如何获取用户的当前城市？
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【中文标题】如何获取用户的当前城市？【英文标题】：How to get a user's current city? 【发布时间】：2017-01-03 10:56:58 【问题描述】：我想通过我的 android 应用程序获取用户的当前位置。如果从手机的 GPS 获取位置出现任何问题，我会不断看到应该显示的错误消息。你们能告诉我我的代码有什么问题吗？
MainActivity.java：
package com.example.apple.project;
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import java.io.IOException;
import java.util.List;
import java.util.Locale;
public class MainActivity extends AppCompatActivity
private static final int MY_PERMISSIONS_REQUEST_LOCATION = 1;
TextView textView;
Button button;
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = (TextView) findViewById(R.id.textView);
button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
if (ContextCompat.checkSelfPermission(MainActivity.this,
Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this,
Manifest.permission.ACCESS_COARSE_LOCATION))
ActivityCompat.requestPermissions(MainActivity.this,
new String[]Manifest.permission.ACCESS_COARSE_LOCATION, MY_PERMISSIONS_REQUEST_LOCATION);
else
ActivityCompat.requestPermissions(MainActivity.this,
new String[]Manifest.permission.ACCESS_COARSE_LOCATION, MY_PERMISSIONS_REQUEST_LOCATION);
else
LocationManager mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Location location = mLocationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
try
textView.setText(hereLocation(location.getLatitude(), location.getLongitude()));
catch (Exception e)
Toast.makeText(getApplicationContext(), "Not found!",
Toast.LENGTH_SHORT).show();
);
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults)
switch (requestCode)
case MY_PERMISSIONS_REQUEST_LOCATION:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
if (ContextCompat.checkSelfPermission(MainActivity.this,
Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED)
LocationManager mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Location location = mLocationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
try
textView.setText(hereLocation(location.getLatitude(), location.getLongitude()));
catch (Exception e)
Toast.makeText(getApplicationContext(), "Not found!",
Toast.LENGTH_SHORT).show();
else
Toast.makeText(MainActivity.this, "No permission granted!", Toast.LENGTH_SHORT).show();
return;
public String hereLocation(double lat, double lng)
String cur_city_name = "";
Geocoder gcd = new Geocoder(MainActivity.this,
Locale.getDefault());
List<Address> addresses;
try
addresses = gcd.getFromLocation(lat, lng, 1);
if (addresses.size() > 0)
cur_city_name = addresses.get(0).getLocality();
catch (IOException e)
e.printStackTrace();
Toast.makeText(this, "" + cur_city_name, Toast.LENGTH_SHORT).show();
return cur_city_name;
activity_main.xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_
android:layout_
android:orientation="vertical">
<Button
android:id="@+id/button"
android:layout_
android:layout_
android:text="Button"/>
<TextView
android:id="@+id/textView"
android:layout_
android:layout_/>
</LinearLayout>
【问题讨论】：
mLocationManager.getLastKnownLocation() 返回上次缓存的位置，在您需要提供回调的地方使用mLocationManager.requestLocationUpdates()，在该回调中您将收到最新的位置。
@Drickuss Merguez 删除了我的答案。我在这里不做编码工作。我们可以展示你想做的事情，你需要自己尝试:)
【参考方案1】：
试试这个效果很好
public String getAddress(double lats, double lons)
Geocoder geocoder;
double lat = lats;
double lon = lons;
geocoder = new Geocoder(YourActivityName.this, Locale.getDefault());
List<android.location.Address> addresses = null;
try
addresses = geocoder.getFromLocation(lat, lon, 1);
catch (IOException e)
e.printStackTrace();
if (addresses != null)
String address = addresses.get(0).getAddressLine(0);
String city = addresses.get(0).getLocality();
String state = addresses.get(0).getAdminArea();
String country = addresses.get(0).getCountryName();
String postalCode = addresses.get(0).getPostalCode();
String knownName = addresses.get(0).getFeatureName();
return address;
else
return "failed";
【讨论】：
@Drickuss Merguez 如果您需要帮助，请联系我 请查看***.com/questions/41445485/get-the-users-current-city/… @Drickuss Merguez 你需要答案吗？ 拜托！【参考方案2】：参考链接
How to get city name from latitude and longitude coordinates in Google Maps?
Geocoder gcd = new Geocoder(context, Locale.getDefault());
List<Address> addresses = gcd.getFromLocation(lat, lng, 1);
if (addresses.size() > 0)
System.out.println(addresses.get(0).getLocality());
else
// do your staff
【讨论】：
【参考方案3】： Geocoder geocoder;
List<Address> addresses = new ArrayList<Address>();
geocoder = new Geocoder(MapsActivity.this, Locale.getDefault());
try
addresses = geocoder.getFromLocation(lati, longi, 1);
// Here 1 represent max location result to returned, by documents it recommended 1 to 5
// addresses.add();
catch (IOException e)
e.printStackTrace();
if (!addresses.isEmpty())
address = addresses.get(0).getAddressLine(0); // If any additional address line present than only, check with max available address lines by getMaxAddressLineIndex()
city = addresses.get(0).getLocality();
state = addresses.get(0).getAdminArea();
country = addresses.get(0).getCountryName();
postalCode = addresses.get(0).getPostalCode();
【讨论】：
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