gistfile1.java

import android.app.Activity;
import android.app.AlarmManager;
import android.app.Dialog;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.TimePickerDialog;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.PowerManager;
import android.os.SystemClock;
import android.util.Log;
import android.view.View;
import android.view.WindowManager;
import android.widget.TextClock;
import android.widget.TimePicker;

import java.util.Calendar;

public class MainActivity extends Activity {

    final String LOG_TAG = "myLogs";

    NotificationManager nm;
    AlarmManager am;
    TimePicker timePicker;
    int hours;
    int minutes;
    TimePickerDialog timePickerDialog;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        am = (AlarmManager) getSystemService(ALARM_SERVICE);

    }

    public void onClick1(View view) {
        openTimePickerDialog(false);





        Calendar cal = Calendar.getInstance();
        cal.setTimeInMillis(System.currentTimeMillis());
        cal.set(Calendar.HOUR_OF_DAY, hours);
        cal.set(Calendar.MINUTE, minutes);

    }
    private void openTimePickerDialog(boolean is24r){
        Calendar calendar = Calendar.getInstance();

        timePickerDialog = new TimePickerDialog(
                MainActivity.this,
                onTimeSetListener,
                calendar.get(Calendar.HOUR_OF_DAY),
                calendar.get(Calendar.MINUTE),
                is24r);
        timePickerDialog.setTitle("Set Alarm Time");

        timePickerDialog.show();

    }
    TimePickerDialog.OnTimeSetListener onTimeSetListener
            = new TimePickerDialog.OnTimeSetListener(){

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

            Calendar calNow = Calendar.getInstance();
            Calendar calSet = (Calendar) calNow.clone();

            calSet.set(Calendar.HOUR_OF_DAY, hourOfDay);
            calSet.set(Calendar.MINUTE, minute);
            calSet.set(Calendar.SECOND, 0);
            calSet.set(Calendar.MILLISECOND, 0);

            if(calSet.compareTo(calNow) <= 0){
                //Today Set time passed, count to tomorrow
                calSet.add(Calendar.DATE, 1);
            }

            setAlarm(calSet);
        }};

    private void setAlarm(Calendar targetCal){

        Intent intent = new Intent(this, MainActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this, 0, intent, PendingIntent.FLAG_ONE_SHOT);
        ((AlarmManager) getSystemService(ALARM_SERVICE)).set(AlarmManager.RTC_WAKEUP, targetCal.getTimeInMillis(), pendingIntent);


    }

    public void onClick2(View view) {

    }

    void sendNotif(int id, PendingIntent pIntent) {
        Notification notif = new Notification(R.mipmap.ic_launcher, "Alarm set "
                , System.currentTimeMillis());
        notif.setLatestEventInfo(this, "Title " + id, "Content " + id, pIntent);
        nm.notify(id, notif);
    }
}