Prevent user from selecting the elapsed time - TimePickerDialog
IMPORTANT EDIT: I did a bit of searching and it seems that OnTimeChangedListener is not firing in Android 5.0 (API 21). Gustavo's answer below will work for API 20 or below, and API 22 which I have tested. ( Source )
I would like to prevent the user from entering the time before the current time. I am checking for valid time using the method before
provided Date
. How can I prevent the dialogue from accepting invalid times as part of this validation?
I missed the extra code where I initialize the selected time (how Date
).
final Calendar mcurrentTime = Calendar.getInstance();
final int hour = mcurrentTime.get(Calendar.HOUR_OF_DAY);
final int minute = mcurrentTime.get(Calendar.MINUTE);
final TimePickerDialog mTimePicker;
mTimePicker = new TimePickerDialog(MainActivity.this, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timePicker, int selectedHour, int selectedMinute) {
//PSEUDO: Date selectedDateTime init here
if (selectedDateTime.before(mcurrentTime.getTime())) {
// prevent user from selecting time
}
}
}, hour, minute, true);//true = 24 hour time
mTimePicker.setTitle("Select Time");
mTimePicker.show();
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Here's the original post.
In the next answer, you should add a TimePickerDialog class .
public class RangeTimePickerDialog extends TimePickerDialog {
private int minHour = -1;
private int minMinute = -1;
private int maxHour = 25;
private int maxMinute = 25;
private int currentHour = 0;
private int currentMinute = 0;
private Calendar calendar = Calendar.getInstance();
private DateFormat dateFormat;
public RangeTimePickerDialog(Context context, OnTimeSetListener callBack, int hourOfDay, int minute, boolean is24HourView) {
super(context, callBack, hourOfDay, minute, is24HourView);
currentHour = hourOfDay;
currentMinute = minute;
dateFormat = DateFormat.getTimeInstance(DateFormat.SHORT);
try {
Class<?> superclass = getClass().getSuperclass();
Field mTimePickerField = superclass.getDeclaredField("mTimePicker");
mTimePickerField.setAccessible(true);
TimePicker mTimePicker = (TimePicker) mTimePickerField.get(this);
mTimePicker.setOnTimeChangedListener(this);
} catch (NoSuchFieldException e) {
} catch (IllegalArgumentException e) {
} catch (IllegalAccessException e) {
}
}
public void setMin(int hour, int minute) {
minHour = hour;
minMinute = minute;
}
public void setMax(int hour, int minute) {
maxHour = hour;
maxMinute = minute;
}
@Override
public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
Log.d("DADADADA", "onTimeChanged");
boolean validTime = true;
if (hourOfDay < minHour || (hourOfDay == minHour && minute < minMinute)) {
validTime = false;
}
if (hourOfDay > maxHour || (hourOfDay == maxHour && minute > maxMinute)) {
validTime = false;
}
if (validTime) {
currentHour = hourOfDay;
currentMinute = minute;
}
updateTime(currentHour, currentMinute);
updateDialogTitle(view, currentHour, currentMinute);
}
private void updateDialogTitle(TimePicker timePicker, int hourOfDay, int minute) {
calendar.set(Calendar.HOUR_OF_DAY, hourOfDay);
calendar.set(Calendar.MINUTE, minute);
String title = dateFormat.format(calendar.getTime());
setTitle(title);
}
}
After that replace TimePickerDialog with RangeTimePickerDialog
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Calendar mcurrentTime = Calendar.getInstance();
final int hour = mcurrentTime.get(Calendar.HOUR_OF_DAY);
final int minute = mcurrentTime.get(Calendar.MINUTE);
final RangeTimePickerDialog mTimePicker;
mTimePicker = new RangeTimePickerDialog(MainActivity.this, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timePicker, int selectedHour, int selectedMinute) {
Log.d("TAG", "inside OnTimeSetListener");
}
}, hour, minute, true);//true = 24 hour time
mTimePicker.setTitle("Select Time");
mTimePicker.setMin(hour, minute);
mTimePicker.show();
}
}
After that check the dialog, time is out of bounds, I checked this with both setMax () and setMin () and also set only one.
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The method onTimeSet()
is called once when the dialog is dismissed and called twice when the Finish button is clicked.
I would just validate this method in a second call. Ignore the former. If it's not valid, show an error (maybe a toast) and run the dialog again
Elaborate
Both calls onTimeSet
will be the same. Now I don't have a link, but I believe one call is when the dialog was shown (time set or not) and then canceled. Two is exactly what it is, but instead of canceling, it's when the user clicks Done.
The reason I say to ignore the former is because it can set the time and decide to cancel. In this case, do not accept onTimeSet()
. If it doesn't matter to you, then you don't need to worry about it.
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