我刚开始解析android中的JSON数据，我是这类问题的新手，这是我的代码。一切正常，但值没有显示在listView中。当我点击按钮时，它显示空白吐司，但JSON的值显示在logcat中。请任何人帮助在ListView中获取这些。
先谢谢。
JSON数据
Parameter
{
"UserId":"66"
}
Response
{
"success": "1",
"Review": [
{
"UserImages": "http:/example.org/upload/",
"UserName": "jaspreet",
"StoreReview": "5",
"StoreReviewTitle": "kjhjk",
"StoreReviewDescription": "hjkhk",
"ReviewLike": 1,
"TotalComments": 1,
"ReviewTime": "2017-07-07 09:02:52",
"Comments": [
[
{
"CommentId": "6",
"CommentUserPicture": "http://example.org/upload/",
"CommentUserName": "bvnb",
"Comment": "Avg",
"CommentTime": "2017-05-26 10:57:25"
}
]
]
}
]
}
public class MainActivity extends AppCompatActivity implements
View.OnClickListener {
Button btn_submit;
InternetConnectivity internetConnectivity;
private static final String URLS ="http://xyz/webservice/xyz.php";
ListView lvMovies;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lvMovies = (ListView) findViewById(R.id.lvMovies);
btn_submit = (Button) findViewById(R.id.btn_submit);
assert btn_submit != null;
btn_submit.setOnClickListener(this);
internetConnectivity = new InternetConnectivity(MainActivity.this);
}
@Override
public void onClick(View v) {
if (v.getId() == R.id.btn_submit) {
if (internetConnectivity.isInternetOn()) {
new AsyncTaskRunner().execute();
}
}
}
public String connection(String action) {
String result="";
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(URLS);// replace with your url
httpPost.addHeader("Content-type",
"application/x-www-form-urlencoded");
List<NameValuePair> nameValuePairList = new ArrayList<>();
nameValuePairList.add(new BasicNameValuePair(
"action", action));
nameValuePairList.add(new BasicNameValuePair(
"StoreId", "66"));
try {
UrlEncodedFormEntity urlEncodedFormEntity = new
UrlEncodedFormEntity(
nameValuePairList);
Log.e("nameValuePairList", " " + nameValuePairList);
httpPost.setEntity(urlEncodedFormEntity);
try {
HttpResponse httpResponse = httpClient
.execute(httpPost);
InputStream inputStream = httpResponse.getEntity()
.getContent();
InputStreamReader inputStreamReader = new InputStreamReader(
inputStream);
BufferedReader bufferedReader = new BufferedReader(
inputStreamReader);
StringBuilder stringBuilder = new StringBuilder();
String bufferedStrChunk = null;
while ((bufferedStrChunk = bufferedReader.readLine()) != null) {
stringBuilder.append(bufferedStrChunk);
}
Log.e("result", stringBuilder.toString());
result=stringBuilder.toString();
return stringBuilder.toString();
} catch (ClientProtocolException cpe) {
System.out
.println("First Exception coz of HttpResponese :"
+ cpe);
cpe.printStackTrace();
} catch (IOException ioe) {
System.out
.println("Second Exception coz of HttpResponse :"
+ ioe);
ioe.printStackTrace();
}
} catch (UnsupportedEncodingException uee) {
System.out
.println("An Exception given because of UrlEncodedFormEntity
argument :"
+ uee);
uee.printStackTrace();
}
return result;
}
private class AsyncTaskRunner extends AsyncTask<String, String,
List<ReviewModel>> {
ProgressDialog mProgressBar;
int success;
String msg;
@Override
protected List<ReviewModel> doInBackground(String... params) {
String result=connection("MainActivity");
List<ReviewModel> reviewModelList = new ArrayList<>();
try {
JSONObject jsonObject = new JSONObject(result);
success = jsonObject.getInt("success");
msg =jsonObject.getString("message");
JSONArray parentArray = jsonObject.getJSONArray("Review");
for(int i = 0; i<parentArray.length();i++){
JSONObject finalObject = parentArray.getJSONObject(i);
ReviewModel reviewModel = new ReviewModel();
reviewModel.setUserImages(finalObject.optString("UserImages"));
reviewModel.setUserName(finalObject.optString("UserName"));
reviewModel.setStoreReview((float)
finalObject.optDouble("StoreReview"));
reviewModel.setStoreReviewTitle(finalObject.optString("StoreReviewTitle"));
reviewModel.setStoreReviewDescription(finalObject.optString(
"StoreReviewDescription"));
reviewModel.setReviewLike(finalObject.optInt("ReviewLike"));
reviewModel.setTotalComments(finalObject.getInt("TotalComments"));
reviewModel.setReviewTime(finalObject.optString("ReviewTime"));
reviewModel.setUserImages(finalObject.optString("Comments"));
reviewModelList.add(reviewModel);
}
return reviewModelList;
}catch(Exception e){
e.printStackTrace();
}
return reviewModelList;
}
/*
* (non-Javadoc)
*
* @see android.os.AsyncTask#onPostExecute(java.lang.Object)
*/
@Override
protected void onPostExecute(List<ReviewModel> result) {
super.onPostExecute(result);
// execution of result of Long time consuming operation
mProgressBar.dismiss();
// Toast.makeText(SignUpActivity.this,resp,Toast.LENGTH_SHORT).show();
if(success == 0){
Toast.makeText(getApplicationContext(),msg,Toast.LENGTH_LONG).show();
}
else if(success == 1){
Toast.makeText(getApplicationContext(),msg,Toast.LENGTH_LONG).show();
}
else if(success == 2){
Toast.makeText(getApplicationContext(),msg,Toast.LENGTH_LONG).show();
}
ReviewAdapter reviewAdapter = new ReviewAdapter(getApplicationContext(),R.layout.row,result);
lvMovies.setAdapter(reviewAdapter);
}
/*
* (non-Javadoc)
*
* @see android.os.AsyncTask#onPreExecute()
*/
@Override
protected void onPreExecute() {
mProgressBar = new ProgressDialog(MainActivity.this);
mProgressBar.setMessage("Connecting to server");
mProgressBar.setCancelable(false);
mProgressBar.show();
}
}
public class ReviewAdapter extends ArrayAdapter{
private List<ReviewModel> reviewModelList;
private int resource;
private LayoutInflater inflater;
public ReviewAdapter(Context context, int resource, List<ReviewModel> objects) {
super(context, resource, objects);
reviewModelList = objects;
this.resource = resource;
inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null){
convertView = inflater.inflate(resource,null);
}
ImageView userImages;
TextView userName;
RatingBar storeReview;
TextView storeReviewdescription;
TextView reviewLike;
TextView storeReviewtitle;
TextView totalComments;
TextView riviewtime;
TextView comments;
userImages = (ImageView) convertView.findViewById(R.id.user_images);
userName = (TextView) convertView.findViewById(R.id.user_name);
storeReview = (RatingBar) convertView.findViewById(R.id.store_review);
storeReviewtitle = (TextView) convertView.findViewById(R.id.store_review_title);
storeReviewdescription = (TextView) convertView.findViewById(R.id.sotre_review_description);
reviewLike = (TextView) convertView.findViewById(R.id.review_like);
totalComments = (TextView) convertView.findViewById(R.id.total_comments);
riviewtime = (TextView) convertView.findViewById(R.id.review_time);
comments = (TextView) convertView.findViewById(R.id.comments);
userName.setText(reviewModelList.get(position).getUserName());
storeReviewtitle.setText(reviewModelList.get(position).getStoreReviewTitle());
storeReviewdescription.setText(reviewModelList.get(position).getStoreReviewDescription());
reviewLike.setText(reviewModelList.get(position).getReviewLike());
totalComments.setText(reviewModelList.get(position).getTotalComments());
riviewtime.setText("Year: " +reviewModelList.get(position).getReviewTime());
comments.setText(reviewModelList.get(position).getComments());
storeReview.setRating(reviewModelList.get(position).getStoreReview()/2);
return convertView;
}
}
}
public class ReviewModel {
private String UserImages;
private String UserName;
private Float StoreReview;
private String StoreReviewTitle;
private String StoreReviewDescription;
private String ReviewTime;
private int ReviewLike;
private int TotalComments;
private String Comments;
private List<Comments> commentsList;
public String getUserImages() {
return UserImages;
}
public void setUserImages(String userImages) {
UserImages = userImages;
}
public String getUserName() {
return UserName;
}
public void setUserName(String userName) {
UserName = userName;
}
public Float getStoreReview() {
return StoreReview;
}
public void setStoreReview(Float storeReview) {
StoreReview = storeReview;
}
public String getStoreReviewTitle() {
return StoreReviewTitle;
}
public void setStoreReviewTitle(String storeReviewTitle) {
StoreReviewTitle = storeReviewTitle;
}
public String getStoreReviewDescription() {
return StoreReviewDescription;
}
public void setStoreReviewDescription(String storeReviewDescription) {
StoreReviewDescription = storeReviewDescription;
}
public String getReviewTime() {
return ReviewTime;
}
public void setReviewTime(String reviewTime) {
ReviewTime = reviewTime;
}
public int getReviewLike() {
return ReviewLike;
}
public void setReviewLike(int reviewLike) {
ReviewLike = reviewLike;
}
public int getTotalComments() {
return TotalComments;
}
public void setTotalComments(int totalComments) {
TotalComments = totalComments;
}
public String getComments() {
return Comments;
}
public void setComments(String comments) {
Comments = comments;
}
public List<ReviewModel.Comments> getCommentsList() {
return commentsList;
}
public void setCommentsList(List<ReviewModel.Comments> commentsList) {
this.commentsList = commentsList;
}
public ReviewModel() {
}
public static class Comments{
private String CommentUserPicture;
private String CommentUserName;
private String Comment;
public String getCommentUserPicture() {
return CommentUserPicture;
}
public void setCommentUserPicture(String commentUserPicture) {
CommentUserPicture = commentUserPicture;
}
public String getCommentUserName() {
return CommentUserName;
}
public void setCommentUserName(String commentUserName) {
CommentUserName = commentUserName;
}
public String getComment() {
return Comment;
}
public void setComment(String comment) {
Comment = comment;
}
}
}
答案 0 :(得分：0)
您的JSON响应应该是这样的，然后您可以提取。
{
"UserId": "66",
"success": "1",
"Review": [{
"UserImages": "http:/example.org/upload/",
"UserName": "jaspreet",
"StoreReview": "5",
"StoreReviewTitle": "kjhjk",
"StoreReviewDescription": "hjkhk",
"ReviewLike": 1,
"TotalComments": 1,
"ReviewTime": "2017-07-07 09:02:52",
"Comments": [
[{
"CommentId": "6",
"CommentUserPicture": "http://example.org/upload/",
"CommentUserName": "bvnb",
"Comment": "Avg",
"CommentTime": "2017-05-26 10:57:25"
}]
]
}]
}