我检查过并确保启用了google places api for android。
起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
并改为：
https://maps.googleapis.com/maps/api/place/details/json? reference=REFERENCE_STRING_OF_THE_PLACE&sensor=true&key=YOUR_PLACE_API_KEY
根据
中的建议Android - Google Places API - No "reviews" Array
但仍然遇到同样的错误。
在https://developers.google.com/places/web-service/details
上据说已弃用引用，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
后来我读了stackoverflow，在2012年google places API没有提供评论的功能。这适用于现在吗？ 2016年？如果没有，请帮助我在我的代码中破译我做错（正在做的）错误。
如果我复制并粘贴上述任何网址的任何日志输出，则评论会显示在我的浏览器中，但响应中的输出不显示网址。
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：
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);
}
}
答案 0 :(得分：1)
下面是获取评论的示例代码。您需要了解代码并对代码进行必要的更改。
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();
它使用Review_Text打印Author_Name。
更新您的代码，如下所示 -
更改JSONArray parentArray = json.getJSONArray("reviews");
到JSONArray parentArray = json.getJSONArray("result");
更改 setPlace（），如下所示 -
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;
}
我在 MyModal 中未找到 setAuthor_name（）和 setText（）方法，因此请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;
}
}
最后更改Log stmt，如下所示 MainActivity -
Log.e("review SingleVewInit",result.get(i).getAuthor_name());
Log.e("review SingleVewInit",result.get(i).getText());
答案 1 :(得分：0)
@kevz
我认为你原来的答案已经足够好了。不需要异步任务。我创建了一个小项目来测试你的想法，它工作了!!!试图将它们与我的代码结合起来会导致混乱。请参阅下文，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，应该足够了：
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