Ch15 Listings
satya - Saturday, February 27, 2010 10:09:33 PM
Listing 15-1
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity implements OnInitListener {
private EditText words = null;
private Button speakBtn = null;
private static final int REQ_TTS_STATUS_CHECK = 0;
private static final String TAG = "TTS Demo";
private TextToSpeech mTts;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
words = (EditText)findViewById(R.id.wordsToSpeak);
speakBtn = (Button)findViewById(R.id.speak);
speakBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
mTts.speak(words.getText().toString(), TextToSpeech.QUEUE_ADD, null);
}});
// Check to be sure that TTS exists and is okay to use
Intent checkIntent = new Intent();
checkIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
startActivityForResult(checkIntent, REQ_TTS_STATUS_CHECK);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQ_TTS_STATUS_CHECK) {
switch (resultCode) {
case TextToSpeech.Engine.CHECK_VOICE_DATA_PASS:
// TTS is up and running
mTts = new TextToSpeech(this, this);
Log.v(TAG, "Pico is installed okay");
break;
case TextToSpeech.Engine.CHECK_VOICE_DATA_BAD_DATA:
case TextToSpeech.Engine.CHECK_VOICE_DATA_MISSING_DATA:
case TextToSpeech.Engine.CHECK_VOICE_DATA_MISSING_VOLUME:
// missing data, install it
Log.v(TAG, "Need language stuff: " + resultCode);
Intent installIntent = new Intent();
installIntent.setAction(
TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
startActivity(installIntent);
break;
case TextToSpeech.Engine.CHECK_VOICE_DATA_FAIL:
default:
Log.e(TAG, "Got a failure. TTS apparently not available");
}
}
else {
// Got something else
}
}
@Override
public void onInit(int status) {
// Now that the TTS engine is ready, we enable the button
if( status == TextToSpeech.SUCCESS) {
speakBtn.setEnabled(true);
}
}
@Override
public void onPause()
{
super.onPause();
// if we're losing focus, stop talking
if( mTts != null)
mTts.stop();
}
@Override
public void onDestroy()
{
super.onDestroy();
mTts.shutdown();
}
}
satya - Saturday, February 27, 2010 10:10:32 PM
Listing 15-1 xml
<?xml version="1.0" encoding="utf-8"?>
<!-- This file is /res/layout/main.xml -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<EditText android:id="@+id/wordsToSpeak"
android:hinttext="Type words to speak here"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<Button android:id="@+id/speak"
android:text="Speak"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:enabled="false" />
</LinearLayout>
satya - Saturday, February 27, 2010 10:11:44 PM
Listing 15-2
import java.util.HashMap;
import java.util.StringTokenizer;
public class MainActivity extends Activity implements OnInitListener, OnUtteranceCompletedListener
private int uttCount = 0;
private int lastUtterance = -1;
private HashMap<String, String> params = new HashMap<String, String>();
@Override
public void onClick(View view) {
StringTokenizer st = new StringTokenizer(words.getText().toString(),",.");
while (st.hasMoreTokens()) {
params.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID,
String.valueOf(uttCount++));
mTts.speak(st.nextToken(), TextToSpeech.QUEUE_ADD, params);;
}
@Override
public void onInit(int status) {
// Now that the TTS engine is ready, we enable the button
if( status == TextToSpeech.SUCCESS) {
speakBtn.setEnabled(true);
mTts.setOnUtteranceCompletedListener(this);
}
}
@Override
public void onUtteranceCompleted(String uttId) {
Log.v(TAG, "Got completed message for uttId: " + uttId);
lastUtterance = Integer.parseInt(uttId);
}
satya - Saturday, February 27, 2010 10:12:18 PM
Listing 15-3
<?xml version="1.0" encoding="utf-8"?>
<!-- This file is /res/layout/main.xml -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<EditText android:id="@+id/wordsToSpeak"
android:text="Dohn Keyhotay"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<Button android:id="@+id/speakBtn"
android:text="Speak"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:enabled="false" />
<TextView android:id="@+id/filenameLabel"
android:text="Filename:"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<EditText android:id="@+id/filename"
android:text="/sdcard/donquixote.wav"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<Button android:id="@+id/recordBtn"
android:text="Record"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:enabled="false" />
<Button android:id="@+id/playBtn"
android:text="Play"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:enabled="false" />
<TextView android:id="@+id/useWithLabel"
android:text="Use with:"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<EditText android:id="@+id/realText"
android:text="Don Quixote"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<Button android:id="@+id/assocBtn"
android:text="Associate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:enabled="false" />
</LinearLayout>
satya - Saturday, February 27, 2010 10:13:16 PM
Listing 15-4
import java.io.File;
import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity implements OnInitListener {
private EditText words = null;
private Button speakBtn = null;
private EditText filename = null;
private Button recordBtn = null;
private Button playBtn = null;
private EditText useWith = null;
private Button assocBtn = null;
private String soundFilename = null;
private File soundFile = null;
private static final int REQ_TTS_STATUS_CHECK = 0;
private static final String TAG = "TTS Demo";
private TextToSpeech mTts = null;
private MediaPlayer player = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
words = (EditText)findViewById(R.id.wordsToSpeak);
filename = (EditText)findViewById(R.id.filename);
useWith = (EditText)findViewById(R.id.realText);
speakBtn = (Button)findViewById(R.id.speakBtn);
speakBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
mTts.speak(words.getText().toString(), TextToSpeech.QUEUE_ADD, null);
}});
recordBtn = (Button)findViewById(R.id.recordBtn);
recordBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
soundFilename = filename.getText().toString();
soundFile = new File(soundFilename);
if (soundFile.exists())
soundFile.delete();
if(mTts.synthesizeToFile(words.getText().toString(), null, soundFilename)
== TextToSpeech.SUCCESS) {
Toast.makeText(getBaseContext(),
"Sound file created",
Toast.LENGTH_SHORT).show();
playBtn.setEnabled(true);
assocBtn.setEnabled(true);
}
else {
Toast.makeText(getBaseContext(),
"Oops! Sound file not created",
Toast.LENGTH_SHORT).show();
}
}});
playBtn = (Button)findViewById(R.id.playBtn);
playBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
try {
player = new MediaPlayer();
player.setDataSource(soundFilename);
player.prepare();
player.start();
}
catch(Exception e) {
Toast.makeText(getBaseContext(),
"Hmmmmm. Can't play file",
Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}});
assocBtn = (Button)findViewById(R.id.assocBtn);
assocBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
mTts.addSpeech(useWith.getText().toString(), soundFilename);
Toast.makeText(getBaseContext(),
"Associated!",
Toast.LENGTH_SHORT).show();
}});
// Check to be sure that TTS exists and is okay to use
Intent checkIntent = new Intent();
checkIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
startActivityForResult(checkIntent, REQ_TTS_STATUS_CHECK);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQ_TTS_STATUS_CHECK) {
switch (resultCode) {
case TextToSpeech.Engine.CHECK_VOICE_DATA_PASS:
// TTS is up and running
mTts = new TextToSpeech(this, this);
Log.v(TAG, "Pico is installed okay");
break;
case TextToSpeech.Engine.CHECK_VOICE_DATA_BAD_DATA:
case TextToSpeech.Engine.CHECK_VOICE_DATA_MISSING_DATA:
case TextToSpeech.Engine.CHECK_VOICE_DATA_MISSING_VOLUME:
// missing data, install it
Log.v(TAG, "Need language stuff: " + resultCode);
Intent installIntent = new Intent();
installIntent.setAction(
TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
startActivity(installIntent);
break;
case TextToSpeech.Engine.CHECK_VOICE_DATA_FAIL:
default:
Log.e(TAG, "Got a failure. TTS apparently not available");
}
}
else {
// Got something else
}
}
@Override
public void onInit(int status) {
// Now that the TTS engine is ready, we enable buttons
if( status == TextToSpeech.SUCCESS) {
speakBtn.setEnabled(true);
recordBtn.setEnabled(true);
}
}
@Override
public void onPause()
{
super.onPause();
// if we're losing focus, stop playing
if(player != null) {
player.stop();
}
// if we're losing focus, stop talking
if( mTts != null)
mTts.stop();
}
@Override
public void onDestroy()
{
super.onDestroy();
if(player != null) {
player.release();
}
if( mTts != null) {
mTts.shutdown();
}
}
}
satya - Saturday, February 27, 2010 10:14:03 PM
Listing 15-5
<?xml version="1.0" encoding="utf-8"?>
<!-- This file is /res/layout/main.xml -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_height="fill_parent"
android:layout_width="fill_parent">
<EditText android:id="@+id/input"
android:hint="@string/input"
android:layout_height="wrap_content"
android:layout_width="fill_parent" />
<Spinner android:id="@+id/from"
android:layout_weight="1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/input"
android:prompt="@string/prompt" />
<Button android:id="@+id/translateBtn"
android:text="@string/translateBtn"
android:layout_weight="1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/input"
android:layout_toRightOf="@id/from"
android:enabled="false" />
<Spinner android:id="@+id/to"
android:layout_weight="1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/input"
android:layout_toRightOf="@id/translateBtn"
android:prompt="@string/prompt" />
<EditText android:id="@+id/translation"
android:hint="@string/translation"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:editable="false"
android:layout_below="@id/from" />
<TextView android:id="@+id/poweredBy"
android:text="powered by Google"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true" />
</RelativeLayout>
satya - Saturday, February 27, 2010 10:14:34 PM
Listing 15-6 a
<?xml version="1.0" encoding="utf-8"?>
<!-- This file is /res/values/strings.xml -->
<resources>
<string name="translateBtn">> Translate ></string>
<string name="input">Enter the text to translate</string>
<string name="translation">The translation will appear here</string>
<string name="prompt">Choose a language</string>
</resources>
satya - Saturday, February 27, 2010 10:15:01 PM
Listing 15-6 b
<?xml version="1.0" encoding="utf-8"?>
<!-- This file is /res/values/arrays.xml -->
<resources>
<string-array name="languages">
<item>Chinese</item>
<item>English</item>
<item>French</item>
<item>German</item>
<item>Japanese</item>
<item>Spanish</item>
</string-array>
<string-array name="language_values">
<item>zh</item>
<item>en</item>
<item>fr</item>
<item>de</item>
<item>ja</item>
<item>es</item>
</string-array>
</resources>
satya - Saturday, February 27, 2010 10:15:43 PM
Listing 15-7
// This file is ITranslate.aidl under /src
interface ITranslate {
String translate(in String text, in String from, in String to);
}
satya - Saturday, February 27, 2010 10:16:12 PM
Listing 15-7 java
// This file is TranslateService.java
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;
public class TranslateService extends Service {
public static final String TAG = "TranslateService";
private final ITranslate.Stub mBinder = new ITranslate.Stub() {
public String translate(String text, String from, String to) {
try {
return Translator.translate(text, from, to);
} catch (Exception e) {
Log.e(TAG, "Failed to translate: " + e.getMessage());
return null;
}
}
};
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
}
satya - Saturday, February 27, 2010 10:16:34 PM
Listing 15-8
// This file is Translator.java
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import org.apache.commons.lang.StringEscapeUtils;
import org.json.JSONObject;
import android.util.Log;
public class Translator {
private static final String ENCODING = "UTF-8";
private static final String URL_BASE = "http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&langpair=";
private static final String INPUT_TEXT = "&q=";
private static final String MY_SITE = �??http://my.website.com�?�;
private static final String TAG = "Translator";
public static String translate(String text, String from, String to) throws Exception {
try {
StringBuilder url = new StringBuilder();
url.append(URL_BASE).append(from).append("%7C").append(to);
url.append(INPUT_TEXT).append(URLEncoder.encode(text, ENCODING));
HttpURLConnection conn = (HttpURLConnection) new URL(url.toString())
.openConnection();
conn.setRequestProperty("REFERER", MY_SITE);
conn.setDoInput(true);
conn.setDoOutput(true);
try {
InputStream is= conn.getInputStream();
String rawResult = makeResult(is);
JSONObject json = new JSONObject(rawResult);
String result = ((JSONObject)json.get("responseData"))
.getString("translatedText");
return (StringEscapeUtils.unescapeXml(result));
} finally {
conn.getInputStream().close();
if(conn.getErrorStream() != null)
conn.getErrorStream().close();
}
} catch (Exception ex) {
throw ex;
}
}
private static String makeResult(InputStream inputStream) throws Exception {
StringBuilder outputString = new StringBuilder();
try {
String string;
if (inputStream != null) {
BufferedReader reader =
new BufferedReader(new InputStreamReader(inputStream, ENCODING));
while (null != (string = reader.readLine())) {
outputString.append(string).append('\n');
}
}
} catch (Exception ex) {
Log.e(TAG, "Error reading translation stream.", ex);
}
return outputString.toString();
}
}
satya - Saturday, February 27, 2010 10:17:05 PM
Listing 15-9
// This file is MainActivity.java
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
public class MainActivity extends Activity implements OnClickListener {
static final String TAG = "Translator";
private EditText inputText = null;
private TextView outputText = null;
private Spinner fromLang = null;
private Spinner toLang = null;
private Button translateBtn = null;
private String[] langShortNames = null;
private Handler mHandler = new Handler();
private ITranslate mTranslateService;
private ServiceConnection mTranslateConn = new ServiceConnection() {
public void onServiceConnected(ComponentName name, IBinder service) {
mTranslateService = ITranslate.Stub.asInterface(service);
if (mTranslateService != null) {
translateBtn.setEnabled(true);
} else {
translateBtn.setEnabled(false);
Log.e(TAG, "Unable to acquire TranslateService");
}
}
public void onServiceDisconnected(ComponentName name) {
translateBtn.setEnabled(false);
mTranslateService = null;
}
};
@Override
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
inputText = (EditText) findViewById(R.id.input);
outputText = (EditText) findViewById(R.id.translation);
fromLang = (Spinner) findViewById(R.id.from);
toLang = (Spinner) findViewById(R.id.to);
langShortNames = getResources().getStringArray(R.array.language_values);
translateBtn = (Button) findViewById(R.id.translateBtn);
translateBtn.setOnClickListener(this);
ArrayAdapter<?> fromAdapter = ArrayAdapter.createFromResource(this,
R.array.languages, android.R.layout.simple_spinner_item);
fromAdapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
fromLang.setAdapter(fromAdapter);
fromLang.setSelection(1); // English
ArrayAdapter<?> toAdapter = ArrayAdapter.createFromResource(this,
R.array.languages,android.R.layout.simple_spinner_item);
toAdapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
toLang.setAdapter(toAdapter);
toLang.setSelection(3); // German
inputText.selectAll();
Intent intent = new Intent(Intent.ACTION_VIEW);
bindService(intent, mTranslateConn, Context.BIND_AUTO_CREATE);
}
@Override
protected void onDestroy() {
super.onDestroy();
unbindService(mTranslateConn);
}
public void onClick(View v) {
if (inputText.getText().length() > 0) {
doTranslate();
}
}
private void doTranslate() {
mHandler.post(new Runnable() {
public void run() {
String result = "";
try {
int fromPosition = fromLang.getSelectedItemPosition();
int toPosition = toLang.getSelectedItemPosition();
String input = inputText.getText().toString();
if(input.length() > 5000)
input = input.substring(0,5000);
Log.v(TAG,"Translating from " + langShortNames[fromPosition] + " to " +
langShortNames[toPosition]);
result = mTranslateService.translate(input,
langShortNames[fromPosition],
langShortNames[toPosition]);
if (result == null) {
throw new Exception("Failed to get a translation");
}
outputText.setText(result);
inputText.selectAll();
} catch (Exception e) {
Log.e(TAG, "Error: " + e.getMessage());
}
}
});
}
}
satya - Saturday, February 27, 2010 10:17:40 PM
Listing 15-10
<?xml version="1.0" encoding="utf-8"?>
<!-- This file is AndroidManifest.xml -->
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.androidbook.translation"
android:versionName="1.0"
android:versionCode="1" >
<application android:label="Translate"
android:icon="@drawable/icon">
<activity android:name="MainActivity" android:label="Translate">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name="TranslateService" android:label="Translate">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</service>
</application>
<uses-permission android:name="android.permission.INTERNET" />
</manifest>
satya - Saturday, February 27, 2010 10:18:12 PM
Listing 15-10 a
// This file is TranslateService.java
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;
public class TranslateService extends Service {
public static final String TAG = "TranslateService";
private final ITranslate.Stub mBinder = new ITranslate.Stub() {
public String translate(String text, String from, String to) {
try {
return Translator.translate(text, from, to);
} catch (Exception e) {
Log.e(TAG, "Failed to translate: " + e.getMessage());
return null;
}
}
};
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
}
satya - Saturday, February 27, 2010 10:18:56 PM
Listing 15-10 b
// This file is Translator.java
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import org.apache.commons.lang.StringEscapeUtils;
import org.json.JSONObject;
import android.util.Log;
public class Translator {
private static final String ENCODING = "UTF-8";
private static final String URL_BASE = "http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&langpair=";
private static final String INPUT_TEXT = "&q=";
private static final String MY_SITE = �??http://my.website.com�?�;
private static final String TAG = "Translator";
public static String translate(String text, String from, String to) throws Exception {
try {
StringBuilder url = new StringBuilder();
url.append(URL_BASE).append(from).append("%7C").append(to);
url.append(INPUT_TEXT).append(URLEncoder.encode(text, ENCODING));
HttpURLConnection conn = (HttpURLConnection) new URL(url.toString()).openConnection();
conn.setRequestProperty("REFERER", MY_SITE);
conn.setDoInput(true);
conn.setDoOutput(true);
try {
InputStream is= conn.getInputStream();
String rawResult = makeResult(is);
JSONObject json = new JSONObject(rawResult);
String result = ((JSONObject)json.get("responseData"))
.getString("translatedText");
return (StringEscapeUtils.unescapeXml(result));
} finally {
conn.getInputStream().close();
if(conn.getErrorStream() != null)
conn.getErrorStream().close();
}
} catch (Exception ex) {
throw ex;
}
}
private static String makeResult(InputStream inputStream) throws Exception {
StringBuilder outputString = new StringBuilder();
try {
String string;
if (inputStream != null) {
BufferedReader reader =
new BufferedReader(new InputStreamReader(inputStream, ENCODING));
while (null != (string = reader.readLine())) {
outputString.append(string).append('\n');
}
}
} catch (Exception ex) {
Log.e(TAG, "Error reading translation stream.", ex);
}
return outputString.toString();
}
}