Android TTS 實戰(zhàn)之愛你一萬年

把合成的語音以音頻文件的形式保存在系統(tǒng)里，然后就可以直接用播放音頻文件的方式來播放。

這個功能調(diào)用的函數(shù)為：

public?int??synthesizeToFile?(?String??text,??HashMap?<?String?,??String?>?params,?String??filename)

第一個參數(shù)為要進行語音合成的文本；第二個參數(shù)我們在上一個Demo中有所介紹，是一個鍵值對形式的HashMap類型變量，可以設置語音片段的ID等；第三個參數(shù)為保存到系統(tǒng)中的文件名。

當你想和朋友分享一份精彩的文本合成語音后的效果時，你可以使用這個功能把它保存為音頻文件發(fā)送給朋友，這樣即使朋友的手機不具備TTS功能，也可以用播放音頻的方式分享到；當你要對同一段較長的文本多次進行語音合成時，你可以把這段文本的語音保存為音頻文件，然后使用時播放，這樣會更省資源，運行速度更快,因為使用TTS是比較費資源的一個過程。因此我們會在某些場合用到這個功能。

下面我們就用這個功能完成一個Demo例子，當你害羞當面向她表白你對她的喜歡時，讓Android幫你語音合成你想說的話，然后你就可以向她發(fā)送保存了對她喜歡的這個音頻文件。

布局代碼：

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Java代碼：

package?com.example.androidttsdemo3;

import?java.util.Locale;
import?android.app.Activity;
import?android.content.Intent;
import?android.os.Bundle;
import?android.speech.tts.TextToSpeech;
import?android.speech.tts.TextToSpeech.OnInitListener;
import?android.util.Log;
import?android.view.View;
import?android.view.View.OnClickListener;
import?android.widget.Button;
import?android.widget.EditText;
import?android.widget.Toast;
import?android.media.MediaPlayer?;
import?java.io.File;

public?class?MainActivity?extends?Activity?implements?OnInitListener{
????//實現(xiàn)初始接口
????/**?Called?when?the?activity?is?first?created.?*/
????//定義變量
????private?EditText?inputText?=?null;
????private?Button?speakBtn?=?null;
????private?EditText?filenameText?=?null;
????private?Button?recordBtn?=?null;
????private?Button?playBtn?=?null;
????private?TextToSpeech?mTts;
????private?static?final?String?TAG?=?"TTS?Demo";
????private?static?final?String?loveConfession?=?"Lan?Hua,?I?love?you.?";
????private?String?loveFileName?=?null;
????private?File?loveFile?=?null;
????private?MediaPlayer?player?=?null;

????@Override
????public?void?onCreate(Bundle?savedInstanceState)?{
????????super.onCreate(savedInstanceState);
????????setContentView(R.layout.fragment_main);
????????//創(chuàng)建TextToSpeech實例，初始化完成后會調(diào)用OnInitListener（第二個參數(shù)）的回調(diào)函數(shù)
????????mTts?=?new?TextToSpeech(this,
????????????????this??//?TextToSpeech.OnInitListener
????????);
????????//設置控件
????????inputText?=?(EditText)findViewById(R.id.inputText);
????????speakBtn?=?(Button)findViewById(R.id.speakBtn);
????????filenameText?=?(EditText)findViewById(R.id.filenameText);
????????recordBtn?=?(Button)findViewById(R.id.recordBtn);
????????playBtn?=?(Button)findViewById(R.id.playBtn);

????????inputText.setText(loveConfession);
????????filenameText.setText("/sdcard/love.wav");
????????speakBtn.setOnClickListener(new?OnClickListener()?{
????????????public?void?onClick(View?v)?{
????????????????//?TODO?Auto-generated?method?stub
????????????????//朗讀輸入框里的內(nèi)容
????????????????mTts.speak(inputText.getText().toString(),?TextToSpeech.QUEUE_ADD,?null);
????????????}
????????});
????????recordBtn.setOnClickListener(new?OnClickListener()?{
????????????@Override
????????????public?void?onClick(View?v)?{
????????????????//?TODO?Auto-generated?method?stub
????????????????//把TTS語音合成的結果保存為音頻文件
????????????????loveFileName?=?filenameText.getText().toString();
????????????????loveFile?=?new?File(loveFileName);
????????????????if(loveFile.exists())
????????????????{
????????????????????loveFile.delete();
????????????????}
????????????????//把語音合成的結果保存到文件中
????????????????if(TextToSpeech.SUCCESS?==?mTts.synthesizeToFile(inputText.getText().toString(),?null,?loveFileName))
????????????????{
????????????????????Toast.makeText(getBaseContext(),?"sound?file?created!",?Toast.LENGTH_SHORT).show();
????????????????????playBtn.setEnabled(true);
????????????????}
????????????????else
????????????????{
????????????????????Toast.makeText(getBaseContext(),?"failed?to?create?sound?file!",?Toast.LENGTH_SHORT).show();
????????????????}
????????????}
????????});
????????playBtn.setOnClickListener(new?OnClickListener()?{
????????????@Override
????????????public?void?onClick(View?v)?{
????????????????//?TODO?Auto-generated?method?stub
????????????????//播放保存著的音頻文件
????????????????try
????????????????{
????????????????????player?=?new?MediaPlayer();
????????????????????player.setDataSource(loveFileName);
????????????????????player.prepare();
????????????????????player.start();
????????????????}
????????????????catch?(Exception?e)?{
????????????????????//?TODO:?handle?exception
????????????????????Toast.makeText(getBaseContext(),?"failed?to?play?sound?file!",?Toast.LENGTH_SHORT).show();
????????????????????e.printStackTrace();
????????????????}
????????????}
????????});
????}

????public?void?onInit(int?status)?{
????????//?TODO?Auto-generated?method?stub
????????//TTS?Engine初始化完成
????????if(status?==?TextToSpeech.SUCCESS)
????????{
????????????int?result?=?mTts.setLanguage(Locale.US);
????????????//設置發(fā)音語言
????????????if(result?==?TextToSpeech.LANG_MISSING_DATA?||?result?==?TextToSpeech.LANG_NOT_SUPPORTED)
????????????//判斷語言是否可用
????????????{
????????????????Log.v(TAG,?"Language?is?not?available");
????????????????speakBtn.setEnabled(false);
????????????}
????????????else
????????????{
????????????????speakBtn.setEnabled(true);
????????????}
????????}
????}

????@Override
????protected?void?onDestroy()?{
????????//?TODO?Auto-generated?method?stub
????????//釋放TTS的資源
????????if(mTts?!=?null)
????????{
????????????mTts.stop();
????????????mTts.shutdown();
????????}
????????super.onDestroy();
????}
}