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Android Application Development For Dummies All-in-One Cheat Sheet

A notification is a type of strongly formatted dialog when it is shown. There are differences, but if you, as a developer, think of them as special dialog boxes first, it will help you understand some of the concepts behind them. The formatting consists of these elements:

  • Headline: The headline is a small strip at the top of the notification that serves as an identifier for the intent and purpose of the notification . It contains the following elements:
    • App Icon: People easily recognize apps they use frequently by the app icon. For example, most people can only identify Twitter and Facebook by the icons their apps use.
    • App Name: Some organizations create more than one app but use similar icons for each app. The app name identifies a specific app.
    • Header text (optional): A brief piece of information to identify the sender when multiple people, organizations, devices, or other sources are using the same app for notifications. For example, the header could contain the sender’s email address.
    • Timestamp: While this element doesn’t appear by default, and Google claims it’s optional, it really is not not optional. The most annoying type of notification is one that is two weeks old and no longer important. Keep your users happy; Add a timestamp.

Fortunately, you don’t have to rely solely on a timestamp. You have the option to programmatically dismiss a stale notification before the user sees it. This is especially important when it comes to notifications in the notification bar.

Reading: How to create an app for dummies

    • Expand Display: This is a small down arrow that indicates that recipient that there is more information. Clicking the arrow expands the content to show the additional content (at this point the down arrow becomes an up arrow, allowing the user to dismiss the notification).
  • Primary content: The primary content area contains the message you want to convey. It usually contains the following elements:
    • Content Header: The content header should appear in slightly larger and usually bolder text than the rest of the notification. It should contain a very short piece of text that you use to persuade the viewer to read more.

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The header can also contain multiple notifications from one show individual app . For example, if you are working with an email app, the content header can show the number of pending emails in the user’s inbox.

    • Content body: This is the actual message. They should be brief enough to give the viewer an idea of ​​why the notification is important without having to expand on it. Of course, you can always provide an expansion indicator if you need extra space for detailed content.
  • Origin Indicator: This is a relatively large icon that informs you of the origin of the message. Although you often see a person’s picture here, some notifications include organization logos or other references to the notification source. If you see a friend’s face staring at you from a notification, you’re more likely to read it.
  • Actions: You always need an action to get rid of this Notification. Nothing is more annoying than having a notification hanging around your shoes like chewing gum. Other actions you might include are being able to reply to the notification, opening the app that generated the notification, calling the person who sent the notification, or going to a website for additional information receive. You don’t want to add a confusing set of actions unrelated to the notification.
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One important action is the hierarchy display. When an app sends multiple notifications, but those notifications represent a hierarchy, e.g. For example, a message thread, the hierarchy indicator shows how many child notifications there are for the current notification, allowing the user to decide if they want to drill down into the hierarchy to learn more.

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You can also make one of the actions a short response from the user. The user can enter text into the notification to provide a brief answer to a question, e.g. B. Yes or No to a dinner invitation.

You control the appearance of the notification using one of the following templates in most cases:

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  • Default: This is the default notification, containing just a short amount of information and an action or two.
  • Large Text: Use this template when you want to display a lot of text. It looks similar to the default template, but has room for a lot more information.
  • Large Image: In addition to the icon, this template has room for any image. You can use it for things like screen recording or viewing an image someone sent you.
  • Progress: Contains a progress bar that you can update to show the progress of something like a download.
  • Media: Used to control media playing in the background. You’ll see the standard VCR controls and possibly an image of the album art.
  • Message Delivery: This template includes an image of the person sending the message. The message could be text, but there is potential for other uses as well.
  • Custom: If none of the templates on this list have what you need, you can always do so do Try to create a custom template. This article describes how to create a custom template.
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