android - cannot request in JsonArrayRequest - php

Question

I am a student studying Volley request.
There's an error that I can't solve, so I'm asking you to find a solution.
I don't understand why can't POST from Android to PHP at all.
It worked well in other situations, but not only in JsonArrayRequest.
I'll attach the code, so if there's any problem with my code, please let me know.
This is string request code in Android Studio
package kr.ac.castcommunity.cc.request
import android.util.Log
import com.android.volley.Request
import com.android.volley.Response
import com.android.volley.Response.success
import com.android.volley.toolbox.JsonArrayRequest
import com.android.volley.toolbox.StringRequest
import java.util.HashMap
import org.json.JSONObject
import com.android.volley.toolbox.JsonObjectRequest
import org.json.JSONArray
class CommentRequest(boardid : String , listener: Response.Listener<JSONArray>) :
JsonArrayRequest(Request.Method.POST, URL, JSONArray(), listener, Response.ErrorListener { error ->
Log.d("COMMENT ERROR", "Server Response FAIL: $error")
}) {
private val parameters: MutableMap<String, String>
companion object {
private val URL = "http://MyIP/cc/commentlist.php"
}
init {
parameters = HashMap()
parameters["boardid"] = boardid
Log.d("boardID :",boardid)
}
override fun getParams(): Map<String, String> {
return parameters
}
}
This is PHP code
(It works well if I randomly assign a variable.)
(But it doesn't work when I interlock it.)
<?php
$con = mysqli_connect("localhost", "root", "root", "cc");
mysqli_query($con, 'SET NAMES utf8');
$boardid = $_POST["boardid"]; // but It's not operating
//$boardid = "1"; // It's operating
$boardid = (int)$boardid;
$statement = mysqli_prepare($con, "select * from comment where boardid = ?");
mysqli_stmt_bind_param($statement, "i", $boardid);
mysqli_stmt_execute($statement);
mysqli_stmt_store_result($statement);
mysqli_stmt_bind_result($statement, $commentid, $boardid, $content, $writer, $date);
$response = array();
$response["success"] = false;
$result = array();
while(mysqli_stmt_fetch($statement)){
$response["success"] = true;
$response["commentid"] = $commentid;
$response["boardid"] = $boardid;
$response["content"] = $content;
$response["writer"] = $writer;
$response["date"] = substr($date,10,-3);
array_push($result, array(
"success"=>$response["success"],
"commentid" => $response["commentid"],
"boardid" => $response["boardid"],
"content" => $response["content"],
"writer" => $response["writer"],
"date" => $response["date"]));
}
echo json_encode($result);
?>
D/COMMENT ERROR: Server Response Fail: com.android.volley.ParseError: org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONArray
and response code
val boardid = intent.getIntExtra("bnum", 0)
mCommentRecyclerView = comment_recyclerView
val responseListener = Response.Listener<JSONArray> { response ->
try {
Log.d("response", "comment response Start")
for (i in 0 until response.length()) {
val jobject = response.getJSONObject(i)
val success = jobject.getBoolean("success")
val boardid = jobject.getInt("boardid")
val commentid = jobject.getInt("commentid")
val content = jobject.getString("content")
val date = jobject.getString("date")
val writer = jobject.getString("writer")
if (success == true) {
mDatas.add(Comment(boardid, commentid, content, date, writer))
} else {
return#Listener
}
}
mAdpater = CommentAdapter(this, mDatas)
mCommentRecyclerView!!.adapter = mAdpater
mCommentRecyclerView!!.addItemDecoration(BoardDecoration(20))
val lm = LinearLayoutManager(this)
lm.reverseLayout = true
lm.stackFromEnd = true
mCommentRecyclerView!!.layoutManager = lm
mCommentRecyclerView!!.setHasFixedSize(true)
val decoration = DividerItemDecoration(this, LinearLayoutManager.VERTICAL)
mCommentRecyclerView!!.addItemDecoration(decoration)
} catch (e: JSONException) {
e.printStackTrace()
}
}
val commentRequest = CommentRequest(boardid.toString(), responseListener)
val queue = Volley.newRequestQueue(this#DetailActivity)
queue.add(commentRequest)
I really don't know why. I need your help.

Answer 1

Through your error message. I think there is a problem with the conversion of String to JsonObject.
You can print out the response from the server first, and then print out the conversion parameters.
I think the error appears in the for loop code below. Please check if the error is caused by the <br> tag.
Log.d("response", "comment response Start")
for (i in 0 until response.length()) {
val jobject = response.getJSONObject(i)
val success = jobject.getBoolean("success")
val boardid = jobject.getInt("boardid")
val commentid = jobject.getInt("commentid")
val content = jobject.getString("content")
val date = jobject.getString("date")
val writer = jobject.getString("writer")
println(jobject)
println(success)
println(boardid)
println(commentid)
println(content)
println(date)
println(writer)
if (success == true) {
mDatas.add(Comment(boardid, commentid, content, date, writer))
} else {
return#Listener
}
}