纬度不显示android
我只是试着调试,确保得到正确的经度和纬度信息。使用TextView显示纬度和经度时,经度显示正确,但无论我使用的是网络_提供程序还是GPS_提供程序,纬度始终为0.0。这是一个普遍的问题吗?我把纬度和经度一模一样,所以我不清楚为什么它不起作用。提前谢谢你的帮助 这是我的位置代码,以防万一(注意变量名):纬度不显示android,android,Android,我只是试着调试,确保得到正确的经度和纬度信息。使用TextView显示纬度和经度时,经度显示正确,但无论我使用的是网络_提供程序还是GPS_提供程序,纬度始终为0.0。这是一个普遍的问题吗?我把纬度和经度一模一样,所以我不清楚为什么它不起作用。提前谢谢你的帮助 这是我的位置代码,以防万一(注意变量名): 首先,您要将此代码用于获取设备当前位置 package com.deals; import android.app.AlertDialog; import android.app.Servic
首先,您要将此代码用于获取设备当前位置
package com.deals;
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;
}
}
这段代码将主要活动放在创建方法上
gps = new GPSTracker(getActivity());
if (gps.canGetLocation()) {
latitude = gps.getLatitude();
longitude = gps.getLongitude();
// Toast.makeText(
// getApplicationContext(),
// "Your Location is - \nLat: " + latitude + "\nLong: "
// + longitude, Toast.LENGTH_LONG).show();
} else {
gps.showSettingsAlert();
}
Log.e("latlong", "" + latitude + "" + longitude);
LocationManager即将被弃用。你一定要迁移到Google Location API。谢谢。反应很好。我不知道这是如何不断更新的位置,虽然。我想我们使用回调方法(即onLocationChanged)来确保这一点。嘿@smashueatu我确信它在设备上的位置会随着时间的变化而变化,它的lat和long是变化的,并且工作正常。我在当前应用程序及其完成的工作中使用此代码。getActivity做什么?我只是试着按照你说的方式复制/粘贴你的代码,它唯一不喜欢的是onCreate方法中的getActivity()部分是的,我对我的片段使用getActivity()。您有时间使用“您的城市名称。此”。获取应用程序()。这是正确的工作方式。
gps = new GPSTracker(getActivity());
if (gps.canGetLocation()) {
latitude = gps.getLatitude();
longitude = gps.getLongitude();
// Toast.makeText(
// getApplicationContext(),
// "Your Location is - \nLat: " + latitude + "\nLong: "
// + longitude, Toast.LENGTH_LONG).show();
} else {
gps.showSettingsAlert();
}
Log.e("latlong", "" + latitude + "" + longitude);