我刚刚发现的错误来自以前的列表视图，未能通过IDS的正确价值观..我只是做了一些修改..所以这里是答案:) *如果万一有人需要从远程数据库填充的多级列表视图..
多级LISTVIEW第二级
public class History extends ListActivity{
private Button create, back;
private ProgressDialog pDialog;
private static final String READ_HISTORY_URL = "http://192.168.43.15:8080/DoctorScheduler/activities/history.php";
private static final String TAG_POST = "post";
private static final String TAG_DATE = "date";
private static final String TAG_DESC = "description";
private static final String TAG_ID = "remarks_id";
JSONParser jsonParser = new JSONParser();
JSONArray history = null;
String patient_id;
ArrayList<HashMap<String, String>> historyList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_history);
//get patient_id
Intent i = getIntent();
patient_id = i.getStringExtra("id");
//hashmap for history listview
historyList = new ArrayList<HashMap<String, String>>();
new LoadHistory().execute();
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// TODO Auto-generated method stub
// INSERT ALL PREVIOUS CONSULTATIONS OF THE PATIENT HERE
Intent viewhistory = new Intent(History.this, Singlehistory.class);
String pid = ((TextView) view.findViewById(R.id.txtPid)).getText().toString();
String rid = ((TextView) view.findViewById(R.id.txtRid)).getText().toString();
Toast.makeText(History.this, "patient_id: " + pid + ", remarks_id: " + rid, Toast.LENGTH_LONG).show();
viewhistory.putExtra("patient_id", pid);
viewhistory.putExtra("remarks_id", rid);
startActivity(viewhistory);
}
});
lv.setOnItemLongClickListener(new OnItemLongClickListener(){
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
Intent edithistory = new Intent(History.this, Edithistory.class);
String patient_id = ((TextView) view.findViewById(R.id.txtPid)).getText().toString();
String remarks_id = ((TextView) view.findViewById(R.id.txtRid)).getText().toString();
Toast.makeText(History.this, "p_id: " + patient_id + "r_id: " + remarks_id, Toast.LENGTH_LONG).show();
edithistory.putExtra("patient_id", patient_id);
edithistory.putExtra("remarks_id", remarks_id);
startActivity(edithistory);
return true;
}
});
create = (Button) findViewById(R.id.Addhistory);
create.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent i = new Intent(History.this, Addhistory.class);
String id = ((TextView) v.findViewById(R.id.txtRid)).getText().toString();
i.putExtra("id", id);
startActivity(i);
}
});
back = (Button) findViewById(R.id.BtnBack);
back.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
});
}
public void nextScreen(){
Intent i = new Intent(History.this, Addhistory.class);
String id = ((TextView) findViewById(R.id.txtRid)).getText().toString();
i.putExtra("id", id);
startActivity(i);
}
class LoadHistory extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
pDialog = new ProgressDialog(History.this);
pDialog.setMessage("Loading all patient consultations....");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected String doInBackground(String... args) {
// TODO Auto-generated method stub
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("patient_id", patient_id));
String json = jsonParser.getJSONFromURL(READ_HISTORY_URL, "GET", params);
Log.d("Response: ", json);
try{
JSONObject jObj = new JSONObject(json);
if(jObj!=null){
history = jObj.getJSONArray(TAG_POST);
if(history != null){
//looping through all patient's remarks
for(int i=0; i<history.length(); i++){
JSONObject c = history.getJSONObject(i);
//storing into json variable
//String id = c.getString(TAG_ID);
String remarks_id = c.getString(TAG_ID);
String date = c.getString(TAG_DATE);
String description = c.getString(TAG_DESC);
//creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
map.put("patient_id", patient_id);
map.put(TAG_ID, remarks_id);
map.put(TAG_DATE, date);
map.put(TAG_DESC, description);
historyList.add(map);
}
}else{
Log.d("History:", "null");
}
}
}catch(JSONException e){
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
//super.onPostExecute(result);
pDialog.dismiss();
ListAdapter adapter = new SimpleAdapter(
History.this, historyList, R.layout.mainhistory,
new String[] {"patient_id", TAG_ID, TAG_DATE, TAG_DESC},
new int[] {R.id.txtPid, R.id.txtRid, R.id.txtRdate, R.id.txtRdesc});
setListAdapter(adapter);
}
}
第三级LISTVIEW
public class Singlehistory extends Activity {
private ProgressDialog pDialog;
JSONParser jsonParser = new JSONParser();
JSONArray history = null;
String patient_id = null;
String remarks_id = null;
String date, diagnosis, medication, description;
private static final String SINGLE_HISTORY = "http://192.168.43.15:8080/DoctorScheduler/activities/singlehistory.php";
//json node
private static final String TAG_DATE = "date";
private static final String TAG_DIAGNOSIS = "diagnosis";
private static final String TAG_MEDICATION = "medication";
private static final String TAG_DESC = "description";
private static final String TAG_POST = "post";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_singlehistory);
Intent i = getIntent();
patient_id = i.getStringExtra("patient_id");
remarks_id = i.getStringExtra("remarks_id");
new LoadSingleHistory().execute();
}
class LoadSingleHistory extends AsyncTask<String, String, String>{
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
pDialog = new ProgressDialog(Singlehistory.this);
pDialog.setMessage("Loading patient information ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected String doInBackground(String... args) {
// TODO Auto-generated method stub
List<NameValuePair> params = new ArrayList<NameValuePair>();
// post patient id, remarks id as GET parameters
params.add(new BasicNameValuePair("patient_id", patient_id));
params.add(new BasicNameValuePair("remarks_id", remarks_id));
// getting JSON string from URL
String json = jsonParser.getJSONFromURL(SINGLE_HISTORY, "GET", params);
// Check your log cat for JSON response
Log.d("Single History JSON: ", json);
try {
JSONObject jObj = new JSONObject(json);
if(jObj != null){
history = jObj.getJSONArray(TAG_POST);
if(history != null){
for(int i=0; i<history.length(); i++){
JSONObject c = history.getJSONObject(i);
date = c.getString(TAG_DATE);
diagnosis = c.getString(TAG_DIAGNOSIS);
medication = c.getString(TAG_MEDICATION);
description = c.getString(TAG_DESC);
}
}
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
pDialog.dismiss();
TextView Date = (TextView) findViewById(R.id.txtDate);
TextView Diagnosis = (TextView) findViewById(R.id.txtDiagnosis);
TextView Medication = (TextView) findViewById(R.id.txtMedication);
TextView Description = (TextView) findViewById(R.id.txtDescription);
Date.setText(date);
Diagnosis.setText(diagnosis);
Medication.setText(medication);
Description.setText(description);
setTitle(TAG_DESC);
}
}
如何访问第三级数据..
require ("../config.inc.php");
$query = "SELECT * FROM remarks WHERE patient_id = :patient_id";
$query_params = array(':patient_id' => $_GET["patient_id"]);
try{
$stmt = $dbname->prepare($query);
$result = $stmt->execute($query_params);
$query = "SELECT * FROM remarks WHERE remarks_id = :remarks_id";
$query_params = array(':remarks_id' => $_GET["remarks_id"]);
$q = $dbname->prepare($query);
$r = $q->execute($query_params);
}catch(PDOException $ex){
$response["success"] = 0;
$response["message"] = $ex;
die(json_encode($response));
}
$rows = $stmt->fetchAll();
if($rows){
$response["post"] = array();
foreach($rows as $row){
$post = array();
$post["date"] = $row["date"];
$post["diagnosis"] = $row["diagnosis"];
$post["medication"] = $row["medication"];
$post["description"]= $row["description"];
array_push($response["post"], $post);
}
echo json_encode($response);
}
else{
$response["status"] = "FAIL";
$response["success"] = 0;
$response["message"] = "No available patient's record";
die(json_encode($response));
}
