堆栈内存溢出
  繁体   English   中英

State 的显示名称以及 Android 中的纬度和经度

[英]Display Name of the State along with Latitude and Longitude in Android

 原文  2019-11-20 06:05:19  0   2    java/ android/ google-maps/ geolocation

问题描述

最初，我使用以下代码在应用程序中显示当前的纬度和经度：

package com.coders.location;

import android.Manifest;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationCallback;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationResult;
import com.google.android.gms.location.LocationServices;

import java.util.Locale;

public class MainActivity extends AppCompatActivity {

    private FusedLocationProviderClient mFusedLocationClient;

    private double wayLatitude = 0.0, wayLongitude = 0.0;
    private LocationRequest locationRequest;
    private LocationCallback locationCallback;
    private android.widget.Button btnLocation;
    private TextView txtLocation;
    private android.widget.Button btnContinueLocation;
    private TextView txtContinueLocation;
    private StringBuilder stringBuilder;

    private boolean isContinue = false;
    private boolean isGPS = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        this.txtContinueLocation = (TextView) findViewById(R.id.txtContinueLocation);
        this.btnContinueLocation = (Button) findViewById(R.id.btnContinueLocation);
        this.txtLocation = (TextView) findViewById(R.id.txtLocation);
        this.btnLocation = (Button) findViewById(R.id.btnLocation);

        mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);

        locationRequest = LocationRequest.create();
        locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
        locationRequest.setInterval(10 * 1000); // 10 seconds
        locationRequest.setFastestInterval(5 * 1000); // 5 seconds

        new GpsUtils(this).turnGPSOn(new GpsUtils.onGpsListener() {
            @Override
            public void gpsStatus(boolean isGPSEnable) {
                // turn on GPS
                isGPS = isGPSEnable;
            }
        });

        locationCallback = new LocationCallback() {
            @Override
            public void onLocationResult(LocationResult locationResult) {
                if (locationResult == null) {
                    return;
                }
                *******************************************************
                for (Location location : locationResult.getLocations()) {
                    if (location != null) {
                        wayLatitude = location.getLatitude();
                        wayLongitude = location.getLongitude();
                        if (!isContinue) {
                            txtLocation.setText(String.format(Locale.US, "%s - %s", wayLatitude, wayLongitude));
                        } else {
                            stringBuilder.append(wayLatitude);
                            stringBuilder.append("-");
                            stringBuilder.append(wayLongitude);
                            stringBuilder.append("\n\n");
                            txtContinueLocation.setText(stringBuilder.toString());
                        }
                *******************************************************

                        if (!isContinue && mFusedLocationClient != null) {
                            mFusedLocationClient.removeLocationUpdates(locationCallback);
                        }
                    }
                }
            }
        };

        btnLocation.setOnClickListener(v -> {

            if (!isGPS) {
                Toast.makeText(this, "Please turn on GPS", Toast.LENGTH_SHORT).show();
                return;
            }
            isContinue = false;
            getLocation();
        });

        btnContinueLocation.setOnClickListener(v -> {
            if (!isGPS) {
                Toast.makeText(this, "Please turn on GPS", Toast.LENGTH_SHORT).show();
                return;
            }
            isContinue = true;
            stringBuilder = new StringBuilder();
            getLocation();
        });
    }

    private void getLocation() {
        if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
                && ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION},
                    AppConstants.LOCATION_REQUEST);

        } else {
            if (isContinue) {
                mFusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, null);
            } else {
                mFusedLocationClient.getLastLocation().addOnSuccessListener(MainActivity.this, location -> {
                    if (location != null) {
                        wayLatitude = location.getLatitude();
                        wayLongitude = location.getLongitude();
                        txtLocation.setText(String.format(Locale.US, "%s - %s", wayLatitude, wayLongitude));
                    } else {
                        mFusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, null);
                    }
                });
            }
        }
    }

    @SuppressLint("MissingPermission")
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        switch (requestCode) {
            case 1000: {
                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                    if (isContinue) {
                        mFusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, null);
                    } else {
                        mFusedLocationClient.getLastLocation().addOnSuccessListener(MainActivity.this, location -> {
                            if (location != null) {
                                wayLatitude = location.getLatitude();
                                wayLongitude = location.getLongitude();
                                txtLocation.setText(String.format(Locale.US, "%s - %s", wayLatitude, wayLongitude));
                            } else {
                                mFusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, null);
                            }
                        });
                    }
                } else {
                    Toast.makeText(this, "Permission denied", Toast.LENGTH_SHORT).show();
                }
                break;
            }
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == Activity.RESULT_OK) {
            if (requestCode == AppConstants.GPS_REQUEST) {
                isGPS = true; // flag maintain before get location
            }
        }
    }
}

当我这样做时，代码运行良好。 然后我尝试更新代码，因为我需要显示当前位置的 State 以及“即在用户电话当前所在的位置（例如南卡罗来纳州、马萨诸塞州、加利福尼亚州等）显示 state。

这是更新的代码：

package com.coders.location;

import android.Manifest;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationCallback;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationResult;
import com.google.android.gms.location.LocationServices;

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

public class MainActivity extends AppCompatActivity {

    private FusedLocationProviderClient mFusedLocationClient;

    private double wayLatitude = 0.0, wayLongitude = 0.0;
    private LocationRequest locationRequest;
    private LocationCallback locationCallback;
    private android.widget.Button btnLocation;
    private TextView txtLocation;
    private android.widget.Button btnContinueLocation;
    private TextView txtContinueLocation;
    private StringBuilder stringBuilder;

    private boolean isContinue = false;
    private boolean isGPS = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        this.txtContinueLocation = (TextView) findViewById(R.id.txtContinueLocation);
        this.btnContinueLocation = (Button) findViewById(R.id.btnContinueLocation);
        this.txtLocation = (TextView) findViewById(R.id.txtLocation);
        this.btnLocation = (Button) findViewById(R.id.btnLocation);

        mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);

        locationRequest = LocationRequest.create();
        locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
        locationRequest.setInterval(10 * 1000); // 10 seconds
        locationRequest.setFastestInterval(5 * 1000); // 5 seconds

        new GpsUtils(this).turnGPSOn(new GpsUtils.onGpsListener() {
            @Override
            public void gpsStatus(boolean isGPSEnable) {
                // turn on GPS
                isGPS = isGPSEnable;
            }
        });

        locationCallback = new LocationCallback() {
            @Override
            public void onLocationResult(LocationResult locationResult) {
                if (locationResult == null) {
                    return;
                }
                *******************************************************
                for (Location location : locationResult.getLocations()) {
                    if (location != null) {
                        wayLatitude = location.getLatitude();
                        wayLongitude = location.getLongitude();

                        double latitude = location.getLatitude();
                        double longitude = location.getLongitude();
                        Geocoder gc = new Geocoder(getApplicationContext(), Locale.getDefault());
                        try {
                            List<Address> addresses = gc.getFromLocation(latitude, longitude, 1);

                            if (addresses.size() > 0) {
                                Address address = addresses.get(0);
                                for (int i = 0; i < address.getMaxAddressLineIndex(); i++)
                                    stringBuilder.append(address.getAddressLine(i)).append("\n");
                                stringBuilder.append(address.getLocality()).append("\n");
                                stringBuilder.append(address.getPostalCode()).append("\n");
                                stringBuilder.append(address.getCountryName());
                            }
                        } catch (IOException e){

                        }


                        if (!isContinue) {
                            txtLocation.setText(stringBuilder.toString());
                        } else {
                            stringBuilder.append(wayLatitude);
                            stringBuilder.append("-");
                            stringBuilder.append(wayLongitude);
                            stringBuilder.append("\n\n");
                            txtContinueLocation.setText(stringBuilder.toString());
                        }
                *******************************************************
                        if (!isContinue && mFusedLocationClient != null) {
                            mFusedLocationClient.removeLocationUpdates(locationCallback);
                        }
                    }
                }
            }
        };

        btnLocation.setOnClickListener(v -> {

            if (!isGPS) {
                Toast.makeText(this, "Please turn on GPS", Toast.LENGTH_SHORT).show();
                return;
            }
            isContinue = false;
            getLocation();
        });

        btnContinueLocation.setOnClickListener(v -> {
            if (!isGPS) {
                Toast.makeText(this, "Please turn on GPS", Toast.LENGTH_SHORT).show();
                return;
            }
            isContinue = true;
            stringBuilder = new StringBuilder();
            getLocation();
        });
    }

    private void getLocation() {
        if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
                && ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION},
                    AppConstants.LOCATION_REQUEST);

        } else {
            if (isContinue) {
                mFusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, null);
            } else {
                mFusedLocationClient.getLastLocation().addOnSuccessListener(MainActivity.this, location -> {
                    if (location != null) {
                        wayLatitude = location.getLatitude();
                        wayLongitude = location.getLongitude();
                        txtLocation.setText(String.format(Locale.US, "%s - %s", wayLatitude, wayLongitude));
                    } else {
                        mFusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, null);
                    }
                });
            }
        }
    }

    @SuppressLint("MissingPermission")
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        switch (requestCode) {
            case 1000: {
                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                    if (isContinue) {
                        mFusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, null);
                    } else {
                        mFusedLocationClient.getLastLocation().addOnSuccessListener(MainActivity.this, location -> {
                            if (location != null) {
                                wayLatitude = location.getLatitude();
                                wayLongitude = location.getLongitude();
                                txtLocation.setText(String.format(Locale.US, "%s - %s", wayLatitude, wayLongitude));
                            } else {
                                mFusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, null);
                            }
                        });
                    }
                } else {
                    Toast.makeText(this, "Permission denied", Toast.LENGTH_SHORT).show();
                }
                break;
            }
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == Activity.RESULT_OK) {
            if (requestCode == AppConstants.GPS_REQUEST) {
                isGPS = true; // flag maintain before get location
            }
        }
    }
}

这段代码现在甚至不显示当前的纬度和经度。 有人可以帮我弄这个吗。 我正在寻找显示 State 以及当前位置的纬度和经度。

已实施更改并且似乎与我的问题最相关的代码行在代码的开头和结尾处用一长串星号标记，如下所示：********** ************************************************

2 个解决方案

解决方案1
 1 已采纳  2019-11-20 07:08:42

我们需要做的就是在清单文件中添加这个权限：

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

并像这样创建一个 LocationManager 实例：

LocationManager locationManager = (LocationManager)
getSystemService(Context.LOCATION_SERVICE);
Check if GPS is enabled or not.

然后实现 LocationListener 并获取坐标：

LocationListener locationListener = new MyLocationListener();
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, 5000, 10, locationListener);
Here is the sample code to do so

私人 class MyLocationListener 实现 LocationListener {

    @Override
    public void onLocationChanged(Location loc) {
        editLocation.setText("");
        pb.setVisibility(View.INVISIBLE);
        Toast.makeText(
                getBaseContext(),
                "Location changed: Lat: " + loc.getLatitude() + " Lng: "
                    + loc.getLongitude(), Toast.LENGTH_SHORT).show();
        String longitude = "Longitude: " + loc.getLongitude();
        Log.v(TAG, longitude);
        String latitude = "Latitude: " + loc.getLatitude();
        Log.v(TAG, latitude);

        /*------- To get city name from coordinates -------- */
        String cityName = null;
        Geocoder gcd = new Geocoder(getBaseContext(), Locale.getDefault());
        List<Address> addresses;
        try {
            addresses = gcd.getFromLocation(loc.getLatitude(),
                    loc.getLongitude(), 1);
            if (addresses.size() > 0) {
                System.out.println(addresses.get(0).getLocality());
                cityName = addresses.get(0).getLocality();
            }
        }
        catch (IOException e) {
            e.printStackTrace();
        }
        String s = longitude + "\n" + latitude + "\n\nMy Current City is: "
            + cityName;
        editLocation.setText(s);
    }

    @Override
    public void onProviderDisabled(String provider) {}

    @Override
    public void onProviderEnabled(String provider) {}

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

请参阅此流程： 如何在 Android 中以编程方式获取当前 GPS 位置？

解决方案2
 0  2019-11-20 06:58:22

实际上这段代码现在不起作用。 Google 已弃用上述代码，现在您需要使用以下代码。

我用的是 Retrofit Retrofit 客户端

public static final String GOOGLE_ETA = "https://maps.googleapis.com/maps/";

public static Retrofit getEtaClient() {
    if (retrofitEtaGoogle == null) {
        retrofitEtaGoogle = new Retrofit.Builder()
                .baseUrl(GOOGLE_ETA)
                .client(provideOkHttpClient())
                .addConverterFactory(GsonConverterFactory.create())
                .build();
    }
    return retrofitEtaGoogle;
}

Api接口class

@GET("api/geocode/json?key="+ Consts.GOOGLE_API_KEY)
Call<GoogleGeoCodeApiResponseModel> getPlaceFromLatLng(@Query("latlng") String latLng);

在 updateLocationUI() 方法中

String latLng = location.getLatitude() + "," + location.getLongitude();
    ApiInterface apiInterface = RetrofitClient.getEtaClient().create(ApiInterface.class);
    Call<GoogleGeoCodeApiResponseModel> call = apiInterface.getPlaceFromLatLng(latLng);
    call.enqueue(new Callback<GoogleGeoCodeApiResponseModel>() {
        @Override
        public void onResponse(Call<GoogleGeoCodeApiResponseModel> call, Response<GoogleGeoCodeApiResponseModel> response) {

            if (response.body().getStatus() != null && response.body().getStatus().equals("OK")) {
                addressObj = new GoogleAddressLocalModel();
                addressObj.setName(response.body().getResults().get(0).getFormattedAddress());
                addressObj.setLat(response.body().getResults().get(0).getGeometry().getLocation().getLat());
                addressObj.setLng(response.body().getResults().get(0).getGeometry().getLocation().getLng());
                for (GoogleGeoCodeApiResponseModel.AddressComponent obj : response.body().getResults().get(0).getAddressComponents()) {
                    for (String type : obj.getTypes()) {
                        if (type.contains("postal_code")) {
                            addressObj.setPostalCode(obj.getLongName());
                        } else if (type.contains("country")) {
                            addressObj.setCountryId(obj.getShortName());
                            addressObj.setCountryName(obj.getLongName());
                        } else if (type.contains("administrative_area_level_2")) {
                            addressObj.setCityName(obj.getLongName());
                        }
                    }
                }


            } else if (response.body().getStatus() != null) {
                Log.e("ErrroGettingAddress", response.body().getStatus());

            }
        }

        @Override
        public void onFailure(Call<GoogleGeoCodeApiResponseModel> call, Throwable t) {
            Log.e("ErrroGettingAddress", t.getLocalizedMessage());

        }
    });
}

暂无
暂无

声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.

相关问题 android经纬度返回0.0 如何获得Android的纬度和经度？ Android Phonegap中的纬度经度跟踪？ 如何在Android中获取经度和纬度 在Android中获取确切的经度和纬度 获取当前的经纬度android Gps android - 获取纬度和经度 获取经度和纬度值以发布到url-Android 如何通过经度和纬度获取android中的城市信息 如何在Android中获取经度和纬度？
相关标签
 
粤ICP备18138465号  © 2020-2024 STACKOOM.COM