讀取SDCard下的txt文件

package com.jx.udiskdemo;

import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import com.jx.udiskdemo.R;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ListView;
import android.widget.SimpleAdapter;
 

//該類用顯示加載SDK上的文件
public class FileActivity extends Activity {
   private  String  path;
     private ListView lv;
     ArrayList name; 
   
     /** Called when the activity is first created. */
     @Override 
     public void onCreate(Bundle savedInstanceState) { 
          super.onCreate(savedInstanceState); 
          setContentView(R.layout.file); 
         lv = (ListView) findViewById(R.id.list); 
         name = new ArrayList(); 
//       if (Environment.getExternalStorageState().equals(
//                  Environment.MEDIA_MOUNTED)) { 
            // File path = Environment.getExternalStorageDirectory();// 得到SD卡路徑 
             File path = new File("mnd/sta/樂航/");  
             File[] files = path.listFiles();// 讀取  
             getFileName(files); 
        // } 
         SimpleAdapter adapter = new SimpleAdapter(this, name, R.layout.file,
                   new String[] { "Name" }, new int[] { R.id.list });
         lv.setAdapter(adapter); 
        for (int i = 0; i < name.size(); i++) { 
              Log.i("zeng", "list.  name:  " + name.get(i)); 
          } 
     } 
  
     private void getFileName(File[] files) {
          if (files != null) {// 先判斷目錄是否爲空，不然會報空指針  
              for (File file : files) {
                    if (file.isDirectory()) {
                         Log.i("zeng", "如果文件目錄。繼續讀1" + file.getName().toString()
                                   + file.getPath().toString()); 
  
                     getFileName(file.listFiles()); 
                     Log.i("zeng", "如果文件目錄。繼續讀2" + file.getName().toString()
                               + file.getPath().toString()); 
                 } else { 
                      String fileName = file.getName(); 
                     if (fileName.endsWith(".txt")) {
                          HashMap map = new HashMap();
                          String s = fileName.substring(0,
                                    fileName.lastIndexOf(".")).toString();
                          Log.i("zeng", "文件名txt：：   " + s); 
                          map.put("Name", fileName.substring(0,
                                    fileName.lastIndexOf(".")));
                          name.add(map); 
                    } 
                 } 
             } 
         } 
     }  
}

 

 

大俠們  這是一個讀取SDCard上的txt文件，路徑換成U盤的爲何就不能夠，大俠們指點指點