如何在Android中以编程方式获取当前的GPS位置？
我需要以编程方式使用GPS获取当前位置。 我怎么能实现它？
我已经创build了一个一步一步的描述小型应用程序获取当前位置的GPS坐标。
完整的示例源代码位于获取当前位置坐标，城市名称 – 在Android中 。
看看它怎么运作：
-
我们所要做的就是在清单文件中添加这个权限：
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> -
然后像这样创build一个LocationManager实例：
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); -
检查GPS是否启用。
-
然后实现LocationListener并获取坐标：
LocationListener locationListener = new MyLocationListener(); locationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 5000, 10, locationListener); -
这里是示例代码
/*---------- Listener class to get coordinates ------------- */ private class MyLocationListener implements LocationListener { @Override public void onLocationChanged(Location loc) { editLocation.setText(""); pb.setVisibility(View.INVISIBLE); Toast.makeText( getBaseContext(), "Location changed: Lat: " + loc.getLatitude() + " Lng: " + loc.getLongitude(), Toast.LENGTH_SHORT).show(); String longitude = "Longitude: " + loc.getLongitude(); Log.v(TAG, longitude); String latitude = "Latitude: " + loc.getLatitude(); Log.v(TAG, latitude); /*------- To get city name from coordinates -------- */ String cityName = null; Geocoder gcd = new Geocoder(getBaseContext(), Locale.getDefault()); List<Address> addresses; try { addresses = gcd.getFromLocation(loc.getLatitude(), loc.getLongitude(), 1); if (addresses.size() > 0) { System.out.println(addresses.get(0).getLocality()); cityName = addresses.get(0).getLocality(); } } catch (IOException e) { e.printStackTrace(); } String s = longitude + "\n" + latitude + "\n\nMy Current City is: " + cityName; editLocation.setText(s); } @Override public void onProviderDisabled(String provider) {} @Override public void onProviderEnabled(String provider) {} @Override public void onStatusChanged(String provider, int status, Bundle extras) {} }
这是其他信息的其他答案。
由于Android有
GPS_PROVIDER and NETWORK_PROVIDER
您可以注册到两者并同时从两个onLocationChanged(Location location)开始提取事件。 到现在为止还挺好。 现在的问题是我们需要两个结果，还是应该采取最好的。 因为我知道GPS_PROVIDER结果比NETWORK_PROVIDER有更好的准确性。
我们来定义Location字段：
private Location currentBestLocation = null;
在我们开始监听位置更改之前，我们将执行以下方法。 此方法返回GPS和networking之间的最后一个已知位置。 对于这种方法更新是最好的。
/** * @return the last know best location */ private Location getLastBestLocation() { Location locationGPS = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); Location locationNet = mLocationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER); long GPSLocationTime = 0; if (null != locationGPS) { GPSLocationTime = locationGPS.getTime(); } long NetLocationTime = 0; if (null != locationNet) { NetLocationTime = locationNet.getTime(); } if ( 0 < GPSLocationTime - NetLocationTime ) { return locationGPS; } else { return locationNet; } }
每次我们检索一个新的位置时，我们都会将它与之前的结果进行比较。
... static final int TWO_MINUTES = 1000 * 60 * 2; ...
我添加一个新的方法onLocationChanged ：
@override public void onLocationChanged(Location location) { makeUseOfNewLocation(location); if(currentBestLocation == null){ currentBestLocation = location; } .... } /** * This method modify the last know good location according to the arguments. * * @param location The possible new location. */ void makeUseOfNewLocation(Location location) { if ( isBetterLocation(location, currentBestLocation) ) { currentBestLocation = location; } } .... /** Determines whether one location reading is better than the current location fix * @param location The new location that you want to evaluate * @param currentBestLocation The current location fix, to which you want to compare the new one. */ protected boolean isBetterLocation(Location location, Location currentBestLocation) { if (currentBestLocation == null) { // A new location is always better than no location return true; } // Check whether the new location fix is newer or older long timeDelta = location.getTime() - currentBestLocation.getTime(); boolean isSignificantlyNewer = timeDelta > TWO_MINUTES; boolean isSignificantlyOlder = timeDelta < -TWO_MINUTES; boolean isNewer = timeDelta > 0; // If it's been more than two minutes since the current location, use the new location, // because the user has likely moved. if (isSignificantlyNewer) { return true; // If the new location is more than two minutes older, it must be worse. } else if (isSignificantlyOlder) { return false; } // Check whether the new location fix is more or less accurate int accuracyDelta = (int) (location.getAccuracy() - currentBestLocation.getAccuracy()); boolean isLessAccurate = accuracyDelta > 0; boolean isMoreAccurate = accuracyDelta < 0; boolean isSignificantlyLessAccurate = accuracyDelta > 200; // Check if the old and new location are from the same provider boolean isFromSameProvider = isSameProvider(location.getProvider(), currentBestLocation.getProvider()); // Determine location quality using a combination of timeliness and accuracy if (isMoreAccurate) { return true; } else if (isNewer && !isLessAccurate) { return true; } else if (isNewer && !isSignificantlyLessAccurate && isFromSameProvider) { return true; } return false; } /** Checks whether two providers are the same */ private boolean isSameProvider(String provider1, String provider2) { if (provider1 == null) { return provider2 == null; } return provider1.equals(provider2); } ....
您可以通过GPS_PROVIDER or NETWORK_PROVIDERfind位置。
Android中位置服务的概述。
这里是一个例子，试图find使用GPS的位置。 如果您的GPS不可用，请尝试使用networking查找位置。
GPSTracker.java
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; 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 latitude/longitude 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/Wi-Fi enabled * @return boolean * */ public boolean canGetLocation() { return this.canGetLocation; } /** * Function to show settings alert dialog. * On pressing the Settings button it will launch 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 the 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 the 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; } }
活动-AndroidGPSTrackingActivity.java
public class AndroidGPSTrackingActivity extends Activity { Button btnShowLocation; // GPSTracker class GPSTracker gps; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); btnShowLocation = (Button) findViewById(R.id.btnShowLocation); // Show location button click event btnShowLocation.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // Create class object gps = new GPSTracker(AndroidGPSTrackingActivity.this); // Check if GPS enabled if(gps.canGetLocation()) { double latitude = gps.getLatitude(); double longitude = gps.getLongitude(); // \n is for new line Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show(); } else { // Can't get location. // GPS or network is not enabled. // Ask user to enable GPS/network in settings. gps.showSettingsAlert(); } } }); } }
Layout- main.xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <Button android:id="@+id/btnShowLocation" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Show Location" android:layout_centerVertical="true" android:layout_centerHorizontal="true"/> </RelativeLayout>
AndroidManifest.xml中
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.INTERNET" />
由于我不喜欢其他答案的一些代码，这里是我的简单的解决scheme。 该解决scheme旨在用于活动或服务中来跟踪位置。 它确保它永远不会返回过时的数据，除非您明确请求陈旧的数据。 可以在callback模式下运行，以便在我们收到更新时运行，也可以在轮询模式下轮询最新的信息。
通用LocationTracker界面。 允许我们有多种types的位置跟踪器，并轻松地插入适当的位置跟踪器：
package com.gabesechan.android.reusable.location; import android.location.Location; public interface LocationTracker { public interface LocationUpdateListener{ public void onUpdate(Location oldLoc, long oldTime, Location newLoc, long newTime); } public void start(); public void start(LocationUpdateListener update); public void stop(); public boolean hasLocation(); public boolean hasPossiblyStaleLocation(); public Location getLocation(); public Location getPossiblyStaleLocation(); }
ProviderLocationTracker-这个类将跟踪GPS或NETWORK的位置。
package com.gabesechan.android.reusable.location; import android.content.Context; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; public class ProviderLocationTracker implements LocationListener, LocationTracker { // The minimum distance to change Updates in meters private static final long MIN_UPDATE_DISTANCE = 10; // The minimum time between updates in milliseconds private static final long MIN_UPDATE_TIME = 1000 * 60; private LocationManager lm; public enum ProviderType{ NETWORK, GPS }; private String provider; private Location lastLocation; private long lastTime; private boolean isRunning; private LocationUpdateListener listener; public ProviderLocationTracker(Context context, ProviderType type) { lm = (LocationManager)context.getSystemService(Context.LOCATION_SERVICE); if(type == ProviderType.NETWORK){ provider = LocationManager.NETWORK_PROVIDER; } else{ provider = LocationManager.GPS_PROVIDER; } } public void start(){ if(isRunning){ //Already running, do nothing return; } //The provider is on, so start getting updates. Update current location isRunning = true; lm.requestLocationUpdates(provider, MIN_UPDATE_TIME, MIN_UPDATE_DISTANCE, this); lastLocation = null; lastTime = 0; return; } public void start(LocationUpdateListener update) { start(); listener = update; } public void stop(){ if(isRunning){ lm.removeUpdates(this); isRunning = false; listener = null; } } public boolean hasLocation(){ if(lastLocation == null){ return false; } if(System.currentTimeMillis() - lastTime > 5 * MIN_UPDATE_TIME){ return false; //stale } return true; } public boolean hasPossiblyStaleLocation(){ if(lastLocation != null){ return true; } return lm.getLastKnownLocation(provider)!= null; } public Location getLocation(){ if(lastLocation == null){ return null; } if(System.currentTimeMillis() - lastTime > 5 * MIN_UPDATE_TIME){ return null; //stale } return lastLocation; } public Location getPossiblyStaleLocation(){ if(lastLocation != null){ return lastLocation; } return lm.getLastKnownLocation(provider); } public void onLocationChanged(Location newLoc) { long now = System.currentTimeMillis(); if(listener != null){ listener.onUpdate(lastLocation, lastTime, newLoc, now); } lastLocation = newLoc; lastTime = now; } public void onProviderDisabled(String arg0) { } public void onProviderEnabled(String arg0) { } public void onStatusChanged(String arg0, int arg1, Bundle arg2) { } }
这是FallbackLocationTracker，它将跟踪GPS和NETWORK，并使用任何位置更准确。
package com.gabesechan.android.reusable.location; import android.content.Context; import android.location.Location; import android.location.LocationManager; public class FallbackLocationTracker implements LocationTracker, LocationTracker.LocationUpdateListener { private boolean isRunning; private ProviderLocationTracker gps; private ProviderLocationTracker net; private LocationUpdateListener listener; Location lastLoc; long lastTime; public FallbackLocationTracker(Context context) { gps = new ProviderLocationTracker(context, ProviderLocationTracker.ProviderType.GPS); net = new ProviderLocationTracker(context, ProviderLocationTracker.ProviderType.NETWORK); } public void start(){ if(isRunning){ //Already running, do nothing return; } //Start both gps.start(this); net.start(this); isRunning = true; } public void start(LocationUpdateListener update) { start(); listener = update; } public void stop(){ if(isRunning){ gps.stop(); net.stop(); isRunning = false; listener = null; } } public boolean hasLocation(){ //If either has a location, use it return gps.hasLocation() || net.hasLocation(); } public boolean hasPossiblyStaleLocation(){ //If either has a location, use it return gps.hasPossiblyStaleLocation() || net.hasPossiblyStaleLocation(); } public Location getLocation(){ Location ret = gps.getLocation(); if(ret == null){ ret = net.getLocation(); } return ret; } public Location getPossiblyStaleLocation(){ Location ret = gps.getPossiblyStaleLocation(); if(ret == null){ ret = net.getPossiblyStaleLocation(); } return ret; } public void onUpdate(Location oldLoc, long oldTime, Location newLoc, long newTime) { boolean update = false; //We should update only if there is no last location, the provider is the same, or the provider is more accurate, or the old location is stale if(lastLoc == null){ update = true; } else if(lastLoc != null && lastLoc.getProvider().equals(newLoc.getProvider())){ update = true; } else if(newLoc.getProvider().equals(LocationManager.GPS_PROVIDER)){ update = true; } else if (newTime - lastTime > 5 * 60 * 1000){ update = true; } if(update){ if(listener != null){ listener.onUpdate(lastLoc, lastTime, newLoc, newTime); } lastLoc = newLoc; lastTime = newTime; } } }
由于两者都实现LocationTracker界面，因此您可以轻松改变想法来使用哪一个界面。 要以轮询模式运行这个类，只需调用start（）。 要在更新模式下运行，请调用start（Listener）。
也看看我的博客文章的代码
在那里已经有很多答案了，但是我想用Google API来展示最新的获取位置的方法，所以新的程序员可以使用新的方法：
我已经在我的博客demonuts.com上编写了android中当前位置的详细教程。您还可以find使用android studio开发的完整源代码。
首先把这个放在gradle文件里
compile 'com.google.android.gms:play-services:9.0.2'
然后实现必要的接口
public class MainActivity extends BaseActivitiy implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, com.google.android.gms.location.LocationListener
声明实例
private GoogleApiClient mGoogleApiClient; private Location mLocation; private LocationManager locationManager; private LocationRequest mLocationRequest;
把这个放在onCreate()
mGoogleApiClient = new GoogleApiClient.Builder(this) .addConnectionCallbacks(this) .addOnConnectionFailedListener(this) .addApi(LocationServices.API) .build(); locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
最后，重写必要的方法
@Override public void onConnected(Bundle bundle) { if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { // TODO: Consider calling // ActivityCompat#requestPermissions // here to request the missing permissions, and then overriding // public void onRequestPermissionsResult(int requestCode, String[] permissions, // int[] grantResults) // to handle the case where the user grants the permission. See the documentation // for ActivityCompat#requestPermissions for more details. return; } startLocationUpdates(); mLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient); if(mLocation == null){ startLocationUpdates(); } if (mLocation != null) { double latitude = mLocation.getLatitude(); double longitude = mLocation.getLongitude(); } else { // Toast.makeText(this, "Location not Detected", Toast.LENGTH_SHORT).show(); } } protected void startLocationUpdates() { // Create the location request mLocationRequest = LocationRequest.create() .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY) .setInterval(UPDATE_INTERVAL) .setFastestInterval(FASTEST_INTERVAL); // Request location updates if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { // TODO: Consider calling // ActivityCompat#requestPermissions // here to request the missing permissions, and then overriding // public void onRequestPermissionsResult(int requestCode, String[] permissions, // int[] grantResults) // to handle the case where the user grants the permission. See the documentation // for ActivityCompat#requestPermissions for more details. return; } LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this); Log.d("reque", "--->>>>"); } @Override public void onConnectionSuspended(int i) { Log.i(TAG, "Connection Suspended"); mGoogleApiClient.connect(); } @Override public void onConnectionFailed(ConnectionResult connectionResult) { Log.i(TAG, "Connection failed. Error: " + connectionResult.getErrorCode()); } @Override public void onStart() { super.onStart(); mGoogleApiClient.connect(); } @Override public void onStop() { super.onStop(); if (mGoogleApiClient.isConnected()) { mGoogleApiClient.disconnect(); } } @Override public void onLocationChanged(Location location) { }
在运行应用程序之前，不要忘记在设备中启动GPS。
获取gps的位置 –
LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE); LocationListener locationListener = new LocationListener() { @Override public void onStatusChanged(String provider, int status, Bundle extras) { // TODO Auto-generated method stub } @Override public void onProviderEnabled(String provider) { // TODO Auto-generated method stub } @Override public void onProviderDisabled(String provider) { // TODO Auto-generated method stub } @Override public void onLocationChanged(Location location) { // TODO Auto-generated method stub double latitude = location.getLatitude(); double longitude = location.getLongitude(); double speed = location.getSpeed(); //spedd in meter/minute speed = (speed*3600)/1000; // speed in km/minute Toast.makeText(GraphViews.this, "Current speed:" + location.getSpeed(),Toast.LENGTH_SHORT).show(); } }; locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener); }
你需要使用最新的/最新的
GoogleApiClient Api
基本上你需要做的是：
private GoogleApiClient mGoogleApiClient; mGoogleApiClient = new GoogleApiClient.Builder(this) .addApi(LocationServices.API) .addConnectionCallbacks(this) .addOnConnectionFailedListener(this) .build();
然后
@Override public void onConnected(Bundle connectionHint) { mLastLocation = LocationServices.FusedLocationApi.getLastLocation( mGoogleApiClient); if (mLastLocation != null) { mLatitudeText.setText(String.valueOf(mLastLocation.getLatitude())); mLongitudeText.setText(String.valueOf(mLastLocation.getLongitude())); } }
为最准确和可靠的位置。 在这里看到我的post：
https://stackoverflow.com/a/33599228/2644905
不要使用不准确，延迟响应的LocationListener。 说实话这更容易实现。 另请阅读文档： https ： //developers.google.com/android/reference/com/google/android/gms/common/api/GoogleApiClient
class MyLocation { Timer timer1; LocationManager lm; LocationResult locationResult; boolean gps_enabled = false; boolean network_enabled = false; public boolean getLocation(Context context, LocationResult result) { // I use LocationResult callback class to pass location value from // MyLocation to user code. locationResult = result; if (lm == null) lm = (LocationManager) context .getSystemService(Context.LOCATION_SERVICE); // Exceptions will be thrown if the provider is not permitted. try { gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER); } catch (Exception ex) { } try { network_enabled = lm .isProviderEnabled(LocationManager.NETWORK_PROVIDER); } catch (Exception ex) { } // Don't start listeners if no provider is enabled. if (!gps_enabled && !network_enabled) return false; if (gps_enabled) lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps); if (network_enabled) lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork); timer1 = new Timer(); timer1.schedule(new GetLastLocation(), 5000); return true; } LocationListener locationListenerGps = new LocationListener() { public void onLocationChanged(Location location) { timer1.cancel(); locationResult.gotLocation(location); lm.removeUpdates(this); lm.removeUpdates(locationListenerNetwork); } public void onProviderDisabled(String provider) { } public void onProviderEnabled(String provider) { } public void onStatusChanged(String provider, int status, Bundle extras) { } }; LocationListener locationListenerNetwork = new LocationListener() { public void onLocationChanged(Location location) { timer1.cancel(); locationResult.gotLocation(location); lm.removeUpdates(this); lm.removeUpdates(locationListenerGps); } public void onProviderDisabled(String provider) { } public void onProviderEnabled(String provider) { } public void onStatusChanged(String provider, int status, Bundle extras) { } }; class GetLastLocation extends TimerTask { @Override public void run() { lm.removeUpdates(locationListenerGps); lm.removeUpdates(locationListenerNetwork); Location net_loc = null, gps_loc = null; if (gps_enabled) gps_loc = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER); if (network_enabled) net_loc = lm .getLastKnownLocation(LocationManager.NETWORK_PROVIDER); // If there are both values, use the latest one. if (gps_loc != null && net_loc != null) { if (gps_loc.getTime() > net_loc.getTime()) locationResult.gotLocation(gps_loc); else locationResult.gotLocation(net_loc); return; } if (gps_loc != null) { locationResult.gotLocation(gps_loc); return; } if (net_loc != null) { locationResult.gotLocation(net_loc); return; } locationResult.gotLocation(null); } } public static abstract class LocationResult { public abstract void gotLocation(Location location); } }
我希望这会帮助你…
现在Google Play位置服务已经在这里，我build议开发者开始使用新的融合位置提供商。 你会发现它更容易使用，更准确。 请观看创build新的Google Play位置服务API的两个人的Google I / Ovideo“ 超越蓝点：Android位置的新function” 。
我一直在很多移动平台上使用位置API，我认为这两个人做的真的是革命性的。 它摆脱了使用各种提供商的巨大数量的复杂性。 Stack Overflow充满了关于使用哪个提供者，是否使用最后一个已知位置，如何在LocationManager上设置其他属性的问题等。他们构build的这个新API消除了大部分不确定性，并使位置服务使用。
我编写了一个Android应用程序，定期使用Google Play位置服务获取位置，并将位置发送到Web服务器，并存储在数据库中，并可在Google地图上查看。 I've written both the client software (for Android, iOS, Windows Phone and Java ME ) and the server software (for ASP.NET and SQL Server or PHP and MySQL ). The software is written in the native language on each platform and works properly in the background on each. Lastly, the software has the MIT License . You can find the Android client here:
https://github.com/nickfox/GpsTracker/tree/master/phoneClients/android
LocationManager is a class that provides in-build methods to get last know location
STEP 1 :Create a LocationManager Object as below
LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
STEP 2 : Add Criteria
*Criteria is use for setting accuracy* Criteria criteria = new Criteria(); int currentapiVersion = android.os.Build.VERSION.SDK_INT; if (currentapiVersion >= android.os.Build.VERSION_CODES.HONEYCOMB) { criteria.setSpeedAccuracy(Criteria.ACCURACY_HIGH); criteria.setAccuracy(Criteria.ACCURACY_FINE); criteria.setAltitudeRequired(true); criteria.setBearingRequired(true); criteria.setSpeedRequired(true); }
STEP 3 :GET Avaliable Provider
Threre are two types of provider GPS and network
String provider = locationManager.getBestProvider(criteria, true);
STEP 4: Get Last Know Location
Location location = locationManager.getLastKnownLocation(provider);
STEP 5: Get Latitude and Longitude
If location object is null then dont try to call below method s
getLatitude and getLongitude is methods which returns double values
Getting location updates requires lots of bolierplate code in Android, You need to take care of
- Google Play services availablity Check,
- Update Google play Service if it is old or not available
- Dialog Creation of GoogleApiClient and its callbacks connected,disconnected etc.
- Stopping and releasing resources for location updates
- Handling Location permission scenarios
- Checking Location services are On or Off
- Getting lastknown location is not so easy either
- Fallback to last known location if not getting location after certain duration
To ease out all these steps i have created Android-EasyLocation (small android library) which will take care all this stuff and you can focus on business logic.
All you need is extend EasyLocationActivity and this
requestSingleLocationFix(easyLocationRequest);
要么
requestLocationUpdates(easyLocationRequest);
Checkout sample app and steps needed here at https://github.com/akhgupta/Android-EasyLocation
Simplest you can find
package com.javapapers.android.geolocationfinder; import android.os.Bundle; import android.app.Activity; import android.content.Context; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.widget.TextView; import android.util.Log; public class MainActivity extends Activity implements LocationListener{ protected LocationManager locationManager; protected LocationListener locationListener; protected Context context; TextView txtLat; String lat; String provider; protected String latitude,longitude; protected boolean gps_enabled,network_enabled; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); txtLat = (TextView) findViewById(R.id.textview1); locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this); } @Override public void onLocationChanged(Location location) { txtLat = (TextView) findViewById(R.id.textview1); txtLat.setText("Latitude:" + location.getLatitude() + ", Longitude:" + location.getLongitude()); } @Override public void onProviderDisabled(String provider) { Log.d("Latitude","disable"); } @Override public void onProviderEnabled(String provider) { Log.d("Latitude","enable"); } @Override public void onStatusChanged(String provider, int status, Bundle extras) { Log.d("Latitude","status"); } }
If you are creating new location projects for Android you should use the new Google Play location services. It is much more accurate and much simpler to use.
I have been working on an open source GPS tracker project , GpsTracker, for several years. I recently updated it to handle periodic updates from Android, iOS, Windows Phone and Java ME cell phones. It is fully functional and does what you need and has the MIT License .
The Android project within GpsTracker uses the new Google Play services and there are also two server stacks ( ASP.NET and PHP ) to allow you to track those phones.
For just location checking you can use following code. You can put it in your onStart() of main activity and display alert dialog if return is false.
private boolean isLocationAccurate() { if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) { String provider = Settings.Secure .getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED); if (provider != null && !provider.contains("gps")) { return false; } } else { try { int status = Settings.Secure .getInt(this.getContentResolver(), Settings.Secure.LOCATION_MODE); if (status != Settings.Secure.LOCATION_MODE_HIGH_ACCURACY) { return false; } } catch (Settings.SettingNotFoundException e) { Log.e(TAG, e.getMessage()); } } return true; }
I have made a project from which we can get the accurate location using Google Play Services, GPS and Network providers. This project can be found here .
Strategy in finding the best location is that first get the location from google play services if location is found then check weather it is better or not, if location found is null restart google play services and try to fetch the location from Android Location API. Register the location on change listeners and when ever the better location is found the call back returns it to the main activity.
It is very simple to use and implement in code only two classes we need to embed ie LocationManagerInterface and SmartLocationManager , LocationActivity is implementing the interface and using SmartLocationManager to fetch location.
/** * Created by Syed Raza Mehdi Naqvi on 8/10/2016. */ public interface LocationManagerInterface { String TAG = LocationManagerInterface.class.getSimpleName(); void locationFetched(Location mLocation, Location oldLocation, String time, String locationProvider); }
here is the location manager class
import android.Manifest; import android.app.Activity; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.IntentSender; import android.content.pm.PackageManager; import android.location.Location; import android.location.LocationManager; import android.os.Build; import android.os.Bundle; import android.support.v4.app.ActivityCompat; import android.support.v4.content.ContextCompat; import android.support.v7.app.AlertDialog; import android.util.Log; import android.widget.Toast; import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.GooglePlayServicesUtil; import com.google.android.gms.common.api.GoogleApiClient; import com.google.android.gms.location.LocationListener; import com.google.android.gms.location.LocationRequest; import com.google.android.gms.location.LocationServices; import java.text.DateFormat; import java.util.Date; /** * Created by Syed Raza Mehdi Naqvi on 8/9/2016. */ public class SmartLocationManager implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener { private static final String TAG = SmartLocationManager.class.getSimpleName(); private static final int TWO_MINUTES = 1000 * 60 * 2; private static final int PERMISSION_REQUEST_CODE = 1000; private static final int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000; // default value is false but user can change it private String mLastLocationUpdateTime; // fetched location time private String locationProvider; // source of fetched location private Location mLastLocationFetched; // location fetched private Location mLocationFetched; // location fetched private Location networkLocation; private Location gpsLocation; private int mLocationPiority; private long mLocationFetchInterval; private long mFastestLocationFetchInterval; private Context mContext; // application context private Activity mActivity; // activity context private LocationRequest mLocationRequest; private GoogleApiClient mGoogleApiClient; private LocationManagerInterface mLocationManagerInterface; private android.location.LocationManager locationManager; private android.location.LocationListener locationListener; boolean isGPSEnabled; boolean isNetworkEnabled; private int mProviderType; public static final int NETWORK_PROVIDER = 1; public static final int ALL_PROVIDERS = 0; public static final int GPS_PROVIDER = 2; // private final double STANDARD_LOCATION_ACCURACY = 100.0; // private final double STANDARD_LOCATION_SEED_LIMIT = 6.95; public static final int LOCATION_PROVIDER_ALL_RESTICTION = 1; public static final int LOCATION_PROVIDER_RESTRICTION_NONE = 0; public static final int LOCATION_PROVIDER_GPS_ONLY_RESTICTION = 2; public static final int LOCATION_PROVIDER_NETWORK_ONLY_RESTICTION = 3; private int mForceNetworkProviders = 0; public SmartLocationManager(Context context, Activity activity, LocationManagerInterface locationInterface, int providerType, int locationPiority, long locationFetchInterval, long fastestLocationFetchInterval, int forceNetworkProviders) { mContext = context; mActivity = activity; mProviderType = providerType; mLocationPiority = locationPiority; mForceNetworkProviders = forceNetworkProviders; mLocationFetchInterval = locationFetchInterval; mFastestLocationFetchInterval = fastestLocationFetchInterval; mLocationManagerInterface = locationInterface; initSmartLocationManager(); } public void initSmartLocationManager() { // 1) ask for permission for Android 6 above to avoid crash // 2) check if gps is available // 3) get location using awesome strategy askLocationPermission(); // for android version 6 above checkNetworkProviderEnable(mForceNetworkProviders); // if (isGooglePlayServicesAvailable()) // if googleplay services available initLocationObjts(); // init obj for google play service and start fetching location else getLocationUsingAndroidAPI(); // otherwise get location using Android API } private void initLocationObjts() { // Create the LocationRequest object mLocationRequest = LocationRequest.create() .setPriority(mLocationPiority) .setInterval(mLocationFetchInterval) // 10 seconds, in milliseconds .setFastestInterval(mFastestLocationFetchInterval); // 1 second, in milliseconds if (mGoogleApiClient == null) { mGoogleApiClient = new GoogleApiClient.Builder(mActivity) .addConnectionCallbacks(this) .addOnConnectionFailedListener(this) .addApi(LocationServices.API) .build(); } startLocationFetching(); // connect google play services to fetch location } @Override public void onConnected(Bundle connectionHint) { Location location = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient); startLocationUpdates(); if (location == null) { LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this); getLocationUsingAndroidAPI(); } else { setNewLocation(getBetterLocation(location, mLocationFetched), mLocationFetched); } } @Override public void onLocationChanged(Location location) { if (location == null) { getLastKnownLocation(); } else { setNewLocation(getBetterLocation(location, mLocationFetched), mLocationFetched); } } @Override public void onConnectionSuspended(int i) { Log.i(TAG, "Connection suspended"); } @Override public void onConnectionFailed(ConnectionResult connectionResult) { if (connectionResult.hasResolution()) { try { connectionResult.startResolutionForResult(mActivity, CONNECTION_FAILURE_RESOLUTION_REQUEST); // Start an Activity that tries to resolve the error getLocationUsingAndroidAPI(); // try to get location using Android API locationManager } catch (IntentSender.SendIntentException e) { e.printStackTrace(); } } else { Log.i(TAG, "Location services connection failed with code " + connectionResult.getErrorCode()); } } private void setNewLocation(Location location, Location oldLocation) { if (location != null) { mLastLocationFetched = oldLocation; mLocationFetched = location; mLastLocationUpdateTime = DateFormat.getTimeInstance().format(new Date()); locationProvider = location.getProvider(); mLocationManagerInterface.locationFetched(location, mLastLocationFetched, mLastLocationUpdateTime, location.getProvider()); } } private void getLocationUsingAndroidAPI() { // Acquire a reference to the system Location Manager locationManager = (LocationManager) mContext.getSystemService(Context.LOCATION_SERVICE); setLocationListner(); captureLocation(); } public void captureLocation() { if (Build.VERSION.SDK_INT >= 23 && ContextCompat.checkSelfPermission(mContext, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(mContext, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { return; } try { if (mProviderType == SmartLocationManager.GPS_PROVIDER) { locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener); } else if (mProviderType == SmartLocationManager.NETWORK_PROVIDER) { locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener); } else { locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener); locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener); } } catch (Exception e) { Log.e(TAG, e.getMessage()); } } private void setLocationListner() { // Define a listener that responds to location updates locationListener = new android.location.LocationListener() { public void onLocationChanged(Location location) { // Called when a new location is found by the network location provider. if (location == null) { getLastKnownLocation(); } else { setNewLocation(getBetterLocation(location, mLocationFetched), mLocationFetched); // if (isLocationAccurate(location) && location.getAccuracy() < STANDARD_LOCATION_ACCURACY && location.getSpeed() < STANDARD_LOCATION_SEED_LIMIT) {// no use of this if // setNewLocation(getBetterLocation(location, mLocationFetched), mLocationFetched); // } else { // setNewLocation(getBetterLocation(location, mLocationFetched), mLocationFetched); // } } } public void onStatusChanged(String provider, int status, Bundle extras) { } public void onProviderEnabled(String provider) { } public void onProviderDisabled(String provider) { } }; } public Location getAccurateLocation() { if (Build.VERSION.SDK_INT >= 23 && ContextCompat.checkSelfPermission(mContext, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(mContext, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { return null; } try { gpsLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); networkLocation = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER); Location newLocalGPS, newLocalNetwork; if (gpsLocation != null || networkLocation != null) { newLocalGPS = getBetterLocation(mLocationFetched, gpsLocation); newLocalNetwork = getBetterLocation(mLocationFetched, networkLocation); setNewLocation(getBetterLocation(newLocalGPS, newLocalNetwork), mLocationFetched); } } catch (Exception ex) { Log.e(TAG, ex.getMessage()); } return mLocationFetched; } protected void startLocationUpdates() { LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this); } public void startLocationFetching() { mGoogleApiClient.connect(); if (mGoogleApiClient.isConnected()) { startLocationUpdates(); } } public void pauseLocationFetching() { if (mGoogleApiClient.isConnected()) { LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this); mGoogleApiClient.disconnect(); } } public void abortLocationFetching() { mGoogleApiClient.disconnect(); // Remove the listener you previously added if (locationManager != null && locationListener != null) { if (Build.VERSION.SDK_INT >= 23 && ContextCompat.checkSelfPermission(mContext, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(mContext, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { return; } try { locationManager.removeUpdates(locationListener); locationManager = null; } catch (Exception ex) { Log.e(TAG, ex.getMessage()); } } } public void resetLocation() { mLocationFetched = null; mLastLocationFetched = null; networkLocation = null; gpsLocation = null; } // Android M Permission check public void askLocationPermission() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { if (ContextCompat.checkSelfPermission(mActivity, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(mActivity, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED ) { if (ActivityCompat.shouldShowRequestPermissionRationale(mActivity, Manifest.permission.ACCESS_COARSE_LOCATION) || ActivityCompat.shouldShowRequestPermissionRationale(mActivity, Manifest.permission.ACCESS_FINE_LOCATION)) { final AlertDialog.Builder builder = new AlertDialog.Builder(mActivity); builder.setMessage("Please allow all permissions in App Settings for additional functionality.") .setCancelable(false) .setPositiveButton("Allow", new DialogInterface.OnClickListener() { public void onClick(@SuppressWarnings("unused") final DialogInterface dialog, @SuppressWarnings("unused") final int id) { Toast.makeText(mContext, "Welcome", Toast.LENGTH_SHORT).show(); } }) .setNegativeButton("Deny", new DialogInterface.OnClickListener() { public void onClick(final DialogInterface dialog, @SuppressWarnings("unused") final int id) { mActivity.finish(); } }); final AlertDialog alert = builder.create(); alert.show(); } else ActivityCompat.requestPermissions(mActivity, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION , Manifest.permission.ACCESS_FINE_LOCATION }, PERMISSION_REQUEST_CODE); } } } public void checkNetworkProviderEnable(int enforceActive) { locationManager = (LocationManager) mContext.getSystemService(Context.LOCATION_SERVICE); isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER); if (!isGPSEnabled && !isNetworkEnabled) { buildAlertMessageTurnOnLocationProviders("Your location providers seems to be disabled, please enable it", "OK", "Cancel"); } else if (!isGPSEnabled && mForceNetworkProviders == LOCATION_PROVIDER_GPS_ONLY_RESTICTION) { buildAlertMessageTurnOnLocationProviders("Your GPS seems to be disabled, please enable it", "OK", "Cancel"); } else if (!isNetworkEnabled && mForceNetworkProviders == LOCATION_PROVIDER_NETWORK_ONLY_RESTICTION) { buildAlertMessageTurnOnLocationProviders("Your Network location provider seems to be disabled, please enable it", "OK", "Cancel"); } // getting network status if (!isGPSEnabled && !isNetworkEnabled) { Toast.makeText(mContext, "Location can't be fetched!", Toast.LENGTH_SHORT).show(); // show alert mActivity.finish(); } } private void buildAlertMessageTurnOnLocationProviders(String message, String positiveButtonText, String negativeButtonText) { final AlertDialog.Builder builder = new AlertDialog.Builder(mActivity); builder.setMessage(message) .setCancelable(false) .setPositiveButton(positiveButtonText, new DialogInterface.OnClickListener() { public void onClick(@SuppressWarnings("unused") final DialogInterface dialog, @SuppressWarnings("unused") final int id) { Intent mIntent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS); mIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); mContext.startActivity(mIntent); } }) .setNegativeButton(negativeButtonText, new DialogInterface.OnClickListener() { public void onClick(final DialogInterface dialog, @SuppressWarnings("unused") final int id) { mActivity.finish(); } }); final AlertDialog alert = builder.create(); alert.show(); } public Location getLastKnownLocation() { locationProvider = LocationManager.NETWORK_PROVIDER; Location lastKnownLocation = null; // Or use LocationManager.GPS_PROVIDER if (Build.VERSION.SDK_INT >= 23 && ContextCompat.checkSelfPermission(mContext, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(mContext, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { return lastKnownLocation; } try { lastKnownLocation = locationManager.getLastKnownLocation(locationProvider); return lastKnownLocation; } catch (Exception e) { Log.e(TAG, e.getMessage()); } return lastKnownLocation; } public boolean isGooglePlayServicesAvailable() { int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(mContext); if (status == ConnectionResult.SUCCESS) { return true; } else { return false; } } /** * Determines whether one Location reading is better than the current Location fix * * @param location The new Location that you want to evaluate * @param currentBestLocation The current Location fix, to which you want to compare the new one */ protected Location getBetterLocation(Location location, Location currentBestLocation) { if (currentBestLocation == null) { // A new location is always better than no location return location; } // Check whether the new location fix is newer or older long timeDelta = location.getTime() - currentBestLocation.getTime(); boolean isSignificantlyNewer = timeDelta > TWO_MINUTES; boolean isSignificantlyOlder = timeDelta < -TWO_MINUTES; boolean isNewer = timeDelta > 0; // If it's been more than two minutes since the current location, use the new location // because the user has likely moved if (isSignificantlyNewer) { return location; // If the new location is more than two minutes older, it must be worse } else if (isSignificantlyOlder) { return currentBestLocation; } // Check whether the new location fix is more or less accurate int accuracyDelta = (int) (location.getAccuracy() - currentBestLocation.getAccuracy()); boolean isLessAccurate = accuracyDelta > 0; boolean isMoreAccurate = accuracyDelta < 0; boolean isSignificantlyLessAccurate = accuracyDelta > 200; // Check if the old and new location are from the same provider boolean isFromSameProvider = isSameProvider(location.getProvider(), currentBestLocation.getProvider()); // Determine location quality using a combination of timeliness and accuracy if (isMoreAccurate) { return location; } else if (isNewer && !isLessAccurate) { return location; } else if (isNewer && !isSignificantlyLessAccurate && isFromSameProvider) { return location; } return currentBestLocation; } /** * Checks whether two providers are the same */ private boolean isSameProvider(String provider1, String provider2) { if (provider1 == null) { return provider2 == null; } return provider1.equals(provider2); } public boolean isLocationAccurate(Location location) { if (location.hasAccuracy()) { return true; } else { return false; } } public Location getStaleLocation() { if (mLastLocationFetched != null) { return mLastLocationFetched; } if (Build.VERSION.SDK_INT >= 23 && ContextCompat.checkSelfPermission(mContext, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(mContext, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { return null; } if (mProviderType == SmartLocationManager.GPS_PROVIDER) { return locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); } else if (mProviderType == SmartLocationManager.NETWORK_PROVIDER) { return locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER); } else { return getBetterLocation(locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER), locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER)); } } }
we can use it with activity or a fragment, here i am using it with activity
import android.location.Location; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.widget.TextView; import android.widget.Toast; import com.example.raza.locationaware.location.LocationManagerInterface; import com.example.raza.locationaware.location.SmartLocationManager; import com.google.android.gms.location.LocationRequest; public class LocationActivity extends AppCompatActivity implements LocationManagerInterface { public static final String TAG = LocationActivity.class.getSimpleName(); SmartLocationManager mLocationManager; TextView mLocalTV, mLocationProviderTV, mlocationTimeTV; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_location); mLocationManager = new SmartLocationManager(getApplicationContext(), this, this, SmartLocationManager.ALL_PROVIDERS, LocationRequest.PRIORITY_HIGH_ACCURACY, 10 * 1000, 1 * 1000, SmartLocationManager.LOCATION_PROVIDER_RESTRICTION_NONE); // init location manager mLocalTV = (TextView) findViewById(R.id.locationDisplayTV); mLocationProviderTV = (TextView) findViewById(R.id.locationProviderTV); mlocationTimeTV = (TextView) findViewById(R.id.locationTimeFetchedTV); } protected void onStart() { super.onStart(); mLocationManager.startLocationFetching(); } protected void onStop() { super.onStop(); mLocationManager.abortLocationFetching(); } @Override protected void onPause() { super.onPause(); mLocationManager.pauseLocationFetching(); } @Override public void locationFetched(Location mLocal, Location oldLocation, String time, String locationProvider) { Toast.makeText(getApplication(), "Lat : " + mLocal.getLatitude() + " Lng : " + mLocal.getLongitude(), Toast.LENGTH_LONG).show(); mLocalTV.setText("Lat : " + mLocal.getLatitude() + " Lng : " + mLocal.getLongitude()); mLocationProviderTV.setText(locationProvider); mlocationTimeTV.setText(time); } }
Hope it helps, if you can suggest any improvement kindly post it on git . 谢谢。
I have published a small library that can make it easy to get location data in Android, it even takes care of Android M runtime permissions.
You might check it out here: https://github.com/julioromano/RxLocation and use it or its source code as examples for your implementation.
Simple Find Write Code in On Location Method
public void onLocationChanged(Location location) { if (mCurrLocationMarker != null) { mCurrLocationMarker.remove(); } //Place current location marker LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude()); MarkerOptions markerOptions = new MarkerOptions(); markerOptions.position(latLng); markerOptions.title("Current Position"); markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)); mCurrLocationMarker = mMap.addMarker(markerOptions); //move map camera mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng)); mMap.animateCamera(CameraUpdateFactory.zoomTo(18)); PolylineOptions pOptions = new PolylineOptions() .width(5) .color(Color.GREEN) .geodesic(true); for (int z = 0; z < routePoints.size(); z++) { LatLng point = routePoints.get(z); pOptions.add(point); } line = mMap.addPolyline(pOptions); routePoints.add(latLng); }
GoogleSamples has verbose example using latest FusedLocationProviderApi. Unfortunately the most upvoted answers are out of date.
Follow the below examples to implement Location Services using FusedLocationProviderApi
https://github.com/googlesamples/android-play-location/tree/master/LocationUpdates
