Android读取SD卡下面所有的TXT文件名 listView显示出来

来源：http://www.linuxidc.com/Linux/2011-12/49966.htm

package your.txtsdka;  

import java.io.File;  
import java.util.ArrayList;  
import java.util.HashMap;  

import android.app.Activity;  
import android.os.Bundle;  
import android.os.Environment;  
import android.util.Log;  
import android.widget.ListView;  
import android.widget.SimpleAdapter;  

public class Txt_sdkaActivity extends Activity {  
private ListView lv;  
    ArrayList name;  

/** Called when the activity is first created. */  
@Override  
public void onCreate(Bundle savedInstanceState) {  
super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
        lv = (ListView) findViewById(R.id.lv);  
        name = new ArrayList();  
if (Environment.getExternalStorageState().equals(  
                Environment.MEDIA_MOUNTED)) {  
            File path = Environment.getExternalStorageDirectory();// 获得SD卡路径 
// File path = new File("/mnt/sdcard/"); 
            File[] files = path.listFiles();// 读取 
            getFileName(files);  
        }  
        SimpleAdapter adapter = new SimpleAdapter(this, name, R.layout.sd_list,  
new String[] { "Name" }, new int[] { R.id.txt_tv });  
        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) {// 先判断目录是否为空，否则会报空指针 
for (File file : files) {  
if (file.isDirectory()) {  
                    Log.i("zeng", "若是文件目录。继续读1" + file.getName().toString()  
                            + file.getPath().toString());  

                    getFileName(file.listFiles());  
                    Log.i("zeng", "若是文件目录。继续读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);  
                    }  
                }  
            }  
        }  
    }  
}