Data Picker in Android Application
To provide a widget for selecting a date, use
the
DatePicker widget, which allows the user to select the
month, day, and year, in a familiar interface.
In this article, I am going to explain how to
create a
DatePickerDialog, which presents the date picker in a floating
dialog box at the press of a button. When the date is set by the user, a
TextView will update with the new date.
Start a new project named DatePickerDemo.
Open the res/layout/main.xml file and
insert the following:
<?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:id="@+id/dateDisplay"
android:layout_marginTop="10dp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<Button
android:id="@+id/pickDate"
android:layout_marginTop="10dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Change the date"
/>
</LinearLayout>
Open Activity file and add the following code as shown below:
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.view.View.OnClickListener;
import
android.widget.Button;
import
android.widget.DatePicker;
import
android.widget.TextView;
public
class
DatePickerActivity
extends Activity {
private TextView
mDateDisplay;
private Button
mPickDate;
private
int
mYear;
private
int
mMonth;
private
int
mDay;
static
final
int
DATE_DIALOG_ID = 0;
@Override
public
void onCreate(Bundle
savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// capture or view elements
mDateDisplay = (TextView) findViewById(R.id.dateDisplay);
mPickDate = (Button) findViewById(R.id.pickDate);
// add a click listener on the button
mPickDate.setOnClickListener(new OnClickListener()
{
public
void onClick(View v) {
showDialog(DATE_DIALOG_ID);
}
});
// get the current date
final Calendar c = Calendar.getInstance();
mYear = c.get(Calendar.YEAR);
mMonth = c.get(Calendar.MONTH);
mDay = c.get(Calendar.DAY_OF_MONTH);
updateDisplay();
}
// updates the date in the TextView
private
void updateDisplay()
{
mDateDisplay.setText(new
StringBuilder().append(mMonth + 1).append("-
").append(mDay).append("-").append(mYear).append(" "));
}
// the callback received when the user "sets" the date
in the dialog
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();
}
};
@Override
protected Dialog onCreateDialog(int id)
{
switch(id)
{
case
DATE_DIALOG_ID:
return
new DatePickerDialog(this,
mDateSetListener,
mYear,
mMonth,mDay);
}
return
null;
}
}
Run the application.
You output looks like something this:
When you click on the button (Change the
date), a date picker dialog will open, you can set the date from the date
picker dialog.
After setting the date, a new date will display in the
TextView.