IO --（5）讀出的檔案內容，套用TTS,將內容以機器合成聲音讀出

IO --（5）讀出的檔案內容，套用TTS,將內容以機器合成聲音讀出
                  設計讓練習英聽的學生使用


Manifest.xml:
加上：

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

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main.java: 主程式

public class IO_TTSActivity extends Activity implements OnInitListener{

    /** Called when the activity is first created. */

private final String SDCARD_PATH = Environment.getExternalStorageDirectory().getAbsolutePath();

private final String FILE_PATH = "/fileio";

// private final String FILE_NAME = "test03.txt";

private final String ENCODING = "UTF-8";

private File mDataPath;

private FileInputStream fis = null;

TextView tv;

ListView lv;

String [] strings;

 

private TextToSpeech mTTS;

private Button listenBtn;

String result = "";

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        

        tv= (TextView) findViewById(R.id.textView01);

        tv.setMovementMethod(ScrollingMovementMethod.getInstance());

        

        mDataPath = new File (SDCARD_PATH + FILE_PATH);

        File [] filesArray = mDataPath.listFiles();

        

        String fileNames = ""; // to receive every single file name

        for (int i = 0; i < filesArray.length; i++) {

        if (filesArray[i].isFile()) { //get rid of directories

        String tempStr = ""; //會多出入境的字串

        tempStr = filesArray[i].toString();

        String strSub = ""; //to subtract the uneccessary part: /mnt/sdcard/fileio/ (19 個字元)

        strSub = tempStr.substring(19, tempStr.length()).toString();

        fileNames += strSub + "--";

        }

        }

        

        //Handle to subtraction of the final "--" in fileNames string

        String result = "";

        result = fileNames.substring(0, fileNames.length()-2);

        strings = TextUtils.split(result, "--");

        

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, strings);

        lv = (ListView) findViewById(R.id.listView1);

        lv.setAdapter(adapter);

        lv.setOnItemClickListener(listener);

        

        mTTS = new TextToSpeech(getApplicationContext(), this);//初始化

        listenBtn = (Button) findViewById(R.id.button1);

        listenBtn.setOnClickListener(btnListener);

        

    }// end of onCreate

    

    

    //選擇要唸出的檔案

    private OnItemClickListener listener = new OnItemClickListener() {

@Override

public void onItemClick(AdapterView<?> parent, View view, int position,

long id) {

// TODO Auto-generated method stub

tv.setText(""); // clean tv in case of left-over

String aFileName = strings[position].toString();

readFile(aFileName);//Method: read the content of a file

//讀出所選檔案的內容；用QUEUE_ADD可以再接其他的字串；QUEUE_FLUSH將無法做到

mTTS.speak(result, TextToSpeech.QUEUE_ADD, null);

mTTS.playSilence(5000, TextToSpeech.QUEUE_ADD, null); //休息五秒

mTTS.speak(result, TextToSpeech.QUEUE_ADD, null); //又重複將內容朗誦一遍

}

};// end of listener

    

//看答案的按鈕

private OnClickListener btnListener = new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

tv.setText(result);

}

};

//讀出檔案的內容

private void readFile(String aFileName) {

try {

String mFileName = mDataPath + "/" + aFileName;

File fileContent = new File (mFileName);

fis = new FileInputStream(fileContent);

int length = fis.available();

byte [] buffer = new byte [length];

fis.read(buffer);

result = EncodingUtils.getString(buffer, ENCODING);

fis.close();

//tv.setText(result);

}catch (Exception e) {

e.printStackTrace();

}

} //end of readFile()

@Override

public void onInit(int status) {

// TODO Auto-generated method stub

if (status == TextToSpeech.SUCCESS) {

mTTS.speak("I'm ready", TextToSpeech.QUEUE_FLUSH, null);

}else {

System.out.println("Oops!");

}

}

@Override

protected void onDestroy() {

// TODO Auto-generated method stub

super.onDestroy();

mTTS.shutdown();

}

@Override

protected void onPause() {

// TODO Auto-generated method stub

super.onPause();

if (mTTS != null) {

mTTS.stop();

}

}

}

****************************************

res/layout/main.xml:

<?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" >

    <TextView

        

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginTop="5dp"

        android:textColor="#FF0000"

        android:textSize="20dp"

        android:text="選擇下列檔案練習英聽：" />

    <TextView

        android:id="@+id/textView01"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:layout_marginTop="5dp"

        android:maxLines="15"

        android:scrollbarStyle="outsideInset"

        android:scrollbars="vertical"

        android:singleLine="false"

        android:text=""

        android:textColor="#00FF00"

        android:textSize="20dp" />

     <Button

        android:id="@+id/button1"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="看答案！" />

    

    <ListView

        android:id="@+id/listView1"

        android:layout_width="match_parent"

        android:layout_height="300dp"

        android:layout_weight="0.85" >

    </ListView>

   

</LinearLayout>