时间日期进程会用到平时的开发中，android内置了两种可交互的时间日期控件，一种是对话框形式的，一种是内嵌式的。
分别使用了android的类TimePickerDialog、DatePickerDialog以及TimePicker，其中TimePicker需要在layout中进行设置
对话框形式的时间控件
public class DateDialog extends Activity {
// where we display the selected date and time
private TextView mDateDisplay;
// date and time
private int mYear;
private int mMonth;
private int mDay;
private int mHour;
private int mMinute;
static final int TIME_DIALOG_ID = 0;
static final int DATE_DIALOG_ID = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.date_widgets_example_1);
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);
}
});
Button pickTime = (Button) findViewById(R.id.pickTime);
pickTime.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
showDialog(TIME_DIALOG_ID);
}
});
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);
updateDisplay();
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case TIME_DIALOG_ID:
return new TimePickerDialog(this,
mTimeSetListener, mHour, mMinute, false);
case DATE_DIALOG_ID:
return new DatePickerDialog(this,
mDateSetListener,
mYear, mMonth, mDay);
}
return null;
}
@Override
protected void onPrepareDialog(int id, Dialog dialog) {
switch (id) {
case TIME_DIALOG_ID:
((TimePickerDialog) dialog).updateTime(mHour, mMinute);
break;
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(" ")
.append(pad(mHour)).append(":")
.append(pad(mMinute)));
}
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();
}
};
private TimePickerDialog.OnTimeSetListener mTimeSetListener =
new TimePickerDialog.OnTimeSetListener() {
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
mHour = hourOfDay;
mMinute = minute;
updateDisplay();
}
};
private static String pad(int c) {
if (c >= 10)
return String.valueOf(c);
else
return "0" + String.valueOf(c);
}
}
内嵌式时间控件
public class DateIncline extends Activity {
// where we display the selected date and time
private TextView mTimeDisplay;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.date_widgets_example_2);
TimePicker timePicker = (TimePicker) findViewById(R.id.timePicker);
timePicker.setCurrentHour(12);
timePicker.setCurrentMinute(15);
mTimeDisplay = (TextView) findViewById(R.id.dateDisplay);
updateDisplay(12, 15);
timePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {
public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
updateDisplay(hourOfDay, minute);
}
});
}
private void updateDisplay(int hourOfDay, int minute) {
mTimeDisplay.setText(
new StringBuilder()
.append(pad(hourOfDay)).append(":")
.append(pad(minute)));
}
private static String pad(int c) {
if (c >= 10)
return String.valueOf(c);
else
return "0" + String.valueOf(c);
}
}