位置更新使用Google Play服务和FusedLocationProviderClient

Question

我想使用最新的融合位置提供商客户端在"后台服务"上获取位置更新.我不想使用所有正在使用的位置监听器和Google API客户端.我还需要使用谷歌播放服务提供的位置设置Api来检查位置设置是否禁用或启用"后台服务".请帮助.

Answer 1

您可以扩展服务类别，例如

public class BackgroundLocationService extends Service implements
GooglePlayServicesClient.ConnectionCallbacks,
GooglePlayServicesClient.OnConnectionFailedListener,
LocationListener

您可以在此处查看完整的源代码BackgroundLocationService.java

用于启用位置设置

   private void displayLocationSettingsRequest() {
    GoogleApiClient googleApiClient = new GoogleApiClient.Builder(context)
            .addApi(LocationServices.API).build();
    googleApiClient.connect();

    LocationRequest locationRequest = LocationRequest.create();
    locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    locationRequest.setInterval(10000);
    locationRequest.setFastestInterval(10000 / 2);

    LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder().addLocationRequest(locationRequest);
    builder.setAlwaysShow(true);

    PendingResult<LocationSettingsResult> result = LocationServices.SettingsApi.checkLocationSettings(googleApiClient, builder.build());
    result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
        @Override
        public void onResult(@NonNull LocationSettingsResult result) {
            final Status status = result.getStatus();
            switch (status.getStatusCode()) {
                case LocationSettingsStatusCodes.SUCCESS:
                    break;
                case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:

                    try {
                        // Show the dialog by calling startResolutionForResult(), and check the result
                        // in onActivityResult().
                        status.startResolutionForResult(context, REQUEST_CHECK_SETTINGS);
                    } catch (IntentSender.SendIntentException ignored) {
                    }
                    break;
                case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
                    break;
            }
        }
    });
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    switch (requestCode) {
   // Check for the integer request code originally supplied to 
    startResolutionForResult().
        case REQUEST_CHECK_SETTINGS:
            switch (resultCode) {
                case Activity.RESULT_OK:
                    //startLocationUpdates();
                    break;
                case Activity.RESULT_CANCELED:
                    displayLocationSettingsRequest();//keep asking
                    showToast("Location permission needed");
                    break;
            }
            break;
    }
}

您可以从服务中检查位置设置，如果位置已关闭，

LocationManager lm = (LocationManager)context.getSystemService(Context.LOCATION_SERVICE);
  boolean gps_enabled = false;
      boolean network_enabled = false;

   try {
gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
 } catch(Exception ex) {}

   try {
network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
  } catch(Exception ex) {}

   if(!gps_enabled && !network_enabled) {
// notify user
 // Either you can display a Notification(Recommended way) or you can show dialog with 

dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
//It needs SYSTEM_ALERT_WINDOW permission. Add this permission in Manifest.

   <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>     

 }