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Dataset

public final class Dataset
extends Object implements Parcelable

java.lang.Object
↳	android.service.autofill.Dataset

A Dataset object represents a group of fields (key / value pairs) used to autofill parts of a screen.

For more information about the role of datasets in the autofill workflow, read Build autofill services and the AutofillService documentation.

Basic usage

In its simplest form, a dataset contains one or more fields (comprised of an id, a value, and an optional filter regex); and one or more presentations for these fields (each field could have its own presentation, or use the default presentation associated with the whole dataset).

When an autofill service returns datasets in a FillResponse and the screen input is focused in a view that is present in at least one of these datasets, the Android System displays a UI containing the presentation of all datasets pairs that have that view's AutofillId. Then, when the user selects a dataset from the UI, all views in that dataset are autofilled.

If both the current Input Method and autofill service supports inline suggestions, the Dataset can be shown by the keyboard as a suggestion. To use this feature, the Dataset should contain an InlinePresentation representing how the inline suggestion UI will be rendered.

Dataset authentication

In a more sophisticated form, the dataset values can be protected until the user authenticates the dataset—in that case, when a dataset is selected by the user, the Android System launches an intent set by the service to "unlock" the dataset.

For example, when a data set contains credit card information (such as number, expiration date, and verification code), you could provide a dataset presentation saying "Tap to authenticate". Then when the user taps that option, you would launch an activity asking the user to enter the credit card code, and if the user enters a valid code, you could then "unlock" the dataset.

You can also use authenticated datasets to offer an interactive UI for the user. For example, if the activity being autofilled is an account creation screen, you could use an authenticated dataset to automatically generate a random password for the user.

See Dataset.Builder#setAuthentication(IntentSender) for more details about the dataset authentication mechanism.

Filtering

The autofill UI automatically changes which values are shown based on value of the view anchoring it, following the rules below:

If the view's autofill value is not text or is empty, all datasets are shown.
Datasets that have a filter regex (set through Dataset.Builder#setValue(AutofillId, AutofillValue, Pattern) or Dataset.Builder#setValue(AutofillId, AutofillValue, Pattern, RemoteViews)) and whose regex matches the view's text value converted to lower case are shown.
Datasets that do not require authentication, have a field value that is text and whose value starts with the lower case value of the view's text are shown.
All other datasets are hidden.

Summary

Nested classes
`class`	`Dataset.Builder` A builder for `Dataset` objects.

Inherited constants

From interface android.os.Parcelable

`int`	`CONTENTS_FILE_DESCRIPTOR` Descriptor bit used with `describeContents()`: indicates that the Parcelable object's flattened representation includes a file descriptor.
`int`	`PARCELABLE_WRITE_RETURN_VALUE` Flag for use with `writeToParcel(Parcel, int)`: the object being written is a return value, that is the result of a function such as "`Parcelable someFunction()`", "`void someFunction(out Parcelable)`", or "`void someFunction(inout Parcelable)`".

Fields
`public static final Creator<Dataset>`	`CREATOR`

Public methods
`int`	`describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`String`	`toString()` Returns a string representation of the object.
`void`	`writeToParcel(Parcel parcel, int flags)` Flatten this object in to a Parcel.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

From interface


        
          android.os.Parcelable

`abstract int`	`describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`abstract void`	`writeToParcel(Parcel dest, int flags)` Flatten this object in to a Parcel.

Fields

CREATOR

public static final Creator<Dataset> CREATOR

Public methods

describeContents

public int describeContents ()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. For example, if the object will include a file descriptor in the output of writeToParcel(android.os.Parcel, int), the return value of this method must include the CONTENTS_FILE_DESCRIPTOR bit.

Returns
`int`	a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either `0` or `CONTENTS_FILE_DESCRIPTOR`

toString

public String toString ()

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

 getClass().getName() + '@' + Integer.toHexString(hashCode())

Returns
`String`	a string representation of the object.

writeToParcel

public void writeToParcel (Parcel parcel, 
                int flags)

Flatten this object in to a Parcel.

Parameters
`parcel`	`Parcel`: The Parcel in which the object should be written.
`flags`	`int`: Additional flags about how the object should be written. May be 0 or `Parcelable.PARCELABLE_WRITE_RETURN_VALUE`. Value is either `0` or a combination of `Parcelable.PARCELABLE_WRITE_RETURN_VALUE`, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES

Most visited

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Results for

Dataset

Basic usage

Dataset authentication

Filtering

Summary

Nested classes

Inherited constants

Fields

Public methods

Inherited methods

Fields

CREATOR

Public methods

describeContents

toString

writeToParcel