Android类FileDownloadList分析

public class FileDownloadList {
 
 /**上下文*/
 private Context mContext;
 /**请求对象*/
 private BaseRequestLims fileRequest = null;
 /**进度条对话框*/
 private AlertDialog progressDialog = null;
 /**进度条控件变量*/
 private ProgressBar mProgress;
 /**百分比显示控件*/
 private TextView mProgressPercent;
 
 private File localFile = null;
 /**接收HttpHelper中获取到文件大小后发送的广播，确定文件大小*/
 private DownLoadReceiver receiver;
 /**文件大小*/
 private long fileLength = -1L;
 /**是否已注册广播标志*/
 private boolean castFlag = false;
 /**是否显示进度条标志*/
 private boolean showDialog = false;
 /**文件下载完的回调接口*/
 private Runnable mCallback = null;
 
 private Handler mHandler = new Handler(){
  @Override
  public void handleMessage(Message msg) {
   super.handleMessage(msg);
   int tempSize = (int)localFile.length();
   if(tempSize = fileLength){
       break;
      }
     }
    }
   }.start();
  }
 }
 
 public DownLoadReceiver getReciver()
 {
  return receiver;
 }
}

downloadFile(String fileName, String saveDir, String saveName, Runnable callback)

//下载的子线程
   new Thread(){
    @Override
    public void run() {
     super.run();
     HttpHelper.invoke(request);
    }
   }.start();

new Thread(){
    @Override
    public void run() {
     super.run();
     while(true){
      try{
       Thread.sleep(500);
      }catch (Exception e) {
       e.printStackTrace();
      }
      mHandler.sendMessage(mHandler.obtainMessage());
      //获取下载文件的大小
      int loadedSize = (int)localFile.length();
      if(loadedSize >= fileLength){
       break;
      }
     }
    }
   }.start();

new Thread(){
        @Override
        public void run() {
          super.run();
          HttpHelper.invoke(request);
        }
      }.start();