我的 json 解析器中有以下代码。我尝试从 iso-8859-1 更改为 utf-8。但我总是得到这个错误。我做错了什么？我无法弄清楚我做错了什么。
package com.iwantnew.www;
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 parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
我已经为我的数据库使用了 mysql。我是使用数据库的 android 新手。帮助PLZ！我的 php 文件如下所示：
<?php
/*
* Following code will create a new product row
* All product details are read from HTTP Post Request
*/1
// array for JSON response
$response = array();
// check for required fields
if (isset($_POST['quantity']) && isset($_POST['price']) && isset($_POST['descriptions'])) {
//$location = $_POST['location'];
$quantity = $_POST['quantity'];
$price = $_POST['price'];
//$productID = $_POST['area'];
$contact = $_POST['contact'];
$descriptions = $_POST['descriptions'];
// include db connect class
require_once __DIR__ . '/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
// mysql inserting a new row
$result = mysql_query("INSERT INTO room_tb(quantity, price,description) VALUES('$quantity', '$price','$descriptions')");
//$result1 = mysql_query("INSERT INTO users(userContactNumber) VALUES('$contact')");
// check if row inserted or not
if (($result)/*&& ($result1)*/) {
// successfully inserted into database
$response["success"] = 1;
$response["message"] = "Room added successfully.";
// echoing JSON response
echo json_encode($response);
} else {
// failed to insert row
$response["success"] = 0;
$response["message"] = "Oops! An error occurred.";
// echoing JSON response
echo json_encode($response);
}
} else {
// required field is missing
$response["success"] = 0;
$response["message"] = "Required field(s) is missing";
// echoing JSON response
echo json_encode($response);
}
?>
我的 java 文件看起来像这样..我在这里使用了 POST METHod。
package com.iwantnew.www;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class post_item extends Activity {
private ProgressDialog pDialog;
JSONParser jsonParser = new JSONParser();
Button add_room;
EditText contact_no;
EditText no_of_room;
EditText price_per_room;
EditText description;
private static String url_create_product = "http://10.0.2.2/android_iwant/android_add_room.php";
private static final String TAG_SUCCESS = "success";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.post_form);
//contact_no = (EditText) findViewById(R.id.contact_no);
no_of_room = (EditText) findViewById(R.id.no_of_room);
price_per_room = (EditText) findViewById(R.id.price_per_room);
description = (EditText) findViewById(R.id.description);
add_room = (Button) findViewById(R.id.add_room);
add_room.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// creating new product in background thread
new add_new_room().execute();
}
});
}
// suru...
class add_new_room extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(post_item.this);
pDialog.setMessage("Saving details..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Creating product
* */
protected String doInBackground(String... args) {
//String contact = contact_no.getText().toString();
String quantity = no_of_room.getText().toString();
String price = price_per_room.getText().toString();
String descriptions = description.getText().toString();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
//params.add(new BasicNameValuePair("contact", contact));
params.add(new BasicNameValuePair("quantity", quantity));
params.add(new BasicNameValuePair("price", price));
params.add(new BasicNameValuePair("descriptions", descriptions));
// getting JSON Object
// Note that create product url accepts POST method
JSONObject json = jsonParser.makeHttpRequest(url_create_product,
"POST", params);
// check log cat fro response
Log.d("Create Response", json.toString());
// check for success tag
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully created product
Intent i = new Intent(getApplicationContext(), MainActivity.class);
startActivity(i);
// closing this screen
finish();
} else {
// failed to create product
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog once done
pDialog.dismiss();
}
}
}