Set specific time in Alarmmanager by Timepicker and Datepicker

Question

I am taking a test before implementing in the real application. I have an application with two buttons (Date and Time) and a button (Schedule). As soon as the user clicks on the Date button, a Datepicker opens to choose the date. Same time, open a Timepicker so he can pick the time. The date and time go to an Edittext for the user to view and so be able to tap the Schedule button.

I can’t seem to get the Schedule into Alarmmanager. If I set only the date works, but if I set the date and time, the notification already displayed soon after.

Códido Main

    public class MainActivity extends AppCompatActivity {

    private EditText dataEscolhida;
    private EditText materia;
    private EditText horarioEscolhido;
    private Button calendarioData;
    private Button horarioAgendado;

    private Button botaoAgendar;

    SimpleDateFormat formatarData = new SimpleDateFormat("dd/MM/yyyy");
    SimpleDateFormat formatarHora = new SimpleDateFormat("HH:mm", Locale.getDefault());
    Calendar calendar = Calendar.getInstance();

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

        dataEscolhida = (EditText) findViewById(R.id.edt_dataEscolhida);
        materia = (EditText) findViewById(R.id.edt_materia);
        botaoAgendar = (Button) findViewById(R.id.btn_agendarNotificacao);
        calendarioData = (Button) findViewById(R.id.btn_calendárioDatePicker);
        horarioAgendado = (Button) findViewById(R.id.btn_horario);
        horarioEscolhido = (EditText) findViewById(R.id.edt_horario);


        botaoAgendar.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String dataAgendada = dataEscolhida.getText().toString();
                Log.d("Data agendada", String.valueOf(dataAgendada));

                String materiaAgendada = materia.getText().toString();
                agendarNotificacao(getNotification(materiaAgendada), calendar.getTime());

                Log.d("Agendamento", "Agendou");

            }
        });

        calendarioData.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                atualizarData();
            }
        });

        horarioAgendado.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                atualizaHorario();
            }
        });

    }

    private void exibeDataNoCampo() {
        dataEscolhida.setText(formatarData.format(calendar.getTime()));
        Log.d("Data escolhida: ", String.valueOf(dataEscolhida));
    }

    private void exibeHorarioNoCampo() {

        horarioEscolhido.setText(formatarHora.format(calendar.getTime()));

        Log.d("Hora escolhida: ", String.valueOf(horarioEscolhido));
    }

    private void atualizarData() {

        new DatePickerDialog(this, data, calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH),
                calendar.get(Calendar.DAY_OF_MONTH)).show();
    }

//Salva a data que o usuário configurou
    DatePickerDialog.OnDateSetListener data = new DatePickerDialog.OnDateSetListener() {
        @Override
        public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
            calendar.set(Calendar.YEAR, year);
            calendar.set(Calendar.MONTH, month);
            calendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
            exibeDataNoCampo();
        }
    };

    private void atualizaHorario() {
        new TimePickerDialog(this, horario, calendar.get(Calendar.HOUR_OF_DAY),
                calendar.get(Calendar.MINUTE), true).show();
    }

//Salva o horário que o usuário configurou
    TimePickerDialog.OnTimeSetListener horario = new TimePickerDialog.OnTimeSetListener() {
        @Override
        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {

            calendar.set(Calendar.HOUR_OF_DAY, hourOfDay);
            calendar.set(Calendar.MINUTE, minute);
            exibeHorarioNoCampo();

        }
    };

    @TargetApi(Build.VERSION_CODES.N)
    private void agendarNotificacao(Notification notification, Date dataAgendada) {

        Intent intentNotificacao = new Intent(this, Notificacao.class);
        calendar.setTime(dataAgendada);

        //Irá gerar as id aleatorias para cada notificação
        int id = (int) (Math.random() * 1000);

        intentNotificacao.putExtra(Notificacao.NOTIFICATION_ID, id);
        intentNotificacao.putExtra(Notificacao.NOTIFICATION, notification);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, id, intentNotificacao,
                PendingIntent.FLAG_UPDATE_CURRENT);

        // long tempodedisparo =  calendar.getTimeInMillis() + segundosAgendado * 60000 ;

        //disparo de notificacao
        AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
                pendingIntent);

        Log.d("AgendarNOtificacao", "agendarnotificacao");
    }

    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
    private Notification getNotification(String content) {
        Notification.Builder builder = new Notification.Builder(this);
        builder.setContentTitle("Lembrete: Estudar a matéria");
        builder.setContentText(content);
        builder.setSmallIcon(R.mipmap.ic_launcher);

        Log.d("Construindo Notificacao", "Construindo Notificacao");

        return builder.build();

    }

}

My Class of Broadcast

public class Notificacao extends BroadcastReceiver {

    public static String NOTIFICATION_ID = "notification-id";
    public static String NOTIFICATION = "notification";


    @Override
    public void onReceive(Context context, Intent intent) {

        NotificationManager notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);

        Notification notification = intent.getParcelableExtra(NOTIFICATION);
        int id = intent.getIntExtra(NOTIFICATION_ID, 0);
        notificationManager.notify(id, notification);

        //som da mensagem
        try {
            Uri som = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
            Ringtone toque = RingtoneManager.getRingtone(context, som);
            toque.play();

        }catch (Exception e){e.printStackTrace(); }

        Log.d("Notificação Exibida", "Notificacao Exibida");
    }
}

My XML

 <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="notificacaocomalarmmanager.com.flaviodeoliveira.notificacaocomalarmmanager.MainActivity">

    <EditText
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="textCapCharacters"
        android:ems="10"
        android:id="@+id/edt_materia"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="56dp"
        android:hint="Qual materia?"/>


    <EditText
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="textCapCharacters"
        android:ems="10"
        android:id="@+id/edt_dataEscolhida"
        android:hint="Data?"
        android:layout_below="@+id/edt_materia"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="10dp" />

    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Agendar Notificação"
        android:id="@+id/btn_agendarNotificacao"
        android:layout_below="@+id/btn_horario"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <Button
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Calendario"
        android:id="@+id/btn_calendárioDatePicker"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true" />

    <EditText
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/edt_horario"

        android:hint="Horário"
        android:layout_below="@+id/edt_dataEscolhida"
        android:layout_centerHorizontal="true" />

    <Button
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Horário"
        android:id="@+id/btn_horario"
        android:layout_below="@+id/btn_calendárioDatePicker"
        android:layout_centerHorizontal="true" />

</RelativeLayout>

Answer 1

[...]the notification already displayed right after...

That’s because you’re actually setting it to be displayed right away. To click on botaoAgendar, you are passing the current time by using calendar.getTime(), for setting the alarm, when it should actually be the time set in EditText.

To correct, simply pass the correct time set in TimePicker and DatePicker, in which you want the notification to appear in the method agendarNotificacao();