主要就是采用流的方式處理大文件

1.先將源文件轉換成安卓系統自帶CheckedInputStream,這個是一個檢驗流：

CheckedInputStream cis = new CheckedInputStream(new FileInputStream(srcFile), new CRC32());

2.再將這個檢驗流轉換成Zip輸入流：

ZipInputStream zis = new ZipInputStream(cis);

3.獲取zip流的實體：

while ((zipEntry = zis.getNextEntry()) != null)

4.然后用字節輸出流的方式：

BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(destFile));int len;byte[] buff = new byte[DEFAULT_BUFF_SIZE];while ((len = zis.read(buff, 0 ,DEFAULT_BUFF_SIZE)) != -1) {bos.write(buff, 0, len);}

完整代碼：

public static File decompress(File srcFile, File destFile) throws Exception {while (destFile.exists()) {destFile = new File(destFile.getAbsolutePath()+"1");}CheckedInputStream cis = new CheckedInputStream(new FileInputStream(srcFile), new CRC32());ZipInputStream zis = new ZipInputStream(cis);doDecompress(destFile, zis);zis.close();return destFile;}private static void doDecompress(File destFile, ZipInputStream zis) throws Exception {ZipEntry zipEntry = null;while ((zipEntry = zis.getNextEntry()) != null) {String dir = destFile.getPath() + File.separator + zipEntry.getName();File dirFile = new File(dir);fileProber(dirFile);if (zipEntry.isDirectory()) {dirFile.mkdirs();} else {doDecompressFile(dirFile, zis);}zis.closeEntry();}}private static void doDecompressFile(File destFile, ZipInputStream zis) throws Exception {BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(destFile));int len;byte[] buff = new byte[DEFAULT_BUFF_SIZE];while ((len = zis.read(buff, 0 ,DEFAULT_BUFF_SIZE)) != -1) {bos.write(buff, 0, len);}bos.close();}

總結

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