IMPORTANT: In July 2025, we stopped releasing new versions of KTX modules, and we removed the KTX libraries from the Firebase Android BoM (v34.0.0). If you use KTX APIs from the previously released KTX modules, we recommend that you migrate your app to use KTX APIs from the main modules instead. For details, see the FAQ about this initiative.

Content.Builder

class Content.Builder

Builder class to facilitate constructing complex Content objects.

Summary

Public constructors
`Builder()`

Public functions
`Content`	`build()` Returns a new `Content` using the defined `role` and `parts`.
`Content.Builder`	`fileData(uri: String, mimeType: String)` Adds a new `FileDataPart` with the provided `uri` and `mimeType` to `parts`.
`Content.Builder`	`image(image: Bitmap)` Adds a new `ImagePart` with the provided `image` to `parts`.
`Content.Builder`	`inlineData(bytes: ByteArray, mimeType: String)` Adds a new `InlineDataPart` with the provided `bytes`, which should be interpreted by the model based on the `mimeType`, to `parts`.
`Content.Builder`	`<T : Part> part(data: T)` Adds a new `Part` to `parts`.
`Content.Builder`	`text(text: String)` Adds a new `TextPart` with the provided `text` to `parts`.

Public properties
`MutableList<Part>`	`parts` The mutable list of `Part`s comprising the `Content`.
`String?`	`role` The producer of the content.

Public constructors

Builder

Builder()

Public functions

build

fun build(): Content

Returns a new Content using the defined role and parts.

fileData

fun fileData(uri: String, mimeType: String): Content.Builder

Adds a new FileDataPart with the provided uri and mimeType to parts.

image

fun image(image: Bitmap): Content.Builder

Adds a new ImagePart with the provided image to parts.

inlineData

fun inlineData(bytes: ByteArray, mimeType: String): Content.Builder

Adds a new InlineDataPart with the provided bytes, which should be interpreted by the model based on the mimeType, to parts.

part

fun <T : Part> part(data: T): Content.Builder

Adds a new Part to parts.

text

fun text(text: String): Content.Builder

Adds a new TextPart with the provided text to parts.

Public properties

parts

var parts: MutableList<Part>

The mutable list of Parts comprising the Content.

Prefer using the provided helper methods over modifying this list directly.

role

var role: String?

The producer of the content. Must be either 'user' or 'model'. By default, it's "user".