即使添加值后ArrayList也为空

问题描述

我正在开发一个用户显示其所在地区不同场所的应用程序,为此,我正在使用google place API。我将所有结果存储在ArrayList中,但是由于某些原因,将它们添加到ArrayList的代码未运行。知道可能是什么原因吗?作为参考,我的代码的相关部分如下:

private void handleAutoCompleteRequest(FindAutocompletePredictionsRequest request) {
    // Create a new Places client instance.
    PlacesClient placesClient = Places.createClient(this);

    placesClient.findAutocompletePredictions(request).addOnSuccessListener((response) -> {
        for (AutocompletePrediction prediction : response.getAutocompletePredictions()) {

            Log.d("PLACEID",prediction.getPlaceId());
            Log.d("PLACENAME",prediction.getPrimaryText(null).toString());

            placeID = prediction.getPlaceId();
            placeName = prediction.getPrimaryText(null).toString();


            // Define a Place ID.
            final String placeId = placeID;

            // Specify the fields to return.
            final List<Place.Field> placeFields = Arrays.asList(Place.Field.ID,Place.Field.NAME,Place.Field.ADDRESS,Place.Field.BUSInesS_STATUS,Place.Field.rating,Place.Field.PHOTO_MetaDATAS);

            // Construct a request object,passing the place ID and fields array.
            final FetchPlaceRequest request1 = FetchPlaceRequest.newInstance(placeId,placeFields);

            placesClient.fetchPlace(request1).addOnSuccessListener((response1) -> {

                Place place = response1.getPlace();

                Log.d("name","Place found: " + place.getName());
                Log.d("address","Place found: " + place.getAddress());
                Log.d("hours","Place found: " + place.getBusinessstatus());

                String statusstring = String.valueOf(place.getBusinessstatus());
                String ratingString = String.valueOf(place.getrating());


                Log.d("placeStatus",statusstring);
                Log.d("placerating",ratingString);

                //PHOTOS///////////////////////////////////////////

                // Get the photo Metadata.
                final List<PhotoMetadata> Metadata = place.getPhotoMetadatas();
                if (Metadata == null || Metadata.isEmpty()) {
                    Log.w("Metadatanull","No photo Metadata.");
                    return;
                }
                final PhotoMetadata photoMetadata = Metadata.get(0);

                // Get the attribution text.
                final String attributions = photoMetadata.getAttributions();

                // Create a FetchPhotoRequest.
                final FetchPhotoRequest photoRequest = FetchPhotoRequest.builder(photoMetadata)
                        .setMaxWidth(500) // Optional.
                        .setMaxHeight(300) // Optional.
                        .build();

                placesClient.fetchPhoto(photoRequest).addOnSuccessListener((fetchPhotoResponse) -> {
                    placePhoto = fetchPhotoResponse.getBitmap();


                    Log.d("isthisrunning","yesitsrunning");


                    TenderSuggestion mySuggestion = new TenderSuggestion(place.getAddress(),place.getName(),place.getId(),statusstring,ratingString,placePhoto);
                    TenderSuggestions.add(mySuggestion);
                    Log.d("testArrayList","added");


                    for (int i = 0; i < TenderSuggestions.size(); i++) {
                        String master = TenderSuggestions.get(i).getSuggestionName();

                        for (int p = 0; p < TenderSuggestions.size(); p++) {
                            if (p != i) {
                                String subject = TenderSuggestions.get(p).getSuggestionName();
                                if (master.equals(subject)) {
                                    TenderSuggestions.remove(p);
                                    i--;
                                }
                            }
                        }
                    }

                    NUM_PAGES = TenderSuggestions.size();

                    Log.d("Arraylength1",String.valueOf(TenderSuggestions.size()));

                }).addOnFailureListener((exception) -> {
                    if (exception instanceof ApiException) {
                        final ApiException apiException = (ApiException) exception;
                        Log.e("placeError","Place not found: " + exception.getMessage());
                        final int statusCode = apiException.getStatusCode();
                        // Todo: Handle error with given status code.
                    }
                });


            }).addOnFailureListener((exception) -> {

                if (exception instanceof ApiException) {

                    final ApiException apiException = (ApiException) exception;

                    Log.d("error","Place not found: " + exception.getMessage());

                    final int statusCode = apiException.getStatusCode();
                    // Todo: Handle error with given status code.
                }
                Log.d("error","Place not found: " + exception.getMessage());

            });

        }

    }).addOnFailureListener((exception) -> {
        if (exception instanceof ApiException) {
            ApiException apiException = (ApiException) exception;
            Log.d("ERROR","Place not found: " + apiException.getStatusCode());
        }
    });
    
}

解决方法

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