FileDocCategorySizeDatePackage
VoiceRecognition.javaAPI DocAndroid 1.5 API3714Wed May 06 22:41:08 BST 2009com.example.android.apis.app

VoiceRecognition

public class VoiceRecognition extends android.app.Activity implements android.view.View.OnClickListener
Sample code that invokes the speech recognition intent API.

Fields Summary
private static final int
VOICE_RECOGNITION_REQUEST_CODE
private android.widget.ListView
mList
Constructors Summary
Methods Summary
protected voidonActivityResult(int requestCode, int resultCode, android.content.Intent data)
Handle the results from the recognition activity.

        if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) {
            // Fill the list view with the strings the recognizer thought it could have heard
            ArrayList<String> matches = data.getStringArrayListExtra(
                    RecognizerIntent.EXTRA_RESULTS);
            mList.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,
                    matches));
        }

        super.onActivityResult(requestCode, resultCode, data);
public voidonClick(android.view.View v)
Handle the click on the start recognition button.

        if (v.getId() == R.id.btn_speak) {
            startVoiceRecognitionActivity();
        }
public voidonCreate(android.os.Bundle savedInstanceState)
Called with the activity is first created.


                
    
        
        super.onCreate(savedInstanceState);

        // Inflate our UI from its XML layout description.
        setContentView(R.layout.voice_recognition);

        // Get display items for later interaction
        Button speakButton = (Button) findViewById(R.id.btn_speak);
        
        mList = (ListView) findViewById(R.id.list);

        // Check to see if a recognition activity is present
        PackageManager pm = 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");
        }
private voidstartVoiceRecognitionActivity()
Fire an intent to start the speech recognition activity.

        Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
                RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
        intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Speech recognition demo");
        startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE);