Develop Reference

Android: DatePicker value saved in a variable doesn't go in onCreate

I have a rather simple issue but this is bugging me out!
I am trying to build an app in which I have 2 DatePickers, periodFrom and periodTo.
Basically what I'm trying to do is let the user pick dates on both cases and then calculate the difference between dates in days. I already know how to get the difference, how to get the date from the DatePicker. The problem is I don't know where I should get the value from the DatePicker, as my onCreate intializes the listener for the DatePickers but it doesn't store the set dates in the global variables, only the current date which it gets from Calendar.getInstance();
Here is my code for the MainActivity, maybe you can enlighten me on this issue I'm having. Thank you!
MainActivity.class
package com.endtech.utilitycalculator;
import android.app.DatePickerDialog;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.DatePicker;
import android.widget.EditText;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Locale;
public class MainActivity extends AppCompatActivity {
private EditText periodFrom, periodTo;
private Calendar mCalendarFrom = Calendar.getInstance();
private Calendar mCalendarTo = Calendar.getInstance();
private long from, to;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
periodFrom = (EditText) findViewById(R.id.periodFrom);
periodTo = (EditText) findViewById(R.id.periodTo);
initListeners();
from = mCalendarFrom.getTimeInMillis(); //This is current time, not the set time
to = mCalendarTo.getTimeInMillis(); //This is current time, not the set time
}
private void initListeners() {
setDateFrom();
setDateTo();
}
private void setDateFrom() {
final DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {
#Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
mCalendarFrom.set(Calendar.YEAR, year);
mCalendarFrom.set(Calendar.MONTH, monthOfYear);
mCalendarFrom.set(Calendar.DAY_OF_MONTH, dayOfMonth);
updateLabelFrom();
}
};
periodFrom.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
new DatePickerDialog(MainActivity.this, date, mCalendarFrom.get(Calendar.YEAR),
mCalendarFrom.get(Calendar.MONTH), mCalendarFrom.get(Calendar.DAY_OF_MONTH)).show();
}
});
}
private void updateLabelFrom() {
String mFormat = "dd/MM/yyyy";
SimpleDateFormat sdf = new SimpleDateFormat(mFormat, Locale.GERMANY);
periodFrom.setText(sdf.format(mCalendarFrom.getTime()));
}
private void setDateTo() {
final DatePickerDialog.OnDateSetListener date2 = new DatePickerDialog.OnDateSetListener() {
#Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
mCalendarTo.set(Calendar.YEAR, year);
mCalendarTo.set(Calendar.MONTH, monthOfYear);
mCalendarTo.set(Calendar.DAY_OF_MONTH, dayOfMonth);
updateLabelTo();
}
};
periodTo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
new DatePickerDialog(MainActivity.this, date2, mCalendarTo.get(Calendar.YEAR),
mCalendarTo.get(Calendar.MONTH), mCalendarTo.get(Calendar.DAY_OF_MONTH)).show();
}
});
}
private void updateLabelTo() {
String mFormat = "dd/MM/yyyy";
SimpleDateFormat sdf = new SimpleDateFormat(mFormat, Locale.GERMANY);
periodTo.setText(sdf.format(mCalendarTo.getTime()));
}
}

The problem is you are getting the dates before selecting them.
Simply Create a button (when you click on the button then the process of converting difference into days get done). then on button click get the values of dates and then convert it into days.
Let me know if you find some problem by commenting below.

Getting data from a DatePickerDialog to a fragment

As above I am trying to work out how to pass back the date selected by the user. I have worked out how to get the date selected by using the onDateSet method but I do not know how to feed this back to the parent fragment, and then set the EditText text to the date selected.
package com.example.androidvehicle;
import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
public class fragmentServicing extends Fragment {
callBack mCallBack;
Button mot;
Button servicing;
Button tax;
EditText txtService;
final int Date_Dialog_ID=0;
int cDay,cMonth,cYear; // this is the instances of the current date
Calendar cDate;
int sDay,sMonth,sYear; // this is the instances of the entered date
int id_dialog = 1;
int yr, day, month = 0;
// interfacing back to activity
public interface callBack
{
public void onItemSelected(String id);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_servicing, container, false);
txtService = (EditText) view.findViewById(R.id.txtServiceDate);
mot = (Button) view.findViewById(R.id.buttonMOT);
servicing = (Button) view.findViewById(R.id.buttonService);
servicing.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// this will then pass back to the activity the string hello
mCallBack.onItemSelected("hello");
getActivity().showDialog(1);
}
});
mot.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
getActivity().showDialog(1);
}
});
return view;
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
// This makes sure that the container activity has implemented
// the callback interface. If not, it throws an exception
try {
mCallBack = (callBack) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnHeadlineSelectedListener");
}
}
// this is an override for when the dialog is created
protected Dialog onCreateDialog(int id)
{
switch(id)
{
// this will return a date picker dialog if 1 is passed
// could use another number for another dialog
case 1:
// passes it the current date
return new DatePickerDialog(getActivity(), mDateSetListener, yr, month, day);
}
return null;
}
// this returns the date back that has been selected by the user
private DatePickerDialog.OnDateSetListener mDateSetListener =
new DatePickerDialog.OnDateSetListener() {
#Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
yr = year;
month = monthOfYear;
day = dayOfMonth;
Log.d("date selected", "year "+ yr+ " month " +month+" day "+day);
}
};
}

You can set DateListner on Edittext onClicklistner..
import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.TextView;
public class DateListener implements OnClickListener, OnDateSetListener {
private Activity activity;
private int year;
private int monthOfYear;
private int dayOfMonth;
private View touchedView;
public DateListener(Activity activity) {
this.activity = activity;
final Calendar c = Calendar.getInstance();
this.year = c.get(Calendar.YEAR);
this.monthOfYear = c.get(Calendar.MONTH);
this.dayOfMonth = c.get(Calendar.DAY_OF_MONTH);
}
public int getYear() {
return year;
}
public int getMonth() {
return monthOfYear;
}
public int getDay() {
return dayOfMonth;
}
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
this.year = year;
this.monthOfYear = monthOfYear + 1;
this.dayOfMonth = dayOfMonth;
updateDisplay();
updateEditText();
}
#Override
public void onClick(View v) {
touchedView = v;
new DatePickerDialog(activity,
this, this.getYear(), this.getMonth(), this.getDay()).show();
}
private void updateDisplay() {
((TextView) touchedView).setText(
new StringBuilder()
.append(pad(dayOfMonth)).append(".")
.append(pad(monthOfYear)).append(".")
.append(pad(year)));
}
private void updateEditText() {
((EditText) touchedView).setText(
new StringBuilder()
.append(pad(dayOfMonth)).append(".")
.append(pad(monthOfYear)).append(".")
.append(pad(year)));
}
private static String pad(int c) {
if (c >= 10)
return String.valueOf(c);
else
return "0" + String.valueOf(c);
}
}
In Your Fragment
DateListener dateListener = new DateListener(getActivity());
edittext.setOnClickListener(dateListener);

My child Activity does not send result back to parent

I am attempting to create a ToDo list for a class that I am in, and how I have the app is that I have an EditText on top to enter an item in the TDL. and then I am using an extended tablelayout to display the items. I also have a button that calls to a second activity that then has 2 other buttons to get the time and date to (hopefully) display on the TDL item after I hit the Done button on the button (where I would like to go back to the main activity) So far I am testing this on an AVD.
So what I think my issue is that I dont think my second activity is passing back the info that I want. According to the debugger, the onActivityResults method from the first one gets called earlier than the second activity gets called.
Here is the first Activity:
package com.parrishb.todo;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.view.KeyEvent;
import android.view.View;
import android.widget.EditText;
import android.widget.Button;
public class ToDoActivity extends Activity {
SharedPreferences pref;
public final static int ACTIVITY =1;
public static Globals g;
public ToDoView tdv;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_to_do);
final EditText myEditText = (EditText)findViewById(R.id.myEditText);
Button mPickDate = (Button) findViewById(R.id.pickDate);
tdv = (ToDoView)findViewById(R.id.tdv);
myEditText.setOnKeyListener(new View.OnKeyListener() {
public boolean onKey(View v, int keyCode, KeyEvent event) {
if(event.getAction()== KeyEvent.ACTION_DOWN){
if((keyCode == KeyEvent.KEYCODE_DPAD_CENTER) || (keyCode == KeyEvent.KEYCODE_ENTER)){
tdv.addRow(ToDoActivity.this, myEditText.getText().toString());
myEditText.setText("");
return true;
}
}
return false;
}
});
// CLick listener for the date/time button
mPickDate.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivityForResult(new Intent(ToDoActivity.this, DatePickerActivity.class), ACTIVITY);
}
});
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data){
super.onActivityResult(requestCode, resultCode, data);
if(resultCode== RESULT_OK && requestCode== ACTIVITY){
String append= (new StringBuilder().append(data.getStringExtra("Time"))
.append(" ").append(data.getStringExtra("Date")).toString());
tdv.editRow(ToDoActivity.this, append);
}
}
}
Here is my second activity:
package com.parrishb.todo;
import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;
import android.widget.TimePicker;
public class DatePickerActivity extends Activity {
private TextView mDateDisplay;
private Button mPickDate;
private int mYear;
private int mMonth;
private int mDay;
private TextView mTimeDisplay;
private Button mPickTime;
private Button done;
private int mhour;
private int mminute;
static final int TIME_DIALOG_ID = 1;
static final int DATE_DIALOG_ID = 0;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.buttonclick);
mDateDisplay =(TextView)findViewById(R.id.date);
mPickDate =(Button)findViewById(R.id.datepicker);
mTimeDisplay = (TextView) findViewById(R.id.time);
mPickTime = (Button) findViewById(R.id.timepicker);
done = (Button)findViewById(R.id.done);
//Pick time's click event listener
mPickTime.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
showDialog(TIME_DIALOG_ID);
}
});
//PickDate's click event listener
mPickDate.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
showDialog(DATE_DIALOG_ID);
}
});
done.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//DatePickerActivity.this.finishActivityFromChild(DatePickerActivity.this, ToDoActivity.ACTIVITY);
//finishActivity(ToDoActivity.ACTIVITY);
//return;
//DatePickerActivity.this.finish(ToDoActivity.ACTIVITY);
//finish();
DatePickerActivity.this.finish();
}
});
final Calendar c = Calendar.getInstance();
mYear = c.get(Calendar.YEAR);
mMonth = c.get(Calendar.MONTH);
mDay = c.get(Calendar.DAY_OF_MONTH);
mhour = c.get(Calendar.HOUR_OF_DAY);
mminute = c.get(Calendar.MINUTE);
}
#Override
public void finish(){
Intent resultIntent = new Intent();
Bundle b = new Bundle();
b.putString("Date", mDateDisplay.getText().toString());
b.putString("Time", mTimeDisplay.getText().toString());
resultIntent.putExtras(b);
setResult(Activity.RESULT_OK, resultIntent);
super.finish();
}
//-------------------------------------------update date----------------------------------------//
private void updateDate() {
mDateDisplay.setText(
new StringBuilder()
// Month is 0 based so add 1
.append(mMonth + 1).append("/")
.append(mDay).append("/")
.append(mYear).append(" "));
}
//-------------------------------------------update time----------------------------------------//
public void updatetime()
{
mTimeDisplay.setText(
new StringBuilder()
.append(pad(mhour)).append(":")
.append(pad(mminute)));
}
private static String pad(int c) {
if (c >= 10)
return String.valueOf(c);
else
return "0" + String.valueOf(c);
}
//Datepicker dialog generation
private DatePickerDialog.OnDateSetListener mDateSetListener =
new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int year,
int monthOfYear, int dayOfMonth) {
mYear = year;
mMonth = monthOfYear;
mDay = dayOfMonth;
updateDate();
}
};
// Timepicker dialog generation
private TimePickerDialog.OnTimeSetListener mTimeSetListener =
new TimePickerDialog.OnTimeSetListener() {
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
mhour = hourOfDay;
mminute = minute;
updatetime();
}
};
#Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_DIALOG_ID:
return new DatePickerDialog(this,
mDateSetListener,
mYear, mMonth, mDay);
case TIME_DIALOG_ID:
return new TimePickerDialog(this,
mTimeSetListener, mhour, mminute, true);
}
return null;
}
}

I had scratched the second activity and brought the date and time picker into the main activity.

How to set the date from DatePicker dialog for multiple calls

Good day, can't seem to find a solution for this. i have 2 buttons that when pressed, opens a datepickerdialog, but my problem now is , how can i set them to the appropriate button on OnDateSet method. I am using a DialogFragment for the date and then implementing the DateListener in my activity. I have tried using getTag() but no success in getting the tag. here is what i tried:
public void showfromDatePickerDialog(View v) {
DialogFragment dateFragment = new DateDialogFragment();
dateFragment.show(getSupportFragmentManager(), "fromdatePicker");
}
public void showtoDatePickerDialog(View v) {
DialogFragment dateFragment = new DateDialogFragment();
dateFragment.show(getSupportFragmentManager(), "todatePicker");
}
public void onDateSet(DatePicker view, int year, int month, int day) {
StringBuilder builder = new StringBuilder();
builder.append(day).append("-")
.append(month).append("-")
.append(year);
String text= builder.toString();
if(view.getTag().toString().equals("fromdatePicker")) { // error here
Log.d(TAG, "got here" + text);
fromdate.setText(text);
}
if(view.getTag() == "todatePicker") {
todate.setText(text);
}
any ideas how to implement this? i keep seeing solutions about using 2 different DialogFragment class but am guessing there should be another way. or am i wrong? Thank you

ok, i have a work around for these. which can be helpful for anyone with this problem. if its slightly incorrect please let me know and i can change it. but this is what i did to solve this issue.
in on DateSet:
public void onDateSet(DatePicker view, int year, int month, int day) {
StringBuilder builder = new StringBuilder();
builder.append(day).append("-")
.append(month).append("-")
.append(year);
String text= builder.toString();
FragmentManager fragmanager = getSupportFragmentManager();
if(fragmanager.findFragmentByTag("fromdatePicker") != null) {
Log.d(TAG, "got here" + text);
fromdate.setText(text);
}
// if(view.getTag() == "todatePicker") {
if(fragmanager.findFragmentByTag("todatePicker") != null) {
todate.setText(text);
}
that way you can use the same dateListener for multiple calls and set the date appropriately based on the tag that was passed when calling show on the dialog.

Use below code of DatePicker Dialog.
private int mYear;
private int mMonth;
private int mDay;
Calendar cal4DatePicker = Calendar.getInstance();
Button btnDOB=findviewbyId(R.id.btndob);
private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
mYear = year;
mMonth = monthOfYear;
mDay = dayOfMonth;
cal4DatePicker.set(Calendar.YEAR, mYear);
cal4DatePicker.set(Calendar.MONTH, mMonth);
cal4DatePicker.set(Calendar.DAY_OF_MONTH, mDay);
btnDOB.setText(new StringBuilder()
.append(mDay).append("-").append(mMonth).append("-").append(mYear).append(" "));
}
};
on btnDOB you need to set click listner to show this DatePicker Dialog.

I have try same thing with Time Picker only. You can try out and set same for date picker also.
package com.example.toolboxtest;
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TimePicker;
public class MainActivity extends FragmentActivity implements OnClickListener {
Button testBtn;
EditText testET;
static final int TIME_DIALOG_ID = 0;
int mHour = 0;
int mMinute = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
testBtn = (Button) findViewById(R.id.testBTn);
testET = (EditText) findViewById(R.id.testET);
testBtn.setOnClickListener(this);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public void onClick(View v) {
switch(v.getId()){
case R.id.testBTn:
showDialog(TIME_DIALOG_ID);
break;
}
}
private TimePickerDialog.OnTimeSetListener mTimeSetListener = new TimePickerDialog.OnTimeSetListener() {
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
mHour=hourOfDay;
mMinute = minute;
// myPrefs = ImportantDateReminderActivity.this.getSharedPreferences("myPrefs",MODE_WORLD_WRITEABLE);
// prefsEditor = myPrefs.edit();
// prefsEditor.putInt("hour", mHour);
// prefsEditor.putInt("minute", mMinute);
// prefsEditor.putString("a", a);
// prefsEditor.commit();
if(mHour==12){
//reminderSetTime.setText(new StringBuilder().append("12").append(":").append((minute)+" PM"));
testET.setText(mHour+":"+mMinute+" "+"PM");
}
else
updateTimeDisplay();
}
};
private void updateTimeDisplay() {
try {
Format formatter;
SimpleDateFormat df = new SimpleDateFormat("hh:mm");
Date d = df.parse(mHour + ":" + mMinute);
Calendar gc = new GregorianCalendar();
gc.setTime(d);
//gc.add(Calendar.HOUR, 0);
Date d2 = gc.getTime();
formatter = new SimpleDateFormat("hh:mm a");
String time = formatter.format(d2);
System.out.println("The TIME is: "+time);
testET.setText(time);
String hour = new SimpleDateFormat("hh").format(d2);
String minute = new SimpleDateFormat("mm").format(d2);
String a = new SimpleDateFormat("a").format(d2);
System.out.println("The Hour is: "+hour+ " "+minute+ " " +a);
/*myPrefs = this.getSharedPreferences("myPrefs",MODE_WORLD_WRITEABLE);
prefsEditor = myPrefs.edit();
prefsEditor.putInt("hour", Integer.parseInt(hour));
prefsEditor.putInt("minute", Integer.parseInt(minute));
prefsEditor.putString("a", a);
prefsEditor.putString("complateTime", time);
prefsEditor.commit();*/
//addTwoMonthNotification();
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case TIME_DIALOG_ID:
return new TimePickerDialog(this,mTimeSetListener, mHour, mMinute, false);
}
return null;
}
}
Hope it will help you.
Please let me know if there is any issue.

Setting the date of a DatePicker using the updateDate() method

I am currently in the process of making a date/time picker class. Essentially, I have created 3 radio buttons: 'tomorrow', 'In 2 days', and 'next week'.
What I am looking to do is have these radio buttons automatically set the date picker ahead the respective amount of days (1, 2, and 7 days ahead).
I tried using the updateDate(int year, int month, int day) method to update my DatePicker when the user clicks the radio button, but nothing happens when any of the radio buttons are clicked.
Is there a specific way to change the datepicker's displayed date WITHOUT using the the ticker buttons?
Here is my code for the class:
package com.inviscidlabs.schooled;
import java.util.Calendar;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.DatePicker;
import android.widget.RadioButton;
import android.widget.RadioGroup;
public class DateTimePicker extends Activity{
private DatePicker datePicker;
private RadioGroup dtpRadGroup;
private RadioButton rTomorrow;
private RadioButton rIn2Days;
private RadioButton rNextWeek;
private Calendar cNow;
private Calendar c;
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
//declare resources
setContentView(R.layout.datetimepicker);
dtpRadGroup=(RadioGroup) findViewById(R.id.dtp_radiogroup);
rTomorrow=(RadioButton) findViewById(R.id.dtp_button_tomorrow);
rIn2Days=(RadioButton) findViewById(R.id.dtp_button_twodays);
rNextWeek= (RadioButton) findViewById(R.id.dtp_button_nextweek);
datePicker= (DatePicker) findViewById(R.id.dtp_datepicker);
cNow= Calendar.getInstance();
cNow.setLenient(true); c.setLenient(true);
datePicker.init(cNow.get(Calendar.YEAR), cNow.get(Calendar.MONTH), cNow.get(Calendar.DAY_OF_MONTH), dListener);
}
public void onClick(View v){
switch(v.getId()){
case R.id.dtp_button_finished:
break;
}
}
public void onRadioButtonClicked(View v){
c=Calendar.getInstance();
switch(v.getId()){
case R.id.dtp_button_tomorrow:
c.add(Calendar.DAY_OF_YEAR, 1);
datePicker.updateDate(c.get(Calendar.YEAR),c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH));
break;
case R.id.dtp_button_twodays:
c.add(Calendar.DAY_OF_YEAR, 2);
datePicker.updateDate(c.get(Calendar.YEAR),c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH));
break;
case R.id.dtp_button_nextweek:
c.add(Calendar.DAY_OF_YEAR, 7);
datePicker.updateDate(c.get(Calendar.YEAR),c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH));
break;
}
}
private DatePicker.OnDateChangedListener dListener = new DatePicker.OnDateChangedListener() {
public void onDateChanged(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
Calendar cPickerDate = Calendar.getInstance();
cPickerDate.set(year, monthOfYear, dayOfMonth);
int dayOfYear = cPickerDate.get(Calendar.DAY_OF_YEAR);
Log.v("day of year", String.valueOf(dayOfYear));
//automatically checks radio buttons if user manually adjust picker
if(dayOfYear==cNow.get(Calendar.DAY_OF_YEAR)+1){
rTomorrow.setChecked(true);
}
else if(dayOfYear==cNow.get(Calendar.DAY_OF_YEAR)+2){
rIn2Days.setChecked(true);
}
else if(dayOfYear==cNow.get(Calendar.DAY_OF_YEAR)+7){
rNextWeek.setChecked(true);
} else {
dtpRadGroup.clearCheck();
}
}
};
}

use the below modified code::::
package com.inviscidlabs.schooled;
import java.util.Calendar;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.DatePicker;
import android.widget.RadioButton;
import android.widget.RadioGroup;
public class DateTimePicker extends Activity{
private static int TODAY = 0;
private static int NEXTDAY = 1;
private static int NEXTWEEK = 2;
private DatePicker datePicker;
private RadioGroup dtpRadGroup;
private RadioButton rTomorrow;
private RadioButton rIn2Days;
private RadioButton rNextWeek;
private Calendar cNow;
private Calendar c;
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
//declare resources
setContentView(R.layout.datetimepicker);
dtpRadGroup=(RadioGroup) findViewById(R.id.dtp_radiogroup);
rTomorrow=(RadioButton) findViewById(R.id.dtp_button_tomorrow);
rIn2Days=(RadioButton) findViewById(R.id.dtp_button_twodays);
rNextWeek= (RadioButton) findViewById(R.id.dtp_button_nextweek);
datePicker= (DatePicker) findViewById(R.id.dtp_datepicker);
cNow= Calendar.getInstance();
cNow.setLenient(true); c.setLenient(true);
datePicker.init(cNow.get(Calendar.YEAR), cNow.get(Calendar.MONTH), cNow.get(Calendar.DAY_OF_MONTH), dListener);
}
public void onClick(View v){
switch(v.getId()){
case R.id.dtp_button_finished:
break;
}
}
public void onRadioButtonClicked(View v){
c=Calendar.getInstance();
switch(v.getId()){
case R.id.dtp_button_tomorrow:
c.add(Calendar.DAY_OF_YEAR, 1);
showDialog(TODAY);
// datePicker.updateDate(c.get(Calendar.YEAR),c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH));
break;
case R.id.dtp_button_twodays:
c.add(Calendar.DAY_OF_YEAR, 2);
showDialog(NEXTDAY);
//datePicker.updateDate(c.get(Calendar.YEAR),c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH));
break;
case R.id.dtp_button_nextweek:
c.add(Calendar.DAY_OF_YEAR, 7);
showDialog(NEXTWEEK);
//datePicker.updateDate(c.get(Calendar.YEAR),c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH));
break;
}
}
#Override
protected Dialog onCreateDialog(int id) {
final Calendar c = Calendar.getInstance();
switch (id) {
case TODAY:
c.add(Calendar.DAY_OF_YEAR, 1);
case NEXTDAY:
c.add(Calendar.DAY_OF_YEAR, 2);
case NEXTWEEK:
c.add(Calendar.DAY_OF_YEAR, 7);
}
DatePickerDialog _date_repeat = new DatePickerDialog(this, mDateSetListener,c.get(Calendar.YEAR),c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH)){
#Override
public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth)
{
Calendar cPickerDate = Calendar.getInstance();
cPickerDate.set(year, monthOfYear, dayOfMonth);
int dayOfYear = cPickerDate.get(Calendar.DAY_OF_YEAR);
Log.v("day of year", String.valueOf(dayOfYear));
//automatically checks radio buttons if user manually adjust picker
if(dayOfYear==cNow.get(Calendar.DAY_OF_YEAR)+1){
rTomorrow.setChecked(true);
}
else if(dayOfYear==cNow.get(Calendar.DAY_OF_YEAR)+2){
rIn2Days.setChecked(true);
}
else if(dayOfYear==cNow.get(Calendar.DAY_OF_YEAR)+7){
rNextWeek.setChecked(true);
} else {
dtpRadGroup.clearCheck();
}
}
};
};
return _date_repeat;
}
}