In Android 1.6 (SDK API level 4) the text to speech (TTS) engine was introduced. We can use this API to
produce speech synthesis from within our applications, allowing the application to ‘‘talk’’ to your users.
Before using the TTS engine, it’s good practice to confirm the language packs are installed or not, if not installed we must install the language pack.
Once you’ve confirmed the voice data is available, you need to create and initialize a new TextToSpeech
instance. Note that you cannot use the new Text To Speech object until initialization is complete.
public void onInit(int status)
{
if (status == TextToSpeech.SUCCESS)
{
// ready to Speak
}
}
When Text To Speech has been initialized you can use the speak method to synthesize voice using the
default device audio output.
tts.speak("Text to Speak", TextToSpeech.QUEUE_FLUSH, null)
In the example we have an EditText , in which user enters the text and when clicks on Button we c all speakTheText() method to speak the entered Text.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#D1FFFF"
android:orientation="vertical">
<TextView
android:id="@+id/textView1"
android:layout_marginTop="120dp"
android:gravity="center_horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="34dp"
android:textStyle="bold"
android:text="Text To Speech Tutorial" />
<EditText
android:id="@+id/editTextToSpeech"
android:layout_marginTop="20dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="20dp"
android:hint="Enter the text to speak"
android:ems="10" >
<requestFocus />
</EditText>
<Button
android:id="@+id/buttonSpeak"
android:layout_marginTop="30dp"
android:textSize="25dp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Speak Now" />
</LinearLayout>
public class MainActivity extends Activity implements TextToSpeech.OnInitListener
{
EditText editText;
Button buttonSpeak;
TextToSpeech tts ;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tts = new TextToSpeech(this, this);
editText =(EditText)findViewById(R.id.editTextToSpeech);
buttonSpeak =(Button)findViewById(R.id.buttonSpeak);
buttonSpeak.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
speakTheText();
}
});
}
@Override
public void onDestroy()
{
// Do Not forget to Stop the TTS Engine when you do not require it
if (tts != null)
{
tts.stop();
tts.shutdown();
}
super.onDestroy();
}
public void onInit(int status)
{
if (status == TextToSpeech.SUCCESS)
{
int result = tts.setLanguage(Locale.GERMAN);
if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED)
{
Toast.makeText(this, "This Language is not supported", Toast.LENGTH_LONG).show();
}
else
{
Toast.makeText(this, "Ready to Speak", Toast.LENGTH_LONG).show();
speakTheText();
}
}
else
{
Toast.makeText(this, "Can Not Speak", Toast.LENGTH_LONG).show();
}
}
private void speakTheText()
{
String textToSpeak = editText.getText().toString();
tts.speak(textToSpeak, TextToSpeech.QUEUE_FLUSH, null);
}
}
produce speech synthesis from within our applications, allowing the application to ‘‘talk’’ to your users.
Before using the TTS engine, it’s good practice to confirm the language packs are installed or not, if not installed we must install the language pack.
Once you’ve confirmed the voice data is available, you need to create and initialize a new TextToSpeech
instance. Note that you cannot use the new Text To Speech object until initialization is complete.
public void onInit(int status)
{
if (status == TextToSpeech.SUCCESS)
{
// ready to Speak
}
}
When Text To Speech has been initialized you can use the speak method to synthesize voice using the
default device audio output.
tts.speak("Text to Speak", TextToSpeech.QUEUE_FLUSH, null)
Android Text To Speech Example:
In the example we have an EditText , in which user enters the text and when clicks on Button we c all speakTheText() method to speak the entered Text.
main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#D1FFFF"
android:orientation="vertical">
<TextView
android:id="@+id/textView1"
android:layout_marginTop="120dp"
android:gravity="center_horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="34dp"
android:textStyle="bold"
android:text="Text To Speech Tutorial" />
<EditText
android:id="@+id/editTextToSpeech"
android:layout_marginTop="20dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="20dp"
android:hint="Enter the text to speak"
android:ems="10" >
<requestFocus />
</EditText>
<Button
android:id="@+id/buttonSpeak"
android:layout_marginTop="30dp"
android:textSize="25dp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Speak Now" />
</LinearLayout>
MainActivity.java
public class MainActivity extends Activity implements TextToSpeech.OnInitListener
{
EditText editText;
Button buttonSpeak;
TextToSpeech tts ;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tts = new TextToSpeech(this, this);
editText =(EditText)findViewById(R.id.editTextToSpeech);
buttonSpeak =(Button)findViewById(R.id.buttonSpeak);
buttonSpeak.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
speakTheText();
}
});
}
@Override
public void onDestroy()
{
// Do Not forget to Stop the TTS Engine when you do not require it
if (tts != null)
{
tts.stop();
tts.shutdown();
}
super.onDestroy();
}
public void onInit(int status)
{
if (status == TextToSpeech.SUCCESS)
{
int result = tts.setLanguage(Locale.GERMAN);
if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED)
{
Toast.makeText(this, "This Language is not supported", Toast.LENGTH_LONG).show();
}
else
{
Toast.makeText(this, "Ready to Speak", Toast.LENGTH_LONG).show();
speakTheText();
}
}
else
{
Toast.makeText(this, "Can Not Speak", Toast.LENGTH_LONG).show();
}
}
private void speakTheText()
{
String textToSpeak = editText.getText().toString();
tts.speak(textToSpeak, TextToSpeech.QUEUE_FLUSH, null);
}
}
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