我使用php创建了一个数据库并连接到android，现在我删除表中一行的方法无效。我在这里使用JSON填充我的列表。这是我的代码，如果有人可以帮助我：
包含所有项目列表的活动：
var str= "likeThis"删除方法的活动：
public class QuestsFragment extends Fragment {
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> questsList;
// url to get all products list
private static String url_all_quests = "http://192.168.0.17:8081/geomondo/get_all_quests.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_QUESTS = "quests";
private static final String TAG_QID = "qid";
private static final String TAG_TITLE = "title";
private static final String TAG_DESCRIPTION = "description";
private static final String TAG_DISTRICT = "district";
private static final String TAG_CODE = "code";
private ListView listView;
// quests JSONArray
JSONArray quests = null;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.quests, container, false);
// Hashmap for ListView
questsList = new ArrayList<HashMap<String, String>>();
listView = (ListView) rootView.findViewById(R.id.list);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// getting values from selected ListItem
String send_qid = ((TextView) view.findViewById(R.id.qid)).getText()
.toString();
String send_title = ((TextView) view.findViewById(R.id.title))
.getText().toString();
String send_description = ((TextView) view.findViewById(R.id.desc))
.getText().toString();
String send_district = ((TextView) view.findViewById(R.id.district))
.getText().toString();
String send_code = ((TextView) view.findViewById(R.id.code))
.getText().toString();
Intent send_values = new Intent(getActivity(), QuestsSingleActivity.class);
send_values.putExtra(TAG_QID, send_qid);
send_values.putExtra(TAG_TITLE, send_title);
send_values.putExtra(TAG_DESCRIPTION, send_description);
send_values.putExtra(TAG_DISTRICT, send_district);
send_values.putExtra(TAG_CODE, send_code);
startActivity(send_values);
getActivity().overridePendingTransition(R.anim.slide_in, R.anim.slide_in_out);
// starting new activity and expecting some response back
startActivityForResult(send_values, 100);
}
});
// Loading quests in Background Thread
new LoadAllQuests().execute();
return rootView;
}
// Response from Edit Quest Activity
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// if result code 100
if (resultCode == 100) {
// if result code 100 is received
// means user edited/deleted product
// reload this screen again
Intent intent = getActivity().getIntent();
getActivity().startActivity(intent);
}
}
/**
* Background Async Task to Load all quest by making HTTP Request
* */
class LoadAllQuests extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(getActivity());
pDialog.setMessage("Loading quests. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All quests from url
* */
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url_all_quests, "GET", params);
// Check your log cat for JSON reponse
Log.d("All Quests: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Quests
quests = json.getJSONArray(TAG_QUESTS);
// looping through All Quests
for (int i = 0; i < quests.length(); i++) {
JSONObject c = null;
try {
c = quests.getJSONObject(i);
} catch (JSONException e) {
e.printStackTrace();
}
// Storing each json item in variable
String id = c.getString(TAG_QID);
String title = c.getString(TAG_TITLE);
String description = c.getString(TAG_DESCRIPTION);
String district = c.getString(TAG_DISTRICT);
String code = c.getString(TAG_CODE);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_QID, id);
map.put(TAG_TITLE, title);
map.put(TAG_DESCRIPTION, description);
map.put(TAG_DISTRICT, district);
map.put(TAG_CODE, code);
// adding HashList to ArrayList
questsList.add(map);
}
} else {
// no products found
// Launch Quest Single Activity
Intent i = new Intent(getActivity(),
QuestsSingleActivity.class);
// Closing all previous activities
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// here you check the value of getActivity() and break up if needed
if(getActivity() == null)
return;
// updating UI from Background Thread
getActivity().runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
getActivity(), questsList,
R.layout.quests_row, new String[]{TAG_QID,
TAG_TITLE, TAG_DESCRIPTION, TAG_DISTRICT, TAG_CODE},
new int[]{R.id.qid, R.id.title, R.id.desc, R.id.district, R.id.code});
// updating listview
listView.setAdapter(adapter);
}
});
}
}
}
如果我需要为php文件添加更多代码，请告诉我。我会在这里给你一些帮助。