android开发之获得网络资源

android获取网络资源

1.生成url对象
2.创建连接
3.获取数据

例one：
            /* 定义获取文件内容的URL */
            URL myURL = new URL( "http://5billion.com.cn/poem.txt");
            /* 打开URL链接 */
            URLConnection ucon = myURL.openConnection();
           
            /* 使用InputStreams，从URLConnection读取数据*/
            InputStream is = ucon.getInputStream();
            BufferedInputStream bis = new BufferedInputStream(is);

例two：
            URL iconURL = new URL("http://www.google.com"+ gwh.getIconURL());
            URLConnection conn = iconURL.openConnection();
            conn.connect();
            InputStream is = conn.getInputStream();
            BufferedInputStream bis = new BufferedInputStream(is);


当获取bufferedInputStream时，生成字符串或图片方法：
1.字符串：
            /* 用ByteArrayBuffer做缓存 */
            ByteArrayBuffer baf = new ByteArrayBuffer(50);
            int current = 0;
            while((current = bis.read()) != -1){
                 baf.append((byte)current);
            }
           
            /* 将缓存的内容转化为String， 用UTF-8编码 */
            myString = EncodingUtils.getString(baf.toByteArray(), "UTF-8");
            //myString = new String(baf.toByteArray());

2.图片：
            Bitmap bm = null;
            bm = BitmapFactory.decodeStream(bis);