Android Java Google Places GET（拉出）評論JSONException沒有評論的值

Question

我檢查並確保啟用了適用於Android的Google Places API。

最初我使用的是這個網址：

https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=34.0467359,-118.441764&radius=1000&sensor=true&key=YOUR_PLACE_API_KEY

並切換到此：

https://maps.googleapis.com/maps/api/place/details/json? reference=REFERENCE_STRING_OF_THE_PLACE&sensor=true&key=YOUR_PLACE_API_KEY

按照中的建議

Android-Google Places API-沒有“評論”數組

但仍然出現相同的錯誤。

在https://developers.google.com/places/web-service/details

據說已棄用了引用，現在我們必須使用place_id。 我將網址更改為：

https://maps.googleapis.com/maps/api/place/details/json?placeid=ChIJN1t_tDeuEmsRUsoyG83frY4&key=YOUR_API_KEY

稍后，我讀了stackoverflow，在2012年Google Places API沒有提供評論的功能。 現在適用嗎？ 在2016年？ 如果沒有，請幫助我在我做錯的事情下面破譯我的代碼。

如果我復制並粘貼上述任何URL的任何日志輸出，則評論將顯示在我的瀏覽器中，但響應中的輸出未顯示URL。

我收到此錯誤：

W/System.err: org.json.JSONException: No value for reviews 

W/System.err:     at org.json.JSONObject.get(JSONObject.java:389) 

W/System.err:     at org.json.JSONObject.getJSONArray(JSONObject.java:584)

W/System.err:    at DownloadReviewsTask.doInBackground(DownloadReviewsTask.java:69)

W/System.err:     at DownloadReviewsTask.doInBackground(DownloadReviewsTask.java:19)

W/System.err:     at android.os.AsyncTask$2.call(AsyncTask.java:292)

W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:237)

W/System.err:     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)  

W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 

W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 

W/System.err:     at java.lang.Thread.run(Thread.java:818)

這是我的代碼如下：

public class JSONParser {

    String charset = "UTF-8";
    HttpURLConnection conn;
    DataOutputStream wr;
    StringBuilder result = new StringBuilder();
    URL urlObj;
    JSONObject jObj = null;

    StringBuilder sbParams;
    String paramsString;

    public JSONObject makeHttpRequest(String url, String method,
                                      HashMap<String, String> params) {

        sbParams = new StringBuilder();
        int i = 0;
        for (String key : params.keySet()) {
            try {
                if (i != 0){
                    sbParams.append("&");
                }
                sbParams.append(key).append("=")
                        .append(URLEncoder.encode(params.get(key), charset));

            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
            i++;
        }

        if (method.equals("POST")) {
            // request method is POST
            try {
                urlObj = new URL(url);

                conn = (HttpURLConnection) urlObj.openConnection();

                conn.setDoOutput(true);

                conn.setRequestMethod("POST");

                conn.setRequestProperty("Accept-Charset", charset);

                conn.setReadTimeout(90000);
                conn.setConnectTimeout(90000);

                conn.connect();

                paramsString = sbParams.toString();

                wr = new DataOutputStream(conn.getOutputStream());
                wr.writeBytes(paramsString);
                wr.flush();
                wr.close();

            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        else if(method.equals("GET")){
            // request method is GET

            if (sbParams.length() != 0) {
                url += "?" + sbParams.toString();
            }

            try {
                urlObj = new URL(url);

                conn = (HttpURLConnection) urlObj.openConnection();

                conn.setDoOutput(false);

                conn.setRequestMethod("GET");

                conn.setRequestProperty("Accept-Charset", charset);

                conn.setConnectTimeout(90000);

                conn.connect();

            } catch (IOException e) {
                e.printStackTrace();
            }

        }

        try {
            //Receive the response from the server
            InputStream in = new BufferedInputStream(conn.getInputStream());
            BufferedReader reader = new BufferedReader(new InputStreamReader(in));

            String line;
            while ((line = reader.readLine()) != null) {
                result.append(line);
            }

            Log.d("JSON Parser", "result: " + result.toString());


        } catch (IOException e) {
            e.printStackTrace();
        }

        conn.disconnect();

        // try parse the string to a JSON object

        try {
            jObj = new JSONObject(result.toString());
        } catch (JSONException e) {
            Log.e("JSON Parser", "Error parsing data " + e.toString());
        }

        // return JSON Object
        return jObj;

    }

}

public class DownloadReviewsTask extends AsyncTask<String, Void, HashMap<String, List<MyModel>>> {
    //Declarations
    private Context mContext;
    public Exception mException;
    private OnEventListener<HashMap<String, List<MyModel>>> mCallBack;
    JSONArray reviews;
    String author_name;
    String text;
    //Constructor
    public DownloadReviewsTask(Context context, OnEventListener callback) {
        mCallBack = callback;
        mContext = context;
    }
    //sets and passes the review author and text for each review and sets them in the My Model
    public MyModel setPlace(JSONObject thisObject) throws JSONException {
        JSONObject results = thisObject.getJSONObject("results");
       MyModel thisMyModel = new MyModel();
        if (!results.isNull("reviews")) {
            reviews = results.getJSONArray("reviews");
            Log.e("reviews array setPlace", String.valueOf(reviews));
            for (int i = 0; i < reviews.length(); i++) {
                //if(i==reviews.length()) break;
               // if (thisObject.getJSONArray("reviews").getJSONObject(i).has("author_name")) //{
                    author_name = results.getJSONArray("reviews").getJSONObject(i).getString("author_name");//reviews.getJSONObject(i).getString("author");
                    Log.e("review_author in setup", results.getJSONArray("reviews").getJSONObject(i).getString("author_name"));
               // }
                //if (thisObject.getJSONArray("reviews").getJSONObject(i).has("text")) {
                    Log.e("review text in setup", results.getJSONArray("reviews").getJSONObject(i).getString("text"));
                    text = results.getJSONArray("reviews").getJSONObject(i).getString("text");//}

                thisMyModel.setAuthor_name(author_name);
                thisMyModel.setText(text);
            }
        }
        return thisMyModel;
    }

    @Override
    protected HashMap<String, List<MyModel>> doInBackground(String... args) {
        try {
            JSONParser jsonParser = new JSONParser();
            JSONObject json;
            String reviewUrl = args[0];
            Log.e("reviewUrl",reviewUrl);
            //Use a HashMap instead with the varargs:
            HashMap<String, String> params = new HashMap<>();
            json = jsonParser.makeHttpRequest(reviewUrl, "GET", params);
            HashMap<String, List<MyModel>> myResults = new HashMap<>();
            if(json != null) {
                Log.e("reviews result", json.toString());
                JSONArray parentArray = json.getJSONArray("reviews");
                List<MyModel> allEventsList = new ArrayList<>();
                //loops through json array
                for (int i = 0; i < parentArray.length(); i++) {
                    JSONObject finalObject = parentArray.getJSONObject(i);
                    allEventsList.add(setPlace(finalObject));
                    Log.e("allEventsList", String.valueOf(allEventsList));
                }
                myResults.put("reviews", allEventsList);
                Log.e("myResults",String.valueOf(myResults));
                return myResults;

            }else{
                return null;
            }
        }
        catch (JSONException e){
            e.printStackTrace();
        }
        return null;

    }

    @Override
    protected void onPostExecute(HashMap<String, List<MyModel>> result) {
        if (mCallBack != null) {
            if (mException == null) {
                mCallBack.onSuccess(result);
            } else {
                mCallBack.onFailure(mException);
            }
        }
    }
}

public class MyModel{
        private String reference;
        public void setReference(String reference) {
            this.reference = reference;
        }
        public String getReference() {
            return reference;
        }
    }

public class MainActivity{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
              String reviewsUrl = "https://maps.googleapis.com/maps/api/place/details/json?reference="+reference+sensor+key;
                  DownloadReviewsTask rev = new DownloadReviewsTask(this, new OnEventListener<HashMap<String, List<MyModel>>>() {

                @Override
                public void onSuccess(HashMap<String, List<MyModel>> result) {
                    if(result != null && result.size() > 0) {
                        for (int i = 0; i < result.size(); i++){
                            Log.e("review SingleVewInit",result.get("reviews").get(0).getAuthor_name());
                            Log.e("review SingleVewInit",result.get("reviews").get(0).getText());
                        }
                    }
                }

                @Override
                public void onFailure(Exception e) {
                    //Toast.makeText(this, "ERROR: " + e.getMessage(), Toast.LENGTH_LONG).show();
                    Log.e("ERROR: " ,e.getMessage());
                }
            });
            rev.execute(reviewsUrl);
  }

}

Answer 1

好的，下面是獲取評論的示例代碼。 您需要了解代碼並進行必要的更改才能在代碼中工作。

new Thread(new Runnable() {
        @Override
        public void run() {

            try {

                URL url = new URL("https://maps.googleapis.com/maps/api/place/details/json?placeid=ChIJN1t_tDeuEmsRUsoyG83frY4&key=AIzaSyAAkK3AyE8Cbqb9H5MYqptjJwRhRgltoZM");
                HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                InputStream in = connection.getInputStream();

                int ch = -1;
                StringBuffer buffer = new StringBuffer();
                while((ch = in.read()) != -1){
                    buffer.append((char)ch);
                }

                JSONObject jObj = new JSONObject(buffer.toString());
                JSONObject jResult = jObj.getJSONObject("result");
                JSONArray jReviewArray = jResult.getJSONArray("reviews");

                for(int i=0; i<jReviewArray.length(); i++){
                    JSONObject jReview = jReviewArray.getJSONObject(i);
                    System.out.println( jReview.getString("author_name") +"\n"+ jReview.getString("text") +"\n\n");
                }

            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (JSONException e) {
                e.printStackTrace();
            }

        }
    }).start();

它打印帶有Author_Name和Review_Text的Author_Name。

如下更新代碼-

1. 在DownloadReviewsTask中 -

更改JSONArray parentArray = json.getJSONArray("reviews");

到JSONArray parentArray = json.getJSONArray("result");

2. 將setPlace（）更改為以下內容-

    public MyModel setPlace(JSONObject thisObject) throws JSONException { MyModel thisMyModel = new MyModel(); author_name = thisObject.getString("author_name"); text = thisObject.getString("text"); thisMyModel.setAuthor_name(author_name); thisMyModel.setText(text); return thisMyModel; } 

3. 我在MyModal中未找到setAuthor_name（）和setText（）方法，因此將其更改為以下內容-

    public class MyModel{ private String reference; private String author_name; private String text; public void setAuthor_name(String author_name) { this.author_name = author_name; } public String getAuthor_name() { return author_name; } public void setText(String text) { this.text = text; } public String getText() { return text; } public void setReference(String reference) { this.reference = reference; } public String getReference() { return reference; } } 

4. 最后像下面在MainActivity中那樣更改Log stmt-

    Log.e("review SingleVewInit",result.get(i).getAuthor_name()); Log.e("review SingleVewInit",result.get(i).getText()); 

Answer 2

@kevz

我認為您的原始答案足夠好。 不需要異步任務。 我創建了一個小項目，只是為了測試您的想法，並且成功了！！！ 嘗試將它們與我的代碼結合會導致混亂。 以防萬一它可以幫助任何人：

    <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".Places">
    <Button
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:text="@string/text_author"
        android:id="@+id/button_id"/>
</RelativeLayout>

及以下，應足夠：

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;

public class Places extends AppCompatActivity {
    Button button;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_places);
        button = (Button) findViewById(R.id.button_id);

        button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                // Perform action on click
                new Thread(new Runnable() {
                    @Override
                    public void run() {

                        try {

                            URL url = new java.net.URL("https://maps.googleapis.com/maps/api/place/details/json?placeid=ChIJN1t_tDeuEmsRUsoyG83frY4&key=AIzaSyAAkK3AyE8Cbqb9H5MYqptjJwRhRgltoZM");
                            //HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                            InputStream in = url.openStream();

                            int ch = -1;
                            StringBuffer buffer = new StringBuffer();
                            while ((ch = in.read()) != -1) {
                                buffer.append((char) ch);
                            }

                            JSONObject jObj = new JSONObject(buffer.toString());
                            JSONObject jResult = jObj.getJSONObject("result");
                            JSONArray jReviewArray = jResult.getJSONArray("reviews");
                            //Float rating = (float)jResult.getDouble("rating");
                            for (int i = 0; i < jReviewArray.length(); i++) {
                                JSONObject jReview = jReviewArray.getJSONObject(i);
                                Log.e("review",jReview.getString("author_name") + "\n" + jReview.getString("text") + "\n\n");
                                Log.e("rating", jResult.getString("rating") + "\n");
                            }

                        } catch (MalformedURLException e) {
                            e.printStackTrace();
                        } catch (IOException | JSONException e) {
                            e.printStackTrace();
                        }

                    }
                }).start();
            }
        });

    }
}

這是輸出：

Justine OBRIEN
                                                                          Fabulous location. Wonderful warm welcoming reception. Excellent unique living Google wall entry. Sensational helpful kind people. Easy fast efficient help online plus with appointment on site. Super company always progressive plus innovative products and services for all businesses. Go Google Australia. Shine on! 
 E/rating: 4.6
 E/review: James Pallett
                                                                          I can not understand why Google would choose Titan Digital as one their 14 Premier Partners. It was on this basis that I choose Titan to build my new web site. It is costing me dearly. All words, no action, over promise, under deliver. My second biggest complaint, of many, about Titan, after the total mismanagement of my project, is Titan's lack of communication. Days and weeks go by without a word. Inquiries are either ignored or treated with indifference. Almost eight months have passed since I signed up for a new web site and inquiries receive no urgency, only platitudes. To add insult to injury, Titan has the audacity to charge for monthly web maintenance for a web site still long overdue in production. Be warned.
 E/rating: 4.6
 E/review: Dorothy Ooko
                                                                          Cool offices.... Reception on the 5th floor. Best coffee barrista is on the 4thð
 E/rating: 4.6
 E/review: Taylor Hayes
                                                                          Absolute joke trying to find who to deal with in regards to services i have paid for. Happy to take the money and told its all easy . . . .weeks i have waited to finish verifying my coffee shop after purchasing a virtual tour pathetic aftercare
 E/rating: 4.6
 E/review: TheHealthRetreat
                                                                          I spend 250 thousand dollars a year with Google adwords..
                                                                          I own a Mental Health Drug and alcohol retreat.
 E/rating: 4.6
 E/review: Justine OBRIEN
                                                                          Fabulous location. Wonderful warm welcoming reception. Excellent unique living Google wall entry. Sensational helpful kind people. Easy fast efficient help online plus with appointment on site. Super company always progressive plus innovative products and services for all businesses. Go Google Australia. Shine on! 
 E/rating: 4.6
 E/review: James Pallett
                                                                          I can not understand why Google would choose Titan Digital as one their 14 Premier Partners. It was on this basis that I choose Titan to build my new web site. It is costing me dearly. All words, no action, over promise, under deliver. My second biggest complaint, of many, about Titan, after the total mismanagement of my project, is Titan's lack of communication. Days and weeks go by without a word. Inquiries are either ignored or treated with indifference. Almost eight months have passed since I signed up for a new web site and inquiries receive no urgency, only platitudes. To add insult to injury, Titan has the audacity to charge for monthly web maintenance for a web site still long overdue in production. Be warned.
 E/rating: 4.6
 E/review: Dorothy Ooko
                                                                          Cool offices.... Reception on the 5th floor. Best coffee barrista is on the 4thð
 E/rating: 4.6
 E/review: Taylor Hayes
                                                                          Absolute joke trying to find who to deal with in regards to services i have paid for. Happy to take the money and told its all easy . . . .weeks i have waited to finish verifying my coffee shop after purchasing a virtual tour pathetic aftercare
 E/rating: 4.6
 E/review: TheHealthRetreat
                                                                          I spend 250 thousand dollars a year with Google adwords..
                                                                          I own a Mental Health Drug and alcohol retreat.
 E/rating: 4.6
 E/review: Justine OBRIEN
                                                                          Fabulous location. Wonderful warm welcoming reception. Excellent unique living Google wall entry. Sensational helpful kind people. Easy fast efficient help online plus with appointment on site. Super company always progressive plus innovative products and services for all businesses. Go Google Australia. Shine on! 
 E/rating: 4.6
 E/review: James Pallett
                                                                          I can not understand why Google would choose Titan Digital as one their 14 Premier Partners. It was on this basis that I choose Titan to build my new web site. It is costing me dearly. All words, no action, over promise, under deliver. My second biggest complaint, of many, about Titan, after the total mismanagement of my project, is Titan's lack of communication. Days and weeks go by without a word. Inquiries are either ignored or treated with indifference. Almost eight months have passed since I signed up for a new web site and inquiries receive no urgency, only platitudes. To add insult to injury, Titan has the audacity to charge for monthly web maintenance for a web site still long overdue in production. Be warned.
 E/rating: 4.6
 E/review: Dorothy Ooko
                                                                          Cool offices.... Reception on the 5th floor. Best coffee barrista is on the 4thð
 E/rating: 4.6
 E/review: Taylor Hayes
                                                                          Absolute joke trying to find who to deal with in regards to services i have paid for. Happy to take the money and told its all easy . . . .weeks i have waited to finish verifying my coffee shop after purchasing a virtual tour pathetic aftercare
 E/rating: 4.6
 E/review: TheHealthRetreat
                                                                          I spend 250 thousand dollars a year with Google adwords..
                                                                          I own a Mental Health Drug and alcohol retreat.
E/rating: 4.6