ApiException: 9003: PLACES_API_ACCESS_NOT_CONFIGURED

Many friends suggested me to post how I have implemented this(AutoComplete) on my Project .So I am suggested you to see this migration guide and implement on your project step by step.

Migration Guide:-https://developers.google.com/places/android-sdk/client-migration

GO to this link to create API Key:

Follows this steps to implement AutoComplete in your project :-

There is two way to implement to AutoComplete .

1. Using Intent

2. Using AutocompleteFragment

   In both case follow these steps:-

    1. Add this line in build.gradle file
   
   dependencies {
     implementation 'com.google.android.libraries.places:places:2.1.0'
   }
   
    2. Add other dependencies (This is optional) .
   
   dependencies {
     implementation 'com.google.android.libraries.places:places-compat:1.0.0'
   }
   
   implementation 'com.google.android.gms:play-services-places:16.0.0'
   
    3. // Add an import statement for the client library.
   
   import com.google.android.libraries.places.api.Places;
   
   // Initialize Places.
   
   Places.initialize(getApplicationContext(), apiKey);
   
   // Create a new Places client instance.
   
   PlacesClient placesClient = Places.createClient(this);
   

   ———-Now Choose any of the method you want to implement in your project.—–

   Using Intent

    if (!Places.isInitialized()) {
           Places.initialize(getApplicationContext(), "YOUR_API_KEY");
       }
   
       ...
   
       // Set the fields to specify which types of place data to return.
       List<Place.Field> fields = Arrays.asList(Place.Field.ID, Place.Field.NAME);
   
       // Start the autocomplete intent.
       Intent intent = new Autocomplete.IntentBuilder(
               AutocompleteActivityMode.FULLSCREEN, fields)
               .build(this);
       startActivityForResult(intent, AUTOCOMPLETE_REQUEST_CODE);
   
   
   and OnActivityResult method-------
   
   
       /**
        * Override the activity's onActivityResult(), check the request code, and
        * do something with the returned place data (in this example it's place name and place ID).
        */
       @Override
       protected void onActivityResult(int requestCode, int resultCode, Intent data) {
           if (requestCode == AUTOCOMPLETE_REQUEST_CODE) {
               if (resultCode == RESULT_OK) {
                   Place place = Autocomplete.getPlaceFromIntent(data);
                   Log.i(TAG, "Place: " + place.getName() + ", " + place.getId());
               } else if (resultCode == AutocompleteActivity.RESULT_ERROR) {
                   // TODO: Handle the error.
                   Status status = Autocomplete.getStatusFromIntent(data);
                   Log.i(TAG, status.getStatusMessage());
               } else if (resultCode == RESULT_CANCELED) {
                   // The user canceled the operation.
               }
           }
       }
   

   Using Fregment

   Initialize this Autocomplete Fregment on .xml file

   <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"
     />
   

   ————– and on .class file————————–

   Initialize Places, passing the application context and your API key.
   Initialize the AutocompleteSupportFragment.
   Call setPlaceFields() to indicate the types of place data that you want to get.
   Add a PlaceSelectionListener to do something with the result, as well as handle any errors that might occur.
   The following example shows adding an autocomplete widget to an activity:

    if (!Places.isInitialized()) {
           Places.initialize(getApplicationContext(), "YOUR_API_KEY");
       }
   
   
       // Initialize the AutocompleteSupportFragment.
   
       AutocompleteSupportFragment autocompleteFragment = (AutocompleteSupportFragment)
               getSupportFragmentManager().findFragmentById(R.id.autocomplete_fragment);
   
   
       autocompleteFragment.setPlaceFields(Arrays.asList(Place.Field.ID, Place.Field.NAME));
   
   
       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);
           }
       });
   

And Get LATLONG from selected place like this:-

    LatLng latLng = place.getLatLng();
    String mStringLatitude = String.valueOf(latLng.latitude);
    String mStringLongitude = String.valueOf(latLng.longitude);

Hope this will help you .