Chat
public final classChat
This class is deprecated.
The Vertex AI in Firebase SDK (firebase-vertexai) has been replaced with the FirebaseAI SDK (firebase-ai) to accommodate the evolving set of supported features and services.For migration details, see the migration guide: https://firebase.google.com/docs/vertex-ai/migrate-to-latest-sdk
Representation of a multi-turn interaction with a model.
Captures and stores the history of communication in memory, and provides it as context with each new message.
Note: This object is not thread-safe, and callingsendMessage multiple times without waiting for a response will throw anInvalidStateException.
Summary
Public fields | |
|---|---|
final @NonNullList<@NonNullContent> | The previous content from the chat that has been successfully sent and received from the model. |
Public methods | |
|---|---|
final @NonNullGenerateContentResponse | sendMessage(@NonNullBitmap prompt)Sends a message using the existing history of this chat as context and the provided image prompt. |
final @NonNullGenerateContentResponse | sendMessage(@NonNullContent prompt)Sends a message using the provided |
final @NonNullGenerateContentResponse | sendMessage(@NonNullString prompt)Sends a message using the provided |
final @NonNullFlow<@NonNullGenerateContentResponse> | sendMessageStream(@NonNullBitmap prompt)Sends a message using the existing history of this chat as context and the provided image prompt. |
final @NonNullFlow<@NonNullGenerateContentResponse> | sendMessageStream(@NonNullContent prompt)Sends a message using the existing history of this chat as context and the provided |
final @NonNullFlow<@NonNullGenerateContentResponse> | sendMessageStream(@NonNullString prompt)Sends a message using the existing history of this chat as context and the provided text prompt. |
Public fields
Public constructors
Chat
public Chat(@NonNullGenerativeModel model, @NonNullList<@NonNullContent> history)
| Parameters | |
|---|---|
@NonNullGenerativeModel model | The model to use for the interaction. |
Public methods
sendMessage
public final @NonNullGenerateContentResponse sendMessage(@NonNullBitmap prompt)
Sends a message using the existing history of this chat as context and the provided image prompt.
If successful, the message and response will be added to the history. If unsuccessful, history will remain unchanged.
| Parameters | |
|---|---|
@NonNullBitmap prompt | The input that, together with the history, will be given to the model as the prompt. |
| Throws | |
|---|---|
com.google.firebase.vertexai.type.InvalidStateException com.google.firebase.vertexai.type.InvalidStateException | if |
com.google.firebase.vertexai.type.InvalidStateException com.google.firebase.vertexai.type.InvalidStateException | if the |
sendMessage
public final @NonNullGenerateContentResponse sendMessage(@NonNullContent prompt)
Sends a message using the providedprompt; automatically providing the existinghistory as context.
If successful, the message and response will be added to thehistory. If unsuccessful,history will remain unchanged.
| Parameters | |
|---|---|
@NonNullContent prompt | The input that, together with the history, will be given to the model as the prompt. |
| Throws | |
|---|---|
com.google.firebase.vertexai.type.InvalidStateException com.google.firebase.vertexai.type.InvalidStateException | if |
com.google.firebase.vertexai.type.InvalidStateException com.google.firebase.vertexai.type.InvalidStateException | if the |
sendMessage
public final @NonNullGenerateContentResponse sendMessage(@NonNullString prompt)
Sends a message using the providedtext prompt; automatically providing the existinghistory as context.
If successful, the message and response will be added to thehistory. If unsuccessful,history will remain unchanged.
| Parameters | |
|---|---|
@NonNullString prompt | The input that, together with the history, will be given to the model as the prompt. |
| Throws | |
|---|---|
com.google.firebase.vertexai.type.InvalidStateException com.google.firebase.vertexai.type.InvalidStateException | if |
com.google.firebase.vertexai.type.InvalidStateException com.google.firebase.vertexai.type.InvalidStateException | if the |
sendMessageStream
public final @NonNullFlow<@NonNullGenerateContentResponse> sendMessageStream(@NonNullBitmap prompt)
Sends a message using the existing history of this chat as context and the provided image prompt.
The response from the model is returned as a stream.
If successful, the message and response will be added to the history. If unsuccessful, history will remain unchanged.
| Parameters | |
|---|---|
@NonNullBitmap prompt | The input that, together with the history, will be given to the model as the prompt. |
| Throws | |
|---|---|
com.google.firebase.vertexai.type.InvalidStateException com.google.firebase.vertexai.type.InvalidStateException | if |
com.google.firebase.vertexai.type.InvalidStateException com.google.firebase.vertexai.type.InvalidStateException | if the |
sendMessageStream
public final @NonNullFlow<@NonNullGenerateContentResponse> sendMessageStream(@NonNullContent prompt)
Sends a message using the existing history of this chat as context and the providedContent prompt.
The response from the model is returned as a stream.
If successful, the message and response will be added to the history. If unsuccessful, history will remain unchanged.
| Parameters | |
|---|---|
@NonNullContent prompt | The input that, together with the history, will be given to the model as the prompt. |
| Throws | |
|---|---|
com.google.firebase.vertexai.type.InvalidStateException com.google.firebase.vertexai.type.InvalidStateException | if |
com.google.firebase.vertexai.type.InvalidStateException com.google.firebase.vertexai.type.InvalidStateException | if the |
sendMessageStream
public final @NonNullFlow<@NonNullGenerateContentResponse> sendMessageStream(@NonNullString prompt)
Sends a message using the existing history of this chat as context and the provided text prompt.
The response from the model is returned as a stream.
If successful, the message and response will be added to the history. If unsuccessful, history will remain unchanged.
| Parameters | |
|---|---|
@NonNullString prompt | The input(s) that, together with the history, will be given to the model as the prompt. |
| Throws | |
|---|---|
com.google.firebase.vertexai.type.InvalidStateException com.google.firebase.vertexai.type.InvalidStateException | if |
com.google.firebase.vertexai.type.InvalidStateException com.google.firebase.vertexai.type.InvalidStateException | if the |
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Last updated 2025-07-21 UTC.