Adding receiver and service to an android reminder app

Question

I'm creating an android reminder application using AlarmManager. My main activity's GUI contains a time and datepicker dialog and a button that calls setReminder function which fetches time and date that user enters and sets reminder for that particular date and time . When the reminder time occurs it moves to another activity whose GUI contains buttons for snooze and cancel. I played the alarm using MediaPlayer. Both buttons are working well. I want my alarm to run in the background even if the application is closed and want my app to notify the OS about the alarm. That is why I want to add broadcast receiver and service to this application. How can I do that?

Main Activity code:

 public class MainActivity extends Activity {
    AlarmManager alarmMgr;


   private Calendar calendar;
   private TextView dateView;
   private int year, month, day;
   private int hour,min;
  // private int sYear, sMonth, sDay;
   //private int sHour,sMin;


   private EditText time;
   private String format = "";
   PendingIntent pi;




 @Override
 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    dateView = (TextView) findViewById(R.id.editText2);
    calendar = Calendar.getInstance();
    year = calendar.get(Calendar.YEAR);

    month = calendar.get(Calendar.MONTH);
    day = calendar.get(Calendar.DAY_OF_MONTH);
    showDate(year, month+1, day);


      time = (EditText) findViewById(R.id.editText3);
      calendar = Calendar.getInstance();

      hour = calendar.get(Calendar.HOUR_OF_DAY);
      min = calendar.get(Calendar.MINUTE);
      showTime(hour, min);       


}
  @SuppressWarnings("deprecation")
  public void setDate(View view) {
   showDialog(999);
   Toast.makeText(getApplicationContext(), "ca", Toast.LENGTH_SHORT)
   .show();
   }
  @Override
  protected Dialog onCreateDialog(int id) {
   // TODO Auto-generated method stub
   if (id == 999) {
      return new DatePickerDialog(this,myDateListener, year, month, day);
   }
   else if (id == 1111) {
       return new TimePickerDialog(this,myTimeListener, hour,min,true);
    }
   return null;
  }

 private DatePickerDialog.OnDateSetListener myDateListener = new  DatePickerDialog.OnDateSetListener() {
   @Override
   public void onDateSet(DatePicker arg0, int arg1, int arg2, int arg3) {
      // TODO Auto-generated method stub

      showDate(arg1, arg2+1, arg3);
   }
   };

  private void showDate(int year, int month, int day) {
   dateView.setText(new StringBuilder().append(day).append("/")
   .append(month).append("/").append(year));
   this.year=year;
   this.month=(month-1);
   this.day=day; 

 }


 @SuppressWarnings("deprecation")
 public void setTime(View view) {
 showDialog(1111);
 Toast.makeText(getApplicationContext(), "set", Toast.LENGTH_SHORT)
 .show();
 }


private TimePickerDialog.OnTimeSetListener myTimeListener = new TimePickerDialog.OnTimeSetListener() {

@Override
public void onTimeSet(TimePicker arg0, int arg1, int arg2) {
    showTime(arg1,arg2);

}

};
public void showTime(int hour, int min) {

   time.setText(new StringBuilder().append(hour).append(" : ").append(min)
      .append(" ").append(format));

      this.hour= hour;
      this.min= min;
   }  


    public void setAlarm(View v) 
   { 



   alarmMgr = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
   Intent intent = new Intent(getApplicationContext(),Alarm.class);

    PendingIntent                pi=PendingIntent.getActivity(getApplicationContext(),0,intent,0);


    calendar.setTimeInMillis(System.currentTimeMillis());
    Calendar calendar = Calendar.getInstance();
     calendar.set(Calendar.MONTH, month);
    calendar.set(Calendar.YEAR, year);
    calendar.set(Calendar.DAY_OF_MONTH, day); 

    calendar.set(Calendar.HOUR_OF_DAY, hour);
    calendar.set(Calendar.MINUTE, min);
  long timeToAlarm = calendar.getTimeInMillis();



  alarmMgr.set(AlarmManager.RTC_WAKEUP,calendar.getTimeInMillis(), pi); 



}


     @Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
}

}

Main xml

  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  tools:context=".MainActivity" >

  <EditText
    android:id="@+id/editText1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBottom="@+id/textView2"
    android:layout_alignLeft="@+id/button1"
    android:ems="10" >

    <requestFocus />
 </EditText>

 <Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true"
    android:onClick="setAlarm"
    android:text="Set" />

 <EditText
    android:id="@+id/editText2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBottom="@+id/button2"
    android:layout_alignParentRight="true"
    android:ems="10" />

 <Button
    android:id="@+id/button2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_above="@+id/button1"
    android:layout_alignLeft="@+id/textView2"
    android:layout_marginBottom="33dp"
    android:onClick="setDate"
    android:text="Set Date" />

 <EditText
    android:id="@+id/editText3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_below="@+id/editText1"
    android:layout_marginTop="104dp"
    android:ems="10" />

 <Button
    android:id="@+id/button3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBaseline="@+id/editText3"
    android:layout_alignBottom="@+id/editText3"
    android:layout_alignLeft="@+id/textView2"
    android:onClick="setTime"
    android:text="SetTime" />

 <TextView
    android:id="@+id/textView2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_marginTop="67dp"
    android:text="Set Hobby"
    android:textAppearance="?android:attr/textAppearanceLarge" />

  </RelativeLayout>

Alarm.java

 public class Alarm extends Activity {
   MediaPlayer mp;
   AlarmManager AlmMgr;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_alarm);
    mp=MediaPlayer.create(getApplicationContext(), R.raw.tum);
    mp.start();
  }
public void onCancel(View v)
{
 mp.stop();
 mp=null;
 }

 public void onSnooze(View v)
 {
  mp.stop();
  AlarmManager AlmMgr = (AlarmManager)getSystemService(ALARM_SERVICE);

  Calendar calendar = Calendar.getInstance();

  calendar.add(Calendar.MINUTE, 1); 
  long snoozeTime = calendar.getTimeInMillis();

  Intent AlarmIntent = new Intent(getApplicationContext(),this.getClass());
  AlarmIntent.putExtra("REQUEST CODE", 1);


  PendingIntent pi = PendingIntent.getActivity(getApplicationContext(), 1, AlarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);   
  AlmMgr.set(AlarmManager.RTC_WAKEUP, snoozeTime, pi);

 }




 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.activity_alarm, menu);
    return true;
 }

}

activity_alarm_xml

  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".Alarm" >

  <Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_centerVertical="true"
    android:layout_marginRight="67dp"
    android:onClick="onCancel"
    android:text="Cancel" />

  <Button
    android:id="@+id/button2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_centerVertical="true"
    android:layout_marginLeft="48dp"
    android:text="Snooze"
    android:onClick="onSnooze" />

</RelativeLayout>

Answer 1

I want to add broadcast receiver and service in this application. How can I do that?

Well, it will be impossible to help unless you tell us what the purpose of both, what you want to do with them, and what you already tried.

Add class of BradcastReceiver:

public class MySnoozeReciever extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Intent intent = new Intent(context, Alarm .class);
       intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
       startActivity(intent);
    }
}

Don't forget the manifest:

 <receiver android:name='.MySnoozeReciever'>
    </receiver>

Modify those lines:

Intent intent = new Intent(getApplicationContext(), MySnoozeReciever.class);

PendingIntent pi = PendingIntent.getBroadcast(getApplicationContext(),0,intent,0);