Android 9 Development Cookbook - Third Edition

How it works...

The work here is done by the Google Speech Recognizer included in Android. To make sure the service is available on the device, we call PackageManager in onCreate(). If at least one activity is registered to handle the RecognizerIntent.ACTION_RECOGNIZE_SPEECH intent, then we know it's available. If no activities are available, we display a Toast indicating speech recognition is not available and disable the mic button.

The button click starts the recognition process by calling an intent created with RecognizerIntent.ACTION_RECOGNIZE_SPEECH. The EXTRA_LANGUAGE_MODEL parameter is required and has the following two choices:

• LANGUAGE_MODEL_FREE_FORM
• LANGUAGE_MODEL_WEB_SEARCH

We get the result back in the onActivityResult()