我正在办理登记表格。我有两个课程：ClientServer.java和JSONParser.java
ClientServer.java：
package com.example.mapsdemo;
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.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class Clientserver extends Activity {
EditText username,email,password;
Button signup,intent;
String mpostusername,mpostpassword,mpostemail;
private static final String TAG_SUCCESS = "success";
JSONParser jsonParser = new JSONParser();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_clientserver);
username = (EditText) findViewById(R.id.username);
email = (EditText) findViewById(R.id.email);
password = (EditText) findViewById(R.id.password);
signup = (Button)findViewById(R.id.signup);
intent = (Button)findViewById(R.id.go);
//Setup the Button's OnClickListener
signup.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//Get the data
new CreateNewAccount().execute();
Log.d("my", "in onclick...create new account executed");
}
});
intent.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent i = new Intent(Clientserver.this,MainActivity.class);
startActivity(i);
}
});
}
class CreateNewAccount extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
/**
* Creating product
* */
protected String doInBackground(String... args) {
Log.d("my", "in doInBackground()");
mpostusername = username.getText().toString();
mpostemail = email.getText().toString();
mpostpassword = password.getText().toString();
Log.d("my", "getting inputs is executed");
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("username",mpostusername));
params.add(new BasicNameValuePair("email",mpostemail));
params.add(new BasicNameValuePair("password",mpostpassword));
Log.d("my", "parameter adding executed");
JSONObject json = jsonParser.makeHttpRequest("http://<ip_address>/android_connect/register.php","POST", params);
if(json!=null){
// do something
Log.d("my", "http request made successfully");
try {
int success = json.getInt(TAG_SUCCESS);
Log.d("my", "JSON tag_success is working");
if (success == 1) {
Log.d("my", "in success=1");
// successfully created product
Intent i = new Intent(getApplicationContext(), MainActivity.class);
startActivity(i);
// closing this screen
finish();
} else {
Log.d("my", "In else");
}
} catch (JSONException e) {
e.printStackTrace();
}
}
return null;
}
}
}
JSONParser.java ：
package com.example.mapsdemo;
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 mehtod
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method.equals("POST")){
// request method is POST
// defaultHttpClient
Log.d("my", "method equals POST is working");
DefaultHttpClient httpClient = new DefaultHttpClient();
Log.d("my", "HTTp client is working");
HttpPost httpPost = new HttpPost(url);
Log.d("my", "HTTp post is working");
httpPost.setEntity(new UrlEncodedFormEntity(params));
Log.d("my", "url encoded");
HttpResponse httpResponse = httpClient.execute(httpPost);
Log.d("my", "HTTp response is working");
HttpEntity httpEntity = httpResponse.getEntity();
Log.d("my", "HTTp entity is working");
is = httpEntity.getContent();
Log.d("my", "getcontent is working");
}else if(method.equals("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;
}
}
db_connect.php
<?php
$connection = mysql_connect('http://xxx.xxx.xxx.xx/phpmyadmin', 'xxxx', 'xxxxx');
if (!$connection){
die("Database Connection Failed" . mysql_error());
}
$select_db = mysql_select_db('accountsb');
if (!$select_db){
die("Database Selection Failed" . mysql_error());
}
register.php
<?php
require('db_connect.php');
$response = array();
$username= $_POST['username'];
$email = $_POST['email'];
$password = $_POST['password'];
$query = "INSERT INTO `account` (username,email,password) VALUES ('$username', '$email', '$password')";
$result = mysql_query($query);
if($result){
$response["success"] = 1;
$response["message"] = "account successfully created.";
// echoing JSON response
echo json_encode($response);
}
else
{
$response["success"] = 0;
$response["message"] = "Oops! An error occurred.";
// echoing JSON response
echo json_encode($response);
}
?>
错误：
0-06 12：16：45.340：E / JSON Parser（8630）：解析数据时出错org.json.JSONException：Value
这是我的logcat过滤日志：
10-06 12:31:09.800: D/my(11813): in onclick...create new account executed
10-06 12:31:09.800: D/my(11813): in doInBackground()
10-06 12:31:09.800: D/my(11813): getting inputs is executed
10-06 12:31:09.800: D/my(11813): parameter adding executed
10-06 12:31:09.800: D/my(11813): method equals POST is working
10-06 12:31:09.800: D/my(11813): HTTp client is working
10-06 12:31:09.800: D/my(11813): HTTp post is working
10-06 12:31:09.800: D/my(11813): url encoded
10-06 12:31:12.090: D/my(11813): HTTp response is working
10-06 12:31:12.090: D/my(11813): HTTp entity is working
10-06 12:31:12.090: D/my(11813): getcontent is working
注意： 1.我在SO上看过很多类似的问题并尝试了很多解决方案，但是在尝试了大约2个小时后它没有用。所以，请不要将dulicate.plz标记为dulicate.plz帮助。
答案 0 :(得分：0)
尝试在您的PHP中放置isset以确保它们获得所有值（与所需字段一样工作）另外我认为问题出在您的查询中
$result = mysql_query("INSERT INTO accounts(email, password, username)
values ('$email','$password','$username')");
试试这个。此外，如果您的URL似乎是命令提示符中的问题，请使用ipconfig并获取最顶层的ipv4地址并将其作为您的端口。
答案 1 :(得分：0)
// Json Handler
public class ServiceHandler {
static String response = null;
public final static int GET = 1;
public final static int POST = 2;
public ServiceHandler() {
}
/**
* Making service call
* @url - url to make request
* @method - http request method
* */
public String makeServiceCall(String url, int method) {
return this.makeServiceCall(url, method, null);
}
/**
* Making service call
* @url - url to make request
* @method - http request method
* @params - http request params
* */
public String makeServiceCall(String url, int method,
List<NameValuePair> params) {
try {
// http client
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
// Checking http request method type
if (method == POST) {
HttpPost httpPost = new HttpPost(url);
// adding post params
if (params != null) {
httpPost.setEntity(new UrlEncodedFormEntity(params));
}
httpResponse = httpClient.execute(httpPost);
} else if (method == GET) {
// appending params to url
if (params != null) {
String paramString = URLEncodedUtils
.format(params, "utf-8");
url += "?" + paramString;
}
HttpGet httpGet = new HttpGet(url);
httpResponse = httpClient.execute(httpGet);
}
System.out.println("Status in url =====" + httpResponse.getStatusLine().getStatusCode());
httpEntity = httpResponse.getEntity();
response = EntityUtils.toString(httpEntity);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return response;
}
}