android自学之TextToSpeech实现文字向语音的转换

 

package com.example.texttospeechexcercise;

import java.util.Locale;
import java.util.Random;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
import android.speech.tts.TextToSpeech;
import android.text.StaticLayout;
public class MainActivity extends Activity implements TextToSpeech.OnInitListener{

    String[] words=new String[]{"hello","dog","cat","bye"};
    //static final Random RANDOM=new Random();
    private TextToSpeech tSpeech;
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button=(Button) findViewById(R.id.button1);
        tSpeech=new TextToSpeech(getApplicationContext(), this);
        button.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                sayHello();
            }
        });

    }

    private void sayHello() {
        // TODO Auto-generated method stub
        int size=words.length;
        //返回一个伪随机数，它是取自此随机数生成器序列的、在 0（包括）和指定值（不包括）之间均匀分布的 int 值。
        //nextInt 的常规协定是，伪随机地生成并返回指定范围中的一个 int 值。所有可能的 n 个 int 值的生成概率（大致）相同。
        int i=new Random().nextInt(size);
        String word=words[i];
        tSpeech.speak(word,  TextToSpeech.QUEUE_FLUSH, null);
    }
    @Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        if (tSpeech!=null) {

            tSpeech.stop();
            tSpeech.shutdown();
        }

        super.onDestroy();
    }

    @Override
    public void onInit(int status) {
        // TODO Auto-generated method stub
        if (status==TextToSpeech.SUCCESS) {
        int result=tSpeech.setLanguage(Locale.US);
        if (result==TextToSpeech.LANG_MISSING_DATA||result==TextToSpeech.LANG_NOT_SUPPORTED) {
            Toast.makeText(getApplicationContext(), "Language is not available.",1000).show();
        }
        else {
            button.setEnabled(true);
            sayHello();
        }
        }else {
            Toast.makeText(getApplicationContext(), "init failed", 1000).show();
        }
        }
    }