这次实现了简单的从网络更新tips.txt

先检查是否有更新,使用的sae的空间

网址是txtfan.sinaapp.com

public static Boolean check(Context context, String path) throws Exception {		String date = "";		String formerdate = "";		SharedPreferences settings = context.getSharedPreferences("date",				Context.MODE_PRIVATE);		formerdate = settings.getString("data", null);// 读取之前的更新日期		HttpPost httpRequest = new HttpPost(path);		try {			// 取得HTTP response			HttpResponse httpResponse = new DefaultHttpClient()					.execute(httpRequest);			// 若状态码为200 ok			if (httpResponse.getStatusLine().getStatusCode() != 404) {				// 取出回应字串				date = EntityUtils.toString(httpResponse.getEntity());			} else {				date = "0";			}		} catch (ClientProtocolException e) {			date = "0";			e.printStackTrace();		} catch (UnsupportedEncodingException e) {			date = "0";			e.printStackTrace();		} catch (IOException e) {			date = "0";			e.printStackTrace();		}		SharedPreferences.Editor editor = settings.edit();// 保存现在的更新日期		editor.putString("data", date);		editor.commit();		if (!date.equals(formerdate)) {			return true;		} else {			return false;		}	}

public static Boolean getTipsOnline(String path) throws Exception {		File fileTip = new File(DATA_PATH + "tips.txt");		if (fileTip.exists()) {			fileTip.renameTo(new File(DATA_PATH + System.currentTimeMillis()					+ "bktips.txt"));		}		URL url = new URL(path);		HttpURLConnection conn = (HttpURLConnection) url.openConnection();		conn.setRequestMethod("GET");		conn.setConnectTimeout(5 * 1000);		InputStream inStream = conn.getInputStream();// 通过输入流获取html数据		byte[] data = StreamTool.readInputStream(inStream);// 得到html的二进制数据		DataOutputStream dataOutputStream = new DataOutputStream(				new FileOutputStream(DATA_PATH + "tips.txt"));		dataOutputStream.write(data);		dataOutputStream.flush();		return true;	}