1.下载方法

private File download() {
  HomeActivity app = HomeActivity.homeActivity();
  SpTryListenData spData = SpTryListenData.getInstance();
  String httpUrl="xxxxxxxxxxxxxxxxxxx"; 

// 后台地址
  Log.e("","cynos:downLoad state = 0");
  final String fileName = "MobileMusic503_014732W_feiyinghe.apk";

//下载文件的名字
  Log.e("","cynos:downLoad state = 1");
  int downLoad_num = 0;
  boolean downOK=false;
  final File file = new File(spData.downloadDir.getPath()+ "/" + fileName);

//下载文件的路径
  Log.e("","cynos:downLoad state = 2");
  try {
   URL url = new URL(httpUrl);
   Log.e("","cynos:downLoad state = "+httpUrl);
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setConnectTimeout(60000);//jdk 1.5换成这个,连接超时
          conn.setReadTimeout(60000);//jdk 1.5换成这个,读操作超时
    InputStream is = conn.getInputStream();
    FileOutputStream fos = new FileOutputStream(file);
    byte[] buf = new byte[256];
    Log.i("Test", "cynos:downLoad wait");
    conn.connect();
    Log.i("Test", "cynos:downLoad connect OK !is downloading now");
    double count = 0;
    int downTime=0;
    int fileLength =  conn.getContentLength();
    Log.i("Test", "cynos:maxSize = "+fileLength);
    if (conn.getResponseCode() >= 400) {
    } else {
      boolean wifi=false;
     while (count <= 100) {
      if (is != null) {
       int numRead = is.read(buf);
       int loading = (downLoad_num/(fileLength/100));
       Log.e("", "cynos:downLoad_num = " + downLoad_num+"/"+fileLength+"   进度:"+loading);
       Message message=handler.obtainMessage();
       message.what=100;
       message.obj=loading;
       handler.sendMessage(message);
       downLoad_num += numRead; 
       downTime++;
       if (numRead <= 0) {  
        break;
       } else {
        fos.write(buf, 0, numRead);
       }
      } else {
       break;
      }
     }
    }
    
    Log.i("Test", "over:downLoad_num " + downLoad_num);
    Log.i("Test", "over:fileLength " + fileLength);
    if (downLoad_num+100 >= fileLength)
    {
     mProgress.dismiss();
     app.notifyShowToast("已下载咪咕音乐客户端 "+"\n"+file.getPath());
     Log.e("", "cynos:downLoad_num = "+file.getPath());
     Intent intent = new Intent();
     //执行动作
     intent.setAction(Intent.ACTION_VIEW);
     //执行的数据类型
     intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
     intent.setDataAndType(Uri.parse("file://" +file.getPath()), "application/vnd.android.package-archive");
     startActivity(intent);
     
    }
    
    conn.disconnect();
    fos.close();
    is.close();

} catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   app.hideProgressBar();
   app.notifyShowToast("下载失败,请检查网络连接或重新下载");
  }
  return file;
 }

2. 下载提示框。ProgressDialog初始