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AutofillInputFields.md

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Autofill Input Fields

Whenever possible, supply known data values to input fields to reduce redundant data entry. This is done in support of WCAG Success Criterion 1.3.5 Identify Input Purpose and Success Criterion 3.3.7 Redundant Entry.

Two approaches to auto-filling input field values are to provide hints to an Autofill Service and to supply known application data.

Provide hints to an Autofill Service

Text input fields can be autofilled by supplying the android:autofillHints property, so that any installed Autofill Service can provide suggested data values. See Optimize your app for autofill for details.

<com.google.android.material.textfield.TextInputLayout
    ...
    android:hint="Phone" >
    
    <com.google.android.material.textfield.TextInputEditText
        ...
        android:autofillHints="phoneNumber"
        android:inputType="phone" />
        
</com.google.android.material.textfield.TextInputLayout>

Supply known application data

Input fields can also be auto-populated by supplying default data values from known application data. For example, shipping address fields can be filled from previously-entered billing address data, which will simplify data entry when the billing and shipping addresses are the same.

(Note: The hard-coded text shown in these examples is only used for simplicity. Always use externalized string resource references in actual code.)

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