What is text to speech android
The TextToSpeech class in Android is used to convert a text into speech. We can also playback the speech and can create a sound file, once the text is converted to speech.
The constructor of the TextToSpeech class:
TextToSpeech(Context context, TextToSpeech.OnInitListener)
Methods of TextToSpeech class:
The Android TextToSpeech class contains various methods. The popular methods of the TextToSpeech class are described below. These are:
| Method | Uses |
| int speak (String text, int queueMode, HashMap params) | Used to convert the text into speech. Queue Mode: QUEUE_ADD or QUEUE_FLUSH. Request parameters: null, KEY_PARAM_STREAM, KEY_PARAM_VALUME etc. |
| int setSpeechRate(float speed) | Used to set the speed for the speech. |
| int setPitch(float speed) | Used to set the pitch for the speech. |
| int setLanguage (Locale loc) | Used to set the locale specific language for the speech. |
| void shutdown() | Used to release the resource set by TextToSpeech Engine. |
| int stop() | Used to interrupt the current utterance, whether it is played or rendered to file and to discard the other utterances in the queue. |
TextToSpeech.OnInitListener Interface:
To perform event handling on the TextToSpeech engine, the TextToSpeech.OnInitListener interface needs to be implemented.
Method of TextToSpeech.OnInitListener Interface:
TextToSpeech.OnInitListener interface contains only one method. It is described below.
| Method | Uses |
| void onInit (int status) | Used to signal the completion of the TextToSpeech engine initialization. Value of the status parameter: SUCCESS or ERROR. |
Android TextToSpeech Example 1:
In the below example, we are demonstrating the usage of the Android TextToSpeech class to convert a text into speech.
activity_main.xml:
In the activity_main.xml file, we will drag a TextView, an EditText, and a button from the palette.
Activity class:(File: MainActivity.java)
In the MainActivity. java file, we will write the code to speak the written text.
package com.example.radioapp;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import java.util.Locale;
import android.app.Activity;
import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity implements
TextToSpeech.OnInitListener {
/** Called when the activity is first created. */
private TextToSpeech tts;
private Button buttonSpeak;
private EditText editText;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tts = new TextToSpeech(this, this);
buttonSpeak = (Button) findViewById(R.id.button1);
editText = (EditText) findViewById(R.id.editText1);
buttonSpeak.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
speakOut();
}
});
}
@Override
public void onDestroy() {
// Don't forget to shutdown tts!
if (tts != null) {
tts.stop();
tts.shutdown();
}
super.onDestroy();
}
@Override
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS) {
int result = tts.setLanguage(Locale.US);
if (result == TextToSpeech.LANG_MISSING_DATA
|| result == TextToSpeech.LANG_NOT_SUPPORTED) {
Log.e("TTS", "Language not supported");
} else {
buttonSpeak.setEnabled(true);
speakOut();
}
} else {
Log.e("TTS", "Failed!");
}
}
private void speakOut() {
String text = editText.getText().toString();
tts.speak(text, TextToSpeech.QUEUE_FLUSH, null);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu, menu);
return true;
}
} |
0 comments