我正在尝试从我的Android应用程序向mysql数据库插入数据。我有这样的php文件代码:
<?php
// Connection data
$host = 'xxxx';;
$uname = 'xxx';
$pwd = 'xxx';
$db = 'xxxx';
$con = mysql_connect($host,$uname,$pwd) or die("connection failed");
mysql_select_db($db,$con) or die("db selection failed");
$nombre=$_REQUEST['nombre'];
$asunto=$_REQUEST['asunto'];
$comentario=$_REQUEST['comentario'];
$flag['code']=0;
if($r=mysql_query("insert into comentarios (nombre, asunto, comentario) values('$nombre','$asunto','$comentario') ",$con))
{
$flag['code']=1;
echo"hi";
}
print(json_encode($flag));
mysql_close($con);
?>
在我的Android应用程序中,我正在使用此代码:
class CreateNewComment extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MyActivity.this);
pDialog.setMessage("Enviando comentario..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Creating product
* */
protected String doInBackground(String... args) {
String nombre = inputnombre.getText().toString();
String asunto = inputasunto.getText().toString();
String comentario = inputcomentario.getText().toString();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("nombre", nombre));
params.add(new BasicNameValuePair("asunto", asunto));
params.add(new BasicNameValuePair("comentario", comentario));
// 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(), Comunidad.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();
}
}
}
我总是收到错误“无效的IP地址”,在控制台中我收到android.os.NetworkOnMainThreadException错误。感谢。
答案 0 :(得分:0)
尝试将代码放入Android中异步任务的doInBackground(...)
方法中。您的网络相关任务不应该在主线程上运行,doInBackgroung()
将在后台线程上运行您的任务,并以onPostExecute(...)
方法在主线程上发布结果,您可以在其中更新UI。
有关更多信息,请尝试以下链接: Make an HTTP request with android
答案 1 :(得分:0)
首先,不要使用mysql_*
api,其旧版已弃用,请使用 mysqli 或 PDO 。对于PHP脚本,您没有向客户端发送有效的json响应。
header('Content-type: application/json'); //put header
print(json_encode($flag));
mysql_close($con);
并且对于Android使用AsyncTask保持主UI线程免费。
您可以使用 Volley 这样的库来让您的生活更轻松。这将使网络呼叫变得非常容易
<强>更新强>
PHP with PDO
// Connection data
$host = 'xxxx';;
$uname = 'xxx';
$pwd = 'xxx';
$db = 'xxxx';
//Connect to DB using PDO
$db = new PDO('mysql:host='.$host.';dbname='.$db.';charset=utf8', $uname, $pwd);
$nombre = $_REQUEST['nombre'];
$asunto = $_REQUEST['asunto'];
$comentario = $_REQUEST['comentario'];
$flag['code']=0;
//Insert into DB
$stmt = $db->prepare("INSERT INTO comentarios
(nombre, asunto, comentario)
VALUES (:nombre, :asunto, :comentario)");
$stmt->execute(array(
':nombre' => $nombre,
':asunto' => $asunto,
':comentario' => $comentario
));
//Check for affected rows
if($stmt->rowCount() > 0) {
$flag['code']=1;
}
header('Content-type: application/json'); //put header for json
print(json_encode($flag));