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Added in API level 34

ModelDownloadListener

Kotlin |Java

public interface ModelDownloadListener

android.speech.ModelDownloadListener

Listener for model download events. It makes RecognitionService let callers know about the progress of model download for a single recognition request.

Summary

Public methods
`abstract void`	`onError(int error)` A network or scheduling error occurred.
`abstract void`	`onProgress(int completedPercent)` Called by `RecognitionService` only if the download has started after the request.
`abstract void`	`onScheduled()` Called when `RecognitionService` scheduled the download, but won't satisfy it immediately.
`abstract void`	`onSuccess()` This method is called: if the model is already available; if the `RecognitionService` has started and completed the download.

Public methods

onError

Added in API level 34

public abstract void onError (int error)

A network or scheduling error occurred.

Parameters

Parameters
`error`	`int`: code is defined in `SpeechRecognizer` Value is one of the following: `SpeechRecognizer.ERROR_NETWORK_TIMEOUT` `SpeechRecognizer.ERROR_NETWORK` `SpeechRecognizer.ERROR_AUDIO` `SpeechRecognizer.ERROR_SERVER` `SpeechRecognizer.ERROR_CLIENT` `SpeechRecognizer.ERROR_SPEECH_TIMEOUT` `SpeechRecognizer.ERROR_NO_MATCH` `SpeechRecognizer.ERROR_RECOGNIZER_BUSY` `SpeechRecognizer.ERROR_INSUFFICIENT_PERMISSIONS` `SpeechRecognizer.ERROR_TOO_MANY_REQUESTS` `SpeechRecognizer.ERROR_SERVER_DISCONNECTED` `SpeechRecognizer.ERROR_LANGUAGE_NOT_SUPPORTED` `SpeechRecognizer.ERROR_LANGUAGE_UNAVAILABLE` `SpeechRecognizer.ERROR_CANNOT_CHECK_SUPPORT` `SpeechRecognizer.ERROR_CANNOT_LISTEN_TO_DOWNLOAD_EVENTS`

error

int: code is defined in SpeechRecognizer
Value is one of the following:

onProgress

Added in API level 34

public abstract void onProgress (int completedPercent)

Called by RecognitionService only if the download has started after the request.

The number of calls to this method varies depending of the RecognitionService implementation. If the download finished quickly enough, onSuccess() may be called directly. In other cases, this method may be called any number of times during the download.

Parameters
`completedPercent`	`int`: the percentage of download that is completed

onScheduled

Added in API level 34

public abstract void onScheduled ()

Called when RecognitionService scheduled the download, but won't satisfy it immediately. There will be no further updates on this listener.

onSuccess

Added in API level 34

public abstract void onSuccess ()

This method is called:

if the model is already available;

if the RecognitionService has started and completed the download.

Once this method is called, the model can be safely used to satisfy recognition requests.

Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.

Last updated 2026-08-03 UTC.

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