How to disable past dates in Android date picker?

You can do

datePicker.setMinDate(System.currentTimeMillis() - 1000);

which sets today's date as minimum date and all the past dates are disabled.

datePicker is an object of DatePicker if you are using an object of DatePickerDialog you can do

datePickerDialog.getDatePicker().setMinDate(System.currentTimeMillis() - 1000);

Note: setMinDate was introduced in API 11

This method will work properly.

//Get yesterday's date
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.DATE, -1);

//Set yesterday time milliseconds as date pickers minimum date
DatePickerDialog datePickerDialog = new DatePickerDialog(context, myDateListener, year, month, day);
datePickerDialog.getDatePicker().setMinDate(calendar.getTimeInMillis());
datePickerDialog.show();

With the Material Components Library just use the MaterialDatePicker and build your own DateValidator or you can just use the DateValidatorPointForward provided by the library.

Something like:

MaterialDatePicker.Builder<Long> builder = MaterialDatePicker.Builder.datePicker();

CalendarConstraints.DateValidator dateValidator = DateValidatorPointForward.now();
//if you need a custom date just use
//CalendarConstraints.DateValidator dateValidator = DateValidatorPointForward.from(yourDate);
constraintsBuilder.setValidator(dateValidator);
builder.setCalendarConstraints(constraintsBuilder.build());

MaterialDatePicker<Long> picker = builder.build();
picker.show(getSupportFragmentManager(), picker.toString());

This is how I do it:

public class DatePickerFragment extends DialogFragment {
OnDateSetListener ondateSet;
Calendar c;
int year = 0, month = 0, day = 0;

public DatePickerFragment() {
}

public void setCallBack(OnDateSetListener ondate) {
    ondateSet = ondate;
}

public static DatePickerFragment newInstance(Bundle bundle) {
    DatePickerFragment myFragment = new DatePickerFragment();
    myFragment.setArguments(bundle);
    return myFragment;
}

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    // final Calendar c = Calendar.getInstance();
//if else for null arguments
    if (getArguments() != null) {
        year = getArguments().getInt("year");
        month = getArguments().getInt("month");
        day = getArguments().getInt("day");
        c = Calendar.getInstance();
        c.set(year, month, day);

    } else {
        c = Calendar.getInstance();
        year = c.get(Calendar.YEAR);
        month = c.get(Calendar.MONTH);
        day = c.get(Calendar.DAY_OF_MONTH);
        Log.d("else", "else");
    }


    DatePickerDialog picker = new DatePickerDialog(getActivity(),
            ondateSet, year, month, day);
    picker.getDatePicker().setMinDate(c.getTime().getTime());
    Log.d("picker timestamp", c.getTime().getTime() + "");
    return picker;
}
}

This is how you instantiate the picker:

Bundle bundle = new Bundle();
        Calendar c = Calendar.getInstance();
        bundle.putInt("year", c.get(Calendar.YEAR));
        bundle.putInt("month", c.get(Calendar.MONTH));
        bundle.putInt("day", c.get(Calendar.DAY_OF_MONTH));
        DatePickerFragment fragment = DatePickerFragment
                .newInstance(bundle);
        fragment.setCallBack(dateSet);
        fragment.show(getActivity().getSupportFragmentManager(), null);

This is my implementation feel free to change it. Note that this code sets mindate as currnet date by default. Also the newInstance is important.

You can use this line into your code...

private Calendar cal;
private int day;
private int month;
private int year;

static final int DATE_PICKER_ID = 1111; 
TextView textView;

    textView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            cal = Calendar.getInstance();
            day = cal.get(Calendar.DAY_OF_MONTH);
            month = cal.get(Calendar.MONTH);
            year = cal.get(Calendar.YEAR);
            showDialog(DATE_PICKER_ID);

        }
    });

@Override
protected Dialog onCreateDialog(int id) {
    switch (id) {
        case DATE_PICKER_ID:
            // create a new DatePickerDialog with values you want to show

            DatePickerDialog datePickerDialog = new DatePickerDialog(this, datePickerListener, year, month, day);
            Calendar calendar = Calendar.getInstance();

            calendar.add(Calendar.DATE, 0); // Add 0 days to Calendar
            Date newDate = calendar.getTime();
            datePickerDialog.getDatePicker().setMinDate(newDate.getTime()-(newDate.getTime()%(24*60*60*1000)));
            return datePickerDialog;
    }
    return null;
}

private DatePickerDialog.OnDateSetListener datePickerListener = new DatePickerDialog.OnDateSetListener() {
    // the callback received when the user "sets" the Date in the
    // DatePickerDialog
    public void onDateSet(DatePicker view, int selectedYear, int selectedMonth, int selectedDay) {

        textViewTime.setText(selectedDay + "/" + (selectedMonth + 1) + "/" + selectedYear);
    }
};