GenAI Summarization API

valarticleToSummarize="Announcing a set of on-device GenAI APIs..."
// Define task with required input type, output type, and language
valsummarizerOptions=SummarizerOptions.builder(context)
.setInputType(InputType.ARTICLE)
.setOutputType(OutputType.ONE_BULLET)
.setLanguage(Language.ENGLISH)
.build()
valsummarizer=Summarization.getClient(summarizerOptions)
suspendfunprepareAndStartSummarization(){
// Check feature availability. Status will be one of the following:
// UNAVAILABLE, DOWNLOADABLE, DOWNLOADING, AVAILABLE
valfeatureStatus=summarizer.checkFeatureStatus().await()
if(featureStatus==FeatureStatus.DOWNLOADABLE){
// Download feature if necessary. If downloadFeature is not called,
// the first inference request will also trigger the feature to be
// downloaded if it's not already downloaded.
summarizer.downloadFeature(object:DownloadCallback{
overridefunonDownloadStarted(bytesToDownload:Long){}
overridefunonDownloadFailed(e:GenAiException){}
overridefunonDownloadProgress(totalBytesDownloaded:Long){}
overridefunonDownloadCompleted(){
startSummarizationRequest(articleToSummarize,summarizer)
}
})
}elseif(featureStatus==FeatureStatus.DOWNLOADING){
// Inference request will automatically run once feature is
// downloaded. If Gemini Nano is already downloaded on the device,
// the feature-specific LoRA adapter model will be downloaded
// quickly. However, if Gemini Nano is not already downloaded, the
// download process may take longer.
startSummarizationRequest(articleToSummarize,summarizer)
}elseif(featureStatus==FeatureStatus.AVAILABLE){
startSummarizationRequest(articleToSummarize,summarizer)
}
}
funstartSummarizationRequest(text:String,summarizer:Summarizer){
// Create task request
valsummarizationRequest=SummarizationRequest.builder(text).build()
// Start summarization request with streaming response
summarizer.runInference(summarizationRequest){newText->
// Show new text in UI
}
// You can also get a non-streaming response from the request
// val summarizationResult = summarizer.runInference(
// summarizationRequest).get().summary
}
// Be sure to release the resource when no longer needed
// For example, on viewModel.onCleared() or activity.onDestroy()
summarizer.close()

StringarticleToSummarize="Announcing: a set of on-device GenAI AI APIs.";
// Define task with required input type, output type, and language
SummarizerOptionssummarizerOptions=
SummarizerOptions.builder(context)
.setInputType(SummarizerOptions.InputType.ARTICLE)
.setOutputType(SummarizerOptions.OutputType.ONE_BULLET)
.setLanguage(SummarizerOptions.Language.ENGLISH)
.build();
Summarizersummarizer=Summarization.getClient(summarizerOptions);
voidprepareAndStartSummarization()
throwsExecutionException,InterruptedException{
// Check feature availability. Status will be one of the following:
// UNAVAILABLE, DOWNLOADABLE, DOWNLOADING, AVAILABLE
try{
intfeatureStatus=summarizer.checkFeatureStatus().get();
if(featureStatus==FeatureStatus.DOWNLOADABLE){
// Download feature if necessary.
// If downloadFeature is not called, the first inference request
// will also trigger the feature to be downloaded if it's not
// already downloaded.
summarizer.downloadFeature(newDownloadCallback(){
@Override
publicvoidonDownloadCompleted(){
startSummarizationRequest(articleToSummarize,summarizer);
}
@Override
publicvoidonDownloadFailed(GenAiExceptione){/* handle error */}
@Override
publicvoidonDownloadProgress(longtotalBytesDownloaded){}
@Override
publicvoidonDownloadStarted(longbytesDownloaded){}
});
}elseif(featureStatus==FeatureStatus.DOWNLOADING){
// Inference request will automatically run once feature is
// downloaded. If Gemini Nano is already downloaded on the
// device, the feature-specific LoRA adapter model will be
// downloaded quickly. However, if Gemini Nano is not already
// downloaded, the download process may take longer.
startSummarizationRequest(articleToSummarize,summarizer);
}elseif(featureStatus==FeatureStatus.AVAILABLE){
startSummarizationRequest(articleToSummarize,summarizer);
}
}catch(ExecutionException|InterruptedExceptione){
e.printStackTrace();
}
}
voidstartSummarizationRequest(Stringtext,Summarizersummarizer){
// Create task request
SummarizationRequestsummarizationRequest=
SummarizationRequest.builder(text).build();
// Start summarization request with streaming response
summarizer.runInference(summarizationRequest,newText->{
// Show new text in UI
});
// You can also get a non-streaming response from the request
// ListenableFuture<SummarizationResult> summarizationResult
// = summarizer.runInference(summarizationRequest);
// String summary = summarizationResult.get().getSummary();
}
// Be sure to release the resource when no longer needed
// For example, on viewModel.onCleared() or activity.onDestroy()
summarizer.close();