainActivity.this);

                    if(gps.canGetLocation()) {
                        double latitude = gps.getLatitude();
                        double longitude = gps.getLongitude();


                        editText11.setText("" + latitude , TextView.BufferType.EDITABLE);
                        editText22.setText("" + longitude , TextView.BufferType.EDITABLE);




                    } else {
                        gps.showSettingsAlert();
                    }
                }
            });
           }
       }

我不想把所有代码放在这里，但我真的无法理解这个问题。
这个问题应该是我认为的愚蠢......但是我找不到那个愚蠢的问题

Answer 1

您没有更新location变量。在onLocationChanged()：

中添加此行

location = arg0;

Answer 2

您只在应用启动时调用一次getLocation（）。 getLocation（）也比必要复杂得多。您只需要获取LocationManager并调用requestLocationUpdates（）。然后在onLocationChanged（）中保存新位置。

无法获得GPS位置

2 个答案: