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Notifications
Notification is a message that will be displayed to the user outside of the application’s usual UI.
When you execute a command telling the system to issue a notification, it will appear as an icon in the notification area, and to see the details, the user opens the notification space.
The notification space is this area where the details are shown (also called the notification drawer) are areas controlled by the system and the user can see at any time.
Creation of a Notification
- To specify actions and information that will be displayed to the user, use a
Notification.Builderobject.​ - To create a push notification, use
Notification.Builder.build(), which is an example of the type ofnotificationprovided as previously defined specifications.​ - To notify a notification, simply pass the
Notificationobject usingNotificationManager.getInstance().Notify();
Content Needed to Create a Notification
The object on smartphones should contain the following:
- A title, defined by
title(); - Detail text, defined by
text();
A Simple Example
HelloTCNotification
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import totalcross.notification.Notification;
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import totalcross.notification.NotificationManager;
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import totalcross.sys.Settings;
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import totalcross.ui.Button;
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import totalcross.ui.Edit;
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import totalcross.ui.MainWindow;
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​
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public class HelloWorld extends MainWindow {
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private Button btnHello;
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​
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public HelloWorld(){
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super("", NO_BORDER);
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Settings.uiAdjustmentsBasedOnFontHeight = true;
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setUIStyle(Settings.Material);
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}
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​
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public void initUI() {
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Edit title = new Edit("Title");
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title.caption = "Title";
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add(title, LEFT+150, TOP+100, FILL-150, PREFERRED);
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Edit text = new Edit("Text");
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text.caption = "Text";
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add(text, LEFT+150, AFTER+50, FILL-150, PREFERRED);
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btnHello = new Button("Notify!");
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btnHello.addPressListener(
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(e) -> {
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Notification.Builder builder = new Notification.Builder();
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Notification notification = builder
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.title(title.getText())
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.text(text.getText())
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.build();
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NotificationManager.getInstance().notify(notification);
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});
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add(btnHello, CENTER, AFTER+150, PARENTSIZE+38, PARENTSIZE+8);
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}
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}
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References
Last modified 3yr ago