Uzip文件夹递归-android

我试图解压缩压缩文件（此文件包含许多子文件夹和文件）。

I am not able to create sub-folders while unzipping the file. 

每次我收到错误说：

 No such file or directory. 

我搜索了很多关于这个的信息：

1. Android – 解压缩文件夹？
2. http://www.roseindia.net/tutorial/java/corejava/zip/ZipIsDirectory.html
3. 在Android应用程序中解压缩sd卡上的压缩文件
4. 如何在Java中递归解压缩文件？

但是，没有任何帮助我。

以下是我的尝试：

 public class UnZipper { private static final String TAG = "UnZip"; private String mFileName, mDestinationPath; public UnZipper(String fileName, String destinationPath) { mFileName = fileName; mDestinationPath = destinationPath; } public String getFileName() { return mFileName; } public String getDestinationPath() { return mDestinationPath; } // shrikant public void unzip() { String fullPath = mFileName; Log.d(TAG, "unzipping " + mFileName + " to " + mDestinationPath); doInBackground(fullPath, mDestinationPath); } // shrikant: I have changed return type from Boolean to boolean. protected boolean doInBackground(String filePath, String destinationPath) { File archive = new File(filePath); boolean returnValue = false; try { ZipFile zipfile = new ZipFile(archive); for (Enumeration e = zipfile.entries(); e.hasMoreElements();) { ZipEntry entry = (ZipEntry) e.nextElement(); try { unzipEntry(zipfile, entry, destinationPath); Log.d("Unzipped", entry.getName()); returnValue = true; } catch (Exception ex) { Log.e(TAG, "Error while extracting file: " + entry + ex.getMessage()); } } } catch (Exception e) { Log.e(TAG, "Error while extracting file " + archive, e); // return false; } return returnValue; } // shrikant: I have changed return type from void to boolean. /** * Unzips the zipped file into outputDir path. * * @param zipfile * @param entry * @param outputDir * @throws IOException */ private void unzipEntry(ZipFile zipfile, ZipEntry entry, String outputDir) throws IOException { Log.d("CURRENT ZIP", entry.getName()); String _dir = null, fileName = null; if (entry.getName().contains("\\")) { _dir = entry.getName().substring(0, entry.getName().indexOf('\\')); createDir(new File(outputDir, _dir)); fileName = entry.getName().substring(entry.getName().indexOf('\\')); } // Change by Prashant : To Remove "/" from file Name Date : 5/01/2011 if (fileName.toString().startsWith("\\")) { fileName = fileName.substring(1); // End } if (_dir != "") outputDir = outputDir + "/" + _dir; File outputFile = new File(outputDir, fileName); if (!outputFile.getParentFile().exists()) { createDir(outputFile.getParentFile()); } Log.d("OUTPUT FILE", outputDir + fileName); Log.v(TAG, "Extracting: " + entry); Log.d("FOUND inside unzipEntry()", entry.getName()); BufferedInputStream inputStream = new BufferedInputStream( zipfile.getInputStream(entry)); // **here I am getting error.** BufferedOutputStream outputStream = new BufferedOutputStream( new FileOutputStream(outputFile)); // **above line.** try { copy(inputStream, outputStream); } finally { outputStream.close(); inputStream.close(); } } private void createDir(File dir) { if (dir.exists()) { return; } Log.v(TAG, "Creating dir " + dir.getName()); if (!dir.mkdirs()) { throw new RuntimeException("Cannot create dir " + dir); } } private void copy(BufferedInputStream input, BufferedOutputStream output) throws IOException { byte[] buffer = new byte[4096]; int size; while ((size = input.read(buffer)) != -1) output.write(buffer, 0, size); } } 

我的问题是 :(请看代码）

当我调用unzipEntry()时，遇到子文件夹时，它会传递类似“ /data/abc.ext ”的内容，但我的文件系统不包含任何名为“ data ”的文件夹，我甚至尝试创建它，但没有这样做。

那么如何从压缩文件到目标路径创建子文件夹？

我甚至尝试过方法：

 if(entry.isDirectory) { // create directory } 

但是这不会被调用，因为unzipEntry() （请查看for() loop ）直接传递子文件夹下的文件。

请帮帮我。

谢谢。

Answer 1

哦好！ 我已经解决了.. 🙂

我编写了以下函数，如果需要，将递归创建子文件夹。

这是经过试验和测试的function，可以成功解压缩任何文件。

  /** * Unzips the file (recursively creates sub-folder if exists.) * * @param tempFileName * The zip file. * @param destinationPath * The destination path where unzipped file will be saved. */ public void unzipFile(String tempFileName, String destinationPath) { try { int index = destinationPath.lastIndexOf("\\"); String fileString = destinationPath.substring(index); File extFile = new File("/mnt/sdcard/courses1", fileString); if(!extFile.exists()) { createDir(extFile); } byte[] buffer = new byte[1024]; FileInputStream fin = new FileInputStream(tempFileName); ZipInputStream zin = new ZipInputStream(fin); ZipEntry zipentry = null; if (!(zin.available() == 0)) { byte[] startBuffer = new byte[8]; while ((zipentry = zin.getNextEntry()) != null) { String zipName = zipentry.getName(); if (zipName.startsWith("/")) { zipName = zipentry.getName(); } else if (zipName.startsWith("\\")) { zipName = zipentry.getName(); } else { zipName = "/" + zipentry.getName(); } String fileName = destinationPath + zipName; fileName = fileName.replace("\\", "/"); fileName = fileName.replace("//", "/"); if (zipentry.isDirectory()) { createDir(new File(fileName)); continue; } String name = zipentry.getName(); int start, end = 0; while (true) { start = name.indexOf('\\', end); end = name.indexOf('\\', start + 1); if (start > 0) "check".toString(); if (end > start && end > -1 && start > -1) { String dir = name.substring(1, end); createDir(new File(destinationPath + '/' + dir)); // name = name.substring(end); } else break; } File file = new File(fileName); FileOutputStream tempDexOut = new FileOutputStream(file); int BytesRead = 0; if (zipentry != null) { if (zin != null) { while ((BytesRead = zin.read(buffer)) != -1) { tempDexOut.write(buffer, 0, BytesRead); } tempDexOut.close(); } } } } } catch (Exception e) { Log.e("Exception", e.getMessage()); } } 

我希望它对某人有帮助。 🙂

谢谢。