How to set TimePicker show with format 24h

I've created a TimePicker in layout and I want it to show time with format 24h.

Can you help me? Thanks.

TimePicker is a view for selecting the time of day, in either 24 hour or AM/PM mode. You can use setIs24HourView(true) method with TimePicker.

Setting TimePicker by default to 24 hour mode is not always a good idea since many countrys have diffrent convention. For this case use DateFormat.is24HourFormat(getActivity()).

Your final code migth look like picker.setIs24HourView(DateFormat.is24HourFormat(this));.

Further details see:

• http://developer.android.com/guide/topics/ui/controls/pickers.html
• http://developer.android.com/reference/android/widget/TimePicker.html
• http://developer.android.com/reference/android/text/format/DateFormat.html

If you want the TimePicker to be correctly initialized with the current time in 24h format use the following:

import java.util.Calendar;

timePicker.setIs24HourView(true);
timePicker.setCurrentHour(Calendar.getInstance().get(Calendar.HOUR_OF_DAY));

Otherwise, due to Android bug, the picker will start with an incorrect hour (2 instead of 14 etc).

You just have to retrieve the TimePicker instance from the view after inflating it, then you can modify the widget.

Ids are arbitrary:

View v=getActivity().getLayoutInflater().inflate(R.layout.dialog_time, null);
TimePicker timePicker=(TimePicker)v.findViewById(R.id.dialog_time_timePicker);
timePicker.setIs24HourView(true);

xml

<TimePicker
        android:layout_width="300dp"
        android:layout_height="300dp"
        android:id="@+id/timePicker" />

java

TimePicker timePicker = (TimePicker) findViewById(R.id.timePicker);    
timePicker.setIs24HourView(true); 

By default, it displays time in the AM/PM format. If you want to change time in the 24 hour format, then you can use the setIs24HourView() method. See this link: http://www.androidaspect.com/2012/06/timepicker-view-tutorial.html

I need the same just for an application to set the duration spend for doing a task. I found that I just need to extend the TimePickerDialog class and pass True in the last constructor parameter boolean is24HourView.

public class DurationPickerDialog extends TimePickerDialog {

public DurationPickerDialog(Context context, TimePickerDialog.OnTimeSetListener callBack, int hourOfDay, int minute){
    super(context, callBack, hourOfDay, minute, true);
}

Then you only need to create this as

TimePickerDialog durationPicker =  new DurationPickerDialog(getActivity(), this, hour, minute);
durationPicker.setTitle("Duration:");

You just need call and send true to setIs24HourView function.

TimePicker tpHourMin = (TimePicker) findViewById(R.id.timePicker);
tpHourMin.setIs24HourView(true);

As some people have already mentioned just set the parameter to true or false.

timePicker.setIs24HourView(true);

You can find a complete example with source code to download from here http://www.ahotbrew.com/android-timepicker-example/

Or you let the user decide for himself which format he want to use.

In your MainActivty:

DialogFragment timePicker = new TimePickerFragment();
timePicker.show(getSupportFragmentManager(), "time picker");


   @Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {

            TextView outputText= (TextView)findViewById(R.id.outputText);
            outputText.setText(hourOfDay + " : "+ minute);
}

And in a new Java Class (TimePickerFragment):

public class TimePickerFragment extends DialogFragment {

@NonNull
@Override
public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {

    Calendar c = Calendar.getInstance();
    int hour = c.get(Calendar.HOUR_OF_DAY);
    int minute = c.get(Calendar.MINUTE);



    return new TimePickerDialog(getActivity(),(TimePickerDialog.OnTimeSetListener) getActivity(), hour, minute, android.text.format.DateFormat.is24HourFormat(getActivity()));

}}

For Time picker Dialog

Timepicker dialog provides by android to select the time.

Java provides default functionality by passing is24HourView == true in TimePickerDialog constructor.

public TimePickerDialog(Context context, OnTimeSetListener listener, int hourOfDay, int minute,boolean is24HourView) {
        this(context, 0, listener, hourOfDay, minute, is24HourView);
    }

Pass true for 24 hours or pass false to set time picker dialog in AM-PM format.

for ex: (Kotlin)

 private fun showTimePicker() {
        val cal = Calendar.getInstance()
        val dialog = TimePickerDialog(this, TimePickerDialog.OnTimeSetListener { view, hourOfDay, minute ->
            Log.e("Time :","$hourOfDay:$minute")
        }, cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE), true) //here pass true for 24hrs view else false for AM-PM(12hrs view)
        dialog.show()
    }