如何获取当前位置android？

Posted 2023-04-14

【中文标题】如何获取当前位置android？

【英文标题】：how to get current location android?

【发布时间】：2017-04-01 23:59:09

【问题描述】：

我在这个方法中使用了setLocation();，但位置是null：

locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
try  
    //location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
    location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
    if (location != null) 
        setLocation(location, post);
     else 
        Toast.makeText(ViewAdActivity.this, getResources().getString(R.string.location_not_available), Toast.LENGTH_SHORT).show();
    
 catch (SecurityException e) 

【问题讨论】：

看这里：***.com/questions/17591147/…

请看How do I ask a good question?。

How do I get the current GPS location programmatically in android?的可能重复

检查您的互联网连接是否可用？如果 Internet 被禁用，它将返回 null。

【参考方案1】：

在 manifest.xml 中

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

创建一个名为 GPSTracker.java 的类

import android.app.AlertDialog;
 import android.app.Service;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.location.Location;
 import android.location.LocationListener;  
 import android.location.LocationManager;
 import android.os.Bundle;
 import android.os.IBinder;
 import android.provider.Settings;
 import android.util.Log;

 public class GPSTracker extends Service implements LocationListener 

private final Context mContext;

// flag for GPS status
boolean isGPSEnabled = false;

// flag for network status
boolean isNetworkEnabled = false;

// flag for GPS status
boolean canGetLocation = false;

Location location; // location
double latitude; // latitude
double longitude; // longitude

// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters

// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute

// Declaring a Location Manager
protected LocationManager locationManager;

public GPSTracker(Context context) 
    this.mContext = context;
    getLocation();


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

        // getting GPS status
        isGPSEnabled = locationManager
                .isProviderEnabled(LocationManager.GPS_PROVIDER);

        // getting network status
        isNetworkEnabled = locationManager
                .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

        if (!isGPSEnabled && !isNetworkEnabled) 
            // no network provider is enabled
         else 
            this.canGetLocation = true;
            // First get location from Network Provider
            if (isNetworkEnabled) 
                locationManager.requestLocationUpdates(
                        LocationManager.NETWORK_PROVIDER,
                        MIN_TIME_BW_UPDATES,
                        MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                Log.d("Network", "Network");
                if (locationManager != null) 
                    location = locationManager
                            .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                    if (location != null) 
                        latitude = location.getLatitude();
                        longitude = location.getLongitude();
                    
                
            
            // if GPS Enabled get lat/long using GPS Services
            if (isGPSEnabled) 
                if (location == null) 
                    locationManager.requestLocationUpdates(
                            LocationManager.GPS_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                    Log.d("GPS Enabled", "GPS Enabled");
                    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;


/**
 * Stop using GPS listener
 * Calling this function will stop using GPS in your app
 * */
public void stopUsingGPS()
    if(locationManager != null)
        locationManager.removeUpdates(GPSTracker.this);
           


/**
 * Function to get latitude
 * */
public double getLatitude()
    if(location != null)
        latitude = location.getLatitude();
    

    // return latitude
    return latitude;


/**
 * Function to get longitude
 * */
public double getLongitude()
    if(location != null)
        longitude = location.getLongitude();
    

    // return longitude
    return longitude;


/**
 * Function to check GPS/wifi enabled
 * @return boolean
 * */
public boolean canGetLocation() 
    return this.canGetLocation;


/**
 * Function to show settings alert dialog
 * On pressing Settings button will lauch Settings Options
 * */
public void showSettingsAlert()
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

    // Setting Dialog Title
    alertDialog.setTitle("GPS is settings");

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

    // On pressing Settings button
    alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() 
        public void onClick(DialogInterface dialog,int which) 
            Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            mContext.startActivity(intent);
        
    );

    // on pressing cancel button
    alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() 
        public void onClick(DialogInterface dialog, int which) 
        dialog.cancel();
        
    );

    // Showing Alert Message
    alertDialog.show();


@Override
public void onLocationChanged(Location location) 


@Override
public void onProviderDisabled(String provider) 


@Override
public void onProviderEnabled(String provider) 


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


@Override
public IBinder onBind(Intent arg0) 
    return null;

无论你想在 Activity 或 Adapter 或 Fragment 中获取位置坐标，如下所示：

GPSTracker gps = new GPSTracker(this);
if(gps.canGetLocation()) 
 gps.getLatitude(); // returns latitude
 gps.getLongitude();
 

希望对你有所帮助。

【讨论】：

基于 if(isNetworkEnabled) 和 if(isGPSEnabled) 错误权限

忽略它..没问题

gps.getLatitude(); gps.getLongitude();值为空

你想在哪里获取坐标。在一个活动中？

案例 R.id.iv_view_Image: GPSTracker gps = new GPSTracker(this); if(gps.canGetLocation()) 双纬度 = gps.getLatitude();双经度= gps.getLongitude(); 休息；

【参考方案2】：

检查以下链接。代码允许您根据需要进行自定义！

https://www.javacodegeeks.com/2010/09/android-location-based-services.html