基于Android下载并解压Zip文件，更新UI简单帮助类
来源：互联网 发布：小米6怎么样知乎 编辑：程序博客网 时间：2024/04/19 09:13
类似于：http://blog.csdn.net/jarlen/article/details/44794031
下载文件：
/** * 下载文件 * * @param down_url * @param output * @param tmpDir */ private void download(String down_url, File output, File tmpDir) { InputStream inputStream = null; OutputStream outputStream = null; File tmp = null; int down_step = 1;// 提示step int totalSize = 0; int downloadCount = 0;// 已经下载好的大小 int updateCount = 0;// 已经上传的文件大小 try { tmp = File.createTempFile("download", ".tmp", tmpDir); URL url = new URL(down_url); HttpURLConnection httpURLConnection = (HttpURLConnection) url .openConnection(); httpURLConnection.setConnectTimeout(30 * 1000); httpURLConnection.setReadTimeout(30 * 1000); // 获取下载文件的size totalSize = httpURLConnection.getContentLength(); inputStream = new URL(down_url).openStream(); outputStream = new BufferedOutputStream(new FileOutputStream(tmp)); byte[] buffer = new byte[BUFFER_SIZE]; int readsize = 0; while ((readsize = inputStream.read(buffer)) != -1) { outputStream.write(buffer, 0, readsize); downloadCount += readsize;// 时时获取下载到的大小 // 每次增长1% if (updateCount == 0 || (downloadCount * 100 / totalSize - down_step) >= updateCount) { updateCount += down_step; sendMessage(DOWN_UPDATA, updateCount); } } if (httpURLConnection != null) { httpURLConnection.disconnect(); } tmp.renameTo(output); tmp = null; } catch (IOException e) { sendMessage(DOWN_ERROR, 0); throw new RuntimeException(e); } finally { try { if (tmp != null) { tmp.delete(); tmp = null; } if (inputStream != null) { inputStream.close(); inputStream = null; } if (outputStream != null) { outputStream.close(); outputStream = null; } } catch (Exception e2) { sendMessage(DOWN_ERROR, 0); } sendMessage(DOWN_FINISH, 0); } }解压Zip文件
public class ZipUnPack { private static final int BUFFER_SIZE = 8192; private String _zipFile; private String _location; private byte[] _buffer; /** * Constructor. * * @param zipFile * Fully-qualified path to .zip file * @param location * Fully-qualified path to folder where files should be written. * Path must have a trailing slash. */ public ZipUnPack(String zipFile, String location) { _zipFile = zipFile; _location = location; _buffer = new byte[BUFFER_SIZE]; dirChecker(""); } public Boolean unzip() { FileInputStream fin = null; ZipInputStream zin = null; OutputStream fout = null; File outputDir = new File(_location); File tmp = null; Boolean isSucess = true; try { fin = new FileInputStream(_zipFile); zin = new ZipInputStream(fin); ZipEntry ze = null; while ((ze = zin.getNextEntry()) != null) { Log.d("Decompress", "Unzipping " + ze.getName()); if (ze.isDirectory()) { dirChecker(ze.getName()); } else { tmp = File.createTempFile("decomp", ".tmp", outputDir); fout = new BufferedOutputStream(new FileOutputStream(tmp)); copyStream(zin, fout, _buffer, BUFFER_SIZE); zin.closeEntry(); fout.close(); fout = null; tmp.renameTo(new File(_location + ze.getName())); tmp = null; } } zin.close(); zin = null; } catch (IOException e) { isSucess = false; throw new RuntimeException(e); } finally { if (tmp != null) { try { tmp.delete(); } catch (Exception ignore) { } } if (fout != null) { try { fout.close(); } catch (Exception ignore) { ; } } if (zin != null) { try { zin.closeEntry(); } catch (Exception ignore) { ; } } if (fin != null) { try { fin.close(); } catch (Exception ignore) { ; } } isSucess = true; } return isSucess; } private void dirChecker(String dir) { File f = new File(_location + dir); if (!f.isDirectory()) { f.mkdirs(); } } /** * Copy from one stream to another. Throws IOException in the event of error * (for example, SD card is full) * * @param is * Input stream. * @param os * Output stream. * @param buffer * Temporary buffer to use for copy. * @param bufferSize * Size of temporary buffer, in bytes. */ private void copyStream(InputStream is, OutputStream os, byte[] buffer, int bufferSize) throws IOException { try { for (;;) { int count = is.read(buffer, 0, bufferSize); if (count == -1) { break; } os.write(buffer, 0, count); } } catch (IOException e) { throw e; } }}整个帮助类：
public class ZipDownLoadHelper{ private static final int BUFFER_SIZE = 1024; private static final int DOWN_BEGIN = 0; private static final int DOWN_UPDATA = 1; private static final int DOWN_FINISH = 2; private static final int DOWN_ERROR = 3; private static final int UNPACK_BEGIN = 4; private static final int UNPACK_END = 5; private static final int UNPACK_ERROR = 6; private Context mContext; private Thread mDownLoadThread; private OnZipDownLoadAndUnpackListener mOnZipDownLoadAndUnpackListener; private Handler handler = new Handler() { public void handleMessage(Message msg) { if (!Thread.currentThread().isInterrupted()) { switch (msg.what) { case DOWN_BEGIN : if (mOnZipDownLoadAndUnpackListener != null) { mOnZipDownLoadAndUnpackListener.onDownLoadStart(); } break; case DOWN_UPDATA : int factor = msg.arg1; if (mOnZipDownLoadAndUnpackListener != null) { mOnZipDownLoadAndUnpackListener .onDownLoading(factor); } break; case DOWN_FINISH : if (mOnZipDownLoadAndUnpackListener != null) { mOnZipDownLoadAndUnpackListener.onDownLoadFinish(); } break; case DOWN_ERROR : if (mOnZipDownLoadAndUnpackListener != null) { mOnZipDownLoadAndUnpackListener.onDownLoadError(); } break; case UNPACK_BEGIN : if (mOnZipDownLoadAndUnpackListener != null) { mOnZipDownLoadAndUnpackListener.onZipUnpackStart(); } break; case UNPACK_END : if (mOnZipDownLoadAndUnpackListener != null) { mOnZipDownLoadAndUnpackListener.onZipUnpackFinish(); } break; case UNPACK_ERROR: break; default : break; } } }; }; public ZipDownLoadHelper(Context context) { this.mContext = context; } /** * 开启线程 * * @param url */ public void startDownLoadAndZip(final String url) { mDownLoadThread = new Thread() { @Override public void run() { sendMessage(DOWN_BEGIN, 0); // Temp folder for holding asset during download File zipDir = ExternalStorage.getSDCacheDir(mContext, "tmp"); // File path to store .zip file before unzipping File zipFile = new File(zipDir.getPath() + "/temp.zip"); // Folder to hold unzipped output File outputDir = ExternalStorage.getSDCacheDir(mContext, "wms"); try { download(url, zipFile, zipDir); unzipFile(zipFile, outputDir); } finally { zipFile.delete(); } } }; mDownLoadThread.start(); } @SuppressWarnings("deprecation") public void destroyThread() { mDownLoadThread.stop(); } /** * 下载文件 * * @param down_url * @param output * @param tmpDir */ private void download(String down_url, File output, File tmpDir) { InputStream inputStream = null; OutputStream outputStream = null; File tmp = null; int down_step = 1;// 提示step int totalSize = 0; int downloadCount = 0;// 已经下载好的大小 int updateCount = 0;// 已经上传的文件大小 try { tmp = File.createTempFile("download", ".tmp", tmpDir); URL url = new URL(down_url); HttpURLConnection httpURLConnection = (HttpURLConnection) url .openConnection(); httpURLConnection.setConnectTimeout(30 * 1000); httpURLConnection.setReadTimeout(30 * 1000); // 获取下载文件的size totalSize = httpURLConnection.getContentLength(); inputStream = new URL(down_url).openStream(); outputStream = new BufferedOutputStream(new FileOutputStream(tmp)); byte[] buffer = new byte[BUFFER_SIZE]; int readsize = 0; while ((readsize = inputStream.read(buffer)) != -1) { outputStream.write(buffer, 0, readsize); downloadCount += readsize;// 时时获取下载到的大小 // 每次增长1% if (updateCount == 0 || (downloadCount * 100 / totalSize - down_step) >= updateCount) { updateCount += down_step; sendMessage(DOWN_UPDATA, updateCount); } } if (httpURLConnection != null) { httpURLConnection.disconnect(); } tmp.renameTo(output); tmp = null; } catch (IOException e) { sendMessage(DOWN_ERROR, 0); throw new RuntimeException(e); } finally { try { if (tmp != null) { tmp.delete(); tmp = null; } if (inputStream != null) { inputStream.close(); inputStream = null; } if (outputStream != null) { outputStream.close(); outputStream = null; } } catch (Exception e2) { sendMessage(DOWN_ERROR, 0); } sendMessage(DOWN_FINISH, 0); } } private void sendMessage(int flag, int factor) { Message msg = new Message(); switch (flag) { case DOWN_BEGIN :// 开始 case DOWN_FINISH :// 完成 case DOWN_ERROR :// 失败 case UNPACK_BEGIN : case UNPACK_END : case UNPACK_ERROR: break; case DOWN_UPDATA :// 更新进度条 msg.arg1 = factor; break; default : break; } msg.what = flag; handler.sendMessage(msg); } /** * 解压文件 * * @param zipFile * @param destination */ private void unzipFile(File zipFile, File destination) { sendMessage(UNPACK_BEGIN, 0); ZipUnPack decomp = new ZipUnPack(zipFile.getPath(), destination.getPath() + File.separator); Boolean isOk = decomp.unzip(); if(!isOk) { sendMessage(UNPACK_ERROR, 0); } else { sendMessage(UNPACK_END, 0); } } /** * 绑定监听 * * @param listener */ public void setOnZipDownLoadAndUnpackListener( OnZipDownLoadAndUnpackListener listener) { this.mOnZipDownLoadAndUnpackListener = listener; } public interface OnZipDownLoadAndUnpackListener { /** * 下载开始 */ public void onDownLoadStart(); /** * 下载更新 * * @param factor */ public void onDownLoading(int factor); /** * 下载失败 */ public void onDownLoadError(); /** * 下载完成 */ public void onDownLoadFinish(); /** * 解压开始 */ public void onZipUnpackStart(); /** * 解压失败 */ public void onZipUnpackError(); /** * 解压完成 */ public void onZipUnpackFinish(); }}没有认真地检查，可能有bug，使用的伙伴请自己debug下，并通知我一下，谢谢
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