Android 從Internet獲取html,圖片

在清單文件中加上網絡訪問權限

<!-- 訪問internet權限 -->

<uses-permissionAndroid:name="android.permission.INTERNET"/>

利用HttpURLConnection對象,我們可以從網絡中獲取網頁數據.

URL url = newURL("http://www.linuxidc.com");

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

conn.setConnectTimeout(5*1000);//設置連接超時

conn.setRequestMethod(“GET”);//以get方式發起請求

if(conn.getResponseCode() != 200) throw new RuntimeException("請求url失敗");

InputStream is =conn.getInputStream();//得到網絡返回的輸入流

Stringresult = readData(is, "GBK");

conn.disconnect();

//第一個參數為輸入流,第二個參數為字符集編碼

public static StringreadData(InputStream inSream, String charsetName) throws Exception{

ByteArrayOutputStreamoutStream = new ByteArrayOutputStream();

byte[]buffer = new byte[1024];

intlen = -1;

while((len = inSream.read(buffer)) != -1 ){

outStream.write(buffer,0, len);

}

byte[]data = outStream.toByteArray();

outStream.close();

inSream.close();

returnnew String(data, charsetName);

}

利用HttpURLConnection對象,我們可以從網絡中獲取文件數據.

URL url = newURL("http://photocdn.sohu.com/20100125/Img269812337.jpg");

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

conn.setConnectTimeout(5*1000);

conn.setRequestMethod("GET");

if(conn.getResponseCode() != 200) throw new RuntimeException("請求url失敗");

InputStream is =conn.getInputStream();

readAsFile(is,"Img269812337.jpg");

public static voidreadAsFile(InputStream inSream, File file) throws Exception{

FileOutputStreamoutStream = new FileOutputStream(file);

byte[]buffer = new byte[1024];

intlen = -1;

while((len = inSream.read(buffer)) != -1 ){

outStream.write(buffer,0, len);

}

     outStream.close();

inSream.close();

}