Android technology sharing - text-to-speech and read aloud

Android technology sharing - text-to-speech and read aloud

I'm working on a project recently, and there is a function that needs to convert text into speech and play it out. Below I will share my approach.

It is very pleasing that the Androidsystem is now integrated TTSand provides relevant libraries for us to call, so we don't have to search for third-party libraries everywhere, just import them directly android.speech.tts.TextToSpeech.

//import the package of TTS
import android.speech.tts.TextToSpeech;  
//Define a tts object
private TextToSpeech tts;

　　

Second, to instantiate this object requires two parameters, one is the Contextobject, and the other is TextToSpeechthe listener object corresponding to the class: the OnLnitListenerobject. The general Contextobject is passed into the current one Activity, and OnLnitListeneryou can write your own class inheritance and implement its methods.

//Import the listener package
import android.speech.tts.TextToSpeech.OnInitListener;  

//Initialize the tts listener object
tts = new TextToSpeech(this, OnInitListener);  

　　

OnLnitListenerAs long as there is a onInitmethod in the interface, its function is to ttsinitialize the object, set the language, and determine whether the text is successfully converted and whether the current system supports the language.

@Override  
public void onInit(int status){  
    // Determine if the conversion is successful  
    if (status == TextToSpeech.SUCCESS){  
        //The default language is Chinese, the native android does not seem to support Chinese.
        int result = tts.setLanguage(Locale.CHINESE);  
        if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED){  
            Toast.makeText(MainActivity.this, R.string.notAvailable, Toast.LENGTH_SHORT).show();  
        }else{
            //Set the language to English if Chinese is not supported
            tts.setLanguage(Locale.US);
        }  
    }  
}  

　　

Finally, just call the tts-to-text-to-speech method when appropriate.

tts.speak("Text to be converted", TextToSpeech.QUEUE_FLUSH, null);  

　　

The following is a demo written:

MainActivity.java:

/**
 * Author: sandy
 * QQ technical exchange group: 439261058
 * WeChat Official Account: Between Codes (codestravel)
**/
package com.example.ct_text2speechdemo;

import java.util.Locale;
import android.os.Bundle;
import android.app.Activity;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements OnInitListener{
    //Define the control
    private Button speechButton;  
    private TextView speechText;  
    private TextToSpeech tts;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate (savedInstanceState);
        setContentView(R.layout.activity_main);
        //Initialize TTS
        tts = new TextToSpeech(this, this);
        //get the control
        speechText = (TextView)findViewById(R.id.speechTextView);  
        speechButton = (Button)findViewById(R.id.speechButton);  
        //Add listener for button
        speechButton.setOnClickListener(new OnClickListener(){   
            @Override  
            public void onClick(View v){  
                // TODO Auto-generated method stub  
                tts.speak(speechText.getText().toString(), TextToSpeech.QUEUE_FLUSH, null);  
            }  
        });  
        
    }
    
    @Override  
    public void onInit(int status){  
        // Determine if the conversion is successful  
        if (status == TextToSpeech.SUCCESS){  
            //The default language is Chinese, the native android does not seem to support Chinese.
            int result = tts.setLanguage(Locale.CHINESE);  
            if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED){  
                Toast.makeText(MainActivity.this, R.string.notAvailable, Toast.LENGTH_SHORT).show();  
            }else{
                //Set the language to English if Chinese is not supported
                tts.setLanguage(Locale.US);
            }  
        }  
    }  

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
}

　　

For the complete code, see  https://github.com/codestravel/CT_Android_demos/tree/master/CT_Text2SpeechDemo

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