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RxJava 본문

프로그래밍/Android

RxJava

_soyoung 2022. 5. 8. 16:06
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Progress Dialog

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/btnProgress"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="onClick"
        android:text="자료조회"/>

</LinearLayout>
public class MainActivity extends AppCompatActivity {

    Disposable backgroundTask;

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

    public void onClick(View view) {
        runRx();
    }

    private void runRx() {
        ProgressDialog asyncDialog = new ProgressDialog(this);
        asyncDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        asyncDialog.setMessage("로딩중입니다..");
        asyncDialog.show();

        Observable obs = Observable.fromCallable(() -> {
            try {
                for (int i = 0; i < 6; i++) {
                    asyncDialog.setProgress(i * 20);
                    Thread.sleep(3 * 1000);
                    Log.d("fromCallable", "____________________________________ " + i);
                }
            } catch (InterruptedException e) {}
            return "ok";
        });

        backgroundTask = obs.subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(new Consumer<String>() {
            @Override
            public void accept(String result) {
                Log.d("accept", "____________________________________ " + result);
                asyncDialog.dismiss();
                backgroundTask.dispose();
            }
        });

    }
}

 

 

알림 기능

알림기능이란

알림기능(notification)은 어떤 이벤트가 발생하였을 때, 앱이 사용자에게 전달하는 메시지이다.

 

알림 만드는 절차

 

1. 알림 채널 생성하기 

String NOTIFICATION_CHANNEL_ID = "my_channel_id_01";

private void createNotificationChannel() {

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "My Notifications", NotificationManager.IMPORTANCE_DEFAULT);
        notificationChannel.setDescription("Channel description");
        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.createNotificationChannel(notificationChannel);
    }
}


2. 알림 빌더를 생성한다. 

NotificationCompat.Builder builder = new NotificationCompat.Builder(this);


3. 알림 속성을 설정한다.

builder.setSmallIcon(R.drawable.notification_icon);
builder.setContentTitle("알려드립니다.");
builder.setContentText("이것은 시험적인 알림입니다.");


4. 액션을 첨부한다.(선택 사양)

Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.google.com/"));
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, 	intent, 0);
builder.setContentIntent(pendingIntent);


5. 알림 객체 생성하여 보내기 

NotificationManager notificationManager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
notificationManager.notify(NOTIFICATION_ID, builder.build());

 

 

버튼을 누르면 알람을 보내는 앱

먼저 아이콘 생성

app \ src \ main \ res \ drawable 에다 new -> ImageAsset 클릭

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/btnAlarm"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="onClick"
        android:text="알람생성"/>

</LinearLayout>
public class MainActivity extends AppCompatActivity {

    String NOTIFICATION_CHANNEL_ID = "my_channel_id_01";

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

    private void createNotificationChannel() {

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "My Channel", NotificationManager.IMPORTANCE_DEFAULT);
            notificationChannel.setDescription("My Notifications");
            NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
            notificationManager.createNotificationChannel(notificationChannel);
        }
    }

    public void onClick(View view) {
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);

        // 알림이 클릭되면 이 인텐트가 보내진다.
        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.google.com/"));
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);

        notificationBuilder.setSmallIcon(R.drawable.ic_arlarm)
                .setContentTitle("메일 알림")
                .setContentText("새로운 메일이 도착하였습니다.")
                .setContentIntent(pendingIntent);

        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(1, notificationBuilder.build());
    }

}

 

 

 

예약 앱

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="예약을 원하는 시간을 선택하시오."
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <TimePicker
        android:id="@+id/timePicker1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="24dp" />

    <Button
        android:id="@+id/set_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:onClick="displayTime"
        android:text="선택"/>

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="선택된 시간"
        android:layout_marginTop="20sp"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:layout_gravity="center"/>


</LinearLayout>
public class MainActivity extends AppCompatActivity {

    private TimePicker timePicker1;
    private TextView time;
    private Calendar calendar;
    private String format = "";


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

        timePicker1 = (TimePicker) findViewById(R.id.timePicker1);
        time = (TextView) findViewById(R.id.textView3);
        calendar = Calendar.getInstance(TimeZone.getTimeZone("Asia/Seoul"), Locale.KOREA);
        int hour = calendar.get(Calendar.HOUR_OF_DAY);
        int min = calendar.get(Calendar.MINUTE);
        timePicker1.setHour(hour);
        timePicker1.setMinute(min);
        showTime(hour, min);
    }

    public void displayTime(View view) {
        int hour = timePicker1.getHour();
        int min = timePicker1.getMinute();
        showTime(hour, min);
    }

    public void showTime(int hour, int min) {
        if (hour == 0) {
            hour += 12;
            format = "AM";
        } else if (hour == 12) {
            format = "PM";
        } else if (hour > 12) {
            hour -= 12;
            format = "PM";
        } else {
            format = "AM";
        }

        time.setText(new StringBuilder().append(hour).append(" : ").append(min)
                .append(" ").append(format));
    }


}

 

 

 

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