Android

Ps：最近一有空就抽时间捞以前一些用过的但是没记录的小技能。

/** * 获取zipfile大小 * @param path * @return */ public static long getZipFileSize(File path) { long size = 0; ZipFile mZipFile = null; try { mZipFile = new ZipFile(path); Enumeration<? extends ZipEntry> enumeration = mZipFile.entries(); while (enumeration.hasMoreElements()) { size += enumeration.nextElement().getSize(); } } catch (IOException e) { e.printStackTrace(); } return size; } /** * 解压 * @param inputPath * @param outputPath */ public static void unZipFile(Activity mActivity, String inputPath, String outputPath) { long inPathFileSize = getZipFileSize(new File(inputPath)); try { ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(inputPath)); if (zipInputStream == null || zipInputStream.available() == 0) { showToast("Zip File Error"); return; } String pathFileName; ZipEntry mEntry; while ((mEntry = zipInputStream.getNextEntry()) != null) { pathFileName = mEntry.getName(); String currentPathName = ""; if (mEntry.isDirectory()) { pathFileName = pathFileName.substring(0, pathFileName.length() - 1); currentPathName = outputPath + File.separator + pathFileName; new File(currentPathName).mkdirs(); } else { File file = new File(outputPath + "/" + pathFileName); if (!file.exists()) { file.getParentFile().mkdirs(); file.createNewFile(); } FileOutputStream outputStream = new FileOutputStream(file); int len; long count = 0; byte[] buffer = new byte[1024]; while ((len = zipInputStream.read(buffer)) != -1) { count += len; final int progress = (int) ((count * 100) / inPathFileSize); mActivity.runOnUiThread(new Runnable() { @Override public void run() { Log.e("progress", "progress: " + progress); } }); outputStream.write(buffer, 0, len); outputStream.flush(); } outputStream.close(); } } } catch (Exception e) { e.printStackTrace(); } } /*** * 读取文件 * @param path * @return */ public static String readFileContent(String path) { File file = new File(path); StringBuffer stringBuffer = new StringBuffer(); if (!file.exists()) { showToast("文件不存在！"); } else { try { InputStream inputStream = new FileInputStream(file); InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "UTF-8"); BufferedReader bufferedReader = new BufferedReader(inputStreamReader); stringBuffer = new StringBuffer(); String line; while ((line = bufferedReader.readLine()) != null) { stringBuffer.append(line); } inputStream.close(); } catch (Exception e) { e.printStackTrace(); } } return stringBuffer.toString(); }

自我感觉注释还是很清楚的，第三个方法是附带的，自己写demo的时候肯定要读取个文件试试，解压的时候一般都是伴随着进度条的显示，由于是耗时操作，需要开一个线程使用。可以写一个接口去设置进度，如果存在错误请及时指出，谢谢。