How to integrate Activities with other Android components?

        // Example of how to start a Service from an Activity
        Intent serviceIntent = new Intent(this, MyService.class);
        startService(serviceIntent);

        // Example of how to send a Broadcast from an Activity
        Intent broadcastIntent = new Intent("com.example.MY_ACTION");
        sendBroadcast(broadcastIntent);

        // Example of how to query a Content Provider from an Activity
        Cursor cursor = getContentResolver().query(
            Uri.parse("content://com.example.provider/data"),
            null, null, null, null);