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Merge "Show how to use broadcast for accessing voice search settings."

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This commit is contained in:
Luca Zanolin
2011-08-04 02:51:50 -07:00
committed by Android (Google) Code Review
parent d8245ecdb1 50b7e75061
commit 37a152d1ae
3 changed files with 155 additions and 10 deletions
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20
samples/ApiDemos/res/layout/voice_recognition.xml
View File

@@ -33,6 +33,26 @@
android:layout_height="wrap_content"
android:text="@string/speak_button" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/supported_languages" />
<Spinner
android:id="@+id/supported_languages"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/language_preference" />
<TextView
android:id="@+id/language_preference"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<ListView android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="0dip"

2
samples/ApiDemos/res/values/strings.xml
View File

@@ -307,6 +307,8 @@
<string name="menu_from_xml_instructions_go_back">If you want to choose another menu resource, go back and re-run this activity.</string>
<string name="voice_recognition">App/Voice Recognition</string>
<string name="supported_languages">Supported languages</string>
<string name="language_preference">Voice Search in Settings</string>
<string name="text_to_speech">App/Text-To-Speech</string>
<string name="again">Again</string>

125
samples/ApiDemos/src/com/example/android/apis/app/VoiceRecognition.java
View File

@@ -19,16 +19,24 @@ package com.example.android.apis.app;
import com.example.android.apis.R;
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.os.Bundle;
import android.os.Handler;
import android.speech.RecognizerIntent;
import android.util.Log;
import android.view.View;
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;
import java.util.ArrayList;
import java.util.List;
@@ -38,16 +46,23 @@ import java.util.List;
*/
public class VoiceRecognition extends Activity implements OnClickListener {
private static final String TAG = "VoiceRecognition";
private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234;
private ListView mList;
private Handler mHandler;
private Spinner mSupportedLanguageView;
/**
* Called with the activity is first created.
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mHandler = new Handler();
// Inflate our UI from its XML layout description.
setContentView(R.layout.voice_recognition);
@@ -57,6 +72,8 @@ public class VoiceRecognition extends Activity implements OnClickListener {
mList = (ListView) findViewById(R.id.list);
mSupportedLanguageView = (Spinner) findViewById(R.id.supported_languages);
// Check to see if a recognition activity is present
PackageManager pm = getPackageManager();
List<ResolveInfo> activities = pm.queryIntentActivities(
@@ -67,6 +84,11 @@ public class VoiceRecognition extends Activity implements OnClickListener {
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();
}
/**
@@ -83,9 +105,29 @@ public class VoiceRecognition extends Activity implements OnClickListener {
*/
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);
intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Speech recognition demo");
// 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);
}
@@ -104,4 +146,85 @@ public class VoiceRecognition extends Activity implements OnClickListener {
super.onActivityResult(requestCode, resultCode, data);
}
private void refreshVoiceSettings() {
Log.i(TAG, "Sending broadcast");
sendOrderedBroadcast(RecognizerIntent.getVoiceDetailsIntent(this), 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>(this,
android.R.layout.simple_spinner_item, languages.toArray(
new String[languages.size()]));
mSupportedLanguageView.setAdapter(adapter);
}
private void updateLanguagePreference(String language) {
TextView textView = (TextView) 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(VoiceRecognition.this, text, 1000).show();
}
}
}