Android zip檔案解壓縮工具類
阿新 • • 發佈：2018-12-21
今天專案提了一個新需求：把html網頁放在本地，如果後臺修改了網頁，手機端要去後臺下載壓縮包並解壓後把本地的網頁跟新成最新的，請求後臺介面，根據返回的結果中的某個欄位判斷是否需要下載zip檔案，如果需要下載，返回的結果中會提供zip檔案下載的地址，下載後並解壓顯示網頁，既然需求提了就得去實現
先來看下實現的效果圖：
檔案下載
解壓後顯示本地HTML：
1.實現檔案的下載
2.檔案解壓縮的工具類：
/** * Created by YuShuangPing on 2018/11/11. */ public class ZipUtils { public static final String TAG = "ZIP"; public ZipUtils() { } /** * 解壓zip到指定的路徑 * * @param zipFileString ZIP的名稱 * @param outPathString 要解壓縮路徑 * @throws Exception */ public static void UnZipFolder(String zipFileString, String outPathString) throws Exception { ZipInputStream inZip = new ZipInputStream(new FileInputStream(zipFileString)); ZipEntry zipEntry; String szName = ""; while ((zipEntry = inZip.getNextEntry()) != null) { szName = zipEntry.getName(); if (zipEntry.isDirectory()) { //獲取部件的資料夾名 szName = szName.substring(0, szName.length() - 1); File folder = new File(outPathString + File.separator + szName); folder.mkdirs(); } else { Log.e(TAG, outPathString + File.separator + szName); File file = new File(outPathString + File.separator + szName); if (!file.exists()) { Log.e(TAG, "Create the file:" + outPathString + File.separator + szName); file.getParentFile().mkdirs(); file.createNewFile(); } // 獲取檔案的輸出流 FileOutputStream out = new FileOutputStream(file); int len; byte[] buffer = new byte[1024]; // 讀取（位元組）位元組到緩衝區 while ((len = inZip.read(buffer)) != -1) { // 從緩衝區（0）位置寫入（位元組）位元組 out.write(buffer, 0, len); out.flush(); } out.close(); } } inZip.close(); } public static void UnZipFolder(String zipFileString, String outPathString, String szName) throws Exception { ZipInputStream inZip = new ZipInputStream(new FileInputStream(zipFileString)); ZipEntry zipEntry; while ((zipEntry = inZip.getNextEntry()) != null) { //szName = zipEntry.getName(); if (zipEntry.isDirectory()) { //獲取部件的資料夾名 szName = szName.substring(0, szName.length() - 1); File folder = new File(outPathString + File.separator + szName); folder.mkdirs(); } else { Log.e(TAG, outPathString + File.separator + szName); File file = new File(outPathString + File.separator + szName); if (!file.exists()) { Log.e(TAG, "Create the file:" + outPathString + File.separator + szName); file.getParentFile().mkdirs(); file.createNewFile(); } // 獲取檔案的輸出流 FileOutputStream out = new FileOutputStream(file); int len; byte[] buffer = new byte[1024]; // 讀取（位元組）位元組到緩衝區 while ((len = inZip.read(buffer)) != -1) { // 從緩衝區（0）位置寫入（位元組）位元組 out.write(buffer, 0, len); out.flush(); } out.close(); } } inZip.close(); } /** * 壓縮檔案和資料夾 * * @param srcFileString 要壓縮的檔案或資料夾 * @param zipFileString 解壓完成的Zip路徑 * @throws Exception */ public static void ZipFolder(String srcFileString, String zipFileString) throws Exception { //建立ZIP ZipOutputStream outZip = new ZipOutputStream(new FileOutputStream(zipFileString)); //建立檔案 File file = new File(srcFileString); //壓縮 LogUtils.LOGE("---->"+file.getParent()+"==="+file.getAbsolutePath()); ZipFiles(file.getParent()+ File.separator, file.getName(), outZip); //完成和關閉 outZip.finish(); outZip.close(); } /** * 壓縮檔案 * * @param folderString * @param fileString * @param zipOutputSteam * @throws Exception */ private static void ZipFiles(String folderString, String fileString, ZipOutputStream zipOutputSteam) throws Exception { LogUtils.LOGE("folderString:" + folderString + "\n" + "fileString:" + fileString + "\n=========================="); if (zipOutputSteam == null) return; File file = new File(folderString + fileString); if (file.isFile()) { ZipEntry zipEntry = new ZipEntry(fileString); FileInputStream inputStream = new FileInputStream(file); zipOutputSteam.putNextEntry(zipEntry); int len; byte[] buffer = new byte[4096]; while ((len = inputStream.read(buffer)) != -1) { zipOutputSteam.write(buffer, 0, len); } zipOutputSteam.closeEntry(); } else { //資料夾 String fileList[] = file.list(); //沒有子檔案和壓縮 if (fileList.length <= 0) { ZipEntry zipEntry = new ZipEntry(fileString + File.separator); zipOutputSteam.putNextEntry(zipEntry); zipOutputSteam.closeEntry(); } //子檔案和遞迴 for (int i = 0; i < fileList.length; i++) { ZipFiles(folderString+fileString+"/", fileList[i], zipOutputSteam); } } } /** * 返回zip的檔案輸入流 * * @param zipFileString zip的名稱 * @param fileString ZIP的檔名 * @return InputStream * @throws Exception */ public static InputStream UpZip(String zipFileString, String fileString) throws Exception { ZipFile zipFile = new ZipFile(zipFileString); ZipEntry zipEntry = zipFile.getEntry(fileString); return zipFile.getInputStream(zipEntry); } /** * 返回ZIP中的檔案列表（檔案和資料夾） * * @param zipFileString ZIP的名稱 * @param bContainFolder 是否包含資料夾 * @param bContainFile 是否包含檔案 * @return * @throws Exception */ public static List<File> GetFileList(String zipFileString, boolean bContainFolder, boolean bContainFile) throws Exception { List<File> fileList = new ArrayList<File>(); ZipInputStream inZip = new ZipInputStream(new FileInputStream(zipFileString)); ZipEntry zipEntry; String szName = ""; while ((zipEntry = inZip.getNextEntry()) != null) { szName = zipEntry.getName(); if (zipEntry.isDirectory()) { // 獲取部件的資料夾名 szName = szName.substring(0, szName.length() - 1); File folder = new File(szName); if (bContainFolder) { fileList.add(folder); } } else { File file = new File(szName); if (bContainFile) { fileList.add(file); } } } inZip.close(); return fileList; } }
3.activity中實現下載解壓顯示html頁面
public class MainActivity extends BaseActivity implements LoginContract.View { .......... private String savePath = FileUtils.getFileDir() + "thinkyun" + File.separator + "download.zip";//下載檔案的儲存絕對路徑 private String unZipPath = FileUtils.getFileDir() + "thinkyun" + File.separator + "download";//解壓的zip檔案路徑 .......... //請求網路成功的返回 @Override public void onLoginSuccess(LoginUserBean2 bean) { int update = bean.getUpdate(); //zip壓縮包的下載地址 downloadUrl = bean.getZipurl(); if (update == 1) {//需要下載新的壓縮包 File file = new File(savePath); if (file.exists()) { file.delete(); } //開始下載ZIP壓縮包 FileDownloadUtils.getInstance().startDownLoadFileSingle(downloadUrl, savePath, new FileDownloadUtils.FileDownLoaderCallBack() { @Override public void downLoadCompleted(BaseDownloadTask task) { LogUtils.LOGD("下載完成========"); try { //解壓ZIP壓縮包 ZipUtils.UnZipFolder(savePath, unZipPath); File file = new File(unZipPath + "/view/homepage/homepage.html"); if (file.exists()) { tv_progress.setVisibility(View.GONE); //顯示html網頁 webView.loadUrl("file:" + unZipPath + "/view/homepage/homepage.html"); } } catch (Exception e) { e.printStackTrace(); } } @Override public void downLoadError(BaseDownloadTask task, Throwable e) { } @Override public void downLoadProgress(BaseDownloadTask task, int soFarBytes, int totalBytes) { tv_progress.setText("下載進度：" + soFarBytes + "/" + totalBytes); } }); } } .......... }
到此就完成了上述功能