I'm trying to make a scheduler that will give you a notification when the scheduled date and time comes. I'm using a broadcast receiver class and I've made it to work for day.
It means you can select any day and time within a month it will work just fine but I'm having a lot of problems if the user selects next month or year Here is my code on schedule button click.
Here mDay, mMonth , mYear, mHour, mMinute are the selected date and time by the user for his activity and cday,cmonth,cyear are the current date and time.
btn_schedule.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
System.out.println("Entered in Alarm on click");
Calendar cal = Calendar.getInstance();
Hour = cal.get(Calendar.HOUR_OF_DAY);
Minute = cal.get(Calendar.MINUTE);
cday = cal.get(Calendar.DATE);
cmonth = cal.get(Calendar.MONTH);
cyear = cal.get(Calendar.YEAR);
dday = mDay - cday;
dmonth = mMonth - cmonth;
dyear = mYear - cyear;
if (dyear == 0) {
if (dmonth == 0) {
if (dday == 0) {
long CurrentMilli = (mHour * 3600 * 1000) + (mMinute * 60 * 1000);
long SelectedMilli = (Hour * 3600 * 1000) + (Minute * 60 * 1000);
long diff = CurrentMilli - SelectedMilli;
diff1 = diff;
System.out.println("difference and " + diff + "diff1" + diff1);
new CountDownTimer(diff, 1000) { // adjust the
// milli
// seconds
// here
public void onTick(long millisUntilFinished) {
}
public void onFinish() {
}
}.start();
}
} else {// Else if day is not the same
int dh = 24 - Hour; // today's remaining hours till
// next date
int dm = 60 - Minute;// today's remaining minutes
// till next date
long dhm = dh * 3600000;// in milli
long dmm = dm * 60000;// in milli
long totaltm = dhm + dmm;
diff1 = totaltm;
long lh = mHour * 3600000;// selected hours in milli
long lm = mMinute * 60000;// selected min in milli
ltt = lh + lm;
new CountDownTimer(totaltm, 1000) { // adjust the
// milli
// seconds
// here
public void onTick(long millisUntilFinished) {
}
public void onFinish() {
dday--;
forDay1(dday);
}
}.start();
}
} else {
// Else if month is not the same
}
} else {// Else if year is not the same
}
long a = diff1;
Long alertTime = new GregorianCalendar().getTimeInMillis() + a;
Intent alertIntent = new Intent(HomeScreen.this, Alerts.class);
AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, alertTime, PendingIntent
.getBroadcast(HomeScreen.this, 2, alertIntent,
PendingIntent.FLAG_UPDATE_CURRENT));
System.out.println("Notification is called");
Intent moreinfo = new Intent(HomeScreen.this, HomeScreen.class);
TaskStackBuilder tsb = TaskStackBuilder
.create(getApplicationContext());
tsb.addParentStack(HomeScreen.class);
tsb.addNextIntent(moreinfo);
}
});
Here is my Broadcast class:
public class Alerts extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
System.out.println("Inside Service");
createNotification(context, "Times Up!", "Start Your Activity!",
"Click here to enter the application!");
}
public void createNotification(Context context, String msg, String msgtext,
String msgalert) {
System.out.println("Method inside service is called");
PendingIntent pi = PendingIntent.getActivity(context, 0, new Intent(
context, HomeScreen.class), 0);
NotificationCompat.Builder ncb = new NotificationCompat.Builder(context)
.setContentTitle(msg).setContentText(msgtext)
.setTicker(msgalert).setSmallIcon(R.drawable.ic_launcher)
.setDefaults(Notification.DEFAULT_SOUND)
.setDefaults(Notification.DEFAULT_VIBRATE);
ncb.setContentIntent(pi);
ncb.setAutoCancel(true);
NotificationManager nm = (NotificationManager) context
.getSystemService(Context.NOTIFICATION_SERVICE);
nm.notify(2, ncb.build());
}
}
And this code is working for any day within a month.
You don't need to do all that custom logic of calculating the differences ddat and the big if (dyear == 0) {... Just set the user-selected fields to the Calendar:
Calendar cal = Calendar.getInstance();
cal.set(mYear, mMonth, mDay, mHour, mMinute);
And then you can use the new Calendar's timestamp as your alert time.
long alertTime = cal.getTimeInMillis();