Android Java Google Places GET（拉出）评论JSONException没有评论的值

Question

我检查并确保启用了适用于Android的Google Places API。

最初我使用的是这个网址：

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

并切换到此：

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

按照中的建议

Android-Google Places API-没有“评论”数组

但仍然出现相同的错误。

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

据说已弃用了引用，现在我们必须使用place_id。 我将网址更改为：

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

稍后，我读了stackoverflow，在2012年Google Places API没有提供评论的功能。 现在适用吗？ 在2016年？ 如果没有，请帮助我在我做错的事情下面破译我的代码。

如果我复制并粘贴上述任何URL的任何日志输出，则评论将显示在我的浏览器中，但响应中的输出未显示URL。

我收到此错误：

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)

这是我的代码如下：

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，下面是获取评论的示例代码。 您需要了解代码并进行必要的更改才能在代码中工作。

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();

它打印带有Author_Name和Review_Text的Author_Name。

如下更新代码-

1. 在DownloadReviewsTask中 -

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

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

2. 将setPlace（）更改为以下内容-

    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，因此将其更改为以下内容-

    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中那样更改Log stmt-

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

Answer 2

@kevz

我认为您的原始答案足够好。 不需要异步任务。 我创建了一个小项目，只是为了测试您的想法，并且成功了！！！ 尝试将它们与我的代码结合会导致混乱。 以防万一它可以帮助任何人：

    <?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，应足够：

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();
            }
        });

    }
}

这是输出：

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