我是android的新手我试图保存登录会话并在每次向服务器发送请求时发送它,我的Web服务是PHP(Zend框架2)。
此代码用于识别用户:
$auth = Zend_Auth::getInstance();
$IdentityObj = $auth->getIdentity();
可以保存会话并像我使用网络浏览器一样发送,而不会对我的网络服务进行任何更改。
答案 0 :(得分:3)
是的,确实如此。您只需使用SharedPreferences存储会话。
这个想法是,在您登录后,我猜您会返回某种会话ID或其他内容。你只需要存储它。然后,在子句执行中,您只需在执行任何请求之前获取该会话。
SharedPreferences preferences =
getSharedPreferences("com.blabla.yourapp", Context.MODE_PRIVATE);
//Save it
preferences.edit().putString("session", <yoursessiontoken>).commit();
//Fetch it
// The second parameter is the default value.
preferences.getString("session", "");
无论如何,你最好阅读文档以真正理解你在做什么。
答案 1 :(得分:3)
使用SharedPreferences
是一种在Android中保存和检索关键值对数据的方法,也是在整个应用程序中保持会话的方法。
要与SharedPreferences
合作,请执行以下步骤:
通过将两个参数传递给构造函数(String和integer)来初始化共享SharedPreferences
接口
// Sharedpref file name
private static final String PREF_NAME = "PreName";
// Shared pref mode
int PRIVATE_MODE = 0;
//Initialising the SharedPreferences
SharedPreferences pref = getApplicationContext()
.getSharedPreferences("MyPref", 0); // 0 - for private mode
使用编辑器界面及其方法修改SharedPreferences值并存储数据以供将来检索
//Initialising the Editor
Editor editor = pref.edit();
editor.putBoolean("key_name", true); // Storing boolean - true/false
editor.putString("key_name", "string value"); // Storing string
editor.putInt("key_name", "int value"); // Storing integer
editor.putFloat("key_name", "float value"); // Storing float
editor.putLong("key_name", "long value"); // Storing long
editor.commit(); // commit changes
检索数据:
可以通过调用getString()
(For string)方法从保存的首选项中检索数据。请记住,应在共享首选项上调用此方法,而不是在编辑器上
// returns stored preference value
// If value is not present return second param value - In this case null
pref.getString("key_name", null); // getting String
pref.getInt("key_name", null); // getting Integer
pref.getFloat("key_name", null); // getting Float
pref.getLong("key_name", null); // getting Long
pref.getBoolean("key_name", null); // getting boolean
最后,清除/删除数据,例如退出
如果要从共享首选项中删除,可以调用remove(“key_name”)
删除该特定值。如果要删除所有数据,请致电clear()
editor.remove("name"); // will delete key name
editor.remove("email"); // will delete key email
editor.commit(); // commit changes
//Following will clear all the data from shared preferences
editor.clear();
editor.commit(); // commit changes
如果您愿意,请点击此链接下载一个简单明了的示例: http://www.androidhive.info/2012/08/android-session-management-using-shared-preferences/
此外,这是我使用的实现类:
import java.util.HashMap;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
public class SessionManager {
// Shared Preferences
SharedPreferences pref;
// Editor for Shared preferences
Editor editor;
// Context
Context _context;
// Shared pref mode
int PRIVATE_MODE = 0;
// Sharedpref file name
private static final String PREF_NAME = "AndroidHivePref";
// All Shared Preferences Keys
private static final String IS_LOGIN = "IsLoggedIn";
// User name (make variable public to access from outside)
public static final String KEY_NAME = "name";
// Email address (make variable public to access from outside)
public static final String KEY_EMAIL = "email";
// Constructor
@SuppressLint("CommitPrefEdits")
public SessionManager(Context context) {
this._context = context;
pref = _context.getSharedPreferences(PREF_NAME, PRIVATE_MODE);
editor = pref.edit();
}
/**
* Create login session
*/
public void createLoginSession(String name, String email) {
// Storing login value as TRUE
editor.putBoolean(IS_LOGIN, true);
// Storing name in pref
editor.putString(KEY_NAME, name);
// Storing email in pref
editor.putString(KEY_EMAIL, email);
// commit changes
editor.commit();
}
/**
* Check login method wil check user login status If false it will redirect
* user to login page Else won't do anything
*/
public void checkLogin() {
// Check login status
if (!this.isLoggedIn()) {
// user is not logged in redirect him to Login Activity
Intent i = new Intent(_context, MainActivity.class);
// Closing all the Activities
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
// Add new Flag to start new Activity
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
// Staring Login Activity
_context.startActivity(i);
}
}
/**
* Get stored session data
*/
public HashMap<String, String> getUserDetails() {
HashMap<String, String> user = new HashMap<String, String>();
// user name
user.put(KEY_NAME, pref.getString(KEY_NAME, null));
// user email id
user.put(KEY_EMAIL, pref.getString(KEY_EMAIL, null));
// return user
return user;
}
/**
* Clear session details
*/
public void logoutUser() {
// Clearing all data from Shared Preferences
editor.clear();
editor.commit();
// After logout redirect user to Loing Activity
Intent i = new Intent(_context, MainActivity.class);
// Closing all the Activities
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
// Add new Flag to start new Activity
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
// Staring Login Activity
_context.startActivity(i);
}
/**
* Quick check for login
**/
// Get Login State
public boolean isLoggedIn() {
return pref.getBoolean(IS_LOGIN, false);
}
}
最后,您必须在活动类的SessionManager
方法中创建此onCreate
类的实例,然后为将在整个过程中使用的会话调用createLoginSession
整个应用程序
// Session Manager Class
SessionManager session;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Session Manager
session = new SessionManager(getApplicationContext());
session.createLoginSession("Username", intentValue);
}
我希望它有所帮助。