package com.example.testxunfeitts;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 MainActivity extends Activity {private EditText mEditText = null; private Button readButton = null; private Button saveButton = null; private CheckBox mCheckBox = null; private TextToSpeech mTextToSpeech=null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_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() {@Overridepublic void onInit(int status) {if (status==TextToSpeech.SUCCESS) {//设置朗读语言int supported=mTextToSpeech.setLanguage(Locale.US);if ((supported!=TextToSpeech.LANG_AVAILABLE)&&(supported!=TextToSpeech.LANG_COUNTRY_AVAILABLE)) {Toast.makeText(MainActivity.this, "不支持当前语言！", 1).show();}}}});//朗读监听按钮readButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {//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() {@Overridepublic void onClick(View arg0) {//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) {Toast.makeText(MainActivity.this, "保存成功！", 1).show();}}});//EditText内容变化监听
      mEditText.addTextChangedListener(mTextWatcher); }@Overrideprotected void onDestroy() {super.onDestroy();if (mTextToSpeech!=null) {mTextToSpeech.shutdown();//关闭TTS
        }}private TextWatcher mTextWatcher = new TextWatcher(){@Overridepublic void afterTextChanged(Editable s) {//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); }}@Overridepublic void beforeTextChanged(CharSequence s, int start, int before,int count) {// TODO Auto-generated method stub
            }@Overridepublic void onTextChanged(CharSequence s, int start, int before,int count) {// TODO Auto-generated method stub
            }        };
}