الطريقة تسمى مرتين في DatePicker

Question

انا استعمل ال datepickerdialog بسيطة Activity..وعندما DialogBox مغلق ، وسيتم تسمية الطريقة أدناه مرتين.

private void FetchData(String day, String month, int year)

لا أعرف لماذا تتصل هذه الطريقة مرتين عندما تظهر DatePickerDialog وقت واحد فقط؟

public class MainActivity extends Activity {
ListView listview;
Cursor smscursor;
SMS_SQL sql;
ListAdapter adapter;
final ArrayList<List> list = new ArrayList<List>();
private int year;
private int month;
String monthstr;
private int day;
String dayday, monthmonth;
ArrayList<String> smslist = new ArrayList<String>();
String PhoneNo = "1234567890";
static final int DATE_DIALOG_ID = 999;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.viewsms);
    ActionBar action = getActionBar();
    action.setDisplayHomeAsUpEnabled(true);
    action.setDisplayShowTitleEnabled(true);
    listview = (ListView) findViewById(R.id.listview);
    sql = new SMS_SQL(this);
    sql.Open();
    final Calendar c = Calendar.getInstance();
    year  = c.get(Calendar.YEAR);
    month = c.get(Calendar.MONTH);
    day   = c.get(Calendar.DAY_OF_MONTH);
    smscursor = sql.FetchSMS();
    while (smscursor.moveToNext()) {
        list.add(new List(smscursor.getString(smscursor
                .getColumnIndexOrThrow(SMS_SQL.SMS_TITLE)), smscursor
                .getString(smscursor
                        .getColumnIndexOrThrow(SMS_SQL.SMS_DATE)),
                smscursor.getInt(smscursor
                        .getColumnIndexOrThrow(SMS_SQL.SMS_ID)),
                smscursor.getString(smscursor
                        .getColumnIndexOrThrow(SMS_SQL.SMS_MESSAGE))));

    }
    adapter = new ListAdapter(this, R.layout.smsitem, list);
    adapter.setNotifyOnChange(true);
    listview.setAdapter(adapter);
}

@Override
protected Dialog onCreateDialog(int id) {
    switch (id) {
    case DATE_DIALOG_ID:
        // set date picker as current date
        return new DatePickerDialog(this, datePickerListener, year, month,
                day);
    }
    return null;
}

private DatePickerDialog.OnDateSetListener datePickerListener = new DatePickerDialog.OnDateSetListener() {

    // when dialog box is closed, below method will be called.
    public void onDateSet(DatePicker view, int selectedYear,
            int selectedMonth, int selectedDay) {
        year = selectedYear;
        month = selectedMonth;
        day = selectedDay;
        month++;
        if (day <= 9) {
            dayday = 0 + "" + day;
        } else {
            dayday = "" + day;
        }

        if (month <= 9) {
            monthmonth = 0 + "" + month;
        } else {
            monthmonth = "" + month;
        }
        FetchData(dayday, monthmonth, year);
    }

};

private void FetchData(String day, String month, int year) {
    // TODO Auto-generated method stub
    String date1 = day + "-" + month + "-" + year;
    Cursor sms = sql.fetchSmsByDate(date1);
    while (sms.moveToNext()) {
        smslist.add(sms.getString(sms
                .getColumnIndexOrThrow(SMS_SQL.SMS_MESSAGE)));

    }
    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);

    alertDialogBuilder
            .setTitle("Are you Sure To Send All This SMS To 1234567890..??");

    alertDialogBuilder
            .setMessage(
                    "If You Press Yes Then All Location Saved On this Date is Send..!!")
            .setCancelable(true);
    alertDialogBuilder.setPositiveButton("Yes",
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    sendit();
                    dialog.dismiss();
                }
            }).setNegativeButton("No",
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    dialog.dismiss();
                }
            });

    AlertDialog alertDialog = alertDialogBuilder.create();
    alertDialog.show();

}

private void sendit() {

    for (int i = 0; i < smslist.size(); i++) {
        sendSMS(PhoneNo, smslist.get(i));
    }
}

private void sendSMS(String phoneNumber, String message) {
    String SENT = "SMS_SENT";
    String DELIVERED = "SMS_DELIVERED";

    PendingIntent sentPI = PendingIntent.getBroadcast(this, 0, new Intent(
            SENT), 0);

    PendingIntent deliveredPI = PendingIntent.getBroadcast(this, 0,
            new Intent(DELIVERED), 0);

    // ---when the SMS has been sent---
    registerReceiver(new BroadcastReceiver() {
        @Override
        public void onReceive(Context arg0, Intent arg1) {
            switch (getResultCode()) {
            case Activity.RESULT_OK:
                Toast.makeText(getBaseContext(), "SMS sent",
                        Toast.LENGTH_SHORT).show();
                break;
            case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
                Toast.makeText(getBaseContext(), "Generic failure",
                        Toast.LENGTH_SHORT).show();
                break;
            case SmsManager.RESULT_ERROR_NO_SERVICE:
                Toast.makeText(getBaseContext(), "No service",
                        Toast.LENGTH_SHORT).show();
                break;
            case SmsManager.RESULT_ERROR_NULL_PDU:
                Toast.makeText(getBaseContext(), "Null PDU",
                        Toast.LENGTH_SHORT).show();
                break;
            case SmsManager.RESULT_ERROR_RADIO_OFF:
                Toast.makeText(getBaseContext(), "Radio off",
                        Toast.LENGTH_SHORT).show();
                break;
            }
        }
    }, new IntentFilter(SENT));

    // ---when the SMS has been delivered---
    registerReceiver(new BroadcastReceiver() {
        @Override
        public void onReceive(Context arg0, Intent arg1) {
            switch (getResultCode()) {
            case Activity.RESULT_OK:
                Toast.makeText(getBaseContext(), "SMS delivered",
                        Toast.LENGTH_SHORT).show();
                break;
            case Activity.RESULT_CANCELED:
                Toast.makeText(getBaseContext(), "SMS not delivered",
                        Toast.LENGTH_SHORT).show();
                break;
            }
        }
    }, new IntentFilter(DELIVERED));

    SmsManager sms = SmsManager.getDefault();
    sms.sendTextMessage(phoneNumber, null, message, sentPI, deliveredPI);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // TODO Auto-generated method stub

    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.main, menu);
    return super.onCreateOptionsMenu(menu);
}

@SuppressWarnings("deprecation")
@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // TODO Auto-generated method stub
    switch (item.getItemId()) {
    case android.R.id.home:
        Intent intent = new Intent(MainActivity.this, AddToDB.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(intent);
        return true;
    case R.id.Sync:
        showDialog(DATE_DIALOG_ID);
        return true;
    }
    return super.onOptionsItemSelected(item);
}
}

Answer 1

منذ جيليبيان ، onDateSet() طريقة DatePicker يسمى الفصل مرتين أي مرة واحدة عندما Ok يتم الضغط على الزر ثم عند DatePickerDialog تم رفضه. إنه "خطأ" معروف. يمكنك الحصول على حل بديل مثل هذا:-

int noOfTimesCalled = 0; في مستوى الفصل ثم استبدل onDateSet() الطريقة مع الكود أدناه:-

public void onDateSet(DatePicker view, int selectedYear,
            int selectedMonth, int selectedDay) {
    if(noOfTimesCalled%2==0) {
        year = selectedYear;
        month = selectedMonth;
        day = selectedDay;
        month++;
        if (day <= 9) {
            dayday = 0 + "" + day;
        } else {
            dayday = "" + day;
        }

        if (month <= 9) {
            monthmonth = 0 + "" + month;
        } else {
            monthmonth = "" + month;
        }
        FetchData(dayday, monthmonth, year);
    }
    noOfTimesCalled++;
}

يحرر:- مجرد لمعلوماتك. نفس الشيء مع TimePickerDialog أين onTimeSet() يسمى مرتين.