Android讀取SD卡下面所有的TXT文件名 listView顯示出來

Android讀取SD卡下面所有的TXT文件名，listView顯示出來。

1. package your.txtsdka;
3. import java.io.File;
4. import java.util.ArrayList;
5. import java.util.HashMap;
7. import android.app.Activity;
8. import android.os.Bundle;
9. import android.os.Environment;
10. import android.util.Log;
11. import android.widget.ListView;
12. import android.widget.SimpleAdapter;
14. public class Txt_sdkaActivity extends Activity {
15. private ListView lv;
16. ArrayList name;
18. /** Called when the activity is first created. */
19. @Override
20. public void onCreate(Bundle savedInstanceState) {
21. super.onCreate(savedInstanceState);
22. setContentView(R.layout.main);
23. lv = (ListView) findViewById(R.id.lv);
24. name = new ArrayList();
25. if (Environment.getExternalStorageState().equals(
26. Environment.MEDIA_MOUNTED)) {
27. File path = Environment.getExternalStorageDirectory();// 獲得SD卡路徑
28. // File path = new File("/mnt/sdcard/");
29. File[] files = path.listFiles();// 讀取
30. getFileName(files);
31. }
32. SimpleAdapter adapter = new SimpleAdapter(this, name, R.layout.sd_list,
33. new String[] { "Name" }, new int[] { R.id.txt_tv });
34. lv.setAdapter(adapter);
35. for (int i = 0; i < name.size(); i++) {
36. Log.i("zeng", "list. name: " + name.get(i));
37. }
38. }
40. private void getFileName(File[] files) {
41. if (files != null) {// 先判斷目錄是否為空，否則會報空指針
42. for (File file : files) {
43. if (file.isDirectory()) {
44. Log.i("zeng", "若是文件目錄。繼續讀1" + file.getName().toString()
45. + file.getPath().toString());
47. getFileName(file.listFiles());
48. Log.i("zeng", "若是文件目錄。繼續讀2" + file.getName().toString()
49. + file.getPath().toString());
50. } else {
51. String fileName = file.getName();
52. if (fileName.endsWith(".txt")) {
53. HashMap map = new HashMap();
54. String s = fileName.substring(0,
55. fileName.lastIndexOf(".")).toString();
56. Log.i("zeng", "文件名txt：： " + s);
57. map.put("Name", fileName.substring(0,
58. fileName.lastIndexOf(".")));
59. name.add(map);
60. }
61. }
62. }
63. }
64. }
65. }