Question

我已经有了这段代码...但是我想通过子文件夹搜索而不是仅仅通过sdcard.sorry搜索我的英文;）谢谢你的帮助，vinzenz

public class SongsManager {
// SDCard Path
final String MEDIA_PATH = new String("/sdcard/");
private ArrayList<HashMap<String, String>> songsList = new        ArrayList<HashMap<String, String>>();

// Constructor
public SongsManager(){
    **strong text**
 }

/**
 * Function to read all mp3 files from sdcard
 * and store the details in ArrayList
 * */
public ArrayList<HashMap<String, String>> getPlayList(){
    File home = new File(MEDIA_PATH);

    if (home.listFiles(new FileExtensionFilter()).length > 0) {
        for (File file : home.listFiles(new FileExtensionFilter())) {
            HashMap<String, String> song = new HashMap<String, String>();
            song.put("songTitle", file.getName().substring(0, (file.getName().length() - 4)));
            song.put("songPath", file.getPath());

            // Adding each song to SongList
            songsList.add(song);
        }
    }
    // return songs list array
    return songsList;
}

}

Answer 1

此代码可能对您有所帮助。它搜索SD卡中的歌曲（甚至在子文件夹中）＆amp;将详细信息存储在songsList中。

ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
    String[] STAR = { "*" };

    Cursor cursor;
    Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
    String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0";


    cursor = managedQuery(uri, STAR, selection, null, null);

    if (cursor != null) {
        if (cursor.moveToFirst()) {
            do {
                String songName = cursor
                        .getString(cursor
                                .getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME));


                String path = cursor.getString(cursor
                        .getColumnIndex(MediaStore.Audio.Media.DATA));


                String albumName = cursor.getString(cursor
                        .getColumnIndex(MediaStore.Audio.Media.ALBUM));
                int albumId = cursor
                        .getInt(cursor
                                .getColumnIndex(MediaStore.Audio.Media.ALBUM_ID));

                HashMap<String, String> song = new HashMap<String, String>();
                song.put("songTitle",albumName+" "+songName+"___"+albumId);
                song.put("songPath",path );
                songsList.add(song);

            } while (cursor.moveToNext());


        }

    }

Answer 2

考虑到从SD卡扫描媒体，您可以从MediaStore

获取此信息

 musiccursor = getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
            proj, MediaStore.Audio.Media.MIME_TYPE  + "= audio/mpeg", null, null);

int column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);


while(musiccursor.moveToNext()){

String path = musiccursor.get(column_index);
//path is your music path, use this
}

Answer 3

您的问题无法直接解决你必须编写一段代码来遍历目录中的每个文件，如果当前文件是一个目录，那么列出该目录的所有文件并再次迭代它的所有文件，依此类推。
类似于以下代码的内容将有助于此thread

import java.io.File;

public class DirectoryReader {

  static int spc_count=-1;

  static void process(File aFile) {
    spc_count++;

    if(aFile.isFile()) {
      // your logic to check songs file
    } else if (aFile.isDirectory()) {

      File[] listOfFiles = aFile.listFiles();
      if(listOfFiles!=null) {
        for (int i = 0; i < listOfFiles.length; i++) {
          process(listOfFiles[i]);
        }
      } else {
        // access is denied
      }
    }

    spc_count--;
  }

  public static void main(String[] args) {
    String nam = "/sdcard/";
    File aFile = new File(nam);
    process(aFile);
  }

}

如何在SDCard上找到所有音频文件（eclipse，android）

3 个答案: