我正在解决我遇到的这个问题。我试图允许用户将他们的Android应用程序中的一些数据上传到我开发的网站服务。
使用JSON和Android将数据上传到PHP Web服务,然后将数据“插入”我的PostgreSQL数据库。
由于应用程序在运行时没有产生错
请参阅下面我正在使用的代码,并尝试帮助确定我的错误。我在Google上寻找过教程,但它们都是基于从PHP Web服务读取数据到Android应用程序,但我希望从Android应用程序发送原始数据。
DataPost活动
public void postData() throws JSONException{
Toast.makeText(DataSummary.this, "Done! Check your profile online to see your record.", Toast.LENGTH_LONG).show();
Thread trd = new Thread(new Runnable(){
public void run(){
//Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://users.aber.ac.uk/dwd/mfb/php/jsonscript.php");
JSONObject json = new JSONObject();
Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(), i);
ByteArrayOutputStream bao = new ByteArrayOutputStream();
bitmapOrg.compress(Bitmap.CompressFormat.JPEG, 90, bao);
byte[] ba = bao.toByteArray();
String ba1=Base64.encodeToString(ba, i);
try {
//JSON data:
json.put("photo", ba1.toString());
json.put("name", name);
json.put("description", description);
json.put("latitude", latitude);
json.put("longitude", longitude);
json.put("project", project);
json.put("owner", username);
JSONArray postjson = new JSONArray();
postjson.put(json);
//Post the data
httppost.setHeader("json", json.toString());
httppost.getParams().setParameter("jsonpost", postjson);
//Execute HTTP Post Request
System.out.println(json);
HttpResponse response = httpclient.execute(httppost);
//for JSON
if(response != null)
{
InputStream is = response.getEntity().getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try{
while((line = reader.readLine()) != null){
sb.append(line + "\n");
}
} catch (IOException e){
e.printStackTrace();
} finally {
try {
is.close();
} catch(IOException e){
e.printStackTrace();
}
}
}
} catch(ClientProtocolException e){
e.printStackTrace();
} catch (IOException e){
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
trd.start();
}
PHP Webservice
<?php
session_start();
$conn = pg_connect("database_string");
//VARIABLES TO BE WRITTEN TO THE DATABASE
$photo = $_REQUEST["photo"];
echo $photo;
$binary=base64_decode($photo);
header('Content-Type: bitmap; charset=utf-8');
$name = json_decode(stripslashes($_POST["name"]));
$safe_name = pg_escape_string($name);
$desc = json_decode(stripslashes($_POST["description"]));
$safe_desc = pg_escape_string($desc);
$latitude = json_decode(stripslashes($_POST["latitude"]));
$longitude = json_decode(stripslashes($_POST["longitude"]));
$project = json_decode(stripslashes($_POST["project"]));
$owner = json_decode(stripslashes($_POST["owner"]));
$id = pg_query("SELECT * FROM users WHERE email = $owner");
$id_assoc = pg_fetch_assoc($id);
$id_res = $id_assoc['u_id'];
//SQL STATEMENT HERE FOR INSERT
$res = pg_query("INSERT INTO records (photo, name, description, latitude, longitude, project, owner) VALUES ('$photo', '$safe_name', '$safe_desc', '$latitude', '$longitude', '$project', '$id_res'");
pg_close($conn);
?>
任何能提供一些建议/教程/代码解决方案的人都会成为我书中的英雄!
答案 0 :(得分:1)
SELECT
查询是否会返回任何内容?我不是PHP专家,但对我来说,看起来你发送的变量是错误的,所以不应该:
$id = pg_query("SELECT * FROM users WHERE email = $owner");
但是
$id = pg_query("SELECT * FROM users WHERE email ='".$owner."'");
类似于INSERT查询。 其他想法:
SELECT *
它会慢一些。例如,在9.2中使用仅索引扫描,您可以直接从索引(电子邮件,ID)INSERT INTO records ( ... ,owner) VALUES (... ,(SELECT id FROM users WHERE email='".$owner."')")
您甚至可以在最后添加RETURNING owner
,以便在插入查询中获取所有者ID,如果您在其他地方需要它。