在Android中解压缩文件 [英] Unzip file in Android

问题描述

我得到了以下错误，当我尝试解压缩zip文件

I got following error when i try to unzip zip file

结束的中央目录签字找不到

End-of-central-directory signature not found

我也曾经尝试7zip的lib中，它工作在简单的Java，但Android平台的罚款。结果
我得到一个依赖的jar未找到错误。

I have also try 7zip lib, it works fine in simple java but in android platform.
I get a "dependent jar not found" error.

try {
            // Initiate the ZipFile
            ZipFile zipFile = new ZipFile(file);
            String destinationPath = destPath;

            // If zip file is password protected then set the password
            if (zipFile.isEncrypted()) {
                zipFile.setPassword(password);
            }

            //Get a list of FileHeader. FileHeader is the header information for all the
            //files in the ZipFile
            List fileHeaderList = zipFile.getFileHeaders();

            // Loop through all the fileHeaders
            for (int i = 0; i < fileHeaderList.size(); i++) {
                FileHeader fileHeader = (FileHeader)fileHeaderList.get(i);
                if (fileHeader != null) {

                    //Build the output file
                    String outFilePath = destinationPath + System.getProperty("file.separator") + fileHeader.getFileName();
                    File outFile = new File(outFilePath);

                    //Checks if the file is a directory
                    if (fileHeader.isDirectory()) {
                        //This functionality is up to your requirements
                        //For now I create the directory
                        outFile.mkdirs();
                        continue;
                    }

                    //Check if the directories(including parent directories)
                    //in the output file path exists
                    File parentDir = outFile.getParentFile();
                    if (!parentDir.exists()) {
                        parentDir.mkdirs();
                    }

                    //Get the InputStream from the ZipFile
                    is = zipFile.getInputStream(fileHeader);
                    //Initialize the output stream
                    os = new FileOutputStream(outFile);

                    int readLen = -1;
                    byte[] buff = new byte[BUFF_SIZE];

                    //Loop until End of File and write the contents to the output stream
                    while ((readLen = is.read(buff)) != -1) {
                        os.write(buff, 0, readLen);
                    }

                    //Please have a look into this method for some important comments
                    closeFileHandlers(is, os);

                    //To restore File attributes (ex: last modified file time, 
                    //read only flag, etc) of the extracted file, a utility class
                    //can be used as shown below
                    UnzipUtil.applyFileAttributes(fileHeader, outFile);

                    System.out.println("Done extracting: " + fileHeader.getFileName());
                } else {
                    System.err.println("fileheader is null. Shouldn't be here");
                } 

//文件头总是给误差

//File header always give error

推荐答案

在Android的解压文件时，不需要第三方库。看看这个：

You don't need 3rd party libraries when unzipping files in Android. Have a look at this:

的http://www.jondev.net/articles/Unzipping_Files_with_Android_%28Programmatically%29

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