Added in [API level 27](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Ctors](https://developer.android.com/reference/android/service/autofill/CharSequenceTransformation.Builder#pubctors) \| [Methods](https://developer.android.com/reference/android/service/autofill/CharSequenceTransformation.Builder#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/android/service/autofill/CharSequenceTransformation.Builder#inhmethods)

# CharSequenceTransformation.Builder

*** ** * ** ***

[Kotlin](https://developer.android.com/reference/kotlin/android/service/autofill/CharSequenceTransformation.Builder "View this page in Kotlin") \|Java


`
public
static


class
CharSequenceTransformation.Builder
`


`

extends https://developer.android.com/reference/java/lang/Object


`

`


`

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | android.service.autofill.CharSequenceTransformation.Builder |

<br />

*** ** * ** ***

Builder for `https://developer.android.com/reference/android/service/autofill/CharSequenceTransformation` objects.

## Summary

| ### Public constructors ||
|---|---|
| ` https://developer.android.com/reference/android/service/autofill/CharSequenceTransformation.Builder#Builder(android.view.autofill.AutofillId,%20java.util.regex.Pattern,%20java.lang.String)(https://developer.android.com/reference/android/view/autofill/AutofillId id, https://developer.android.com/reference/java/util/regex/Pattern regex, https://developer.android.com/reference/java/lang/String subst) ` Creates a new builder and adds the first transformed contents of a field to the overall result of this transformation. |

| ### Public methods ||
|---|---|
| ` https://developer.android.com/reference/android/service/autofill/CharSequenceTransformation.Builder` | ` https://developer.android.com/reference/android/service/autofill/CharSequenceTransformation.Builder#addField(android.view.autofill.AutofillId,%20java.util.regex.Pattern,%20java.lang.String)(https://developer.android.com/reference/android/view/autofill/AutofillId id, https://developer.android.com/reference/java/util/regex/Pattern regex, https://developer.android.com/reference/java/lang/String subst) ` Adds the transformed contents of a field to the overall result of this transformation. |
| ` https://developer.android.com/reference/android/service/autofill/CharSequenceTransformation` | ` https://developer.android.com/reference/android/service/autofill/CharSequenceTransformation.Builder#build()() ` Creates a new `https://developer.android.com/reference/android/service/autofill/CharSequenceTransformation` instance. |

| ### Inherited methods |
|---|---|
| From class ` https://developer.android.com/reference/java/lang/Object ` |---|---| | ` https://developer.android.com/reference/java/lang/Object` | ` https://developer.android.com/reference/java/lang/Object#clone()() ` Creates and returns a copy of this object. | | ` boolean` | ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) ` Indicates whether some other object is "equal to" this one. | | ` void` | ` https://developer.android.com/reference/java/lang/Object#finalize()() ` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. | | ` final https://developer.android.com/reference/java/lang/Class<?>` | ` https://developer.android.com/reference/java/lang/Object#getClass()() ` Returns the runtime class of this `Object`. | | ` int` | ` https://developer.android.com/reference/java/lang/Object#hashCode()() ` Returns a hash code value for the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notify()() ` Wakes up a single thread that is waiting on this object's monitor. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notifyAll()() ` Wakes up all threads that are waiting on this object's monitor. | | ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/java/lang/Object#toString()() ` Returns a string representation of the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(long timeoutMillis, int nanos) ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait(long)(long timeoutMillis) ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait()() ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*. | ||

## Public constructors

### Builder

Added in [API level 27](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public Builder (AutofillId id, 
                Pattern regex, 
                String subst)
```

Creates a new builder and adds the first transformed contents of a field to the overall
result of this transformation.

<br />

| Parameters ||
|---|---|
| `id` | `AutofillId`: id of the screen field. This value cannot be `null`. <br /> |
| `regex` | `Pattern`: regular expression with groups (delimited by `(` and `(`) that are used to substitute parts of the value. This value cannot be `null`. <br /> |
| `subst` | `String`: the string that substitutes the matched regex, using `$` for group substitution (`$1` for 1st group match, `$2` for 2nd, etc). This value cannot be `null`. <br /> |

## Public methods

### addField

Added in [API level 27](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public CharSequenceTransformation.Builder addField (AutofillId id, 
                Pattern regex, 
                String subst)
```

Adds the transformed contents of a field to the overall result of this transformation.

<br />

| Parameters ||
|---|---|
| `id` | `AutofillId`: id of the screen field. This value cannot be `null`. <br /> |
| `regex` | `Pattern`: regular expression with groups (delimited by `(` and `(`) that are used to substitute parts of the value. This value cannot be `null`. <br /> |
| `subst` | `String`: the string that substitutes the matched regex, using `$` for group substitution (`$1` for 1st group match, `$2` for 2nd, etc). This value cannot be `null`. <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/android/service/autofill/CharSequenceTransformation.Builder` | this builder. <br /> |

### build

Added in [API level 27](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public CharSequenceTransformation build ()
```

Creates a new `https://developer.android.com/reference/android/service/autofill/CharSequenceTransformation` instance.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/android/service/autofill/CharSequenceTransformation` | <br /> |