android 下载文件

 /**
     * 从网上下载
     *@param url 下载路径
     *@param outputFile 创建本地保存流的文件
     *@return
    
     * @return 下载失败返回1（比如没有网络等情况）下载成功返回0
     */
    public static int downloadFile(String urlPsth, File outputFile) {
	int result=0;
	try {
	    URL url = new URL(urlPsth);
	    HttpURLConnection conn =(HttpURLConnection) url.openConnection();
	    conn.setDoInput(true);
	    conn.connect();
	  if(  conn.getResponseCode() == HttpURLConnection.HTTP_OK)
	  {
	      InputStream is = conn.getInputStream();
		    FileOutputStream fos = new FileOutputStream(outputFile);
		    byte[] bt = new byte[1024];
		    int i = 0;
		    while ((i = is.read(bt)) > 0) {
			fos.write(bt, 0, i);
		    }
		    fos.flush();
		    fos.close();
		    is.close(); 
		    
	  }else {
	    result=1;
	}
	   
	} catch (FileNotFoundException e) {
	    result=1; 
	} catch (IOException e) {
	    result=1; 
	}
	return result;
    }