Android Short Interactions with the User
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Questions and Answers

What function is used to set the title of a dialog in Android?

setTitle

What function is used to add multiple choice items to a dialog in Android?

  • setItems
  • addMultiChoiceItems
  • setMultiChoiceItem
  • setMultiChoiceItems (correct)

    • In Android, how can a custom layout be added to a dialog?

    setView

    Match the following Android components with their functionalities:

    <p>Toast = Displaying short-lived messages to the user Snackbar = Displaying brief messages to the user with actions Dialogs = Interacting with the user through pop-up windows</p> Signup and view all the answers

    What is the purpose of toasts in Android applications?

    <p>Short messages shown in a small window for a limited period of time.</p> Signup and view all the answers

    How can you create and display a toast in Android?

    <p>Using makeText and show</p> Signup and view all the answers

    What are some similarities between Snackbars and Toasts?

    <p>All of the above</p> Signup and view all the answers

    Dialogs in Android are used for prompting users to make decisions.

    <p>True</p> Signup and view all the answers

    The base class for dialogs in Android is ___.

    <p>Dialog</p> Signup and view all the answers

    Study Notes

    Short Interactions with the User

    • Android offers different ways to implement short interactions with the user, including toasts, snackbars, and dialogs.

    Toasts

    • Toasts are short messages shown in a small window for a limited period of time.
    • They can be created using the makeText method and made visible using the show method.
    • There are two durations for toasts: Toast.LENGTH_LONG and Toast.LENGTH_SHORT.
    • Toasts can be created in one line of code using the makeText method and the show method.

    Snackbars

    • Snackbars are a new way of communication from Material Design.
    • They are very similar to toasts.
    • Snackbars can include an action button.
    • They can be created using the Snackbar.make method and made visible using the show method.
    • Snackbars can be used to show a message and an action button, and can be customized with a callback.

    Dialogs

    • Dialogs are small windows that prompt the user to make a decision or enter additional information.
    • The base class for dialogs is Dialog, but it's better to use one of the subclasses, such as AlertDialog or DatePickerDialog.
    • Dialogs can be managed using a DialogFragment.
    • Dialogs can be used for short interactions, and can be created with a builder and presented using the show method.

    Dialog Creation

    • Dialogs can be created using a DialogFragment and overriding the onCreateDialog function.
    • The creation of the dialog works as before, and it is possible to pass information to and from the activity.
    • Dialogs can have a title, content area, and buttons.

    Dialog Components

    • The title is optional and can be set using the setTitle method.
    • The content area can have a message, list, or custom layout.
    • Buttons can be positive, negative, or neutral, and can have a listener to respond to the action.

    Accessing the View Model

    • The DialogFragment can recover the ViewModel of the activity using the activityViewModels function.
    • This requires the fragment-ktx dependency in the app build.gradle file.

    Adding Lists and Radio Buttons

    • Lists can be added to a dialog using the setItems function.
    • Radio buttons can be added to a dialog using the setSingleChoiceItems function.
    • Multiple choice lists can be added to a dialog using the setMultiChoiceItems function.

    Using a Custom View

    • It is possible to use a custom layout in a dialog.
    • The layout is inflated and added to the dialog using the setView function.
    • The custom view can be used to display custom data and can be customized with a callback.

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    Description

    This quiz covers different ways of implementing short interactions with the user in Android, including Toasts, Snackbars, and Dialogs.

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