Java tutorial
/* Copyright 2016 Kyle Szombathy Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package com.kyleszombathy.sms_scheduler; import android.app.Activity; import android.app.Dialog; import android.app.Fragment; import android.app.TimePickerDialog; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.v4.app.DialogFragment; import android.text.format.DateFormat; import android.widget.TimePicker; import java.util.Calendar; //import android.app.DialogFragment;. /** * A simple {@link Fragment} subclass. */ public class TimePickerFragment extends DialogFragment implements TimePickerDialog.OnTimeSetListener { @NonNull @Override public Dialog onCreateDialog(Bundle savedInstanceState) { // Use the current time as the default values for the picker final Calendar c = Calendar.getInstance(); int hour = c.get(Calendar.HOUR_OF_DAY); int minute = c.get(Calendar.MINUTE); // Create a new instance of TimePickerDialog and return it return new TimePickerDialog(getActivity(), this, hour, minute, DateFormat.is24HourFormat(getActivity())); } public void onTimeSet(TimePicker view, int hourOfDay, int minute) { // Do something with the time chosen by the user this.mListener.onComplete(hourOfDay, minute); } public static interface OnCompleteListener { public abstract void onComplete(int hourOfDay, int minute); } private OnCompleteListener mListener; // make sure the Activity implemented it public void onAttach(Activity activity) { super.onAttach(activity); try { this.mListener = (OnCompleteListener) activity; } catch (final ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement OnCompleteListener"); } } }