How to set an alarm to display a toast at particular time

Question

I want to take input from user according to his requirement from timepicker,then i want to display a toast message at that time.,. I tried the following but its not working..

for (int i = 0; i < mNameList.size(); i++) {
                    Log.i("mName is ", ""
                            + mNameList.get(i).getText().toString());
                    Log.i("Time is ", "" + timeList.get(i).getText().toString());
                    String[] time = timeList.get(i).getText().toString()
                            .split(":");
                    int hour = Integer.parseInt(time[0]);
                    int min = Integer.parseInt(time[1]);
                    Log.i("Hour", "" + hour);
                    Log.i("Min", "" + min);

                    Intent intent = new Intent(MainActivity.this,
                            AlarmReciever.class);
                    PendingIntent alarmIntent = PendingIntent.getBroadcast(
                            MainActivity.this, 0, intent,
                            PendingIntent.FLAG_UPDATE_CURRENT);
                    AlarmManager aManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

                    Calendar firingcal = Calendar.getInstance();
                    Calendar currentcal = Calendar.getInstance();

                    firingcal.set(Calendar.HOUR, hour);
                    firingcal.set(Calendar.MINUTE, min);

                    long intendedTime = firingcal.getTimeInMillis();
                    long currentTime = currentcal.getTimeInMillis();
                    if (intendedTime >= currentTime) {
                        aManager.setRepeating(AlarmManager.RTC_WAKEUP,
                                intendedTime, AlarmManager.INTERVAL_DAY,
                                alarmIntent);
                    } else {
                        firingcal.add(Calendar.DAY_OF_MONTH, 1);
                        intendedTime = firingcal.getTimeInMillis();

                        aManager.setRepeating(AlarmManager.RTC_WAKEUP,
                                intendedTime, AlarmManager.INTERVAL_DAY,
                                alarmIntent);
                    }
                }

and my reciever is:-

public void onReceive(Context context, Intent intent) {
        Toast.makeText(context, "Hey its Your turn", Toast.LENGTH_LONG).show();

    }

and i mentioned my receiver name in manifest.so how to display toast at a particular time.

Answer 1

after some googling i got the solution for my question.that is as follows..referring this and this

for (int i = 0; i < mNameList.size(); i++) {
                    Log.i("mName is ", ""
                            + mNameList.get(i).getText().toString());
                    Log.i("Time is ", "" + timeList.get(i).getText().toString());
                    String[] time = timeList.get(i).getText().toString()
                            .split(":");
                    int hour = Integer.parseInt(time[0]);
                    int min = Integer.parseInt(time[1]);
                    Log.i("Hour", "" + hour);
                    Log.i("Min", "" + min);

                    Calendar firingcal = Calendar.getInstance();
                    Calendar currentcal = Calendar.getInstance();

                    firingcal.set(Calendar.MONTH, 3);
                    firingcal.set(Calendar.YEAR, 2014);
                    firingcal.set(Calendar.DAY_OF_MONTH, 9);
                    firingcal.set(Calendar.HOUR_OF_DAY, hour);
                    firingcal.set(Calendar.MINUTE, min);
                    firingcal.set(Calendar.SECOND, 00);

                    if (firingcal.compareTo(currentcal) <= 0) {
                        Toast.makeText(MainActivity.this, "Invalid date/time",
                                Toast.LENGTH_LONG).show();

                    } else {
                        Log.i("Alarm Time in else is  ",
                                "" + firingcal.getTime());
                        scheduleAlarm(firingcal);
                    }

                }
            }


public void scheduleAlarm(Calendar alarmTime) {

        Toast.makeText(MainActivity.this,
                "Alarm time is set at" + alarmTime.getTime(), Toast.LENGTH_LONG)
                .show();
        Intent intent = new Intent(MainActivity.this, AlarmReciever.class);
        final int _id = (int) System.currentTimeMillis();
        PendingIntent pIntent = PendingIntent.getBroadcast(MainActivity.this,
                _id, intent, 0);
        AlarmManager aManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        aManager.set(AlarmManager.RTC_WAKEUP, alarmTime.getTimeInMillis(),
                pIntent);

    }

Answer 2

set your alarm like:

Intent intent = new Intent();
        intent.setClass(_Context, OnAlarmReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(_Context, 234324243, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        AlarmManager alarmManager = (AlarmManager) _Context.getSystemService(Activity.ALARM_SERVICE);

        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.HOUR_OF_DAY, 4);
        cal.add(Calendar.MINUTE, 30);
        cal.add(Calendar.SECOND, 00);

        alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP,
                cal.getTimeInMillis(),
                AlarmManager.INTERVAL_DAY,
                pendingIntent);

now set your receiver in menifest file like:

<receiver android:name="com.televero.receiver.OnAlarmReceiver" >
        </receiver>

Hope this works.

Answer 3

in your manifest add this:

<receiver android:name="Your.Package.Name.AlarmReciever" />

and create class AlarmReciever :

public class AlarmReciever extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        MainActivity.check();
    }
}

then in main activity add this:

public static AlarmManager am;
public static PendingIntent sender;
try {

            Intent intent1 = new Intent(thisActivity, AlarmReciever.class);
            sender = PendingIntent.getBroadcast(thisActivity, 2, intent1 ,0);
            am = (AlarmManager) getSystemService(ALARM_SERVICE);
            long l = new Date().getTime();
            if (l < new Date().getTime()) {
                l += 100;
            }
            am.setRepeating(AlarmManager.RTC_WAKEUP, l, 100, sender);
        } catch (Exception e) {
        }

Last thing add check() Method to MainActivity:

public static void check() {
//Compare time and show Toast at particular time
}