我正在尝试使用GoogleApiClient获取用户的位置，如果在活动开始时启用GPS，它可以正常工作，但是，如果未启用GPS并且我要求用户启用GPS，我似乎无法获得该位置。我正在尝试使用LocationListener，我已经尝试了本机和GooglePlayServices侦听器。这是我的代码：
检查onCreate中是否启用了GPS：
<Button MouseDown="Button_MouseDown" >Click me</Button>
如果结果是RESOLUTION REQUIRED，我运行onResult方法，如果用户接受启用GPS，我会开始侦听位置：
private void Button_MouseDown(object sender, MouseButtonEventArgs e)
{
if(e.ChangedButton == MouseButton.Right)
{
}
e.Handled = true;
}
行Log.d（＆＃34; locationmanager＆＃34;，＆＃34;位置结果ok＆＃34;）;执行，但上面的行似乎没有执行。
最后，这是我的听众：
//Ask the user to enable GPS if it is not.
mLocationRequestBalancedPowerAccuracy = new LocationRequest()
.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY)
.setInterval(3600000)
.setFastestInterval(300000);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(mLocationRequestBalancedPowerAccuracy);
PendingResult<LocationSettingsResult> result =
LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient, builder.build());
result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
@Override
public void onResult(@NonNull LocationSettingsResult result) {
final Status status = result.getStatus();
//final LocationSettingsStates states = result.getLocationSettingsStates();
switch (status.getStatusCode()) {
case LocationSettingsStatusCodes.SUCCESS:
break;
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
try {
status.startResolutionForResult(
MainActivity.this,
REQUEST_CHECK_SETTINGS);
} catch (IntentSender.SendIntentException e) {
Log.d("Location error", e.toString());
}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
break;
}
}
});
答案 0 :(得分：0)
尝试使用此位置侦听器类：
/**
* Getting Navigation Updates.
* <p>
* Demonstrates how to use the Fused Navigation Provider API to get updates about a device's
* location. The Fused Navigation Provider is part of the Google Play services location APIs.
* <p>
*
* Author Mayank
*/
public class GPSLocationListener implements ConnectionCallbacks, OnConnectionFailedListener, LocationListener {
protected static final String TAG = "location-updates-sample";
/**
* The desired interval for location updates. Inexact. Updates may be more or less frequent.
*/
public static final long UPDATE_INTERVAL_IN_MILLISECONDS = 10000;
/**
* The fastest rate for active location updates. Exact. Updates will never be more frequent
* than this value.
*/
public static final long FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS =
UPDATE_INTERVAL_IN_MILLISECONDS / 2;
/**
* Provides the entry point to Google Play services.
*/
protected GoogleApiClient mGoogleApiClient;
/**
* Stores parameters for requests to the FusedLocationProviderApi.
*/
protected LocationRequest mLocationRequest;
/**
* Represents a geographical location.
*/
protected Location mCurrentLocation;
private Activity mActivity;
public GPSLocationListener(Activity activity) {
this.mActivity = activity;
// Kick off the process of building a GoogleApiClient and requesting the LocationServices API.
buildGoogleApiClient();
}
/**
* Builds a GoogleApiClient. Uses the {@code #addApi} method to request the
* LocationServices API.
*/
protected synchronized void buildGoogleApiClient() {
Log.i(TAG, "Building GoogleApiClient");
mGoogleApiClient = new GoogleApiClient.Builder(mActivity)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
createLocationRequest();
}
/**
* Sets up the location request. Android has two location request settings:
* {@code ACCESS_COARSE_LOCATION} and {@code ACCESS_FINE_LOCATION}. These settings control
* the accuracy of the current location. This sample uses ACCESS_FINE_LOCATION, as defined in
* the AndroidManifest.xml.
* <p/>
* When the ACCESS_FINE_LOCATION setting is specified, combined with a fast update
* interval (5 seconds), the Fused Navigation Provider API returns location updates that are
* accurate to within a few feet.
* <p/>
* These settings are appropriate for mapping applications that show real-time location
* updates.
*/
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
// Sets the desired interval for active location updates. This interval is
// inexact. You may not receive updates at all if no location sources are available, or
// you may receive them slower than requested. You may also receive updates faster than
// requested if other applications are requesting location at a faster interval.
mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);
// Sets the fastest rate for active location updates. This interval is exact, and your
// application will never receive updates faster than this value.
mLocationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
/**
* Requests location updates from the FusedLocationApi.
*/
protected void startLocationUpdates() {
// The final argument to {@code requestLocationUpdates()} is a LocationListener
// (http://developer.android.com/reference/com/google/android/gms/location/LocationListener.html).
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
/**
* Removes location updates from the FusedLocationApi.
*/
protected void stopLocationUpdates() {
// It is a good practice to remove location requests when the activity is in a paused or
// stopped state. Doing so helps battery performance and is especially
// recommended in applications that request frequent location updates.
// The final argument to {@code requestLocationUpdates()} is a LocationListener
// (http://developer.android.com/reference/com/google/android/gms/location/LocationListener.html).
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
public void onStart() {
mGoogleApiClient.connect();
// Within {@code onPause()}, we pause location updates, but leave the
// connection to GoogleApiClient intact. Here, we resume receiving
// location updates if the user has requested them.
}
public void onStop() {
// Stop location updates to save battery, but don't disconnect the GoogleApiClient object.
if (mGoogleApiClient.isConnected()) {
stopLocationUpdates();
mGoogleApiClient.disconnect();
}
}
/**
* Runs when a GoogleApiClient object successfully connects.
*/
@Override
public void onConnected(Bundle connectionHint) {
Log.i(TAG, "Connected to GoogleApiClient");
// If the initial location was never previously requested, we use
// FusedLocationApi.getLastLocation() to get it. If it was previously requested, we store
// its value in the Bundle and check for it in onCreate().
if (mCurrentLocation == null) {
mCurrentLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
locationReceived();
}
// start location updates.
startLocationUpdates();
}
/**
* Callback that fires when the location changes.
*/
@Override
public void onLocationChanged(Location location) {
mCurrentLocation = location;
}
@Override
public void onConnectionSuspended(int cause) {
// The connection to Google Play services was lost for some reason. We call connect() to
// attempt to re-establish the connection.
Log.i(TAG, "Connection suspended");
mGoogleApiClient.connect();
}
@Override
public void onConnectionFailed(ConnectionResult result) {
// Refer to the javadoc for ConnectionResult to see what error codes might be returned in
// onConnectionFailed.
Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = " + result.getErrorCode());
}
public GoogleApiClient getGoogleApiClient(){
return mGoogleApiClient;
}
}
在您的活动中：
//provides gps location updates
private GPSLocationListener gpsLocationListener;
@Override
public void onStart() {
super.onStart();
//call to location listener to start location updates when activity gets started
if (gpsLocationListener != null) {
gpsLocationListener.onStart();
}
}
@Override
public void onStop() {
super.onStop();
//call to stop location updates when activity gets stopped
if (gpsLocationListener != null) {
gpsLocationListener.onStop();
}
}
@Override
public void onCreate() {
super.onCreate();
//call to initialize gpsLocationLister instance
gpsLocationListener = new GPSLocationListener((MainActivity) mainView);
}
希望这会对你有所帮助。