By sukhpal saini
A DatePicker is a widget that allows the user to select a month, day and year.
Create a new Android Application, AndroidDatePicker.
Modify the layout, main.xml, to add a button to start the DatePicker.
Modify the main program, AndroidDatePicker.java.
A Toast will be displayed in onCreateDialog(), to show that DatePickerDialog() will be created once only (in the first time display the dialog).
A DatePicker is a widget that allows the user to select a month, day and year.
Create a new Android Application, AndroidDatePicker.
Modify the layout, main.xml, to add a button to start the DatePicker.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<Button
android:id="@+id/datepickerbutton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="DatePicker"
/>
</LinearLayout>Modify the main program, AndroidDatePicker.java.
package com.exercise.AndroidDatePicker;
import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.Toast;
public class AndroidDatePicker extends Activity {
private int myYear, myMonth, myDay;
static final int ID_DATEPICKER = 0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button datePickerButton = (Button)findViewById(R.id.datepickerbutton);
datePickerButton.setOnClickListener(datePickerButtonOnClickListener);
}
private Button.OnClickListener datePickerButtonOnClickListener
= new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
final Calendar c = Calendar.getInstance();
myYear = c.get(Calendar.YEAR);
myMonth = c.get(Calendar.MONTH);
myDay = c.get(Calendar.DAY_OF_MONTH);
showDialog(ID_DATEPICKER);
}
};
@Override
protected Dialog onCreateDialog(int id) {
// TODO Auto-generated method stub
switch(id){
case ID_DATEPICKER:
Toast.makeText(AndroidDatePicker.this,
"- onCreateDialog -",
Toast.LENGTH_LONG).show();
return new DatePickerDialog(this,
myDateSetListener,
myYear, myMonth, myDay);
default:
return null;
}
}
private DatePickerDialog.OnDateSetListener myDateSetListener
= new DatePickerDialog.OnDateSetListener(){
@Override
public void onDateSet(DatePicker view, int year,
int monthOfYear, int dayOfMonth) {
// TODO Auto-generated method stub
String date = "Year: " + String.valueOf(year) + "\n"
+ "Month: " + String.valueOf(monthOfYear+1) + "\n"
+ "Day: " + String.valueOf(dayOfMonth);
Toast.makeText(AndroidDatePicker.this, date,
Toast.LENGTH_LONG).show();
}
};
}A Toast will be displayed in onCreateDialog(), to show that DatePickerDialog() will be created once only (in the first time display the dialog).
