Android--文件夹管理器
来源：互联网 发布：microsoft相机软件 编辑：程序博客网 时间：2024/05/16 05:16
直接上代码：
import android.content.Context;import android.content.CursorLoader;import android.database.Cursor;import android.media.MediaMetadataRetriever;import android.net.Uri;import android.os.Environment;import android.provider.MediaStore;import android.text.format.DateFormat;import android.text.format.Formatter;import android.webkit.MimeTypeMap;import com.calintat.explorer.R;import java.io.BufferedInputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.nio.channels.FileChannel;import java.util.ArrayList;import java.util.Date;import java.util.Locale;import java.util.zip.ZipEntry;import java.util.zip.ZipInputStream;public class FileUtils { public static File copyFile(File src, File path) throws Exception { try { if (src.isDirectory()) { if (src.getPath().equals(path.getPath())) throw new Exception(); File directory = createDirectory(path, src.getName()); for (File file : src.listFiles()) copyFile(file, directory); return directory; } else { File file = new File(path, src.getName()); FileChannel channel = new FileInputStream(src).getChannel(); channel.transferTo(0, channel.size(), new FileOutputStream(file).getChannel()); return file; } } catch (Exception e) { throw new Exception(String.format("Error copying %s", src.getName())); } } //---------------------------------------------------------------------------------------------- public static File createDirectory(File path, String name) throws Exception { File directory = new File(path, name); if (directory.mkdirs()) return directory; if (directory.exists()) throw new Exception(String.format("%s already exists", name)); throw new Exception(String.format("Error creating %s", name)); } public static File deleteFile(File file) throws Exception { if (file.isDirectory()) { for (File child : file.listFiles()) { deleteFile(child); } } if (file.delete()) return file; throw new Exception(String.format("Error deleting %s", file.getName())); } public static File renameFile(File file, String name) throws Exception { String extension = getExtension(file.getName()); if (!extension.isEmpty()) name += "." + extension; File newFile = new File(file.getParent(), name); if (file.renameTo(newFile)) return newFile; throw new Exception(String.format("Error renaming %s", file.getName())); } public static File unzip(File zip) throws Exception { File directory = createDirectory(zip.getParentFile(), removeExtension(zip.getName())); FileInputStream fileInputStream = new FileInputStream(zip); BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream); try (ZipInputStream zipInputStream = new ZipInputStream(bufferedInputStream)) { ZipEntry zipEntry; while ((zipEntry = zipInputStream.getNextEntry()) != null) { byte[] buffer = new byte[1024]; File file = new File(directory, zipEntry.getName()); if (zipEntry.isDirectory()) { if (!file.mkdirs()) throw new Exception("Error uncompressing"); } else { int count; try (FileOutputStream fileOutputStream = new FileOutputStream(file)) { while ((count = zipInputStream.read(buffer)) != -1) { fileOutputStream.write(buffer, 0, count); } } } } } return directory; } public static File getInternalStorage() { //returns the path to the internal storage return Environment.getExternalStorageDirectory(); } //---------------------------------------------------------------------------------------------- public static File getExternalStorage() { //returns the path to the external storage or null if it doesn't exist String path = System.getenv("SECONDARY_STORAGE"); return path != null ? new File(path) : null; } public static File getPublicDirectory(String type) { //returns the path to the public directory of the given type return Environment.getExternalStoragePublicDirectory(type); } public static String getAlbum(File file) { try { MediaMetadataRetriever retriever = new MediaMetadataRetriever(); retriever.setDataSource(file.getPath()); return retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ALBUM); } catch (Exception e) { return null; } } //---------------------------------------------------------------------------------------------- public static String getArtist(File file) { try { MediaMetadataRetriever retriever = new MediaMetadataRetriever(); retriever.setDataSource(file.getPath()); return retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST); } catch (Exception e) { return null; } } public static String getDuration(File file) { try { MediaMetadataRetriever retriever = new MediaMetadataRetriever(); retriever.setDataSource(file.getPath()); String duration = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION); long milliseconds = Long.parseLong(duration); long s = milliseconds / 1000 % 60; long m = milliseconds / 1000 / 60 % 60; long h = milliseconds / 1000 / 60 / 60 % 24; if (h == 0) return String.format(Locale.getDefault(), "%02d:%02d", m, s); return String.format(Locale.getDefault(), "%02d:%02d:%02d", h, m, s); } catch (Exception e) { return null; } } public static String getLastModified(File file) { //returns the last modified date of the given file as a formatted string return DateFormat.format("dd MMM yyy", new Date(file.lastModified())).toString(); } public static String getMimeType(File file) { //returns the mime type for the given file or null iff there is none return MimeTypeMap.getSingleton().getMimeTypeFromExtension(getExtension(file.getName())); } public static String getName(File file) { //returns the name of the file hiding extensions of known file types switch (FileType.getFileType(file)) { case DIRECTORY: return file.getName(); case MISC_FILE: return file.getName(); default: return removeExtension(file.getName()); } } public static String getPath(File file) { //returns the path of the given file or null if the file is null return file != null ? file.getPath() : null; } public static String getSize(Context context, File file) { if (file.isDirectory()) { File[] children = getChildren(file); if (children == null) return null; return String.format("%s items", children.length); } else { return Formatter.formatShortFileSize(context, file.length()); } } public static String getStorageUsage(Context context) { File internal = getInternalStorage(); File external = getExternalStorage(); long f = internal.getFreeSpace(); long t = internal.getTotalSpace(); if (external != null) { f += external.getFreeSpace(); t += external.getTotalSpace(); } String use = Formatter.formatShortFileSize(context, t - f); String tot = Formatter.formatShortFileSize(context, t); return String.format("%s used of %s", use, tot); } public static String getTitle(File file) { try { MediaMetadataRetriever retriever = new MediaMetadataRetriever(); retriever.setDataSource(file.getPath()); return retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_TITLE); } catch (Exception e) { return null; } } private static String getExtension(String filename) { //returns the file extension or an empty string iff there is no extension return filename.contains(".") ? filename.substring(filename.lastIndexOf(".") + 1) : ""; } //---------------------------------------------------------------------------------------------- public static String removeExtension(String filename) { int index = filename.lastIndexOf("."); return index != -1 ? filename.substring(0, index) : filename; } public static int compareDate(File file1, File file2) { long lastModified1 = file1.lastModified(); long lastModified2 = file2.lastModified(); return Long.compare(lastModified2, lastModified1); } //---------------------------------------------------------------------------------------------- public static int compareName(File file1, File file2) { String name1 = file1.getName(); String name2 = file2.getName(); return name1.compareToIgnoreCase(name2); } public static int compareSize(File file1, File file2) { long length1 = file1.length(); long length2 = file2.length(); return Long.compare(length2, length1); } public static int getColorResource(File file) { switch (FileType.getFileType(file)) { case DIRECTORY: return R.color.directory; case MISC_FILE: return R.color.misc_file; case AUDIO: return R.color.audio; case IMAGE: return R.color.image; case VIDEO: return R.color.video; case DOC: return R.color.doc; case PPT: return R.color.ppt; case XLS: return R.color.xls; case PDF: return R.color.pdf; case TXT: return R.color.txt; case ZIP: return R.color.zip; default: return 0; } } //---------------------------------------------------------------------------------------------- public static int getImageResource(File file) { switch (FileType.getFileType(file)) { case DIRECTORY: return R.drawable.ic_directory; case MISC_FILE: return R.drawable.ic_misc_file; case AUDIO: return R.drawable.ic_audio; case IMAGE: return R.drawable.ic_image; case VIDEO: return R.drawable.ic_video; case DOC: return R.drawable.ic_doc; case PPT: return R.drawable.ic_ppt; case XLS: return R.drawable.ic_xls; case PDF: return R.drawable.ic_pdf; case TXT: return R.drawable.ic_txt; case ZIP: return R.drawable.ic_zip; default: return 0; } } public static boolean isStorage(File dir) { return dir == null || dir.equals(getInternalStorage()) || dir.equals(getExternalStorage()); } //---------------------------------------------------------------------------------------------- public static File[] getChildren(File directory) { if (!directory.canRead()) return null; return directory.listFiles(pathname -> pathname.exists() && !pathname.isHidden()); } //---------------------------------------------------------------------------------------------- public static ArrayList<File> getAudioLibrary(Context context) { ArrayList<File> list = new ArrayList<>(); Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; String data[] = new String[]{MediaStore.Audio.Media.DATA}; String selection = MediaStore.Audio.Media.IS_MUSIC; Cursor cursor = new CursorLoader(context, uri, data, selection, null, null).loadInBackground(); if (cursor != null) { while (cursor.moveToNext()) { File file = new File(cursor.getString(cursor.getColumnIndex(data[0]))); if (file.exists()) list.add(file); } cursor.close(); } return list; } //---------------------------------------------------------------------------------------------- public static ArrayList<File> getImageLibrary(Context context) { ArrayList<File> list = new ArrayList<>(); Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI; String data[] = new String[]{MediaStore.Images.Media.DATA}; Cursor cursor = new CursorLoader(context, uri, data, null, null, null).loadInBackground(); if (cursor != null) { while (cursor.moveToNext()) { File file = new File(cursor.getString(cursor.getColumnIndex(data[0]))); if (file.exists()) list.add(file); } cursor.close(); } return list; } public static ArrayList<File> getVideoLibrary(Context context) { ArrayList<File> list = new ArrayList<>(); Uri uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI; String data[] = new String[]{MediaStore.Video.Media.DATA}; Cursor cursor = new CursorLoader(context, uri, data, null, null, null).loadInBackground(); if (cursor != null) { while (cursor.moveToNext()) { File file = new File(cursor.getString(cursor.getColumnIndex(data[0]))); if (file.exists()) list.add(file); } cursor.close(); } return list; } public static ArrayList<File> searchFilesName(Context context, String name) { ArrayList<File> list = new ArrayList<>(); Uri uri = MediaStore.Files.getContentUri("external"); String data[] = new String[]{MediaStore.Files.FileColumns.DATA}; Cursor cursor = new CursorLoader(context, uri, data, null, null, null).loadInBackground(); if (cursor != null) { while (cursor.moveToNext()) { File file = new File(cursor.getString(cursor.getColumnIndex(data[0]))); if (file.exists() && file.getName().startsWith(name)) list.add(file); } cursor.close(); } return list; } public enum FileType { DIRECTORY, MISC_FILE, AUDIO, IMAGE, VIDEO, DOC, PPT, XLS, PDF, TXT, ZIP; public static FileType getFileType(File file) { if (file.isDirectory()) return FileType.DIRECTORY; String mime = FileUtils.getMimeType(file); if (mime == null) return FileType.MISC_FILE; if (mime.startsWith("audio")) return FileType.AUDIO; if (mime.startsWith("image")) return FileType.IMAGE; if (mime.startsWith("video")) return FileType.VIDEO; if (mime.startsWith("application/ogg")) return FileType.AUDIO; if (mime.startsWith("application/msword")) return FileType.DOC; if (mime.startsWith("application/vnd.ms-word")) return FileType.DOC; if (mime.startsWith("application/vnd.ms-powerpoint")) return FileType.PPT; if (mime.startsWith("application/vnd.ms-excel")) return FileType.XLS; if (mime.startsWith("application/vnd.openxmlformats-officedocument.wordprocessingml")) return FileType.DOC; if (mime.startsWith("application/vnd.openxmlformats-officedocument.presentationml")) return FileType.PPT; if (mime.startsWith("application/vnd.openxmlformats-officedocument.spreadsheetml")) return FileType.XLS; if (mime.startsWith("application/pdf")) return FileType.PDF; if (mime.startsWith("text")) return FileType.TXT; if (mime.startsWith("application/zip")) return FileType.ZIP; return FileType.MISC_FILE; } }}阅读全文
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