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>

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"/>

＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊
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>

IO: (2) SDCARD

IO: (2) 僅列出SDCARD裡檔案的名稱（不包括資料夾）


public class OnlyFileNamesInSDCardActivity 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;

TextView tv;
ListView lv;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
     
     
     
        //列出Sdcard 裡的夾子和檔案，放上LISTVIEW
        try {
                //找出SD的入徑
        File sdcardPATH = Environment.getExternalStorageDirectory();
               //用list(),將SD裡的資料夾和檔案以字串的方式收集在array
//         String [] fileNamesArrayStr = sdcardPATH.list(); 

        //listFiles()則會加上完整入徑，列出入徑及資料夾＋檔名的集合，存在File格是的陣列
        File [] fileArray = sdcardPATH.listFiles();
         /*** 如果要制訂特別的入徑 ***/
        // File myDataPath = new File (sdcardPATH.getAbsolutePath() + "/fileio");
        // File [] fileArray = myDataPath.listFiles(); //不要忘了要計算、減掉入徑的字元數


        String  tempStr = ""; //初始化
       
        for (int i=0; i < fileArray.length; i++) {//只收集檔案，不要資料夾，但每筆資料會產生入徑（但無法用 fileNamesArrayStr來做，因為它是字串，無法判定是否為檔案還是資料夾
        if (fileArray[i].isFile()) {
                               //用來接收每一筆的檔案名字串，但是會包含前面的入徑：/mnt/sdcard/
        String str = "";
        str = fileArray[i].toString();
                               // 用來去除多餘的入徑字串：/mnt/sdcard/
        String strSub = "";
                                 //利用substring 去掉每筆最前面的12個字元：/mnt/sdcard/
        strSub = str.substring(12, str.length()).toString();
                                // 以 "--"為記號，分隔每筆處理好的資料，存成一筆字串
        tempStr += "--" + strSub;
       
        }
        }

         //設一變數來處理最後的"--"兩個字元，讓它不會在ListView上多產生一個空的cell
          String result = "";
          Result = tempStr.substring(0, tempStr.length()-2);
        //以"--"為分節點將整筆字串切割成數個字串儲存成字串陣列，以顯示在螢幕上
        String[] strings = TextUtils.split(reselt, "--");
       
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, strings);
        lv = (ListView) findViewById(R.id.listView1);
        lv.setAdapter(adapter);
       
        } catch (Exception e) {
        e.printStackTrace();
        }
 

     
    }// end of onCreate
 
 
}

網路檔案下載─FTP

網路檔案下載─FTP: 從中華電信提供的網路存放空間，下載檔案。

使用外部元件： Apache Commons NET
   commons-net-3.0.1-src.zip 的class : 下載點

     1. Unzip it.

     2. 到Eclipse的android作業平台上的 File -> Import -> General -> File System

    

          

       3. 然後 Browse 剛才Unzip後 存放 commons-net-3.0.1-src 的夾子，找到 java 的子目錄，然後按『確定』。

4. 你的作業環境，應該會呈現下圖的樣子，如果如圖所示，表示成功，便可以開始使用了。

需開啟之權限： 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.INTERNET"/>


main.java


import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.http.util.EncodingUtils;
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.widget.TextView;

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

private TextView tv;
private TextView tvContent;
private String fileName = "myFile.txt"; //網站上準備要下載的檔名


private final String SD_PATH = Environment.getExternalStorageDirectory().getAbsolutePath();
private final String FILE_PATH = "/download";
private final String FILE_NAME = "copy_" + fileName; //下載進手機後的檔名
private final String ENCODING = "UTF-8";
private FileInputStream fis = null;


        private ProgressDialog mProgressDialog;
 
private Handler handler = new Handler(){  //使用handler, thread 防止下載檔案太大

@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
super.handleMessage(msg);
mProgressDialog.dismiss(); //close
readFile();
}

};

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
     
        tv = (TextView)findViewById(R.id.textview);
        tvContent = (TextView) findViewById(R.id.textviewContent);
        processThread();
     
    }
 
 
 
    private void ftpDownload() {  //使用FTP 下載檔案
    FTPClient ftpClient = new FTPClient();
    try {
//     ftpClient.connect(InetAddress.getByName("203.66.87.21"));//與以下的String 意義一樣
    ftpClient.connect(InetAddress.getByName("ftp.myweb.hinet.net")); //中華電信的網頁IP ADDRESS
    ftpClient.login("username", "password");
    tv.setText(String.valueOf(ftpClient.isConnected()));
    ftpClient.changeWorkingDirectory("/");
    File localfile = new File ("/sdcard/download/" + FILE_NAME);
    OutputStream os = new FileOutputStream(localfile);
    ftpClient.enterLocalPassiveMode();
    ftpClient.retrieveFile(fileName, os);
    ftpClient.logout();
    ftpClient.disconnect();
    }catch (Exception e) {
    e.printStackTrace();
    }
    }
 
 
    public void readFile () {  //將內容顯示到螢幕上
     
        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();
         tvContent.setText(result);
       
        } catch (Exception e) {
         e.printStackTrace();
        }
       }
 
 
    private void processThread() {
    mProgressDialog = ProgressDialog.show(this, "文件下載", "正在下載...");
    new Thread () {

@Override
public void run() {
// TODO Auto-generated method stub
//super.run();
ftpDownload();
prolongedActionMethod(); //做測試用的
handler.sendEmptyMessage(0);
}
   
    }.start();
    }
 
 
    private void prolongedActionMethod() { //故意延遲十秒鐘，做測試用的
    try {
    Thread.sleep(10000);
    }catch (Exception e){
    e.printStackTrace();
    }
    }
}


*************************************************
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:id="@+id/textview"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello"
        />
    <!--  將 TextView 包在 ScrollView 裡，當內容太長，可以捲動。  -->
     <ScrollView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:fadingEdge="vertical"
        android:paddingTop="10dip"
        android:scrollbars="vertical" >

        <TextView
            android:id="@+id/textviewContent"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:paddingTop="10dip"
            android:text=""
            android:textSize="20dp"
            android:textColor="#00FF00" />
    </ScrollView>

</LinearLayout>

IO： (3) 讀取SDCARD/fileio裡某個檔案的內容

IO


//讀取SDCARD/fileio裡檔案的內容


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:id="@+id/textView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:scrollbars="vertical"
        android:singleLine="false"
        android:maxLines="15"
        android:text="@string/hello"
        android:textSize="20dp"
        android:textColor="#00FF00" />

    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    </ListView>

</LinearLayout>

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

public class IO_FileContentActivity 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 = "test03.txt";
private final String ENCODING = "UTF-8";

FileInputStream fis = null;

TextView tv;
ListView lv;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
     
         tv = (TextView) findViewById(R.id.textView);
         tv.setMovementMethod(ScrollingMovementMethod.getInstance());//text 太長的話，讓TextView 滾動
     
        //列出Sdcard 裡的夾子和檔案，放上LISTVIEW
        try {
        File sdcardPATH = Environment.getExternalStorageDirectory();//找出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
       
//         File [] fileArray = sdcardPATH.listFiles(); //listFiles()則會加上完整入徑，列出入徑及資料夾＋檔名的集合，存在File格是的陣列

        File myDataPath = new File (sdcardPATH.getAbsolutePath() + "/fileio");
        File [] fileArray = myDataPath.listFiles();
       
       
        String  tempStr = ""; //初始化
       
        for (int i=0; i < fileArray.length; i++) {
        if (fileArray[i].isFile()) {   //只收集檔案，不要資料夾，但每筆資料會產生入徑（但無法用 fileNamesArrayStr來做，因為它是字串，無法判定是否為檔案還是資料夾
        String str = ""; //用來接收每一筆的檔案名字串，但是會包含前面的入徑：/mnt/sdcard/fileio
        str = fileArray[i].toString();
        String strSub = "";// 用來去除多餘的入徑字串：/mnt/sdcard/fileio
        strSub = str.substring(19, str.length()).toString(); //利用substring 去掉每筆最前面的19個字元：/mnt/sdcard/fileio
        tempStr += strSub + "--" ; // 以 "--"為記號，分隔每筆處理好的資料，存成一筆字串
       
        }
        }
        String result = ""; //設一變數來處理最後的"--"兩個字元，讓它不會在ListView上多產生一個空的cell
        result = tempStr.substring(0, tempStr.length()-2);
        final String[] strings = TextUtils.split(result, "--"); //以"--"為分節點將整筆字串切割成數個字串儲存成字串陣列，以顯示在螢幕上
       
        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(new OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
String filename = strings[position].toString();
Toast.makeText(Cq_IO_File01Activity.this, filename, Toast.LENGTH_SHORT).show();
readFile(filename);
}
});
       
       
        } catch (Exception e) {
        e.printStackTrace();
        }
 
     
     
     
        //readFile(); //讀出指定的檔到TEXTVIEW上
     
    }// end of onCreate
 
 
 
    public void readFile (String filename) {
   
    String result = "";
    try {
   
    File mFilePath = new File (SD_PATH + FILE_PATH);
    String mFileName = mFilePath + "/" + filename;
    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()
}