android连接服务器下载文件工具类
public static File downLoad(String serverPath,String savedPath,ProgressDialog dialog){ try { URL url=new URL(serverPath); HttpURLConnection _conn=(HttpURLConnection) url.openConnection(); _conn.setRequestMethod("GET"); _conn.setConnectTimeout(5000); int code=_conn.getResponseCode(); if(code==200){ //设置进度条的长度 dialog.setMax(_conn.getContentLength()); InputStream is=_conn.getInputStream(); File _file=new File(savedPath); FileOutputStream _FileOutputStream=new FileOutputStream(_file); int len=0; byte[] buffer= new byte[1024]; int _total=0; while((len=is.read(buffer))!=-1){ _FileOutputStream.write(buffer, 0,len); _total+=len; dialog.setProgress(_total); Thread.sleep(20); } _FileOutputStream.flush(); _FileOutputStream.close(); is.close(); return _file; }else { return null; } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); return null; } }
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