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安卓 :How to get Current Location in Longitude and latitude?

转载 作者:行者123 更新时间:2023-11-29 15:40:29 28 4
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当我点击 Button 时,我想将当前位置存储到数据库中。

位置已存储,但它正在接收 0.0,0.0 不知道我的代码中的错误在哪里我在这里发布我的完整代码,请帮助我解决这个问题。

获取当前位置

GetCurrentGPSLocation gps = new GetCurrentGPSLocation(getActivity());

// check if GPS enabled
if (gps.canGetLocation()) {
double latitude = gps.getLatitude();
double longitude = gps.getLongitude();
// \n is for new line
lat.setText( ""+latitude);
longi.setText("" +longitude);
latitude12=lat.getText().toString();
longitude12=longi.getText().toString();
Toast.makeText(getActivity(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();

longi.setVisibility(View.INVISIBLE);
lat.setVisibility(View.INVISIBLE);
} else {
// can't get location
// GPS or Network is not enabled
// Ask user to enable GPS/network in settings
gps.showSettingsAlert();
}

获取当前 GPS 位置

    package com.example.sachin.omcom;

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.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;

public class GetCurrentGPSLocation extends AppCompatActivity 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 GetCurrentGPSLocation(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(GetCurrentGPSLocation.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;
}}

最佳答案

onLocationChanged 每次您的位置更新时都会被调用,因此请保留并更新一个全局值并在您的 Button 上点击该值以执行您想要的操作

 private LatLng latLng;

@Override
public void onLocationChanged(Location location) {
if(location!=null){
latLng = new LatLng(location.getLatitude(), location.getLongitude()); }
}

或者根据时间或距离,您也可以获得位置以及使用 android.location.LocationListener() 请参阅编辑,

如果您想在一段时间后手动调用 onLocationChanged,即使位置未更改,请使用以下

 LocationRequest  mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(30000); //5 seconds
mLocationRequest.setFastestInterval(30000); //3 seconds
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
//mLocationRequest.setSmallestDisplacement(0.1F); //1/10 meter

if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);

编辑 :这是位置监听器,如果需要,您可以单独使用它而无需以上内容

    private LocationManager locationManager;
private android.location.LocationListener myLocationListener;

public void checkLocation() {

String serviceString = Context.LOCATION_SERVICE;
locationManager = (LocationManager) getSystemService(serviceString);


if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}


myLocationListener = new android.location.LocationListener() {
public void onLocationChanged(Location locationListener) {

if (isGPSEnabled(YourActivityName.this)) {
if (locationListener != null) {
if (ActivityCompat.checkSelfPermission(YourActivityName.this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(YourActivityName.this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}

if (locationManager != null) {
location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
} else if (isInternetConnected(YourActivityName.this)) {
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}



}

public void onProviderDisabled(String provider) {

}

public void onProviderEnabled(String provider) {

}

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

}
};

locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, myLocationListener);
}

isInternetConnected 方法

public static boolean isInternetConnected(Context ctx) {
ConnectivityManager connectivityMgr = (ConnectivityManager) ctx
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo wifi = connectivityMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
NetworkInfo mobile = connectivityMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
// Check if wifi or mobile network is available or not. If any of them is
// available or connected then it will return true, otherwise false;
if (wifi != null) {
if (wifi.isConnected()) {
return true;
}
}
if (mobile != null) {
if (mobile.isConnected()) {
return true;
}
}
return false;
}

isGpsEnabled 方法

  public boolean isGPSEnabled(Context mContext) {
LocationManager locationManager = (LocationManager) mContext.getSystemService(Context.LOCATION_SERVICE);
return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
}

注意 :现在不要混淆。这里提到了3种方式。

1.自动使用onLocationChanged

  1. 手动使用 onLocationChanged

  2. 使用 android.location.LocationListener() 添加了完整的实现(这不会帮助您学习,但可以帮助您获取数据。浏览这些行并通过搜索发生的事情来理解它们实际上)

关于安卓 :How to get Current Location in Longitude and latitude?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41310624/

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