AndroidWidget实践 --- EverydayTips开发(6)

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;

}