当前位置未显示在我的Android应用中 [英] Current location is not showing in my android app

问题描述

我已经编写了用于获取android项目中当前位置的代码.但是，即使我坐在巴基斯坦，它也不会自动选择我的位置并在世界上某个地方显示标记.

I have written code for getting current location in android project. But it is not picking my location automatically and showing marker somewhere in the world although I'm sitting in Pakistan.

地图活动代码在此处

 package com.example.uber;

    import androidx.annotation.NonNull;
    import androidx.annotation.RequiresApi;
    import androidx.core.app.ActivityCompat;
    import androidx.core.content.ContextCompat;
    import androidx.fragment.app.FragmentActivity;

    import android.Manifest;
    import android.content.pm.PackageManager;
    import android.location.Address;
    import android.location.Geocoder;
    import android.location.Location;
    import android.location.LocationListener;
    import android.location.LocationManager;
    import android.os.Build;
    import android.os.Bundle;
    import android.util.Log;

    import com.google.android.gms.maps.CameraUpdateFactory;
    import com.google.android.gms.maps.GoogleMap;
    import com.google.android.gms.maps.OnMapReadyCallback;
    import com.google.android.gms.maps.SupportMapFragment;
    import com.google.android.gms.maps.model.LatLng;
    import com.google.android.gms.maps.model.MarkerOptions;

    import java.io.IOException;
    import java.util.List;
    import java.util.Locale;

    public class MapsActivity2 extends FragmentActivity implements OnMapReadyCallback {

        private GoogleMap mMap;
        private LocationManager locationManager;
        private LocationListener locationListener;

        @RequiresApi(api = Build.VERSION_CODES.M)
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_maps2);
            // Obtain the SupportMapFragment and get notified when the map is ready to be used.
            SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                    .findFragmentById(R.id.map);
            mapFragment.getMapAsync(this);

        }
        /**
         * Manipulates the map once available.
         * This callback is triggered when the map is ready to be used.
         * This is where we can add markers or lines, add listeners or move the camera. In this case,
         * we just add a marker near Sydney, Australia.
         * If Google Play services is not installed on the device, the user will be prompted to install
         * it inside the SupportMapFragment. This method will only be triggered once the user has
         * installed Google Play services and returned to the app.
         */
        @RequiresApi(api = Build.VERSION_CODES.M)
        @Override
        public void onMapReady(GoogleMap googleMap) {
            mMap = googleMap;

            locationManager = (LocationManager) this.getSystemService(LOCATION_SERVICE);
            locationListener = new LocationListener() {
                @Override
                public void onLocationChanged(Location location) {
                    Log.d("Location", location.toString());

                    mMap.clear();
                    // Add a marker in Sydney and move the camera
                    LatLng newLocation = new LatLng(location.getLatitude(),location.getLongitude());
                    //LatLng sydney = new LatLng(-34, 151);
                    mMap.addMarker(new MarkerOptions().position(newLocation).title("Marker in Sydney"));
                    mMap.moveCamera(CameraUpdateFactory.newLatLng(newLocation));

                    Geocoder geocoder = new Geocoder(getApplicationContext(), Locale.getDefault());
       try{
           List<Address> addressList = geocoder.getFromLocation(location.getLatitude(),location.getLongitude(),1);

           if(addressList != null && addressList.size()>0){
               Log.d("Address",addressList.get(0).toString());
           }else {
               Log.d("Address","Couldn't find Address");
           }
       }catch (IOException e){
           e.printStackTrace();
       }

                }

                @Override
                public void onStatusChanged(String provider, int status, Bundle extras) {

                }

                @Override
                public void onProviderEnabled(String provider) {

                }

                @Override
                public void onProviderDisabled(String provider) {

                }
            };
            if (Build.VERSION.SDK_INT < 23) {
                if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                    // TODO: Consider calling
                    //    Activity#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 Activity#requestPermissions for more details.
                    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);

                    //   return;
                }
                locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
            } else {

                if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                    // Ask for permission
                    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);

                } else {
                    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
                }
            }

        }
        @Override
        public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);

            if(grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
                if (ContextCompat.checkSelfPermission(this,Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED){
                    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
                }
            }
        }
    }

最大限度地减少渗透 我已获得以下许可

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>
    <uses-permission android:name="android.permission.INTERNET" />

我的实际位置是 31.175669，74.104891

My actual location is 31.175669, 74.104891

我已经在模拟器的扩展控制中手动设置了我的位置，如图所示.但我想让我的代码动态选择我的位置，请帮帮我 具有扩展控件的Android模拟器图片

I have manually set my location in extended control of emulator.as shown in figure. But I want's that my code pick my location dynamically please help me Android emulator image with extended control

推荐答案

我遇到了同样的问题.当您在AVD中测试您的应用程序时，地图将显示google corporation作为您的位置.但是，如果您的代码正确，则在设备中测试应用程序时，您将正确获得当前位置.

I have the same issue. When you test your app in AVD map will show google corporation as your place. But if your code is correct, when you test the app in your device, you will get your current location correctly.

这篇关于当前位置未显示在我的Android应用中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！