private static FileManager mInstance;private static Context mContext;public static ContentResolver mContentResolver;private static Object mLock = new Object();public static FileManager getInstance(Context context){  if (mInstance == null){   synchronized (mLock){    if (mInstance == null){     mInstance = new FileManager();     mContext = context;     mContentResolver = context.getContentResolver();    }   }  } return mInstance;}

/** * 獲取本機音樂列表 * @return */private static List<Music> getMusics() { ArrayList<Music> musics = new ArrayList<>(); Cursor c = null; try {  c = mContentResolver.query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, null, null,    MediaStore.Audio.Media.DEFAULT_SORT_ORDER);  while (c.moveToNext()) {   String path = c.getString(c.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));// 路徑   if (FileUtils.isExists(path)) {    continue;   }   String name = c.getString(c.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME)); // 歌曲名   String album = c.getString(c.getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM)); // 專輯   String artist = c.getString(c.getColumnIndexOrThrow(MediaStore.Audio.Media.ARTIST)); // 作者   long size = c.getLong(c.getColumnIndexOrThrow(MediaStore.Audio.Media.SIZE));// 大小   int duration = c.getInt(c.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION));// 時長   int time = c.getInt(c.getColumnIndexOrThrow(MediaStore.Audio.Media._ID));// 歌曲的id   // int albumId = c.getInt(c.getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM_ID));   Music music = new Music(name, path, album, artist, size, duration);   musics.add(music);  } } catch (Exception e) {  e.printStackTrace(); } finally {  if (c != null) {   c.close();  } } return musics;}

/** * 判斷文件是否存在 * @param path 文件的路徑 * @return */public static boolean isExists(String path) { File file = new File(path); return file.exists();}

public class Music implements Comparable<Music> { /**歌曲名*/ private String name; /**路徑*/ private String path; /**所屬專輯*/ private String album; /**藝術家(作者)*/ private String artist; /**文件大小*/ private long size; /**時長*/ private int duration; /**歌曲名的拼音，用于字母排序*/ private String pinyin; public Music(String name, String path, String album, String artist, long size, int duration) {  this.name = name;  this.path = path;  this.album = album;  this.artist = artist;  this.size = size;  this.duration = duration;  pinyin = PinyinUtils.getPinyin(name); } ... //此處省略setter和getter方法}

public static String getPinyin(String str) { // 設置拼音結果的格式 HanyuPinyinOutputFormat format = new HanyuPinyinOutputFormat(); format.setCaseType(HanyuPinyinCaseType.UPPERCASE);// 設置為大寫形式 format.setToneType(HanyuPinyinToneType.WITHOUT_TONE);// 不用加入聲調 StringBuilder sb = new StringBuilder(); char[] charArray = str.toCharArray(); for (int i = 0; i < charArray.length; i++) {  char c = charArray[i];  if (Character.isWhitespace(c)) {// 如果是空格則跳過   continue;  }  if (isHanZi(c)) {// 如果是漢字   String s = "";   try {    // toHanyuPinyinStringArray 返回一個字符串數組是因為該漢字可能是多音字，此處只取第一個結果    s = PinyinHelper.toHanyuPinyinStringArray(c, format)[0];    sb.append(s);   } catch (BadHanyuPinyinOutputFormatCombination e) {    e.printStackTrace();    sb.append(s);   }  } else {   // 不是漢字   if (i == 0) {    if (isEnglish(c)) {// 第一個屬于字母，則返回該字母     return String.valueOf(c).toUpperCase(Locale.ENGLISH);    }    return "#"; // 不是的話返回#號   }  } } return sb.toString();}

/** * 獲取本機視頻列表 * @return */private static List<Video> getVideos() { List<Video> videos = new ArrayList<Video>(); Cursor c = null; try {  // String[] mediaColumns = { "_id", "_data", "_display_name",  // "_size", "date_modified", "duration", "resolution" };  c = mContentResolver.query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, null, null, null, MediaStore.Video.Media.DEFAULT_SORT_ORDER);  while (c.moveToNext()) {   String path = c.getString(c.getColumnIndexOrThrow(MediaStore.Video.Media.DATA));// 路徑   if (!FileUtils.isExists(path)) {    continue;   }   int id = c.getInt(c.getColumnIndexOrThrow(MediaStore.Video.Media._ID));// 視頻的id   String name = c.getString(c.getColumnIndexOrThrow(MediaStore.Video.Media.DISPLAY_NAME)); // 視頻名稱   String resolution = c.getString(c.getColumnIndexOrThrow(MediaStore.Video.Media.RESOLUTION)); //分辨率   long size = c.getLong(c.getColumnIndexOrThrow(MediaStore.Video.Media.SIZE));// 大小   long duration = c.getLong(c.getColumnIndexOrThrow(MediaStore.Video.Media.DURATION));// 時長   long date = c.getLong(c.getColumnIndexOrThrow(MediaStore.Video.Media.DATE_MODIFIED));//修改時間   Video video = new Video(id, path, name, resolution, size, date, duration);   videos.add(video);  } } catch (Exception e) {  e.printStackTrace(); } finally {  if (c != null) {   c.close();  } } return videos;}

public class Video { private int id = 0; private String path = null; private String name = null; private String resolution = null;// 分辨率 private long size = 0; private long date = 0; private long duration = 0; public Video(int id, String path, String name, String resolution, long size, long date, long duration) {  this.id = id;  this.path = path;  this.name = name;  this.resolution = resolution;  this.size = size;  this.date = date;  this.duration = duration; } ... //此處省略setter和getter方法｝

// 獲取視頻縮略圖private static Bitmap getVideoThumbnail(int id) { Bitmap bitmap = null; BitmapFactory.Options options = new BitmapFactory.Options(); options.inDither = false; options.inPreferredConfig = Bitmap.Config.ARGB_8888; bitmap = MediaStore.Video.Thumbnails.getThumbnail(mContentResolver, id, MediaStore.Images.Thumbnails.MICRO_KIND, options); return bitmap;}

/** * 得到圖片文件夾集合 */private static List<ImgFolderBean> getImageFolders() { List<ImgFolderBean> folders = new ArrayList<ImgFolderBean>(); // 掃描圖片 Cursor c = null; try {  c = mContentResolver.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null,    MediaStore.Images.Media.MIME_TYPE + "= ? or " + MediaStore.Images.Media.MIME_TYPE + "= ?",    new String[]{"image/jpeg", "image/png"}, MediaStore.Images.Media.DATE_MODIFIED);  List<String> mDirs = new ArrayList<String>();//用于保存已經添加過的文件夾目錄  while (c.moveToNext()) {   String path = c.getString(c.getColumnIndex(MediaStore.Images.Media.DATA));// 路徑   File parentFile = new File(path).getParentFile();   if (parentFile == null)    continue;   String dir = parentFile.getAbsolutePath();   if (mDirs.contains(dir))//如果已經添加過    continue;   mDirs.add(dir);//添加到保存目錄的集合中   ImgFolderBean folderBean = new ImgFolderBean();   folderBean.setDir(dir);   folderBean.setFistImgPath(path);   if (parentFile.list() == null)    continue;   int count = parentFile.list(new FilenameFilter() {    @Override    public boolean accept(File dir, String filename) {     if (filename.endsWith(".jpeg") || filename.endsWith(".jpg") || filename.endsWith(".png")) {      return true;     }     return false;    }   }).length;   folderBean.setCount(count);   folders.add(folderBean);  } } catch (Exception e) {  e.printStackTrace(); } finally {  if (c != null) {   c.close();  } } return folders;}

public class ImgFolderBean { /**當前文件夾的路徑*/ private String dir; /**第一張圖片的路徑，用于做文件夾的封面圖片*/ private String fistImgPath; /**文件夾名*/ private String name; /**文件夾中圖片的數量*/ private int count; public ImgFolderBean(String dir, String fistImgPath, String name, int count) {  this.dir = dir;  this.fistImgPath = fistImgPath;  this.name = name;  this.count = count; } ... //此處省略setter和getter方法}

/** * 通過圖片文件夾的路徑獲取該目錄下的圖片 */private static List<String> getImgListByDir(String dir) { ArrayList<String> imgPaths = new ArrayList<>(); File directory = new File(dir); if (directory == null || !directory.exists()) {  return imgPaths; } File[] files = directory.listFiles(); for (File file : files) {  String path = file.getAbsolutePath();  if (FileUtils.isPicFile(path)) {   imgPaths.add(path);  } } return imgPaths;}

/** * 獲取已安裝apk的列表 */private static List<AppInfo> getAppInfos() { ArrayList<AppInfo> appInfos = new ArrayList<AppInfo>(); //獲取到包的管理者 PackageManager packageManager = mContext.getPackageManager(); //獲得所有的安裝包 List<PackageInfo> installedPackages = packageManager.getInstalledPackages(0); //遍歷每個安裝包，獲取對應的信息 for (PackageInfo packageInfo : installedPackages) {  AppInfo appInfo = new AppInfo();  appInfo.setApplicationInfo(packageInfo.applicationInfo);  appInfo.setVersionCode(packageInfo.versionCode);  //得到icon  Drawable drawable = packageInfo.applicationInfo.loadIcon(packageManager);  appInfo.setIcon(drawable);  //得到程序的名字  String apkName = packageInfo.applicationInfo.loadLabel(packageManager).toString();  appInfo.setApkName(apkName);  //得到程序的包名  String packageName = packageInfo.packageName;  appInfo.setApkPackageName(packageName);  //得到程序的資源文件夾  String sourceDir = packageInfo.applicationInfo.sourceDir;  File file = new File(sourceDir);  //得到apk的大小  long size = file.length();  appInfo.setApkSize(size);  System.out.println("---------------------------");  System.out.println("程序的名字:" + apkName);  System.out.println("程序的包名:" + packageName);  System.out.println("程序的大小:" + size);  //獲取到安裝應用程序的標記  int flags = packageInfo.applicationInfo.flags;  if ((flags & ApplicationInfo.FLAG_SYSTEM) != 0) {   //表示系統app   appInfo.setIsUserApp(false);  } else {   //表示用戶app   appInfo.setIsUserApp(true);  }  if ((flags & ApplicationInfo.FLAG_EXTERNAL_STORAGE) != 0) {   //表示在sd卡   appInfo.setIsRom(false);  } else {   //表示內存   appInfo.setIsRom(true);  }  appInfos.add(appInfo); } return appInfos;}

public class AppInfo { private ApplicationInfo applicationInfo; private int versionCode = 0; /**  * 圖片的icon  */ private Drawable icon; /**  * 程序的名字  */ private String apkName; /**  * 程序大小  */ private long apkSize; /**  * 表示到底是用戶app還是系統app  * 如果表示為true 就是用戶app  * 如果是false表示系統app  */ private boolean isUserApp; /**  * 放置的位置  */ private boolean isRom; /**  * 包名  */ private String apkPackageName; ... //此處省略setter和getter方法｝

/** * 通過文件類型得到相應文件的集合 **/private static List<FileBean> getFilesByType(int fileType) { List<FileBean> files = new ArrayList<FileBean>(); // 掃描files文件庫 Cursor c = null; try {  c = mContentResolver.query(MediaStore.Files.getContentUri("external"), new String[]{"_id", "_data", "_size"}, null, null, null);  int dataindex = c.getColumnIndex(MediaStore.Files.FileColumns.DATA);  int sizeindex = c.getColumnIndex(MediaStore.Files.FileColumns.SIZE);  while (c.moveToNext()) {   String path = c.getString(dataindex);   if (FileUtils.getFileType(path) == fileType) {    if (!FileUtils.isExists(path)) {     continue;    }    long size = c.getLong(sizeindex);    FileBean fileBean = new FileBean(path, FileUtils.getFileIconByPath(path));    files.add(fileBean);   }  } } catch (Exception e) {  e.printStackTrace(); } finally {  if (c != null) {   c.close();  } } return files;}

/**文檔類型*/public static final int TYPE_DOC = 0;/**apk類型*/public static final int TYPE_APK = 1;/**壓縮包類型*/public static final int TYPE_ZIP = 2;

 public static int getFileType(String path) { path = path.toLowerCase(); if (path.endsWith(".doc") || path.endsWith(".docx") || path.endsWith(".xls") || path.endsWith(".xlsx")   || path.endsWith(".ppt") || path.endsWith(".pptx")) {  return TYPE_DOC; }else if (path.endsWith(".apk")) {  return TYPE_APK; }else if (path.endsWith(".zip") || path.endsWith(".rar") || path.endsWith(".tar") || path.endsWith(".gz")) {  return TYPE_ZIP; }else{  return -1; }}

public class FileBean { /** 文件的路徑*/ public String path; /**文件圖片資源的id，drawable或mipmap文件中已經存放doc、xml、xls等文件的圖片*/ public int iconId; public FileBean(String path, int iconId) {  this.path = path;  this.iconId = iconId; }}

/**通過文件名獲取文件圖標*/public static int getFileIconByPath(String path){ path = path.toLowerCase(); int iconId = R.mipmap.unknow_file_icon; if (path.endsWith(".txt")){  iconId = R.mipmap.type_txt; }else if(path.endsWith(".doc") || path.endsWith(".docx")){  iconId = R.mipmap.type_doc; }else if(path.endsWith(".xls") || path.endsWith(".xlsx")){  iconId = R.mipmap.type_xls; }else if(path.endsWith(".ppt") || path.endsWith(".pptx")){  iconId = R.mipmap.type_ppt; }else if(path.endsWith(".xml")){  iconId = R.mipmap.type_xml; }else if(path.endsWith(".htm") || path.endsWith(".html")){  iconId = R.mipmap.type_html; } return iconId;}