package com.example.androidttsdemothird;

import java.util.HashMap;
import java.util.Locale;
import java.util.StringTokenizer;

import android.os.Bundle;
import android.app.Activity;
import android.content.SharedPreferences;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.speech.tts.TextToSpeech.OnUtteranceCompletedListener;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity implements OnInitListener,
		OnUtteranceCompletedListener {

	private EditText inputText = null;
	private Button speakBtn = null;
	private TextToSpeech mTts;
	private static final String TAG = "TTS Demo";
	private static final String STORE_NAME = "preferenceFile";
	private static final String loveConfession = "你好, you had me at hello. To the world you maybe one person, but to one person you maybe the world. Please believe me, I was prepared for everything,except you. I love that you are the last person I want to talk to before I go to sleep at night. Love means never having to say you're sorry. So choose me. Marry me. Let me make you happy. ";
	private String[] loveArray;
	private int lastUtterance = -1;
	private HashMap<String, String> params = new HashMap<String, String>();

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		// 创建TextToSpeech实例，初始化完成后会调用OnInitListener（第二个参数）的回调函数
		mTts = new TextToSpeech(this, this // TextToSpeech.OnInitListener
		);
		
		//设置控件
        inputText = (EditText)findViewById(R.id.inputText);
        speakBtn = (Button)findViewById(R.id.speakBtn);
       
	    inputText.setText(loveConfession);  
        speakBtn.setOnClickListener(new OnClickListener() {		
			public void onClick(View v) {
				// TODO Auto-generated method stub
				//处理输入框里的内容
				StringTokenizer loveTokens = new StringTokenizer(inputText.getText().toString(),",.");
				int i = 0;
				loveArray = new String[loveTokens.countTokens()];
				while(loveTokens.hasMoreTokens())
				{
					loveArray[i++] = loveTokens.nextToken();
				}
				//朗读输入框里的内容
				speakText();
			}
		});
	}

	private void speakText() {
		lastUtterance++;
		if(lastUtterance >= loveArray.length)
		{
			lastUtterance = 0;
		}
		Log.v(TAG, "the begin utterance is " + lastUtterance);
		for(int i = lastUtterance; i < loveArray.length; i++)
		{
			//为每个语音片段都设置一个标记
			params.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, String.valueOf(i));
			mTts.speak(loveArray[i], TextToSpeech.QUEUE_ADD, params);
		}
	}

	@Override
	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);
			//设置发音语言
			if(result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED)
			//判断语言是否可用
			{
				Log.v(TAG, "Language is not available");
				speakBtn.setEnabled(false);
			}
			else
			{
				speakBtn.setEnabled(true);
				//设置一个语音片段结束后的回调函数
				mTts.setOnUtteranceCompletedListener(this);
			}
		}	
	}

	@Override
	public void onUtteranceCompleted(String utteranceId) {
		// TODO Auto-generated method stub
		//一个语音片段结束后的回调函数
		Log.v(TAG, "Get completed message for the utteranceId " + utteranceId);
		//用lastUtterance记录当前结束的语音片段
		lastUtterance = Integer.parseInt(utteranceId);
	}
	
	@Override
	protected void onDestroy() {
		// TODO Auto-generated method stub
		//释放TTS的资源
		if(mTts != null)
		{
			mTts.stop();
			mTts.shutdown();
		}
		//保存lastUtterance值
		SharedPreferences settings = getSharedPreferences(STORE_NAME, 0);
		SharedPreferences.Editor editor = settings.edit();
		editor.putInt("lastUtterance", lastUtterance);
		editor.commit();
		Log.v(TAG, "the stored lastUtterance is " + lastUtterance);
		
		super.onDestroy();
	}

}