Android tutorial - android text to speech - Example - android app development - android studio - android development tutorial
Definition of TextToSpeech:
- Text-to-speech (TTS) is a type of speech synthesis application that is used to create a spoken sound version of the text in a computer document, such as a help file or a Web page.
- TTS can enable the reading of computer display information for the visually challenged person, or may simply be used to augment the reading of a text message.
- Current TTS applications include voice-enabled e-mail and spoken prompts in voice response systems.
- TTS is often used with voice recognition programs.
- There are numerous TTS products available, including Read Please 2000, Proverbe Speech Unit, and Next Up Technology's TextAloud.
- Lucent, Elan, and AT&T each have products called "Text-to-Speech."
- TextToSpeech class is responsible to convert text into speech.
- It provides a lot of methods to control the speech such as setSpeedRate(), setPitch() etc.
- In this example, we are going to see the android texttospeech example with speed and pitch option.
activity_main.xml
- Drag 2 textviews, 1 edittext, 1 spinner and 1 button for the layout. Now the activity_main.xml file will look like this:
File: activity_main.xml
<RelativeLayout xmlns:androclass="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<EditText
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView1"
android:layout_alignBottom="@+id/textView1"
android:layout_alignParentRight="true"
android:layout_marginRight="58dp"
android:ems="10" >
<requestFocus />
</EditText>
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/editText1"
android:layout_centerHorizontal="true"
android:layout_marginTop="28dp"
android:text="Speak" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/button1"
android:layout_marginTop="62dp"
android:layout_toLeftOf="@+id/editText1"
android:text="Speed:" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView2"
android:layout_alignParentTop="true"
android:layout_marginTop="42dp"
android:text="Text:" />
<Spinner
android:id="@+id/spinner1"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:layout_below="@+id/button1"
android:layout_centerHorizontal="true"
android:layout_marginTop="43dp" />
</RelativeLayout>
click below button to copy the code from android tutorial team
Activity class
- Let's see the code to speak the given text.
File: MainActivity.java
package com.example.texttospeechspeed;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import android.speech.tts.TextToSpeech;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.Toast;
public class MainActivity extends Activity implements
TextToSpeech.OnInitListener,OnItemSelectedListener {
/** Called when the activity is first created. */
private TextToSpeech tts;
private Button buttonSpeak;
private EditText editText;
private Spinner speedSpinner,pitchSpinner;
private static String speed="Normal";
@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);
speedSpinner = (Spinner) findViewById(R.id.spinner1);
//load data in spinner
loadSpinnerData();
speedSpinner.setOnItemSelectedListener(this);
//button click event
buttonSpeak.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
setSpeed();
speakOut();
}
});
}
@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", "This Language is not supported");
} else {
buttonSpeak.setEnabled(true);
speakOut();
}
} else { Log.e("TTS", "Initilization Failed!");}
}
@Override
public void onDestroy() {
// Don't forget to shutdown tts!
if (tts != null) {
tts.stop();
tts.shutdown();
}
super.onDestroy();
}
private void setSpeed(){
if(speed.equals("Very Slow")){
tts.setSpeechRate(0.1f);
}
if(speed.equals("Slow")){
tts.setSpeechRate(0.5f);
}
if(speed.equals("Normal")){
tts.setSpeechRate(1.0f);//default 1.0
}
if(speed.equals("Fast")){
tts.setSpeechRate(1.5f);
}
if(speed.equals("Very Fast")){
tts.setSpeechRate(2.0f);
}
//for setting pitch you may call
//tts.setPitch(1.0f);//default 1.0
}
private void speakOut() {
String text = editText.getText().toString();
tts.speak(text, TextToSpeech.QUEUE_FLUSH, null);
}
private void loadSpinnerData() {
//Data for speed Spinner
List<String> lables = new ArrayList<String>();
lables.add("Very Slow");
lables.add("Slow");
lables.add("Normal");
lables.add("Fast");
lables.add("Very Fast");
// Creating adapter for spinner
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item, lables);
// Drop down layout style - list view with radio button
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// attaching data adapter to spinner
speedSpinner.setAdapter(dataAdapter);
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position,
long id) {
// On selecting a spinner item
speed = parent.getItemAtPosition(position).toString();
Toast.makeText(parent.getContext(), "You selected: " + speed,
Toast.LENGTH_LONG).show();
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}