使用下载管理器下载zip文件

Question

我想从特定的zip链接下载zip文件，然后在android中解压缩该zip文件。我该怎么办？我可以使用android下载管理器吗？

Answer 1

是的，你可以使用它，这里是一个小片段：

DownloadManager dm = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE); 
DownloadManager.Request req = new DownloadManager.Request(Uri.parse("url-of-the-zip")); 
req.setDestinationExternalFilesDir(Environment.DIRECTORY_DOWNLOADS, "filename.zip"); 
long id = dm.enqueue(req); 

的ID以后可以用来请求使用DownloadManager.getUriForDownloadedFile(int)下载的文件的本地URI。要解压文件，你可以使用ZipFile

Answer 2

嗨下载的zip文件路径如下显示，

   URL url = new URL("ZIP_FILE"); 
       HttpURLConnection c = (HttpURLConnection) url.openConnection(); 
       c.setRequestMethod("GET"); 
       c.setDoOutput(true); 
       c.connect(); 

       int lenghtOfFile = c.getContentLength(); 
//    Log.d("ANDRO_ASYNC", "Lenght of file: " + lenghtOfFile); 
       InputStream input = new BufferedInputStream(url.openStream()); 


       Long size = Long.parseLong(String.valueOf(input.available())); 
       StatFs stat = new StatFs(activity.getParent().getFilesDir().getAbsolutePath()); 
       long freeBytes = ((long)stat.getAvailableBlocks()) * stat.getBlockSize(); 
//    Log.e("TOTAL AVAILABLE", "@"+input.available() + " FREE" + freeBytes); 
       if(freeBytes >= size){ 

//     String outFilePath = Environment.getExternalStorageDirectory().toString(); 
        String path = outFilePath +"/TEST"; 

        File myNewFolder = new File(path); 
        if (!myNewFolder.isDirectory()) { 
         myNewFolder.mkdirs(); 
        } 
        path = path+"/"+"FileName"; 
        OutputStream output = new FileOutputStream(path); 
        byte data[] = new byte[1024]; 
        long total = 0; 
        int count = 0; 
        publishProgress(0); 
        while ((count = input.read(data)) != -1) { 
         total += count; 
         publishProgress((int)((total*100)/lenghtOfFile)); 
         output.write(data, 0, count); 
        } 
        output.flush(); 
        output.close(); 
        input.close(); 


        //path your save location 

       } 

解压码是

public void unzipAll(File zipFile, File targetDir) throws IOException { 
     Log.i(TAG, "[METHOD] void unzipAll(zipFile:" + zipFile + ", targetDir:" + targetDir + ")"); 

     ZipInputStream zis = new ZipInputStream(new FileInputStream(zipFile)); 
     ZipEntry zentry = null; 

     // if exists remove 
     if (targetDir.exists()) { 
      FileUtils.deleteDirectory(targetDir); 
      targetDir.mkdirs(); 
     } 
     else { 
      targetDir.mkdirs(); 
     } 
     Log.d(TAG, "targetDir: " + targetDir); 

     // unzip all entries 
     while ((zentry = zis.getNextEntry()) != null) { 
      String fileNameToUnzip = zentry.getName(); 
      File targetFile = new File(targetDir, fileNameToUnzip); 

      // if directory 
      if (zentry.isDirectory()) { 
       (new File(targetFile.getAbsolutePath())).mkdirs(); 
      } 
      else { 
       // make parent dir 
       (new File(targetFile.getParent())).mkdirs(); 
       unzipEntry(zis, targetFile); 
       Log.d(TAG, "Unzip file: " + targetFile); 
      } 
     } 

     zis.close(); 
    } 

    private File unzipEntry(ZipInputStream zis, File targetFile) throws IOException { 
     FileOutputStream fos = new FileOutputStream(targetFile); 

     byte[] buffer = new byte[BUFFER_SIZE]; 
     int len = 0; 
     while ((len = zis.read(buffer)) != -1) { 
      fos.write(buffer, 0, len); 
     } 

     return targetFile; 
    } 

希望这个代码是帮助你.. 我使用此代码下载并解压缩文件