為Android詞典加入英語發聲功能

前文"使用Google Translate API編寫自己的Android詞典"介紹了如何使用Google的翻譯功能. "究竟"Android"如何讀? Text-To-Speech (TTS)"及"檢查語音合成功能, Text-To-Speech (TTS)"介紹了Android的檢查語音合成功能. 現在, 可以把它們集合起來, 為之前自己的Android詞典加入英語發聲功能.



參考"在Android應用程序內使用Google Translate API, google-api-translate-java", 下載並添加jar, 和在AndroidMainfest.xml文件中添加"android.permission.INTERNET"權限.

修改main.xml, 多添加一個英語發聲按鍵

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 >
<TextView
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="My English to Chinese Translate"
 />
<EditText
android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:id="@+id/texttotranlate"
/>
<Button
android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:enabled="false"
 android:text = "英語發聲"
 android:id="@+id/tospeech"
/>
<Button
android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text = "Translate"
 android:id="@+id/totranslate"
/>
<TextView
android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:id="@+id/comment"
/>
<TextView
android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:id="@+id/translatedtext"
/>
</LinearLayout>

修改主代碼.

package com.AndroidTranslate;

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.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.google.api.translate.Language;
import com.google.api.translate.Translate;


public class AndroidTranslate extends Activity implements OnInitListener{

 EditText textToTranlate;
 Button buttonToTranslate;
 Button buttonToSpeech;
 TextView textComment;
 TextView translatedText;

 final int MY_TTS_CHECK_CODE=1;
 private TextToSpeech myTTS;

 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.main);
  
     textToTranlate = (EditText)findViewById(R.id.texttotranlate);
     buttonToTranslate = (Button)findViewById(R.id.totranslate);
     buttonToSpeech = (Button)findViewById(R.id.tospeech);
     textComment = (TextView)findViewById(R.id.comment);
     translatedText = (TextView)findViewById(R.id.translatedtext);
  
     buttonToTranslate.setOnClickListener(buttonToTranslateOnClickListener);
     buttonToSpeech.setOnClickListener(buttonToSpeechOnClickListener);
  
     //Check if TextToSpeech Engine installed.
     Intent checkIntent = new Intent();
     checkIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
     startActivityForResult(checkIntent, MY_TTS_CHECK_CODE);
  
 }

 private Button.OnClickListener buttonToTranslateOnClickListener = new Button.OnClickListener(){

 @Override
 public void onClick(View v) {
  // TODO Auto-generated method stub
  String strTranslatedText = null;
  String strTextToTranlate = textToTranlate.getText().toString();
  Translate.setHttpReferrer("http://androidbiancheng.blogspot.com/");
 
  try {
   strTranslatedText = Translate.execute(strTextToTranlate, Language.ENGLISH, Language.CHINESE_TRADITIONAL);
   textComment.setText("Text Translated:");
   translatedText.setText(strTranslatedText);
  } catch (Exception e) {
   // TODO Auto-generated catch block
   textComment.setText("--- Error in Translate ---");
   translatedText.setText(null);
   e.printStackTrace();
  }
 
 }};

private Button.OnClickListener buttonToSpeechOnClickListener = new Button.OnClickListener(){

 @Override
 public void onClick(View arg0) {
  // TODO Auto-generated method stub
     String textToSpeech = textToTranlate.getText().toString();
     myTTS.setLanguage(Locale.ENGLISH);
     myTTS.speak(textToSpeech, TextToSpeech.QUEUE_ADD, null);
 }

};

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 // TODO Auto-generated method stub
   if (requestCode == MY_TTS_CHECK_CODE){
     if(resultCode==TextToSpeech.Engine.CHECK_VOICE_DATA_PASS){
      //TextToSpeech Engine installed.
      myTTS = new TextToSpeech(this, this);
     }else{
      //TextToSpeech Engine NOT installed, request to install.
      Intent installIntent = new Intent();
               installIntent.setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
               startActivity(installIntent);
     }
   }
}

@Override
public void onInit(int arg0) {
 // TODO Auto-generated method stub

 //Check if Language available
 switch(myTTS.isLanguageAvailable(Locale.ENGLISH)){
 case(TextToSpeech.LANG_AVAILABLE):
  buttonToSpeech.setEnabled(true);
  break;
 case(TextToSpeech.LANG_COUNTRY_AVAILABLE):
  buttonToSpeech.setEnabled(true);
  break;
 case(TextToSpeech.LANG_COUNTRY_VAR_AVAILABLE):
  buttonToSpeech.setEnabled(true);
  break;
 case(TextToSpeech.LANG_MISSING_DATA):
  buttonToSpeech.setEnabled(false);
  break;
 case(TextToSpeech.LANG_NOT_SUPPORTED):
  buttonToSpeech.setEnabled(false);
  break;
 default:
  buttonToSpeech.setEnabled(false);
  break;
   }
}

@Override
protected void onDestroy() {
 // TODO Auto-generated method stub
 super.onDestroy();
 myTTS.shutdown();
}


}