我正在尝试遵循有关使用php和sql将数据插入数据库的教程。当我的应用程序运行时，当我的JSONParser.class尝试将字符串转换为JSONParser.java的第92行上的JSONObject时，尝试将数据插入数据库失败，错误为
2019-05-21 10:32:10.490 7491-7541/com.example.sqltest E/JSON Parser: Error parsing data org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
我的问题是我无法在代码中的任何地方找到
<br
被转换为字符串。我什至找不到任何代码中的字符组合。我的服务器上还没有任何html文件，并且我的php中没有分页符。
这是我的JSONParser.java
package com.example.sqltest;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
// function get json from url
// by making HTTP POST or GET method
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method == "POST"){
// request method is POST
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}else if(method == "GET"){
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
return jObj;
}
这是我的NewPackageActivity.java，它获取要插入到数据库中的数据
package com.example.sqltest;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.NameValuePair;
import org.json.JSONObject;
import com.example.sqltest.JSONParser;
import java.util.ArrayList;
import java.util.List;
public class NewPackageActivity extends AppCompatActivity {
// Progress Dialog
private ProgressDialog pDialog;
JSONParser jsonParser = new JSONParser();
// url to create new product
private static String url_create_package = "http://govtracker.000webhostapp.com/create_package.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
EditText inputDateRec;
EditText inputNameTo;
EditText inputTrackingNum;
EditText inputNameFrom;
EditText inputDeliveredName;
EditText inputStatus;
private Button AddPackageDBBtn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_new_package);
AddPackageDBBtn = findViewById(R.id.AddPackageDBBtn);
//Edit Text
inputDateRec = (EditText) findViewById(R.id.DateReceivedTextput);
inputNameTo = (EditText) findViewById(R.id.nameToTextput);
inputTrackingNum = (EditText) findViewById(R.id.TrackingNumTextput);
inputNameFrom = (EditText) findViewById(R.id.NameFromTextput);
inputDeliveredName = (EditText) findViewById(R.id.DeliveredNameTextput);
inputStatus = (EditText) findViewById(R.id.StatusTextput);
//Implement onclick
AddPackageDBBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new CreateNewPackage().execute();
}
});
}
/**
* Background Async Task to Create new product
* */
class CreateNewPackage extends AsyncTask<String, String, String> {
/**
* Creating product
* */
@SuppressWarnings("deprecation")
protected String doInBackground(String... args) {
String dateRec = inputDateRec.getText().toString();
String nameTo = inputNameTo.getText().toString();
String trackingNum = inputTrackingNum.getText().toString();
String nameFrom = inputNameFrom.getText().toString();
String deliveredName = inputDeliveredName.getText().toString();
String status = inputStatus.getText().toString();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("dateReceived", dateRec));
params.add(new BasicNameValuePair("nameTo", nameTo));
params.add(new BasicNameValuePair("trackingNum", trackingNum));
params.add(new BasicNameValuePair("nameFrom", nameFrom));
params.add(new BasicNameValuePair("deliveredName", deliveredName));
params.add(new BasicNameValuePair("status", status));
// getting JSON Object
// Note that create package url accepts POST method
JSONObject json = jsonParser.makeHttpRequest(url_create_package,
"POST", params);
return null;
}
}
}
这是我的create_package.php
<?php
/*
* Following code will create a new package row
* All package details are read from HTTP Post Request
*/
//array for JSON response
$response = array();
//check required fields
if(isset($_POST['dateReceived']) && isset($_POST['nameTo']) && isset($_POST['trackingNum']) && isset($_POST['nameFrom']) && isset($_POST['deliveredName']) && isset($_POST['status'])){
$dateReceived = $_POST['dateReceived'];
$nameTo = $_POST['nameTo'];
$trackingNum = $_POST['trackingNum'];
$nameFrom = $_POST['nameFrom'];
$deliveredName = $_POST['deliveredName'];
$status = $_POST['status'];
// include db connect class
require_once __DIR__ . '/db_connect.php';
//connecting to db
$db = new DB_CONNECT();
//mysql inserting a new row
$result = mysql_query("INSERT INTO packages(dateReceived, nameTo, trackingNum, nameFrom, deliveredName, status)
VALUES('$deliveredDate', '$nameTo', '$trackingNum', '$nameFrom', '$deliveredName', '$status')");
// check if row inserted or not
if ($result) {
// successfully inserted into database
$response["success"] = 1;
$response["message"] = "Package successfully created.";
//echoing JSON response
echo json_encode($response);
} else {
//failed to insert row
$response["success"] = 0;
$response["message"] = "Oops! An error occurred.";
//echoing JSON response
echo json_encode($response);
}
}
?>
我想知道如何修复我的代码，但是我也知道我正在使用折旧的库，并且愿意遵循更新的教程来完成从android处理数据库的工作。任何帮助将不胜感激。