Android下gzip数据流解压缩

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 	public static byte[] gzipCompress(final byte[] data) {

        if (0 == data.length){
            return KEmptyByteArray;
        }


        byte[] pBuf = KEmptyByteArray;


        try {
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            GZIPOutputStream gzip = new GZIPOutputStream(byteArrayOutputStream);
            gzip.write(data);
            gzip.close();
            pBuf = byteArrayOutputStream.toByteArray();
            byteArrayOutputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return pBuf;
    }
    

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    public static byte[] gzipUncompress(final byte[] data) {

        byte[] pBuf = KEmptyByteArray;
        if (data.length > 0) {
             ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(data);
            final ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            GZIPInputStream gzipInputStream = null;
            try {

                gzipInputStream = new GZIPInputStream(byteArrayInputStream);

                int byteCount = 0;

                while (byteCount >= 0) {
                    byteCount = gzipInputStream.read(KGZipUncompressBuffer);
                    if(byteCount>0){
                        byteArrayOutputStream.write(KGZipUncompressBuffer, 0, byteCount);
                    }

                }

                pBuf = byteArrayOutputStream.toByteArray();

            }catch(IOException e){
                Log.w("gzip uncompressed fail", e.getMessage());
            }
            finally {

                try {
                    if (null !=byteArrayInputStream){
                        byteArrayInputStream.close();
                    }

                    if (null != byteArrayOutputStream){
                        byteArrayOutputStream.close();
                    }

                    if (null != gzipInputStream){
                        gzipInputStream.close();
                    }
                }
                catch (IOException e){
                    Log.w("gzip", e.getMessage());
                }
            }
        }

        return pBuf;
    }
    

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    //判断一个数据流是否是GZip
    public static boolean isGZipData(final byte[] data){

        if (data.length > 2
                && data[0] == KYKGZipHeaderFirstByte
                && data[1] == KYKGZipHeaderSecondByte){
            return true;
        }

        return false;
    }