android客户端访问后台服务器时常用的一些检查方法

 /**
  * @Title: checkHasNetwork
  * @Description:检查网络连接
  * @param context
  * @return true 有网络 ；false 无网络
  */ 
public static boolean checkHasNetwork(Context context) {
  ConnectivityManager connMgr = (ConnectivityManager) context
    .getSystemService(Context.CONNECTIVITY_SERVICE);
  NetworkInfo netInfo = connMgr.getActiveNetworkInfo();
  if (netInfo == null || !netInfo.isAvailable()) {
   // 没有网络连接
   LogUtil.e("internet__connect", "没有网络连接");
   return false;
  }
  return true;
 }

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 /**
  * 设置网络超时
  *
  * @param clientLoginField
  */
 public static void setConnectionTimeOut(DefaultHttpClient clientLoginField) {
  HttpParams httpParams = clientLoginField.getParams();
  // 设置网络超时参数
  HttpConnectionParams.setConnectionTimeout(httpParams, 30 * 1000);
  HttpConnectionParams.setSoTimeout(httpParams, 30 * 1000);
 }

----------------------------------------------------------------
 /**
  * @author: 
  * @Title: checkNetworkConnected
  * @Description:是否有可用网络
  * @param context
  * @return
  * @date: 2013-4-2 上午11:03:08
  */
 public static boolean checkNetworkConnected(Context context) {
  // 获得手机所有连接管理对象（包括对wi-fi等连接的管理）
  try {
   ConnectivityManager connectivity = (ConnectivityManager) context
     .getSystemService(Context.CONNECTIVITY_SERVICE);
   if (connectivity != null) {
    // 获得网络连接管理的对象
    NetworkInfo info = connectivity.getActiveNetworkInfo();
    if (info != null && info.isConnected()) {
     // 判断当前网络是否已连接
     if (info.getState() == NetworkInfo.State.CONNECTED) {
      return true;
     }
    }
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
  return false;
 }
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 /**
  * 手机号码检查
  */
 public static Boolean phonenumberCheck(String phoneNumber) {

  // 表达式对象
  Pattern p = Pattern.compile("^(1)[0-9]{10}$");

  // 创建 Matcher 对象
  Matcher m = p.matcher(phoneNumber);

  if (!m.matches()) {
   return false;
  }
  return true;
 }
---------------------------------------------------------------------
 /**
  * 取得应用当前的版本号
  *
  * @return
  */
 public static String getCurrentVersion(Context context) {
  String versionName = "";
  try {
   PackageManager packageManager = context.getPackageManager();
   PackageInfo packageInfo = packageManager.getPackageInfo(
     context.getPackageName(), 0);
   versionName = packageInfo.versionName;
  } catch (NameNotFoundException e) {
   e.printStackTrace();
  }
  return versionName;
 }
---------------------------------------------------------------------------
 /**
  * 隐藏界面输入软键盘
  *
  * @param activity
  */
 public static void hideSoftInputFromWindow(Activity activity) {
  InputMethodManager imm = (InputMethodManager) activity
    .getSystemService(Context.INPUT_METHOD_SERVICE);
  if (imm != null) {
   View view = activity.getCurrentFocus();
   if (view != null) {
    imm.hideSoftInputFromWindow(view.getWindowToken(),
      InputMethodManager.RESULT_UNCHANGED_SHOWN);
   }
  }
 }
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 /**
     * 从指定的URL中获取数组
     * @param urlPath
     * @return
     * @throws Exception
     */
    public  String readParse(String urlPath) throws Exception { 
               ByteArrayOutputStream outStream = new ByteArrayOutputStream(); 
               byte[] data = new byte[1024]; 
                int len = 0; 
                URL url = new URL(urlPath); 
                HttpURLConnection conn = (HttpURLConnection) url.openConnection(); 
                InputStream inStream = conn.getInputStream(); 
                while ((len = inStream.read(data)) != -1) { 
                    outStream.write(data, 0, len); 
                } 
                inStream.close(); 
                return new String(outStream.toByteArray());//通过out.Stream.toByteArray获取到写的数据 
            }
----------------------------------------------------------------------------------------
  /**
     * 将参数列表封装成dopost需要得数据类型
     * @param params是传进去map
     * @return 返回dopost要求的形式
     */
 public List<NameValuePair> getNameValuePairList(Map<String, Object> params) {
  List<NameValuePair> nvpsList = new ArrayList<NameValuePair>();

  for (Map.Entry<String, Object> entry : params.entrySet()) {
   String key = entry.getKey();
   String value = entry.getValue() + "";
   nvpsList.add(new BasicNameValuePair(key, value));
  }

  return nvpsList;
 }
---------------------------------------------------------------------------------------------
 /**
     * Json数据的解析
     * @param jsonStr 是传递进去的jsonStr数据
     * @param 解析后以list的形式返回
     * @throws JSONException
     */
 
 private  ArrayList<HashMap<String, Object>> Analysis(String jsonStr) throws JSONException {
        /******************* 解析 ***********************/
        JSONArray jsonArray = null;
        // 初始化list数组对象
        ArrayList<HashMap<String, Object>> list = new ArrayList<HashMap<String, Object>>();
        jsonArray = new JSONArray(jsonStr);
        for (int i = 0; i < jsonArray.length(); i++) {
            JSONObject jsonObject = jsonArray.getJSONObject(i);
            // 初始化map数组对象
            HashMap<String, Object> map = new HashMap<String, Object>();
            map.put("logo", jsonObject.getString("logo"));
            map.put("logoLunbo", jsonObject.getString("logoLunbo"));
            map.put("biaoTi", jsonObject.getString("biaoTi"));
            map.put("yuanJia", jsonObject.getString("yuanJia"));
            map.put("xianJia", jsonObject.getString("xianJia"));
            map.put("id", jsonObject.getInt("id"));
            list.add(map);
        }
        return list;
    }
------------------------------------------------------

 /**
  * 检查对于包名的apk是否安装
  *
  * @return
  */
 private boolean checkAPKInstalled(String packageName) {
  PackageInfo packageInfo = null;
  try {
   packageInfo = this.getPackageManager().getPackageInfo(packageName,
     0);
  } catch (NameNotFoundException e) {
   e.printStackTrace();
  }
  if (packageInfo == null) {
   return false;
  } else {
   return true;
  }
 }

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去除网页标签的方法，用的是正则表达式

public static String removeTagFromText(String content) {
         Pattern p = null;
         Matcher m = null;
         String value = null;
         // 去掉<>标签
         p = Pattern.compile("(<[^>]*>)");
         m = p.matcher(content);
         String temp = content;
         while (m.find()) {
          value = m.group(0);
          temp = temp.replace(value, "");
         }
         // 去掉换行或回车符号
         p = Pattern.compile("(\r+|\n+)");
         m = p.matcher(temp);
         while (m.find()) {
          value = m.group(0);
          temp = temp.replace(value, " ");
         }
         if(temp.length() > 10) {
         return temp.substring(0,10) + "...";
         } else {
return temp + "...";
}
   }

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拼服务器看能否拼通

Process p = Runtime.getRuntime().exec(http://www.baidu.com);
       InputStreamReader r = new InputStreamReader(p.getInputStream());
             LineNumberReader returnData = new LineNumberReader(r);

              String returnMsg = "";
              String line = "";

              while ((line = returnData.readLine()) != null) {
                  System.out.println(line);
                  returnMsg += line;
              }
              System.out.println("sky for return message"+returnMsg);

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 /**     * 递归删除文件和文件夹     * @param file    要删除的根目录     */    public static void RecursionDeleteFile(File file){        if(file.isFile()){            file.delete();            return;        }        if(file.isDirectory()){            File[] childFile = file.listFiles();            if(childFile == null || childFile.length == 0){                file.delete();                return;            }            for(File f : childFile){                RecursionDeleteFile(f);            }            file.delete();        }    }