我有一个应用程序通过php脚本从phpmyadmin读取Json数据并显示在列表活动中。单击商店名称后,将+1添加到该商店的投票计数中,并且应该将其发送回php服务器以在phpmyadmin中存储新的投票计数。选择后,我检查数据库投票计数值,它不会更新。虽然我在logcat中得到HTTP / 1.1 200 ok,但我认为数据没有被正确传递或接受。有人可以帮忙,我被困住了,没有方向。
Android代码:
public void writeJSON() {
String convertedID;
String convertedVote;
//convert int to string value to passed
convertedID = new Integer(selectedID).toString();
convertedVote = new Integer(selectedVote).toString();
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://10.0.2.2/kcstores.php");
try {
//writes the output to be stored in creolefashions.com/test2.php
ArrayList <NameValuePair> nvps = new ArrayList <NameValuePair>(2);
nvps.add(new BasicNameValuePair("storeUpdate", "update"));
nvps.add(new BasicNameValuePair("storeID", convertedID));
nvps.add(new BasicNameValuePair("storeVote", convertedVote));
httppost.setEntity(new UrlEncodedFormEntity(nvps));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
Log.i("writeJSON", response.getStatusLine().toString());
} catch(Exception e) {
Log.e("log_tag", "Error in http connection"+e.toString());
}
}
PHP代码:
<?php
$link = mysql_connect("localhost", "root", "") or die (mysql_error());
mysql_select_db("king_cake_stores")or die (mysql_error());
$query = "SELECT * FROM storeInfo";
$result = mysql_query($query);
$getUpdate = "noupdate";
if (isset($_POST['storeUpdate'])) {
echo "receiving data from app";
$getUpdate = $_POST['storeUpdate'];
$getStoreID = $_POST['storeID'];
$getStoreVote = $_POST['storeVote'];
}
// If command == getStoreID, it updates the table storeVote value
// with the android storeVote value based upon correct storeID
if ($getUpdate == "update") {
mysql_select_db("UPDATE storeInfo SET storeVote = $getStoreVote
WHERE storeID == $getStoreID");
} else {
// stores the data in an array to be sent to android application
while ($line = mysql_fetch_assoc($result)) $output[]=$line;
print(json_encode($output));
}
mysql_close($link);
?>
答案 0 :(得分:0)
我建议你从服务器端开始调试,然后开始向后工作。
首先,从HttpResponse开始记录响应文本。
回显你的php文件中的mysql查询文本,并确保它看起来像你期望的那样。
如果看起来正确,请检查您的数据库结构。
如果没有,请尝试执行var_dump($_POST)
,然后检查您的参数是否正确发送。
如果您执行这些步骤,您应该更好地了解问题所在。
答案 1 :(得分:0)
这可能不是整个问题,但是:
mysql_select_db("UPDATE storeInfo SET storeVote = $getStoreVote
WHERE storeID == $getStoreID");
那应该是mysql_query
。
答案 2 :(得分:0)
这里尝试使用PDO:
<?php
//Db Connection Class
Class db{
private static $instance = NULL;
private function __construct() {}
public static function getInstance($DBUSER,$DBPASS) {
if (!self::$instance){
try {
self::$instance = new PDO("mysql:host=localhost;dbname=king_cake_stores", $DBUSER, $DBPASS);
self::$instance->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}catch (Exception $e){
die('Cannot connect to mySQL server.');
}
}
return self::$instance;
}
private function __clone(){}
}
//Connect to PDO
$db = db::getInstance('username','password');
//Inser Update
if (isset($_POST['storeUpdate'])) {
try {
/*** UPDATE data ***/
$query = $db->prepare("UPDATE storeInfo
SET storeVote = :storeVote
WHERE storeID = :storeID");
$query->bindParam(':storeVote', $_POST['storeVote'], PDO::PARAM_STR);
$query->bindParam(':storeID', $_POST['storeID'], PDO::PARAM_INT);
/*** execute the prepared statement ***/
$query->execute();
}catch(PDOException $e){
echo $e->getMessage();
}
//Output Current
}else{
$result = $db->query('SELECT * FROM storeInfo')->fetchAll(PDO::FETCH_ASSOC);
echo json_encode($result);
}
/*** close the database connection ***/
$db = null;
?>
答案 3 :(得分:0)
在每个PHP命令后尝试使用or die
。也可以在Android中使用try catch块
这将减少代码中的错误。