程序下载zip文件从url和解压与适当的目录结构在android

Question

你好，请建议我从url下载zip文件并在android中使用合适的目录结构提取的程序。实际上我已经为此编写了代码，但是这个程序不维护文件夹结构。将所有文件解压缩到指定的目标目录。请建议。

  public class AndroidQAActivity extends Activity {
      EditText eText;
      private static Random random = new Random(Calendar.getInstance().getTimeInMillis());
      private ProgressDialog mProgressDialog;
        String unzipLocation = Environment.getExternalStorageDirectory() + "/test.zip/";
        String zipFile =Environment.getExternalStorageDirectory() + "/test.zip";
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
   // setContentView(R.layout.main);
    DownloadMapAsync mew = new DownloadMapAsync();
    mew.execute("http://alphapluss.ecotechservices.com/Downloads/10228.zip");
  }

class DownloadMapAsync extends AsyncTask<String, String, String> {
       String result ="";
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        mProgressDialog = new ProgressDialog(AndroidQAActivity.this);
        mProgressDialog.setMessage("Downloading Zip File..");
        mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        mProgressDialog.setCancelable(false);
        mProgressDialog.show();

    }
    @Override
    protected String doInBackground(String... aurl) {
        int count;
    try {

    URL url = new URL(aurl[0]);
    URLConnection conexion = url.openConnection();
    conexion.connect();
    int lenghtOfFile = conexion.getContentLength();
    InputStream input = new BufferedInputStream(url.openStream());
    OutputStream output = new FileOutputStream(zipFile);
    byte data[] = new byte[1024];
    long total = 0;
        while ((count = input.read(data)) != -1) {
            total += count;
            publishProgress(""+(int)((total*100)/lenghtOfFile));
            output.write(data, 0, count);
        }
        output.close();
        input.close();
        result = "true";
    } catch (Exception e) {
        result = "false";
    }
    return null;
    }
    protected void onProgressUpdate(String... progress) {
         Log.d("ANDRO_ASYNC",progress[0]);
         mProgressDialog.setProgress(Integer.parseInt(progress[0]));
    }
    @Override
    protected void onPostExecute(String unused) {
        mProgressDialog.dismiss();
        if(result.equalsIgnoreCase("true")){
        try {
            unzip();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        }
        else{
        }
    }
}

  public void unzip() throws IOException {
        mProgressDialog = new ProgressDialog(AndroidQAActivity.this);
        mProgressDialog.setMessage("Please Wait...Extracting zip file ... ");
        mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        mProgressDialog.setCancelable(false);
        mProgressDialog.show();
        new UnZipTask().execute(zipFile, unzipLocation);
         }


private class UnZipTask extends AsyncTask<String, Void, Boolean> {
  @SuppressWarnings("rawtypes")
  @Override
  protected Boolean doInBackground(String... params) {
      String filePath = params[0];
      String destinationPath = params[1];
      File archive = new File(filePath);
      try {

         ZipFile zipfile = new ZipFile(archive);
          for (Enumeration e = zipfile.entries(); e.hasMoreElements();) {
              ZipEntry entry = (ZipEntry) e.nextElement();
              unzipEntry(zipfile, entry, destinationPath);
          }

            UnzipUtil d = new UnzipUtil(zipFile, unzipLocation); 
            d.unzip();
      } catch (Exception e) {
          return false;
      }
      return true;
  }
  @Override
  protected void onPostExecute(Boolean result) {
      mProgressDialog.dismiss();
  }

  private void unzipEntry(ZipFile zipfile, ZipEntry entry,
          String outputDir) throws IOException {
      if (entry.isDirectory()) {
          createDir(new File(outputDir, entry.getName())); 
          return;
      }
      File outputFile = new File(outputDir, entry.getName());
      if (!outputFile.getParentFile().exists()) {
          createDir(outputFile.getParentFile());
      }
     // Log.v("", "Extracting: " + entry);
      BufferedInputStream inputStream = new BufferedInputStream(zipfile.getInputStream(entry));
      BufferedOutputStream outputStream = new BufferedOutputStream(new FileOutputStream(outputFile));
      try {
      } finally {
        outputStream.flush();
        outputStream.close();
        inputStream.close();

      }
  }
  private void createDir(File dir) {
      if (dir.exists()) {
          return;
      }
      if (!dir.mkdirs()) {
          throw new RuntimeException("Can not create dir " + dir);
      }
  }}

}

       **And this is my UnzipUtil Class**
       public class UnzipUtil { 
  private String _zipFile; 
  private String _location; 
  public UnzipUtil(String zipFile, String location) { 
    _zipFile = zipFile; 
    _location = location; 
    _dirChecker(""); 
  } 
  public void unzip() { 
    try  { 
      FileInputStream fin = new FileInputStream(_zipFile); 
      ZipInputStream zin = new ZipInputStream(fin); 
      ZipEntry ze = null; 
      while ((ze = zin.getNextEntry()) != null) { 
        Log.v("Decompress", "Unzipping " + ze.getName()); 
        if(ze.isDirectory()) { 
          _dirChecker(ze.getName()); 
        } else { 
          FileOutputStream fout = new FileOutputStream(_location + ze.getName()); 
       //   for (int c = zin.read(); c != -1; c = zin.read()) { 
         //   fout.write(c); 

            byte[] buffer = new byte[8192];
             int len;
             while ((len = zin.read(buffer)) != -1) {
                 fout.write(buffer, 0, len);
             }
             fout.close();
        //  } 
          zin.closeEntry(); 
         // fout.close(); 
        } 
      } 
      zin.close(); 
    } catch(Exception e) { 
      Log.e("Decompress", "unzip", e); 
    } 
  } 
  private void _dirChecker(String dir) { 
    File f = new File(_location + dir); 
    if(!f.isDirectory()) { 
      f.mkdirs(); 
    } 
  } 
}

Answer 1

我和你们分享一些url首先你们想要下载像下面的stackoverflow的链接所示的文件

在Android上以编程方式下载文件，然后将文件从zip中解压缩，如下链接所示