This is a sample activity which shows how to use Date picker control.
Underlying Algorithm:
Basic description of algorithm in step by step form:
1.) Create a Project DatePickerExample.
2.) Create a date_picker.xml in res/layout.
3.) Put the following code in date_picker.xml :
1.) Create a Project DatePickerExample.
2.) Create a date_picker.xml in res/layout.
3.) Put the following code in date_picker.xml :
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView android:id="@+id/dateDisplay"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="4dip"
android:text="@string/hello"/>
<Button android:id="@+id/pickDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="4dip"
android:text="@string/hello"/>
</LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView android:id="@+id/dateDisplay"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="4dip"
android:text="@string/hello"/>
<Button android:id="@+id/pickDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="4dip"
android:text="@string/hello"/>
</LinearLayout>
4.) To create a date picker control we need the following imports :
import java.util.Calendar;
import android.app.DatePickerDialog;
import android.widget.DatePicker;
import android.app.DatePickerDialog;
import android.widget.DatePicker;
5.) Run the application.
Steps to Create:
1.) Open Eclipse. Use the New Project Wizard and select Android Project Give the respective project name i.e. DatePickerExample. Enter following information:
Project name: DatePickerExample
Build Target: Google APIs
Application name: DatePickerExample
Package name: com.sample.DatePickerExample
Create Activity: DatePickerExample
Project name: DatePickerExample
Build Target: Google APIs
Application name: DatePickerExample
Package name: com.sample.DatePickerExample
Create Activity: DatePickerExample
On Clicking Finish DatePickerExample code structure is generated with the necessary Android Packages being imported along with DatePickerExample.java. DatePickerExample class will look like following:
package com.sample.DatePickerExample;
import android.app.Activity;
import java.util.Calendar;
import android.app.DatePickerDialog;
import android.widget.DatePicker;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.util.Calendar;
import android.app.DatePickerDialog;
import android.widget.DatePicker;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class DatePickerExample extends Activity {
private TextView mDateDisplay;
private int mYear;
private int mMonth;
private int mDay;
static final int DATE_DIALOG_ID = 1;
@Override
private int mYear;
private int mMonth;
private int mDay;
static final int DATE_DIALOG_ID = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.date_picker);
mDateDisplay = (TextView) findViewById(R.id.dateDisplay);
Button pickDate = (Button) findViewById(R.id.pickDate);
pickDate.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
showDialog(DATE_DIALOG_ID);
}
});
final Calendar c = Calendar.getInstance();
mYear = c.get(Calendar.YEAR);
mMonth = c.get(Calendar.MONTH);
mDay = c.get(Calendar.DAY_OF_MONTH);
updateDisplay();
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
super.onCreate(savedInstanceState);
setContentView(R.layout.date_picker);
mDateDisplay = (TextView) findViewById(R.id.dateDisplay);
Button pickDate = (Button) findViewById(R.id.pickDate);
pickDate.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
showDialog(DATE_DIALOG_ID);
}
});
final Calendar c = Calendar.getInstance();
mYear = c.get(Calendar.YEAR);
mMonth = c.get(Calendar.MONTH);
mDay = c.get(Calendar.DAY_OF_MONTH);
updateDisplay();
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_DIALOG_ID:
return new DatePickerDialog(this,
mDateSetListener,
mYear, mMonth, mDay);
}
return null;
}
protected void onPrepareDialog(int id, Dialog dialog) {
switch (id) {
return new DatePickerDialog(this,
mDateSetListener,
mYear, mMonth, mDay);
}
return null;
}
protected void onPrepareDialog(int id, Dialog dialog) {
switch (id) {
case DATE_DIALOG_ID:
((DatePickerDialog) dialog).updateDate(mYear, mMonth, mDay);
break;
}
}
private void updateDisplay() {
mDateDisplay.setText(
new StringBuilder()
// Month is 0 based so add 1
.append(mMonth + 1).append("-")
.append(mDay).append("-")
.append(mYear).append(" "));
}
private DatePickerDialog.OnDateSetListener mDateSetListener =
new DatePickerDialog.OnDateSetListener() {
((DatePickerDialog) dialog).updateDate(mYear, mMonth, mDay);
break;
}
}
private void updateDisplay() {
mDateDisplay.setText(
new StringBuilder()
// Month is 0 based so add 1
.append(mMonth + 1).append("-")
.append(mDay).append("-")
.append(mYear).append(" "));
}
private DatePickerDialog.OnDateSetListener mDateSetListener =
new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
mYear = year;
mMonth = monthOfYear;
mDay = dayOfMonth;
updateDisplay();
}
};
}
int dayOfMonth) {
mYear = year;
mMonth = monthOfYear;
mDay = dayOfMonth;
updateDisplay();
}
};
}
Output –The final output:
