Intent intent = new Intent(getBaseContext(), TesteAlarmeReceiver.class);
PendingIntent pendingIntent =
        PendingIntent.getBroadcast(getBaseContext(),
                1232312, intent, PendingIntent.FLAG_ONE_SHOT);
AlarmManager alarmManager =
        (AlarmManager) getSystemService(Context.ALARM_SERVICE);

alarmManager.set(AlarmManager.RTC_WAKEUP,
        cal.getTimeInMillis(), pendingIntent);
Toast.makeText(getBaseContext(),
        "call alarmManager.set()",
        Toast.LENGTH_LONG).show();

<receiver android:name=".teste_alarme.TesteAlarmeReceiver"
            android:process=":remote" />

public class TesteAlarmeReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.e("Paulo","Receiver");
        Toast.makeText(context,
                "AlarmReceiver.onReceive()",
                Toast.LENGTH_LONG).show();
    }
}