[英]Not getting user location using GPS_PROVIDER / NETWORK_PROVIDER
[英]Get current location name of user without using gps or internet but by using Network_Provider in android
这个问题与“ Android:在不使用gps或互联网时获取用户的当前位置 ”相同的主流stackoverflow问题直接相关,其中接受的答案实际上没有回答问题。
我应该能够通过网络提供商而不是GPS或互联网获取设备的当前位置名称(例如:城市名称,村庄名称)。 以下是该问题的公认答案。 (以下代码部分应包含在onCreate()
方法中)
// Acquire a reference to the system Location Manager
LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
// Define a listener that responds to location updates
LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
// Called when a new location is found by the network location provider.
makeUseOfNewLocation(location);
}
public void onStatusChanged(String provider, int status, Bundle extras) {}
public void onProviderEnabled(String provider) {}
public void onProviderDisabled(String provider) {}
};
// Register the listener with the Location Manager to receive location updates
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
我更改了链接答案中给出的上述代码如下,但没有成功。
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final TextView txtView = (TextView) findViewById(R.id.tv1);
txtView.setText("ayyo samitha");
////
// Acquire a reference to the system Location Manager
LocationManager locationManager;
locationManager= (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
// Define a listener that responds to location updates
LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
// Called when a new location is found by the network location provider.
makeUseOfNewLocation(location);
}
private void makeUseOfNewLocation(Location location) {
txtView.setText("sam came in");
txtView.append(location.toString());
}
public void onStatusChanged(String provider, int status, Bundle extras) {}
public void onProviderEnabled(String provider) {
// makeUseOfNewLocation(location);
}
public void onProviderDisabled(String provider) {}
};
// Register the listener with the Location Manager to receive location updates
if (locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
}
}
如何通过纠正上面的代码或任何其他方法来完成我想要的? 请注意,我想获取位置名称,但不是经度和纬度。 有人能帮帮我吗。
你在这里指的是什么(在旧手机上显示位置名称)是使用“小区广播”(或“CB”)完成的。 这与Location API或其任何变体完全无关。
小区塔可以发送可以由设备接收的广播信息(诸如“一对多SMS”之类的东西)。 一些运营商使用Cell Broadcast来广播蜂窝塔所在位置的名称。 一些运营商已经使用小区广播来广播小区塔的位置(纬度/经度)。 一些运营商使用Cell Broadcast发送广告代码。 CB广播消息中包含的信息没有标准,每个移动运营商都可以选择是否使用。
由于大多数运营商不发送这些消息,因此在尝试接收和解码它们时可能没有任何意义。 但是如果你想尝试,你可以注册一个BroadcastReceiver
监听这个Intent
动作: android.provider.Telephony.SMS_CB_RECEIVED
。 有关Intent
包含哪些数据的更多详细信息,请参阅文档 。
根据Android文档使用LocationManager
不是当前推荐的API(参见参考资料 ):
The Google Play services location APIs are preferred over the
Android framework location APIs (android.location) as a way of
adding location awareness to your app.
要了解如何设置的谷歌服务客户端库,请参阅安装在谷歌Play服务指南。
将Google服务客户端库链接到应用后,您可以使用FusedLocationProviderApi
实现用户位置:
import android.location.Location;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacks;
import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener;
import com.google.android.gms.common.api.PendingResult;
import com.google.android.gms.common.api.ResultCallback;
import com.google.android.gms.common.api.Status;
import com.google.android.gms.location.FusedLocationProviderApi;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
public class MainActivity extends ActionBarActivity
implements ConnectionCallbacks, OnConnectionFailedListener {
// ..
private GoogleApiClient mGoogleAPIClient;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// create google api client object
mGoogleAPIClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
}
@Override
protected void onStart() {
super.onStart();
mGoogleAPIClient.connect();
}
@Override
protected void onStop() {
super.onStop();
mGoogleAPIClient.disconnect();
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Toast.makeText(this,
"Could not connect to Google Play Services",
Toast.LENGTH_SHORT).show();
finish();
}
@Override
public void onConnected(Bundle bundle) {
Log.i(TAG,
"Successfuly connect to Google Play Services");
// retrieve last location once connected
Location lastLocation = LocationServices.FusedLocationApi
.getLastLocation(mGoogleAPIClient);
if (lastLocation == null) {
// should request new one
// location should be enabled
Log.i(TAG,
"No location data previously acquired.. should request!");
Toast.makeText(this,
"Requesting location data ..",
Toast.LENGTH_SHORT).show();
LocationRequest locationRequest = LocationRequest.create();
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationRequest.setInterval(5000);
PendingResult<Status> result = LocationServices.FusedLocationApi
.requestLocationUpdates(mGoogleAPIClient,
locationRequest,
new LocationListener() {
@Override
public void onLocationChanged(Location location) {
makeUseOfNewLocation(location);
}
});
// TODO: use result to retrieve more info
} else {
makeUseOfNewLocation(lastLocation);
}
}
@Override
public void onConnectionSuspended(int i) {
}
private void makeUseOfNewLocation(Location location) {
// do your stuff here
}
我已经测试了上面的代码,它可以在没有互联网连接的情况下工作,但它要求用户在设备上启用位置功能 此外,它还要求用户已将位置记录功能启用到位置功能。
希望这对你有所帮助。
问题是您尝试的代码确实有效,可能不如您所希望的那么好。 例如,三星Galaxy S3上提供的这种方法的准确度是2000m,这意味着实际位置是在2公里半径范围内的任何位置。 此外,在您的应用程序被告知位置更改之前,可能需要进行相当大的位置更改,因为错误幅度非常大。
需要GPS或LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY
(如果使用Google Play服务)才能获得相当不错的位置。 这确实需要android.permission.ACCESS_FINE_LOCATION
,但是除非你只需要km级精度,否则这个权限是必须的。
最后请注意,使用带有LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY
Google Play服务,我可以在不打开GPS的情况下获得精确到10米的位置数据,因此这仍然可以满足您的要求。
以下是一个完整的例子:
AndroidManifest.xml中
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
MainActivity.java
import android.app.Activity;
import android.location.Location;
import android.os.Bundle;
import android.widget.TextView;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacks;
import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener;
import com.google.android.gms.location.FusedLocationProviderApi;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
public class MainActivity extends Activity implements
com.google.android.gms.location.LocationListener, ConnectionCallbacks,
OnConnectionFailedListener {
private final FusedLocationProviderApi fusedLocationProviderApi = LocationServices.FusedLocationApi;
private GoogleApiClient mGoogleAPIClient;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mGoogleAPIClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API).addConnectionCallbacks(this)
.addOnConnectionFailedListener(this).build();
}
@Override
protected void onResume() {
super.onResume();
mGoogleAPIClient.connect();
}
@Override
protected void onPause() {
super.onPause();
if (mGoogleAPIClient != null) {
mGoogleAPIClient.disconnect();
}
}
@Override
public void onConnected(Bundle arg0) {
final LocationRequest locationRequest = LocationRequest.create();
locationRequest
.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
locationRequest.setInterval(30 * 1000);
locationRequest.setFastestInterval(5 * 1000);
fusedLocationProviderApi.requestLocationUpdates(mGoogleAPIClient,
locationRequest, this);
}
@Override
public void onConnectionSuspended(int arg0) {
// TODO Auto-generated method stub
}
@Override
public void onConnectionFailed(ConnectionResult arg0) {
// TODO Auto-generated method stub
}
@Override
public void onLocationChanged(Location location) {
// the location is no more than 10 min old, and with reasonable
// accurarcy (50m), done
if (System.currentTimeMillis() < location.getTime() + 10 * 60 * 1000
&& location.getAccuracy() < 50) {
mGoogleAPIClient.disconnect();
mGoogleAPIClient = null;
((TextView) findViewById(R.id.test)).setText(location.toString());
}
}
}
您可以尝试使用Locale对象或使用Telephony服务获得国家/地区级别的准确性。 无需互联网或GPS。
从Locale获取国家/地区代码:
String locale = context.getResources().getConfiguration().locale.getCountry();
从Android的电话服务获取国家/地区代码:
TelephonyManager tm = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
// Will work on all networks. Only provide the SIM card's country
String countryCode = tm.getSimCountryIso();
// Might not work well on CDMA networks. Will provide the country code
// for the country the device is currently in.
String currentCountryCode = tm.getNetworkCountryIso();
更好的代码示例和讨论在这里 。
试试这个代码..
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
public class AppLocationService extends Service implements LocationListener {
protected LocationManager locationManager;
Location location;
private static final long MIN_DISTANCE_FOR_UPDATE = 10;
private static final long MIN_TIME_FOR_UPDATE = 1000 * 60 * 2;
public AppLocationService(Context context) {
locationManager = (LocationManager) context
.getSystemService(LOCATION_SERVICE);
}
public Location getLocation(String provider) {
if (locationManager.isProviderEnabled(provider)) {
locationManager.requestLocationUpdates(provider,
MIN_TIME_FOR_UPDATE, MIN_DISTANCE_FOR_UPDATE, this);
if (locationManager != null) {
location = locationManager.getLastKnownLocation(provider);
return location;
}
}
return null;
}
@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;
}
}
而下一堂课是
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class AndroidLocationActivity extends Activity {
Button btnGPSShowLocation;
Button btnNWShowLocation;
AppLocationService appLocationService;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
appLocationService = new AppLocationService(
AndroidLocationActivity.this);
btnGPSShowLocation = (Button) findViewById(R.id.btnGPSShowLocation);
btnGPSShowLocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Location gpsLocation = appLocationService
.getLocation(LocationManager.GPS_PROVIDER);
if (gpsLocation != null) {
double latitude = gpsLocation.getLatitude();
double longitude = gpsLocation.getLongitude();
Toast.makeText(
getApplicationContext(),
"Mobile Location (GPS): \nLatitude: " + latitude
+ "\nLongitude: " + longitude,
Toast.LENGTH_LONG).show();
} else {
showSettingsAlert("GPS");
}
}
});
btnNWShowLocation = (Button) findViewById(R.id.btnNWShowLocation);
btnNWShowLocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Location nwLocation = appLocationService
.getLocation(LocationManager.NETWORK_PROVIDER);
if (nwLocation != null) {
double latitude = nwLocation.getLatitude();
double longitude = nwLocation.getLongitude();
Toast.makeText(
getApplicationContext(),
"Mobile Location (NW): \nLatitude: " + latitude
+ "\nLongitude: " + longitude,
Toast.LENGTH_LONG).show();
} else {
showSettingsAlert("NETWORK");
}
}
});
}
public void showSettingsAlert(String provider) {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(
AndroidLocationActivity.this);
alertDialog.setTitle(provider + " SETTINGS");
alertDialog
.setMessage(provider + " is not enabled! Want to go to settings menu?");
alertDialog.setPositiveButton("Settings",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(
Settings.ACTION_LOCATION_SOURCE_SETTINGS);
AndroidLocationActivity.this.startActivity(intent);
}
});
alertDialog.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
alertDialog.show();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
并且给出了此用户权限
<!-- to get location using GPS -->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<!-- to get location using NetworkProvider -->
<uses-permission android:name="android.permission.INTERNET" />
祝你好运。 它被称为地理编码器。 或者更具体地说,反向地理编码以将坐标转换为人类可读输出。 我相当肯定谷歌提供的是付费服务,但你可以免费获得一堆。 因此,请尽可能计划缓存结果并使用缓存结果。
List<Address> list = geoCoder.getFromLocation(location
.getLatitude(), location.getLongitude(), 1);
if (list != null & list.size() > 0) {
Address address = list.get(0);
result = address.getLocality();
return result;
https://developer.android.com/training/location/display-address.html
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