我想
如何发布项目ID的参数并获取json详细信息？
以下是我的代码：
（第一个活动）listview活动的一部分：
private void updateList() {
ListAdapter adapter = new SimpleAdapter(this, mCommentList,
R.layout.single_post, new String[] { TAG_TITLE, TAG_ADDRESS,
TAG_OPHOURS }, new int[] { R.id.title, R.id.address,
R.id.ophours });
setListAdapter(adapter);
// when the user clicks a list item
ListView lv = getListView();
lv.setSelector( R.drawable.listselector);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener(){
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//pass id of item
Intent r = new Intent(listview.this, Record.class);
Bundle b = new Bundle();
b.putString("key", TAG_ID);
r.putExtras(b);
startActivity(r);
}
}
);
}
（第二项活动）Record.class：
public class Record extends ListActivity
{
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
//testing on Emulator:
private static final String READ_SPECIFIC_RECORD_URL = "http://xxx.xxx.xx.xxx:8888/searchdb/record.php";
//JSON IDS:
private static final String TAG_SUCCESS = "success";
private static final String TAG_TITLE = "title";
private static final String TAG_POSTS = "posts";
private static final String TAG_ADDRESS = "address";
private static final String TAG_OPHOURS = "ophours";
private static final String TAG_CONTACT = "contact";
private static final String TAG_CONTACT2 = "contact2";
private static final String TAG_CAT = "cat";
private static final String TAG_BRAND = "brand";
private static final String TAG_COMPANY = "company";
private static final String TAG_RATINGS = "avrgrating";
//An array of all of our comments
private JSONArray mComments = null;
//manages all of our comments in a list.
private ArrayList<HashMap<String, String>> mCommentList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//note that use read_comments.xml instead of our single_post.xml
setContentView(R.layout.details);
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
//loading the comments via AsyncTask
new LoadRecords().execute();
}
/**
* Retrieves json data of comments
*/
/**
* Retrieves recent post data from the server.
*/
public void updateJSONdata() {
// Instantiate the arraylist to contain all the JSON data.
// we are going to use a bunch of key-value pairs, referring
// to the json element name, and the content, for example,
// message it the tag, and "I'm awesome" as the content..
Bundle b = getIntent().getExtras();
String id = b.getString("key");
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("id", id));
Log.d("request!", "starting");
//Posting user data to script
JSONObject json = jsonParser.makeHttpRequest(
READ_SPECIFIC_RECORD_URL, "POST", params);
// full json response
Log.d("Search attempt", json.toString());
mCommentList = new ArrayList<HashMap<String, String>>();
//when parsing JSON stuff, we should probably
//try to catch any exceptions:
try {
//I know I said we would check if "Posts were Avail." (success==1)
//before we tried to read the individual posts, but I lied...
//mComments will tell us how many "posts" or comments are
//available
mComments = json.getJSONArray(TAG_POSTS);
// looping through all posts according to the json object returned
for (int i = 0; i < mComments.length(); i++) {
JSONObject c = mComments.getJSONObject(i);
//gets the content of each tag
String title = c.getString(TAG_TITLE);
String address = c.getString(TAG_ADDRESS);
String ophours = c.getString(TAG_OPHOURS);
String contact = c.getString(TAG_CONTACT);
String contact2 = c.getString(TAG_CONTACT2);
String cat = c.getString(TAG_CAT);
String brand = c.getString(TAG_BRAND);
String company = c.getString(TAG_COMPANY);
String avrgrating = c.getString(TAG_RATINGS);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
map.put(TAG_TITLE, title);
map.put(TAG_ADDRESS, address);
map.put(TAG_OPHOURS, ophours);
map.put(TAG_CONTACT, contact);
map.put(TAG_CONTACT2, contact2);
map.put(TAG_CAT, cat);
map.put(TAG_BRAND, brand);
map.put(TAG_COMPANY, company);
map.put(TAG_RATINGS, avrgrating);
// adding HashList to ArrayList
mCommentList.add(map);
//annndddd, our JSON data is up to date same with our array list
}
} catch (JSONException e) {
e.printStackTrace();
}
}
/**
* Inserts the parsed data into our listview
*/
private void updateList() {
// For a ListActivity we need to set the List Adapter, and in order to do
//that, we need to create a ListAdapter. This SimpleAdapter,
//will utilize our updated Hashmapped ArrayList,
//use our single_post xml template for each item in our list,
//and place the appropriate info from the list to the
//correct GUI id. Order is important here.
ListAdapter adapter = new SimpleAdapter(this, mCommentList,
R.layout.single_record, new String[] { TAG_TITLE, TAG_ADDRESS,
TAG_OPHOURS, TAG_CONTACT, TAG_CONTACT2, TAG_CAT, TAG_BRAND, TAG_COMPANY, TAG_RATINGS },
new int[] { R.id.outletname, R.id.outletaddress, R.id.outletophours, R.id.outletcontact,
R.id.outletcontact2, R.id.outletcat, R.id.outletbrand, R.id.outletcompany, R.id.ratings});
// I shouldn't have to comment on this one:
setListAdapter(adapter);
// Optional: when the user clicks a list item we
//could do something. However, we will choose
//to do nothing...
}
public class LoadRecords extends AsyncTask<Void, Void, Boolean> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Record.this);
pDialog.setMessage("Loading details...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Boolean doInBackground(Void... arg0) {
//we will develop this method in version 2
updateJSONdata();
return null;
}
@Override
protected void onPostExecute(Boolean result) {
super.onPostExecute(result);
pDialog.dismiss();
//we will develop this method in version 2
updateList();
}
}
}
Read_specific_record_url php：
<?php
require("config.inc.php");
if (!empty($_POST)) {
$query_params = array(
$id = $_POST['id']
);
//initial query
$query = "SELECT * FROM `repairsvc` WHERE `id` = '".$id."'";
//execute query
try {
$stmt = $db->prepare($query);
$result = $stmt->execute($query_params);
}
catch (PDOException $ex) {
$response["success"] = 0;
$response["message"] = "Database Error!";
die(json_encode($response));
}
// Finally, we can retrieve all of the found rows into an array using fetchAll
$rows = $stmt->fetchAll();
if ($rows) {
$response["success"] = 1;
$response["posts"] = array();
foreach ($rows as $row) {
$post = array();
$post["title"] = $row["title"];
$post["address"] = $row["address"];
$post["ophours"] = $row["ophours"];
$post["contact"] = $row["phone 1"];
$post["contact2"] = $row["phone 2"];
$post["cat"] = $row["cat"];
$post["brand"] = $row["brand"];
$post["company"] = $row["company"];
$post["avrgrating"] = $row["avrgrating"];
//update our repsonse JSON data
array_push($response["posts"], $post);
}
// echoing JSON response
echo json_encode($response);
} else {
$response["success"] = 0;
$response["message"] = "Sorry, the record is unavailable now!";
die(json_encode($response));
}
} else {
?>
<h1>Search Records with ID</h1>
<form name="form1" action="record.php" method="post">
Enter Search:<br />
<input type="text" name="id" id="id" placeholder="Enter Record ID"/>
<br /><br />
<input type="submit" value="Search Now" name="completedsearch" />
</form>
<?php
}
?>