Android 如何在使用融合定位API关闭gps的情况下获取位置更新?
这个问题可能会被问很多次,但我找不到任何解决办法。 我需要在后台获取用户的位置15分钟 当GPS打开时,它可以正常工作,但当GPS关闭时,应用程序不会获得位置更新。我需要它来获取至少网络位置或wifi位置 如何使用融合位置API实现这一点 位置管理器具有此功能,但处于融合位置。因为谷歌建议开发者使用PlayServicesAPI中的位置,所以我不想使用位置管理器。 我如何才能做到这一点,让我发布我迄今为止的尝试:Android 如何在使用融合定位API关闭gps的情况下获取位置更新?,android,gps,google-play-services,fusedlocationproviderapi,Android,Gps,Google Play Services,Fusedlocationproviderapi,这个问题可能会被问很多次,但我找不到任何解决办法。 我需要在后台获取用户的位置15分钟 当GPS打开时,它可以正常工作,但当GPS关闭时,应用程序不会获得位置更新。我需要它来获取至少网络位置或wifi位置 如何使用融合位置API实现这一点 位置管理器具有此功能,但处于融合位置。因为谷歌建议开发者使用PlayServicesAPI中的位置,所以我不想使用位置管理器。 我如何才能做到这一点,让我发布我迄今为止的尝试: import android.content.Context; import an
import android.content.Context;
import android.location.Location;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.util.Log;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
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;
/**
* Created by 4264 on 14-10-2016.
*/
public class Locationlistener implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener,LocationListener {
private Location mlocation; // location
private double latitude; // latitude
private double longitude; // longitude
private GoogleApiClient mGAC;
private Context mContext;
public static final String TAG = "GPSresource";
private FusedLocationProviderApi fusedLocationProviderApi;
private LocationRequest locationRequest;
public Locationlistener(Context c)
{
mContext = c;
try {
buildGoogleApiClient();
mGAC.connect();
}
catch(Exception e)
{
Log.d(TAG,e.toString());
}
}
protected synchronized void buildGoogleApiClient() {
locationRequest = LocationRequest.create();
locationRequest.setPriority(LocationRequest.PRIORITY_LOW_POWER);
locationRequest.setInterval(1);
locationRequest.setFastestInterval(1);
mGAC = new GoogleApiClient.Builder(mContext)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
public double getLatitude(){
if(mlocation != null){
latitude = mlocation.getLatitude();
}
// return latitude
return latitude;
}
/**
* Function to get longitude
* */
public double getLongitude() {
if (mlocation != null) {
longitude = mlocation.getLongitude();
}
// return longitude
return longitude;
}
public Location GetLocationBlocking() throws InterruptedException {
// String lat=String.valueOf(moCurrentLocation.getLatitude());
// String longt=String.valueOf(moCurrentLocation.getLongitude());
// Toast.makeText(oContext,"Lat"+lat+"long"+longt,Toast.LENGTH_SHORT).show();
return mlocation;
}
@Override
public void onConnected(Bundle bundle) {
Location oLocation = LocationServices.FusedLocationApi.getLastLocation(mGAC);
if (mGAC != null) {
mlocation = oLocation;
getLatitude();
getLongitude();
if (oLocation != null){
Log.d("lat",String.valueOf(mlocation.getLatitude()));
Log.d("long",String.valueOf(mlocation.getLongitude()));
}
else{
LocationServices.FusedLocationApi.requestLocationUpdates(mGAC, locationRequest, this);
} }}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
@Override
public void onLocationChanged(Location location) {
mlocation=location;
}
}
我不明白你说你不想使用位置管理器和GPS…看看这个。。。基于此文档,我们有3种访问位置的策略:
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
private long UPDATE_INTERVAL = 10 * 1000; /* 10 secs */
private long FASTEST_INTERVAL = 2000; /* 2 sec */
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Create the location client to start receiving updates
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this).build();
}
protected void onStart() {
super.onStart();
// Connect the client.
mGoogleApiClient.connect();
}
protected void onStop() {
// Disconnecting the client invalidates it.
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
// only stop if it's connected, otherwise we crash
if (mGoogleApiClient != null) {
mGoogleApiClient.disconnect();
}
super.onStop();
}
public void onConnected(Bundle dataBundle) {
// Get last known recent location.
Location mCurrentLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
// Note that this can be NULL if last location isn't already known.
if (mCurrentLocation != null) {
// Print current location if not null
Log.d("DEBUG", "current location: " + mCurrentLocation.toString());
LatLng latLng = new LatLng(mCurrentLocation.getLatitude(), mCurrentLocation.getLongitude());
}
// Begin polling for new location updates.
startLocationUpdates();
}
@Override
public void onConnectionSuspended(int i) {
if (i == CAUSE_SERVICE_DISCONNECTED) {
Toast.makeText(this, "Disconnected. Please re-connect.", Toast.LENGTH_SHORT).show();
} else if (i == CAUSE_NETWORK_LOST) {
Toast.makeText(this, "Network lost. Please re-connect.", Toast.LENGTH_SHORT).show();
}
}
// Trigger new location updates at interval
protected void startLocationUpdates() {
// Create the location request
mLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setInterval(UPDATE_INTERVAL)
.setFastestInterval(FASTEST_INTERVAL);
// Request location updates
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,
mLocationRequest, this);
}
然后使用onLocationChanged
注册位置更新:
public void onLocationChanged(Location location) {
// New location has now been determined
String msg = "Updated Location: " +
Double.toString(location.getLatitude()) + "," +
Double.toString(location.getLongitude());
Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
// You can now create a LatLng Object for use with maps
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
}
有关融合位置API的更多信息,请参阅
故障排除位置更新
应始终使用GoogleAppClient
利用LocationServices.API
完成位置更新,如上所示。不要使用可靠性低得多的旧位置API。即使使用正确的FusedLocationApi
,也会出现很多问题。考虑以下潜在问题:
- 您是否添加了必要的权限?请确保您的应用程序具有
和互联网
权限,以确保 如上述指南所示,可以访问该位置访问位置
- 您在呼叫时是否得到空值
?这是正常现象 因为此方法仅在已经存在位置时返回 最近由另一个应用程序检索。如果返回null,则 意味着您需要开始使用接收位置更新LocationServices.FusedLocationApi.getLastLocation
之前 接收如上所示的位置LocationServices.FusedLocationApi.RequestLocationUpdate
- 您是否正在尝试获取genymotion emulator上的位置?确保 您已启用GPS并正确配置lat/lng。尝试重新启动 模拟器(如果需要)并重新启用GPS或尝试设备(或 而不是排除genymotion特定的问题