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GNU General Public License
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package edu.cs4730.spk2txt; /*from w w w . j av a 2 s. co m*/ import java.util.ArrayList; import java.util.List; import android.os.Bundle; import android.os.Handler; import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.pm.PackageManager; import android.content.pm.ResolveInfo; import android.speech.RecognizerIntent; import android.speech.tts.TextToSpeech; import android.speech.tts.TextToSpeech.OnInitListener; import android.support.v4.app.Fragment; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.View.OnClickListener; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.ListView; import android.widget.Spinner; import android.widget.SpinnerAdapter; import android.widget.TextView; import android.widget.Toast; /** * A simple {@link Fragment} subclass. * */ public class MainFragment extends Fragment implements OnClickListener, OnInitListener{ private static final String TAG = "VoiceRecognition"; private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234; private ListView mList; private Handler mHandler; private Spinner mSupportedLanguageView; private TextToSpeech mTts; View myView; public MainFragment() { // Required empty public constructor } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { mHandler = new Handler(); mTts = new TextToSpeech(getActivity(), this); // Inflate our UI from its XML layout description. // Inflate the layout for this fragment myView = inflater.inflate(R.layout.fragment_main, container, false); // Get display items for later interaction Button speakButton = (Button) myView.findViewById(R.id.btn_speak); mList = (ListView) myView.findViewById(R.id.list); mSupportedLanguageView = (Spinner) myView.findViewById(R.id.supported_languages); // Check to see if a recognition activity is present PackageManager pm = getActivity().getPackageManager(); List<ResolveInfo> activities = pm.queryIntentActivities( new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0); if (activities.size() != 0) { speakButton.setOnClickListener(this); } else { speakButton.setEnabled(false); speakButton.setText("Recognizer not present"); } // Most of the applications do not have to handle the voice settings. If the application // does not require a recognition in a specific language (i.e., different from the system // locale), the application does not need to read the voice settings. refreshVoiceSettings(); return myView; } /** * Handle the click on the start recognition button. */ public void onClick(View v) { if (v.getId() == R.id.btn_speak) { startVoiceRecognitionActivity(); } } /** * Fire an intent to start the speech recognition activity. */ private void startVoiceRecognitionActivity() { Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); // Specify the calling package to identify your application intent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE, getClass().getPackage().getName()); // Display an hint to the user about what he should say. intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Speech recognition demo"); // Given an hint to the recognizer about what the user is going to say intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM); // Specify how many results you want to receive. The results will be sorted // where the first result is the one with higher confidence. intent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, 5); // Specify the recognition language. This parameter has to be specified only if the // recognition has to be done in a specific language and not the default one (i.e., the // system locale). Most of the applications do not have to set this parameter. if (!mSupportedLanguageView.getSelectedItem().toString().equals("Default")) { intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, mSupportedLanguageView.getSelectedItem().toString()); } startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE); } /** * Handle the results from the recognition activity. */ @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == getActivity().RESULT_OK) { mTts.speak("Did you say?", TextToSpeech.QUEUE_ADD, null); // Fill the list view with the strings the recognizer thought it could have heard ArrayList<String> matches = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS); //Say it back, JW. if (! matches.isEmpty()) mTts.speak(matches.get(0), TextToSpeech.QUEUE_ADD, null); //list them to the screen. mList.setAdapter(new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, matches)); } super.onActivityResult(requestCode, resultCode, data); } private void refreshVoiceSettings() { Log.i(TAG, "Sending broadcast"); getActivity().sendOrderedBroadcast(RecognizerIntent.getVoiceDetailsIntent(getActivity()), null, new SupportedLanguageBroadcastReceiver(), null, Activity.RESULT_OK, null, null); } private void updateSupportedLanguages(List<String> languages) { // We add "Default" at the beginning of the list to simulate default language. languages.add(0, "Default"); SpinnerAdapter adapter = new ArrayAdapter<CharSequence>(getActivity(), android.R.layout.simple_spinner_item, languages.toArray( new String[languages.size()])); mSupportedLanguageView.setAdapter(adapter); } private void updateLanguagePreference(String language) { TextView textView = (TextView) myView.findViewById(R.id.language_preference); textView.setText(language); } /** * Handles the response of the broadcast request about the recognizer supported languages. * * The receiver is required only if the application wants to do recognition in a specific * language. */ private class SupportedLanguageBroadcastReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, final Intent intent) { Log.i(TAG, "Receiving broadcast " + intent); final Bundle extra = getResultExtras(false); if (getResultCode() != Activity.RESULT_OK) { mHandler.post(new Runnable() { @Override public void run() { showToast("Error code:" + getResultCode()); } }); } if (extra == null) { mHandler.post(new Runnable() { @Override public void run() { showToast("No extra"); } }); } if (extra.containsKey(RecognizerIntent.EXTRA_SUPPORTED_LANGUAGES)) { mHandler.post(new Runnable() { @Override public void run() { updateSupportedLanguages(extra.getStringArrayList( RecognizerIntent.EXTRA_SUPPORTED_LANGUAGES)); } }); } if (extra.containsKey(RecognizerIntent.EXTRA_LANGUAGE_PREFERENCE)) { mHandler.post(new Runnable() { @Override public void run() { updateLanguagePreference( extra.getString(RecognizerIntent.EXTRA_LANGUAGE_PREFERENCE)); } }); } } private void showToast(String text) { Toast.makeText(getActivity(), text, 1000).show(); } } @Override public void onInit(int status) { // TODO Auto-generated method stub } }