Android tutorial - android text to speech - Example - android app development - android studio - android development tutorial



Definition of TextToSpeech:

 texttospeech dialogbox
  • 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.
  •  Android text to speech examples
  • 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.
 process of text to speech
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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

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<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>  
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Activity class

  • Let's see the code to speak the given text.

File: MainActivity.java

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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;  
}  
  
}  
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