我有登录 Activity ,需要在 android 和 php mysql 之间进行连接,使用 jsn 从 php 获取响应,并使用 asynctask 在后台进行连接,但系统在 logcat 中显示响应为空。
日志猫
02-10 10:20:04.053: W/IInputConnectionWrapper(1797): showStatusIcon on inactive InputConnection
02-10 10:20:11.717: W/EGL_genymotion(1797): eglSurfaceAttrib not implemented
02-10 10:20:21.840: W/INbUFFERED Reader(1797): before the buffered reader beguin
02-10 10:20:21.844: W/INbUFFERED Reader(1797): the JsonObject is {"message":"No User found","success":0}
02-10 10:20:21.844: W/INbUFFERED Reader(1797): before the Parsing beguin
02-10 10:20:21.844: W/INbUFFERED 2 Reader(1797): the JsonObject is{"message":"No User found","success":0}
02-10 10:20:21.860: W/EGL_genymotion(1797): eglSurfaceAttrib not implemented
我认为问题出在 php 文件中,但我不知道在哪里,也没有找到它。
如果有人可以帮助我,我将不胜感激。
这是mysql中的表(这是一个测试)
-- Table structure for table `members`
--
CREATE TABLE IF NOT EXISTS `members` (
`id` int(10) NOT NULL AUTO_INCREMENT,
`user_name` varchar(255) NOT NULL,
`password` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=3 ;
--
-- Dumping data for table `members`
--
INSERT INTO `members` (`id`, `user_name`, `password`) VALUES
(1, 'cptjs', 'cpt'),
(2, 'lt_p_g', 'lt123');
db_config.php
<?php
$hostname_localhost ="localhost";
$database_localhost ="fil";
$username_localhost ="root";
$password_localhost ="";
$localhost = mysql_connect($hostname_localhost,$username_localhost,$password_localhost)
or
trigger_error(mysql_error(),E_USER_ERROR);
mysql_select_db($database_localhost, $localhost);
?>
检查.php
<?php
require_once('db_config.php');
// array for JSON response
$response = array();
if(isset($_GET['pid'])){
$pid = $_GET['pid'];
$query_search = "select * from members where id = '".$pid."'";
$query_exec = mysql_query($query_search) or die(mysql_error());
if (mysql_num_rows($query_exec)>0)
{
$result = mysql_fetch_array($query_exec);
$person = array();
$response["pid"]=$result["id"];
$person["username"]=$result["user_name"];
$person["password"]=$result["password"];
error_log(print_r($response, true));
// success
$response["success"] = 1;
// user node
$response["person"] = array();
array_push($response["person"], $person);
// echoing JSON response
echo json_encode($response);
}
else
{
error_log(print_r($response, true));
// no user found
$response["success"] = 0;
$response["message"] = "No User found";
error_log(print_r($response, true));
// echo no users JSON
echo json_encode($response);
}
}
else
{
// required field is missing
$response["success"] = 0;
$response["message"] = "Required field(s) are missing";
// echoing JSON response
echo json_encode($response);
}
?>
JSONParser.java
package pack.coderzheaven;
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;
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 == "POST") { // request method is POST //
* 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();
*
* }
*/
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 {
Log.w("INbUFFERED Reader", "before the buffered reader beguin");
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);
}
is.close();
json = sb.toString().substring(0, sb.toString().length() - 1);
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
Log.w("INbUFFERED Reader", "the JsonObject is " + jObj);
Log.w("INbUFFERED Reader", "before the Parsing beguin");
jObj = new JSONObject(json);
Log.w("INbUFFERED 2 Reader", "the JsonObject is" + jObj);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
AndroidPHPConnectionDemo.java
package pack.coderzheaven;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
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;
import android.widget.TextView;
public class AndroidPHPConnectionDemo extends Activity {
Button b;
EditText et, pass;
String Username, Password;
TextView tv;
HttpPost httppost;
StringBuffer buffer;
HttpResponse response;
HttpClient httpclient;
List<NameValuePair> nameValuePairs;
String pid;
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
// single person url
// ******************************************************************
// the localhost in the google android emulator = 10.0.2.2
// the localhost in the genymotion emulator = 10.0.3.2
// ******************************************************************
private static final String url_check_login = "http://10.0.3.2/check.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_PERSON = "person";
private static final String TAG_PID = "pid";
private static final String TAG_NAME = "username";
private static final String TAG_pass = "password";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
b = (Button) findViewById(R.id.Button01);
et = (EditText) findViewById(R.id.username);
pass = (EditText) findViewById(R.id.password);
tv = (TextView) findViewById(R.id.tv);
b.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// Getting complete person details in background thread
new CheckLogin().execute();
}
});
}
/**
* Background Async Task to Get complete person details
* */
class CheckLogin extends AsyncTask<String, String, String> {
JSONArray productObj;
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(AndroidPHPConnectionDemo.this);
pDialog.setMessage("Loading person details. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Getting person details in background thread
* */
@Override
protected String doInBackground(String... arg0) {
// updating UI from Background Thread
// Check for success tag
int success;
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("pid", pid));
// getting person details by making HTTP request
// Note that person details url will use GET request
JSONObject json = jsonParser.makeHttpRequest(url_check_login,
"GET", params);
//Log.e("JsonObject", json.toString());
// check your log for json response
// Log.d("Single person Details", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully received person details
productObj = json.getJSONArray(TAG_PERSON); // JSON Array
}
else {
// product with pid not found
}
} 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 got all details
if (productObj != null) {
try {
// get first product object from JSON Array
JSONObject person = productObj.getJSONObject(0);
et.setText(person.getString(TAG_NAME));
pass.setText(person.getString(TAG_pass));
Log.e("success in login", "SUCCESS IN LOGIN");
} catch (Exception e) {
e.printStackTrace();
}
}
pDialog.dismiss();
}
}
}
最佳答案
在您的 MySQL 表中,将 id 更改为 pid。现在,在您的 xml 文件中,创建一个 textview 并为其指定 pid 的 id 和“gone”的可见性。在代码中
b.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// Getting complete person details in background thread
new CheckLogin().execute();
}
在 public void onClick(View v) { 之后,输入 String pid = (TextView)v.findViewById(R.id.pid).getText().toString();……希望这有帮助
关于php - Android 系统与 php mysql 之间的连接但出现错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/21675085/