1.创建URL地址 --> String urlPath
URL url = new URL(uriPath);
2.打开一个网络链接
HttpURLConnection conn = url.openConnection();
3.判断数据返回的状态吗(响应码)
int responseCode = conn.getResponseCode();
4.判断如果responseCode等于200,说明资源找到了,需要将资源读取进手机
InputStream is = conn.getInputStream();
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