IO -- (4) SDCARD

IO: 列出SDCARD裡的夾子與檔案 ＆ 讀取SDCARD裡某檔案的內容 

public class IO_ListSDCardFilesActivity extends Activity {
    /** Called when the activity is first created. */

private final String SD_PATH = Environment.getExternalStorageDirectory().getAbsolutePath();
private final String FILE_PATH = "/fileio";
private final String FILE_NAME = "test02.txt";
private final String ENCODING = "UTF-8";

FileInputStream fis = null; // 這裡要設定，否則無法用

TextView tv;
ListView lv;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
     
        tv = (TextView) findViewById(R.id.textView);
     
        //列出Sdcard 裡的夾子和檔案，放上LISTVIEW
        try {
        File sdcardPATH = Environment.getExternalStorageDirectory();// 找SD的入徑
        String [] fileNamesArrayStr = sdcardPATH.list(); // 用list(),將SD裡的資料夾和檔案以字串的方式收集在array
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, fileNamesArrayStr);// 以 listView 顯示在螢幕上
        lv = (ListView) findViewById(R.id.listView1);
        lv.setAdapter(adapter);
        } catch (Exception e) {
        e.printStackTrace();
        }
 
     
        readFile(); //讀出指定的檔到TEXTVIEW上
     
    }// end of onCreate
 
 
 
    public void readFile () {
   
    String result = "";
    try {
   
    File mFilePath = new File (SD_PATH + FILE_PATH);
    String mFileName = mFilePath + "/" + FILE_NAME;
    File fileText = new File (mFileName);
   
    fis = new FileInputStream(fileText);
    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();
}

IO: (6) + TTS 給英聽練習使用

IO + TTS : 給英聽練習使用


主程式：

//設計英語英聽口說練習

public class IO_TTS_EnglishSpeakingActivity 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 ENCODING = "UTF-8";

private File [] filesArray;

private File mDataPath;

private FileInputStream fis = null;

TextView tv;

ListView lv;

private String aFileName;

String [] strings;

 

private TextToSpeech mTTS;

private Button answerBtn;

private Button goBackBtn;

String result = "";

private static int NO_OF_QUESTIONS = 5;

private String [] questionsStr = new String [NO_OF_QUESTIONS];

private int flag; //判斷是否還留在原來的試卷裡

    @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);

        filesArray = mDataPath.listFiles();

        

        listFiles();//列出所有的檔案

        

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

        answerBtn = (Button) findViewById(R.id.button2);

        answerBtn.setOnClickListener(answerListener);

        

        goBackBtn = (Button) findViewById(R.id.goBackButton);

        goBackBtn.setOnClickListener (goBackListener);

        

        flag = 1;

           

    }// end of onCreate

    

    

    //列出所有英聽的檔案，顯示在ListView上

    private void 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 = ""; //會多出入徑的字串

        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);

    

    }// end of listFiles ();

    

    

    

// 看答案的按鈕

private OnClickListener answerListener = new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

if (questionsStr[0] == null) {

Toast.makeText(Cq_IO01Activity.this, "請選擇試卷！",

Toast.LENGTH_SHORT).show();

tv.setMarqueeRepeatLimit(-1);

} else if (flag == 1){

ArrayAdapter<String> adapter = new ArrayAdapter<String>(

Cq_IO01Activity.this,

android.R.layout.simple_list_item_1, questionsStr);

lv.setAdapter(adapter);

answerBtn.setText("不看題目");

answerBtn.setTextColor(Color.MAGENTA);

flag = 0;

} else if (flag == 0) {

listFiles();

answerBtn.setText("觀看題目");

answerBtn.setTextColor(Color.BLACK);

flag = 1;

}

}

};

    

    

  //按下按鈕回到原先列出全部英聽檔案的畫面

  private OnClickListener goBackListener = new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

if (mTTS != null) {

mTTS.stop();

}

listFiles();

tv.setText("請選擇下列試題卷練習英聽口說：");

tv.setTextColor(Color.RED);

tv.setMarqueeRepeatLimit(-1);

answerBtn.setText("觀看題目");

answerBtn.setTextColor(Color.BLACK);

}

};

  

  

    //選擇要唸出的檔案; 將內容的五個問題分別間隔唸出

    private OnItemClickListener listener = new OnItemClickListener() {

@Override

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

long id) {

// TODO Auto-generated method stub

aFileName = strings[position].toString();

tv.setText("正在播放 " + aFileName + " 練習，一共五題，每題播放兩次：");

tv.setTextColor(Color.GREEN);

tv.setMarqueeRepeatLimit(-1);

readSingleLine(aFileName); //讀出每個問題

}

};// end of listener

    

private void readSingleLine (String aFileName) {

try {

String mFileName = mDataPath + "/" + aFileName;

File fileContent = new File (mFileName);

fis = new FileInputStream(fileContent);

DataInputStream dis = new DataInputStream(fis);

for (int i = 0; i< NO_OF_QUESTIONS; i++) {

String tempStr = "";

tempStr = dis.readLine() + "\n";

questionsStr[i] = tempStr;

//讀出所選檔案的內容

mTTS.speak(tempStr, TextToSpeech.QUEUE_ADD, null); //用QUEUE_ADD可以再接其他的字串；queue＿flush將無法做到                                                       //唸第一次

mTTS.playSilence(2000, TextToSpeech.QUEUE_ADD, null);   //停頓兩秒

mTTS.speak(tempStr, TextToSpeech.QUEUE_ADD, null);        //唸第二次

mTTS.playSilence(2000, TextToSpeech.QUEUE_ADD, null);   //停頓兩秒

mTTS.speak("Please answer now.", TextToSpeech.QUEUE_ADD, null); //請使用者回答

mTTS.playSilence(8000, TextToSpeech.QUEUE_ADD, null);                  //給予八秒的時間回答

}

} catch (Exception e) {

e.printStackTrace();

}

}// end of readSingleLine ()

@Override

public void onInit(int status) {

// TODO Auto-generated method stub

if (status == TextToSpeech.SUCCESS) {

mTTS.setSpeechRate(0.9f);// 正常速度是 1.0f; 小過它會變慢

mTTS.speak("I'm ready for listening and speaking practice.", 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"

    android:background="@drawable/sunset" >

    <TextView

        android:id="@+id/textView01"

        android:layout_width="350px"

        android:layout_height="wrap_content"

        android:layout_gravity="center_horizontal"

        android:layout_marginTop="5dp"

        android:text="請選擇下列試題卷練習英聽口說："

        android:ellipsize="marquee"

        android:scrollHorizontally="true"

        android:singleLine="true"

        android:focusable="true"

        android:focusableInTouchMode="true"

        android:marqueeRepeatLimit="marquee_forever"

        android:textColor="#FF0000"

        android:textSize="22dp" />

    <ListView

        android:id="@+id/listView1"

        android:layout_width="match_parent"

        android:layout_height="75dp"

        android:layout_weight="0.70"

        

        android:divider="@drawable/list_item_divider"

        android:cacheColorHint="#00FF0000"

        android:dividerHeight="5px"    >

        

    </ListView>

    <LinearLayout

        android:id="@+id/linearLayout1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" >

        

        <Button

        android:id="@+id/button2"

        android:layout_width="150dp"

        android:layout_height="wrap_content"

        android:text="觀看題目" />

        

        <Button

        android:id="@+id/goBackButton"

        android:layout_width="150dp"

        android:layout_height="wrap_content"

        android:text="選擇新試卷" />

        

    </LinearLayout>

    

</LinearLayout>

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

res/drawable/list_item_divider:

<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android"

       android:shape="line" >

   <stroke 

       android:width="1dp"

       android:color="#8F8F8F"

       android:dashWidth="1dp"

       android:dashGap="1dp"/>

</shape>