本文提供了2段Android代码，实现了从Android客户端下载ZIP文件并且实现ZIP文件的解压功能，非常实用，有需要的Android开发者可以尝试一下。

下载：

DownLoaderTask.java

  try {
   mUrl = new URL(url);
   String fileName = new File(mUrl.getFile()).getName();
   mFile = new File(out, fileName);
   Log.d(TAG, \"out=\"+out+\", name=\"+fileName+\",mUrl.getFile()=\"+mUrl.getFile());
  } catch (MalformedURLException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

 }

 @Override
 protected void onPreExecute() {
  // TODO Auto-generated method stub
  //super.onPreExecute();
  if(mDialog!=null){
   mDialog.setTitle(\"Downloading...\");
   mDialog.setMessage(mFile.getName());
   mDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
   mDialog.setOnCancelListener(new OnCancelListener() {

    @Override
    public void onCancel(DialogInterface dialog) {
     // TODO Auto-generated method stub
     cancel(true);
    }
   });
   mDialog.show();
  }
 }
 @Override
 protected Long doInBackground(Void... params) {
  // TODO Auto-generated method stub
  return download();
 }
 @Override
 protected void onProgressUpdate(Integer... values) {
  // TODO Auto-generated method stub
  //super.onProgressUpdate(values);
  if(mDialog==null)
   return;
  if(values.length>1){
   int contentLength = values[1];
   if(contentLength==-1){
    mDialog.setIndeterminate(true);
   }
   else{
    mDialog.setMax(contentLength);
   }
  }
  else{
   mDialog.setProgress(values[0].intValue());
  }
 }
 @Override
 protected void onPostExecute(Long result) {
  // TODO Auto-generated method stub
  //super.onPostExecute(result);
  if(mDialog!=null&&mDialog.isShowing()){
   mDialog.dismiss();
  }
  if(isCancelled())
   return;
  ((MainActivity)mContext).showUnzipDialog();
 }
 private long download(){
  URLConnection connection = null;
  int bytesCopied = 0;
  try {
   connection = mUrl.openConnection();
   int length = connection.getContentLength();
   if(mFile.exists()&&length == mFile.length()){
    Log.d(TAG, \"file \"+mFile.getName()+\" already exits!!\");
    return 0l;
   }
   mOutputStream = new ProgressReportingOutputStream(mFile);
   publishProgress(0,length);
   bytesCopied =copy(connection.getInputStream(),mOutputStream);
   if(bytesCopied!=length&&length!=-1){
    Log.e(TAG, \"Download incomplete bytesCopied=\"+bytesCopied+\", length\"+length);
   }
   mOutputStream.close();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  return bytesCopied;
 }
 private int copy(InputStream input, OutputStream output){
  byte[] buffer = new byte[1024*8];
  BufferedInputStream in = new BufferedInputStream(input, 1024*8);
  BufferedOutputStream out  = new BufferedOutputStream(output, 1024*8);
  int count =0,n=0;
  try {
   while((n=in.read(buffer, 0, 1024*8))!=-1){
    out.write(buffer, 0, n);
    count+=n;
   }
   out.flush();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }finally{
   try {
    out.close();
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
   try {
    in.close();
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  }
  return count;
 }
 private final class ProgressReportingOutputStream extends FileOutputStream{
  public ProgressReportingOutputStream(File file)
    throws FileNotFoundException {
   super(file);
   // TODO Auto-generated constructor stub
  }
  @Override
  public void write(byte[] buffer, int byteOffset, int byteCount)
    throws IOException {
   // TODO Auto-generated method stub
   super.write(buffer, byteOffset, byteCount);
      mProgress += byteCount;
      publishProgress(mProgress);
  }

 }
}