我几乎每周都在复习，但我仍然无法解决这个问题。我想查看listview中的项目，该项目是从datepicker的特定日期中选择的。
我这里有一个脚本，可以选择所有项目，但我想通过where子句查询它，并在应用程序中添加一些来自textview的日期。
get_all_dispatches.php
<?php
/*
* Following code will list all the products
*/
// array for JSON response
$response = array();
// include db connect class
$filepath = realpath (dirname(__FILE__));
require_once($filepath."/db_connect.php");
// connecting to db
$db = new DB_CONNECT();
// get all products from products table
$result = mysql_query("SELECT * FROM dispatches") or die(mysql_error());
// check for empty result
if (mysql_num_rows($result) > 0) {
// looping through all results
// dispatches node
$response["dispatches"] = array();
while ($row = mysql_fetch_array($result)) {
// temp user array
$dispatches = array();
$dispatches["ticket_no"] = $row["ticket_no"];
$dispatches["status"] = $row["status"];
$dispatches["branch_code"] = $row["branch_code"];
$dispatches["reported_by"] = $row["reported_by"];
$dispatches["reported_on"] = $row["reported_on"];
$dispatches["reported_date"] = $row["reported_date"];
$dispatches["problem"] = $row["problem"];
$dispatches["created_by"] = $row["created_by"];
// push single product into final response array
array_push($response["dispatches"], $dispatches);
}
// success
$response["success"] = 1;
// echoing JSON response
echo json_encode($response);
} else {
// no products found
$response["success"] = 0;
$response["message"] = "No dispatch found";
// echo no users JSON
echo json_encode($response);
}
?>
SchedulerActivity.java Datepicker类
public class SchedulerActivity extends Activity {
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
private TextView Output;
private Button changeDate, btnNext, btnBack;
private int year;
private int month;
private int day;
static final int DATE_PICKER_ID = 1111;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.scheduler);
Output = (TextView) findViewById(R.id.Output);
changeDate = (Button) findViewById(R.id.changeDate);
btnNext = (Button) findViewById(R.id.btnNext);
btnBack = (Button) findViewById(R.id.btnBack);
// Get current date by calender
final Calendar c = Calendar.getInstance();
year = c.get(Calendar.YEAR);
month = c.get(Calendar.MONTH);
day = c.get(Calendar.DAY_OF_MONTH);
final String[] MONTHS = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
// Show current date
Output.setText(new StringBuilder()
// Month is 0 based, just add 1
.append(year).append("-").append(MONTHS[month]).append("-").append(day));
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
// Button listener to show date picker dialog
changeDate.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// On button click show datepicker dialog
showDialog(DATE_PICKER_ID);
}
});
btnBack.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// starting background task to update product
Intent myIntent= new Intent(SchedulerActivity.this, MainScreenActivity.class);
startActivity(myIntent);
}
});
btnNext.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// starting background task to send date
String dataToPass = Output.getText().toString();
Intent intent= new Intent(SchedulerActivity.this, AllProductsActivity.class);
intent.putExtra("repdate", dataToPass);
startActivity(intent);
}
});
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_PICKER_ID:
// open datepicker dialog.
// set date picker for current date
// add pickerListener listner to date picker
return new DatePickerDialog(this, pickerListener, year, month,day);
}
return null;
}
private DatePickerDialog.OnDateSetListener pickerListener = new DatePickerDialog.OnDateSetListener() {
// when dialog box is closed, below method will be called.
@Override
public void onDateSet(DatePicker view, int selectedYear,
int selectedMonth, int selectedDay) {
year = selectedYear;
month = selectedMonth;
day = selectedDay;
final String[] MONTHS = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
// Show selected date
Output.setText(new StringBuilder().append(year).append("-").append(MONTHS[month])
.append("-").append(day));
}
};
}
AllProductsActivity.java 这包含listview
public class AllProductsActivity extends ListActivity {
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> dispatchlist;
// url to get all products list
private static String url_all_dispatches = "http://pacificsunsolution.net84.net/get_all_dispatches.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_DISPATCHES = "dispatches";
private static final String TAG_TICKETNO = "ticket_no";
private static final String TAG_REPDATE = "reported_date";
private static final String TAG_BRCODE = "branch_code";
// products JSONArray
JSONArray dispatches = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.all_products);
Button btnBack;
btnBack = (Button) findViewById(R.id.btnBack);
// Hashmap for ListView
dispatchlist = new ArrayList<HashMap<String, String>>();
// Loading products in Background Thread
new LoadAllProducts().execute();
// Get listview
ListView lv = getListView();
btnBack.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// starting background task to update product
Intent myIntent= new Intent(AllProductsActivity.this, SchedulerActivity.class);
startActivity(myIntent);
}
});
// on seleting single product
// launching Edit Product Screen
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String pid = ((TextView) view.findViewById(R.id.pid)).getText()
.toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(),
EditProductActivity.class);
// sending pid to next activity
in.putExtra(TAG_TICKETNO, pid);
// starting new activity and expecting some response back
startActivityForResult(in, 100);
}
});
}
// Response from Edit Product Activity
@Override
protected 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 = getIntent();
finish();
startActivity(intent);
}
}
/**
* Background Async Task to Load all product by making HTTP Request
* */
class LoadAllProducts extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(AllProductsActivity.this);
pDialog.setMessage("Loading dispatches. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All products from url
* */
protected String doInBackground(String... args) {
//getting date from datepicker
TextView repdate;
repdate = (TextView) findViewById(R.id.Date);
String dataToCollect;
Intent intent = getIntent();
dataToCollect = intent.getStringExtra("repdate");
repdate.setText(dataToCollect);
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url_all_dispatches, "GET", params);
// Check your log cat for JSON reponse
Log.d("All Products: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Products
dispatches = json.getJSONArray(TAG_DISPATCHES);
// looping through All Products
for (int i = 0; i < dispatches.length(); i++) {
JSONObject c = dispatches.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_TICKETNO);
String name = c.getString(TAG_BRCODE);
String date = c.getString(TAG_REPDATE);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_TICKETNO, id);
map.put(TAG_BRCODE, name);
map.put(TAG_REPDATE, date);
// adding HashList to ArrayList
dispatchlist.add(map);
}
} else {
// no products found
// Launch Add New product Activity
Intent i = new Intent(getApplicationContext(),
NewProductActivity.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();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
AllProductsActivity.this, dispatchlist,
R.layout.list_item, new String[] { TAG_TICKETNO,
TAG_BRCODE, TAG_REPDATE},
new int[] { R.id.pid, R.id.name, R.id.date});
// updating listview
setListAdapter(adapter);
}
});
}
}
}
对不起，很长的帖子。我在祈祷，所以你可以帮助我！ ：）