Question

I am trying to get an alarm or notification to go at a certain time and date. I want to be able to have multiple alarms for specific dates in an array. I don’t know where to continue off of having my button working:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    //Button button = (Button)findViewById(R.id.button1);
   // button.setOnClickListener(this);
    final CheckBox checkBox = (CheckBox) findViewById(R.id.checkBox1);
    final Button button = (Button) findViewById(R.id.button1);
    button.setOnClickListener(new View.OnClickListener()
    {
        public void onClick(View v) {

             if (checkBox.isChecked()) {



             }

        }

Thank you in advance for helping me.

Answer 1

You’re going to want to use the Alarm Manager

This tutorial is a pretty simple example how to use it.

Another simple exmaple that breaks it down into the basic steps of

1. Creating an event
2. Creating a BroadcastReceiver to handle the event

EDIT
To make a notification, modify the broadcast receiver to create a notification when the alarm event is received.

Android Status Notification Documentation shows pretty well the basic steps to create a notification.

1. Get a reference to the NotificationManager
2. Create a notification instance. You can then define an image, text, and time which would just be the current time because the alarm event already defined when to go off
3. Define the notification content such as message and intent to launch when cliked
4. Call the notification

String ns = Context.NOTIFICATION_SERVICE;
NotificationManager mNotificationManager = (NotificationManager) receiverContext.getSystemService(ns);

Notification notification = new Notification(R.drawable.notification_icon, "Hello", System.currentTimeMillis());

CharSequence contentTitle = "My notification";  
CharSequence contentText = "Hello World!";  
Intent notificationIntent = new Intent(receiverContext, TargetActivity.class);  
PendingIntent contentIntent = PendingIntent.getActivity(receiverContext, 0, notificationIntent, 0);  

notification.setLatestEventInfo(receiverContext, contentTitle, contentText, contentIntent);  

private static final int notificationID = 1;

mNotificationManager.notify(notificationID, notification);

EDIT 2
Creating notification at specified time using Alarm Manager