Android文件下载

文件下载步骤

1.创建一个HttpURLConnection对象

HttpURLConnection urlConn=(HttpURLConnection)url.openConnection();

2.获得一个InputStream对象

urlConn.getInputStream()

3.访问网络权限

android.permission.INTERNET

访问SCARD

1.得到当前设备SD卡目录

Environment.getExternalStorageDirectory()

2.访问SD卡的权限

android.permission.WRITE_EXTERNAL_STORAGE