Get current location inside a fragment

Question

I need to get the current location of the user and store its values in separate longitude and latitude variables. Right now in the following code I have set them statically.

Here is my Location Fragment (all my fragments are displayed inside an Activity using viewpager):

package com.example.atry.MakeComplaint

import Retrofit.INodeJS
import Retrofit.Observables
import Retrofit.RetrofitClient
import android.app.Activity
import android.content.ContentValues.TAG
import android.content.Context
import android.content.Context.*
import android.content.Intent
import android.content.IntentSender
import android.content.pm.PackageManager
import android.location.*
import android.net.Uri
import android.os.Bundle
import android.util.Log
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import com.google.android.gms.maps.MapView

import android.widget.LinearLayout
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
import com.example.atry.R
import com.google.android.gms.common.GooglePlayServicesNotAvailableException
import com.google.android.gms.common.api.ResolvableApiException
import com.google.android.gms.dynamic.SupportFragmentWrapper
import com.google.android.gms.location.*
import com.google.android.gms.maps.*
import com.google.android.gms.maps.model.*
import io.reactivex.disposables.CompositeDisposable
import kotlinx.android.synthetic.main.fragment_complaint_details.view.*
import kotlinx.android.synthetic.main.fragment_location.*
import kotlinx.android.synthetic.main.fragment_location.view.*
import retrofit2.Call
import retrofit2.Response
import java.io.IOException
import java.util.Observer
import java.util.Optional.empty
import javax.security.auth.callback.Callback


class LocationFragment : Fragment(), OnMapReadyCallback, GoogleMap.OnMarkerClickListener {

    override fun onMarkerClick(p0: Marker?)= false

    private lateinit var map: GoogleMap
    private lateinit var mapView : MapView
//    lateinit var typeName: String
    lateinit var myAPI: INodeJS
    var MyCategory: Observables.ComplaintType?=null


    private var listener: OnLocationFragmentInteractionListener? = null


    var objectComplaint =
        Observables.Complaint(
        1 , "dummy problem" ,
        "url" ,
        Observables.Location("78.4","17.4"),
        Observables.ComplaintType("Smell", "null"),
        Observables.Status(2 , "Unresolved")

    )






    //for updating user's location/ for current location

    private lateinit var fusedLocationClient: FusedLocationProviderClient
    private lateinit var lastLocation: Location
    private lateinit var locationCallback: LocationCallback
    private lateinit var locationRequest: LocationRequest
    private var locationUpdateState = false

    companion object {
        private const val LOCATION_PERMISSION_REQUEST_CODE = 1

        private const val REQUEST_CHECK_SETTINGS = 2  //For updating user's location as they move

    }







    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        val permissions = arrayOf(android.Manifest.permission.ACCESS_FINE_LOCATION, android.Manifest.permission.ACCESS_COARSE_LOCATION)
        requestPermissions( permissions,0)
        arguments?.let {

        }

        //INIT API

        val retrofit = RetrofitClient.instanc
        myAPI = retrofit.create(INodeJS::class.java)

        //static way of bringing category names

//        if(arguments!!.getString("typeName") !=null){
//
//            typeName =arguments!!.getString("typeName")
//            Log.d("got it!!",typeName)
//
//        }




    }


    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate the layout for this fragment
        val v = inflater.inflate(com.example.atry.R.layout.fragment_location, container, false)
        mapView = v.findViewById(R.id.maps)
        mapView.onCreate(savedInstanceState)
        mapView.onResume()




       try {
        MapsInitializer.initialize(getActivity()!!.getApplicationContext());
    } catch (sendEx: IntentSender.SendIntentException) {
        sendEx.printStackTrace();
    }

        mapView.getMapAsync(this)




        v.backToList.setOnClickListener {
            backFragment()

        }

        v.forwardToDescription.setOnClickListener{
            getAllData()


        }

        return v
    }

    override public fun onResume() {
    super.onResume();
    mapView.onResume();
}

override public fun onPause() {
    super.onPause();
    mapView.onPause();
}

override public fun onDestroy() {
    super.onDestroy();
    mapView.onDestroy();
}

override public fun onLowMemory() {
    super.onLowMemory();
    mapView.onLowMemory()
}

    override fun onMapReady(googleMap: GoogleMap?) {
        map = googleMap!!
        map.uiSettings?.isZoomControlsEnabled = true
        map.isMyLocationEnabled = true
//        var criteria = Criteria()
//        var locationManager = context!!.getSystemService(LOCATION_SERVICE) as LocationManager
//        var provider = locationManager.getBestProvider(criteria, true)
//        var location = locationManager.getLastKnownLocation(provider)
//        var latitude = location.latitude
//        var longitude = location.longitude




//         latitude and longitude
        val latitude = 17.385044
        val longitude = 78.486671

        val marker = MarkerOptions().position(LatLng(latitude,longitude)).title("hello maps")

        marker.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED))

        map.addMarker(marker)

        val cameraPosition = CameraPosition.builder().target(LatLng(latitude,longitude)).zoom(12f).build()
        map.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition))


    }

    private fun backFragment() {
        val manager = (context as AppCompatActivity).supportFragmentManager
        manager.popBackStackImmediate()
    }


    fun sendCategoryItem(category: Observables.ComplaintType) {


        this.MyCategory = category
        Log.d("here", "i am here 1")
        Log.d("here", MyCategory.toString())


    }


    fun getAllData(){

        val latitude = 17.4
        val longitude = 78.4

//        LocationUtils().getInstance(appContext)
//        LocationUtils().getLocation().observe(this, Observer {loc: Location? ->
//            location = loc!!
//            // Yay! location recived. Do location related work here
//            Log.i(TAG,"Location: ${location.latitude}  ${location.longitude}")
//
//        })

        var typename = MyCategory!!.typeName.toString()


        val call = myAPI.checkExistingComplain(typename,longitude.toString(), latitude.toString() )
        Log.d("T", typename)
        Log.d("Lo", longitude.toString())
        Log.d("La", latitude.toString())




        call.enqueue(object : retrofit2.Callback<Observables.checkExistingResult> {
            override fun onFailure(call: Call<Observables.checkExistingResult>?, t: Throwable?) {

                Log.d("NO", t!!.message)


            }

            override fun onResponse(call: Call<Observables.checkExistingResult>?, response: Response<Observables.checkExistingResult>?) {

                if(response?.body()?.Complain ==null) {

                    setExistingData(response!!.body()!!.Complain)
                    descriptionFragment()
//                    notifyDataSetChanged()

                }

                else if(response!!.code() == 200){



                    Log.d("YES", "200")
                    Log.d("response", response.body().toString())


                    objectComplaint = response.body()!!.Complain

                    Log.d("got the complaint",objectComplaint.toString())
                    setExistingData(objectComplaint)



                    existPopup()
                }

                else if(response!!.code() == 201){

                    Log.d("response", response.body().toString())

//                    alreadyMadeComplaintPopup()
                }

                else{
                    descriptionFragment()
                }

                val item = objectComplaint

                listener?.onLocationFragmentInteraction(item)

            }
        })
    }


    interface OnLocationFragmentInteractionListener {
        // TODO: Update argument type and name
        fun onLocationFragmentInteraction(item: Observables.Complaint?)
    }

    override fun onAttach(context: Context) {
        super.onAttach(context)
        if (context is OnLocationFragmentInteractionListener) {
            listener = context as OnLocationFragmentInteractionListener
        } else {
            throw RuntimeException("$context must implement OnLocationFragmentInteractionListener")
        }
    }

    fun setExistingData(test: Observables.Complaint) {
        objectComplaint = test
    }

    //opening up the checkExisting popup

    private fun existPopup(){
        val fm = activity!!.supportFragmentManager
        val dialog = PopupDialog() // creating new object
        dialog.show(fm, "dialog")
    }



    private fun descriptionFragment() {
        val dFragment= Category_Description()
        val lFragment = LocationFragment()
        val manager = (context as AppCompatActivity).supportFragmentManager
        val transaction =  manager.beginTransaction()
        transaction.replace(
            R.id.location_screen,
            dFragment
        ) // give your fragment container id in first parameter
        transaction.show(dFragment)
        transaction.hide(lFragment)
        transaction.isAddToBackStackAllowed
        transaction.addToBackStack(lFragment.fragmentManager.toString())  // if written, this transaction will be added to backstack
        transaction.commit()
    }



}

What can I try next?

Answer 1

Here look at this example: GpsUtils

Its pretty self explanatory. Just call GpsUtils.getInstance().findDeviceLocation(activity) from your fragment and after that accessing the static latitude and longitude variables in the GpsUtils class should give you the current locations. Note: Theres scope for improvement regarding the design of this class but it does the job pretty fine.