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I am using the Google Places API to get an autocomplete support fragment to get a search bar with location suggestions. I followed the tutorial given here Places Autocomplete

This is the XML code 

<fragment android:id="@+id/autoCompleteFragment" android:layout_width="match_parent" android:layout_height="match_parent" android:name="com.google.android.libraries.places.widget.AutocompleteSupportFragment" />

and this is the Java code

// Initialize the AutocompleteSupportFragment. AutocompleteSupportFragment autocompleteFragment = (AutocompleteSupportFragment) getActivity().getSupportFragmentManager().findFragmentById(R.id.autoCompleteFragment); // Specify the types of place data to return. autocompleteFragment.setPlaceFields(Arrays.asList(Place.Field.ID, Place.Field.NAME)); // Set up a PlaceSelectionListener to handle the response. autocompleteFragment.setOnPlaceSelectedListener(new PlaceSelectionListener() { @Override public void onPlaceSelected(Place place) { // TODO: Get info about the selected place. Log.i(TAG, "Place: " + place.getName() + ", " + place.getId()); } @Override public void onError(Status status) { // TODO: Handle the error. Log.i(TAG, "An error occurred: " + status); } });

The null pointer exception comes on this line 

autocompleteFragment.setPlaceFields(Arrays.asList(Place.Field.ID, Place.Field.NAME));

Which says that setPlaceFields cannot be called on a null reference.

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3 Answers 3

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16

First of all, you have to initialize Places (reference here):

// Add an import statement for the client library. import com.google.android.libraries.places.api.Places; // Initialize Places. Places.initialize(getApplicationContext(), apiKey);

If you want to use the AutocompleteSupportFragment inside an Activity, you can get it in this way:

AutocompleteSupportFragment autocompleteFragment = (AutocompleteSupportFragment) getSupportFragmentManager().findFragmentById(R.id.autoCompleteFragment);

If you want to use the AutocompleteSupportFragment inside a Fragment, you can get it in this way:

AutocompleteSupportFragment autocompleteFragment = (AutocompleteSupportFragment) getChildFragmentManager().findFragmentById(R.id.autoCompleteFragment);
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3 Comments

I am not getting a null pointer exception anymore but now if I click on the autocomplete support fragment and then click somewhere else on the screen, I am unable to click on the autocomplete support fragment and the logcat shows this error Autocomplete activity cannot be launched until fragment is enabled.
I fixed this error as well by calling super.onActivityResult(requestCode, resultCode, data);
clicking on map twice creates an error: Binary XML file line #1: Duplicate id 0x7f080043, tag null, or parent id 0x1020002 with another fragment for com.google.android.libraries.places.widget.AutocompleteSupportFragment
2

I was struggling with AutoCompleteSupportFragment. Whenever I was tapping on the search fragment and started typing, the keyboard just went down without any error in logcat. After a lot of struggle i was finally able to understand the problem. If anyone else is also facing such issue, he/she can try.

places api, direction api and many other gmaps APIs need US$ billing. If you haven't setup you billing or your currency is in INR or any other currency. You need to setup a new billing method. You can verify this by calling following url in your web browser for places API: https://maps.googleapis.com/maps/api/place/autocomplete/json?input=1600+Amphitheatre&key=YOUR_API_KEY

if it shows: { "error_message" : "You must enable Billing on the Google Cloud Project at https://console.cloud.google.com/project/_/billing/enable Learn more at https://developers.google.com/maps/gmp-get-started", "places" : [], "status" : "REQUEST_DENIED" }

that means you dont have access to API and you need to setup your billing you can visit: https://developers.google.com/maps/gmp-india-faq#bill-maps to learn how

and here is the code if you want

activity_maps.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" xmlns:map="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MapsActivity" android:orientation="vertical" android:weightSum="1"> <fragment android:id="@+id/autocomplete_fragment" android:layout_width="match_parent" android:layout_height="wrap_content" android:name="com.google.android.libraries.places.widget.AutocompleteSupportFragment" /> <fragment android:id="@+id/map" android:name="com.google.android.gms.maps.SupportMapFragment" android:layout_width="match_parent" android:layout_height="match_parent" map:uiZoomGestures="true"/> </LinearLayout>

MapsActivity.java to load maps and ad marker to your current place and selected place

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback { private GoogleMap mMap; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_maps); if (!Places.isInitialized()) { Places.initialize(getApplicationContext(), getString(R.string.api_key)); } PlacesClient placesClient = Places.createClient(this); //AutocompleteSessionToken token = AutocompleteSessionToken.newInstance(); // Initialize the AutocompleteSupportFragment. // Obtain the SupportMapFragment and get notified when the map is ready to be used. SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map); mapFragment.getMapAsync(this); AutocompleteSupportFragment autocompleteFragment = (AutocompleteSupportFragment) getSupportFragmentManager().findFragmentById(R.id.autocomplete_fragment); // Specify the types of place data to return. autocompleteFragment.setPlaceFields(Arrays.asList(Place.Field.ID, Place.Field.NAME, Place.Field.LAT_LNG)); // Set up a PlaceSelectionListener to handle the response. autocompleteFragment.setOnPlaceSelectedListener(new PlaceSelectionListener() { @Override public void onPlaceSelected(Place place) { // TODO: Get info about the selected place. LatLng dest = place.getLatLng(); mMap.addMarker(new MarkerOptions().position(dest).title("Destination")); //Log.i(TAG, "Place: " + place.getName() + ", " + place.getId()); } @Override public void onError(Status status) { // TODO: Handle the error. //Log.i(TAG, "An error occurred: " + status); } }); } /** * Manipulates the map once available. * This callback is triggered when the map is ready to be used. * This is where we can add markers or lines, add listeners or move the camera. In this case, * we just add a marker near Sydney, Australia. * If Google Play services is not installed on the device, the user will be prompted to install * it inside the SupportMapFragment. This method will only be triggered once the user has * installed Google Play services and returned to the app. */ @Override public void onMapReady(GoogleMap googleMap) { mMap = googleMap; //getting current location // Add a marker in Sydney and move the camera LatLng currentlocation = new LatLng(LocationService.lat, LocationService.lon);//change LocationService.lat and LocationService.lon with your current latitude and logitude that you have calculated mMap.addMarker(new MarkerOptions().position(currentlocation).title("Your Location")); mMap.moveCamera(CameraUpdateFactory.newLatLng(currentlocation)); } }
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2

if your fragment 'autoCompleteFragment' in Xml is already on another fragment you should use

getChildFragmentManager() //Java childFragmentManager //Kotlin

or if it where on an activity use

getSupportFragmentManager() //Java supportFragmentManager //Kotlin
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