TTS(TextToSpeach)语音朗读实例

package cn.captain.texttospeach;

import java.util.Locale; 
  
 import android.app.Activity; 
 import android.os.Bundle; 
 import android.speech.tts.TextToSpeech; 
 import android.text.Editable; 
 import android.text.TextWatcher; 
 import android.view.View; 
 import android.widget.Button; 
 import android.widget.CheckBox; 
 import android.widget.EditText; 
 import android.widget.Toast; 
  
  
 public class TextToSpeachActivity extends Activity  
 { 
     private EditText mEditText = null; 
     private Button readButton = null; 
     private Button saveButton = null; 
     private CheckBox mCheckBox = null; 
     private TextToSpeech mTextToSpeech = null; 
      
     /** Called when the activity is first created. */
     @Override 
     public void onCreate(Bundle savedInstanceState)  
     { 
         super.onCreate(savedInstanceState); 
         setContentView(R.layout.main); 
        mEditText = (EditText)this.findViewById(R.id.edittext); 
         readButton = (Button)this.findViewById(R.id.rbutton); 
         saveButton = (Button)this.findViewById(R.id.sbutton); 
         mCheckBox = (CheckBox)this.findViewById(R.id.checkbox); 
        //实例并初始化TTS对象 
         mTextToSpeech = new TextToSpeech(this,new TextToSpeech.OnInitListener() 
        { 
             @Override 
             public void onInit(int status)  
             { 
                 // TODO Auto-generated method stub 
                 if(status == TextToSpeech.SUCCESS) 
                 { 
                	  int supported = mTextToSpeech.setLanguage(Locale.US);
                	  mTextToSpeech.setSpeechRate(1);
                	  if((supported != TextToSpeech.LANG_AVAILABLE)&&(supported != TextToSpeech.LANG_COUNTRY_AVAILABLE)) 
                	  { 
                	      displayToast("不支持当前语言！"); 
                	  } 

                 } 
             } 
              
         });      
         //朗读按钮监听 
         readButton.setOnClickListener(new View.OnClickListener()  
        { 
              
             @Override 
             public void onClick(View v)  
             { 
                 // TODO Auto-generated method stub 
                 //朗读EditText里的内容 
                 mTextToSpeech.speak(mEditText.getText().toString(), TextToSpeech.QUEUE_FLUSH, null); 
            } 
        }); 
         //保存按钮监听 
        saveButton.setOnClickListener(new View.OnClickListener()  
          { 
            @Override 
             public void onClick(View v)  
             { 
                 // TODO Auto-generated method stub 
                //将EditText里的内容保存为语音文件 
                int r = mTextToSpeech.synthesizeToFile(mEditText.getText().toString(), null, "/mnt/sdcard/speak.wav"); 
                if(r == TextToSpeech.SUCCESS) 
                     displayToast("保存成功！");                 
            } 
         }); 
         //EditText内容变化监听 
         mEditText.addTextChangedListener(mTextWatcher); 
          
      } 
      
      
     private TextWatcher mTextWatcher = new TextWatcher() 
    { 
  
         @Override 
        public void afterTextChanged(Editable s)  
         { 
            // TODO Auto-generated method stub 
            //如果是边写边读 
            if(mCheckBox.isChecked()&&(s.length()!=0)) 
            { 
                //获得EditText的所有内容 
                String t = s.toString();         
                 mTextToSpeech.speak(t.substring(s.length()-1), TextToSpeech.QUEUE_FLUSH, null); 
            } 
        } 
         @Override 
        public void beforeTextChanged(CharSequence s, int start, int count, 
                 int after)  
         { 
            // TODO Auto-generated method stub 
         } 
         @Override 
         public void onTextChanged(CharSequence s, int start, int before, 
                 int count)  
        { 
             // TODO Auto-generated method stub 
         } 
    };  
       
    //显示Toast函数 
     private void displayToast(String s) 
     { 
        Toast.makeText(TextToSpeachActivity.this, s, Toast.LENGTH_SHORT).show(); 
     } 
     
     
    @Override 
     public void onDestroy() 
     { 
        super.onDestroy(); 
          
         if(mTextToSpeech != null) 
             mTextToSpeech.shutdown();//关闭TTS 
     } 
 } 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <EditText
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/edittext"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/button" 
        android:id="@+id/rbutton"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="保存" 
        android:id="@+id/sbutton"/>
    <CheckBox  
         android:id="@+id/checkbox" 
         android:layout_width="fill_parent" 
         android:layout_height="wrap_content" 
         android:text="边写边读" 
         android:checked="true" 
         />  
    
</LinearLayout>

  <!-- 语音权限 -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>