Here's a working solution:
final Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
intent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE, yourPackageHere);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
intent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, 1000);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, "en-US");
intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Your Prompt");
startActivityForResult(intent,REQUEST_CODE);
But before using this function, you must check whether the user is granted permission RECORD_AUDIOand the device ACTION_RECOGNIZE_SPEECH.
. MAX_RESULTS, . , onActivityResult List<String> results . .