我能够登录系统，并从系统退出。当我从仪表板按回而不从系统登出。我每次都登录系统。如何在不进行登出的情况下限制登录页面来自System.I需要打开Dashbord页面，如果用户没有从系统注销并在访问时间到期时直接登录到
登录
public class Login extends AppCompatActivity implements View.OnClickListener {
EditText userName, Password;
Button login;
public static final String LOGIN_URL = "http://192.168.100.5:84/Token";
public static final String KEY_USERNAME = "UserName";
public static final String KEY_PASSWORD = "Password";
String username, password;
String accesstoken, tokentype, expiresin, masterid, name, access, issue, expires, masterid1;
SessionManagement sessionManagement;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
userName = (EditText) findViewById(R.id.login_name);
Password = (EditText) findViewById(R.id.login_password);
userName.setHint(Html.fromHtml("<font color='#008b8b' style='italic'>Username</font>"));
Password.setHint(Html.fromHtml("<font color='#008b8b'>Password</font>"));
login = (Button) findViewById(R.id.login);
login.setOnClickListener(this);
/* sessionManagement = (SessionManagement) getSharedPreferences("mySharedPref", 0);
if (sessionManagement.isLoggedIn()) {
startActivity(new Intent(getApplicationContext(), Home.class));
} */
}
private void UserLogin() {
username = userName.getText().toString().trim();
password = Password.getText().toString().trim();
StringRequest stringRequest = new StringRequest(Request.Method.POST, LOGIN_URL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject jsonObject = new JSONObject(response);
accesstoken = jsonObject.getString("access_token");
tokentype = jsonObject.getString("token_type");
expiresin = jsonObject.getString("expires_in");
username = jsonObject.getString("userName");
masterid = jsonObject.getString("MasterID");
masterid = masterid.replaceAll("[^\\.0123456789]", "");
masterid1 = jsonObject.getString("MasterID");
name = jsonObject.getString("Name");
access = jsonObject.getString("Access");
issue = jsonObject.getString(".issued");
expires = jsonObject.getString(".expires");
SessionManagement session = new SessionManagement(Login.this);
session.createLoginSession(accesstoken, tokentype, expiresin, username, masterid, name, access, issue, expires);
// session.createLoginSession(masterid1);
openProfile();
} catch (JSONException e) {
Toast.makeText(getApplicationContext(), "Fetch failed!", Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
// Toast.makeText(Login.this, error.toString(), Toast.LENGTH_LONG).show();
Toast.makeText(Login.this, "Please enter valid username and Password", Toast.LENGTH_SHORT).show();
}
}) {
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> params = new HashMap<String, String>();
//params.put("Content-Type", "application/x-www-form-urlencoded; charset=utf-8");
return params;
}
@Override
protected Map<String, String> getParams() {
Map<String, String> map = new HashMap<String, String>();
map.put(KEY_USERNAME, username);
map.put(KEY_PASSWORD, password);
//map.put("access_token", accesstoken);
map.put("grant_type", "password");
return map;
}
};
stringRequest.setRetryPolicy(new DefaultRetryPolicy(
60000, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
private void openProfile() {
Intent intent = new Intent(this, Home.class);
intent.putExtra(KEY_USERNAME, username);
startActivity(intent);
startActivity(intent);
}
@Override
public void onClick(View v) {
UserLogin();
}
}
SessionManagement 用于存储访问令牌和其他所需信息
public class SessionManagement {
SharedPreferences pref;
SharedPreferences.Editor editor;
Context _context;
// Shared pref mode
int PRIVATE_MODE = 0;
// Sharedpref file name
private static final String PREF_NAME = "AndroidHivePref";
private static final String IS_LOGIN = "IsLoggedIn";
public static final String KEY_access_token = "access_token";
public static final String KEY_token_type = "token_type";
public static final String Key_EXPIRES_IN = "expires_in";
public static final String KEY_USERNAME = "userName";
public static final String KEY_MASTER_ID = "MasterID";
public static final String KEY_MASTER_ID1 = "MasterID";
public static final String KEY_Name = "Name";
public static final String KEY_Access = "Access";
public static final String KEY_Issued = ".issued";
public static final String KEY_expires = ".expires";
// Constructor
public SessionManagement(Context context) {
this._context = context;
pref = _context.getSharedPreferences(PREF_NAME, PRIVATE_MODE);
editor = pref.edit();
}
SettingFragment context;
public void createLoginSession(String accesstoken, String tokentype, String expiresin, String username, String masterId, String name, String access, String issued, String expires) {
editor.putBoolean(IS_LOGIN, true);
editor.putString(KEY_access_token, accesstoken);
editor.putString(KEY_token_type, tokentype);
editor.putString(Key_EXPIRES_IN, expiresin);
editor.putString(KEY_USERNAME, username);
editor.putString(KEY_MASTER_ID, masterId);
editor.putString(KEY_MASTER_ID1, masterId);
editor.putString(KEY_Name, name);
editor.putString(KEY_Access, access);
editor.putString(KEY_Issued, issued);
editor.putString(KEY_expires, expires);
editor.apply();
String user_new_access_token = pref.getString(KEY_access_token, null);
String user_new_access_tokentype = pref.getString(KEY_token_type, null);
String user_name_expiresin = pref.getString(Key_EXPIRES_IN, null);
String user_name_Username = pref.getString(KEY_USERNAME, null);
String user_name_masterID = pref.getString(KEY_MASTER_ID, null);
String user_name_name = pref.getString(KEY_Name, null);
String user_name_access = pref.getString(KEY_Access, null);
String user_name_issued = pref.getString(KEY_Issued, null);
String user_name_expires = pref.getString(KEY_expires, null);
String user_name_masterID1 = pref.getString(KEY_MASTER_ID1, null);
Log.d("TAG", "Access Token :" + accesstoken + user_new_access_token);
Log.d("TAG", "TokenType:" + user_new_access_tokentype);
Log.d("TAG", "Expires in:" + user_name_expiresin);
Log.d("TAG", "UserName:" + user_name_Username);
Log.d("TAG", "MasterID:" + user_name_masterID);
Log.d("TAG", "Name:" + user_name_name);
Log.d("TAG", "Access:" + user_name_access);
Log.d("TAG", "Issued:" + user_name_issued);
Log.d("TAG", "Expires:" + user_name_expires);
Log.d("TAG", "user_name_masterID1:" + user_name_masterID1);
// String user_name_new = pref.getString(KEY_access_token, null);
// Log.d("TAG", " :" + accesstoken + " user_name_new:" + user_name_new);
// Log.d(tokentype, "admin");
//ad Log.d(expiresin, "expiresin");
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, Login.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_USERNAME, pref.getString(KEY_USERNAME, null));
user.put(KEY_access_token, pref.getString(KEY_access_token, null));
user.put(KEY_token_type, pref.getString(KEY_token_type, null));
// user.put(KEY_TOKEN_TYPE, pref.getString(KEY_TOKEN_TYPE, null));
// user.put(KEY_MASTER_ID, pref.getString(KEY_MASTER_ID, null));
// user.put(KEY_access_token, pref.getString(KEY_access_token, null));
// user.put(KEY_NAME, pref.getString(KEY_NAME, null));
//user.put(KEY_Access, pref.getString(KEY_Access, null));
// return user
return user;
}
/**
* Clear session details
*/
public void logoutUser() {
editor.clear();
editor.commit();
// After logout redirect user to Loing Activity
Intent i = new Intent(_context, Login.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);
}
public String getMasterId() {
String masterID = pref.getString(KEY_MASTER_ID, null);
return masterID;
}
public String getMasterId1() {
String masterID = pref.getString(KEY_MASTER_ID1, null);
return masterID;
}
public String getAccess() {
String accessID = pref.getString(KEY_Access, null);
return accessID;
}
public String getKeyName() {
String KeyName = pref.getString(KEY_Name, null);
return KeyName;
}
public String getAccesstToken() {
String user_new_access_token = pref.getString(KEY_access_token, null);
return user_new_access_token;
}
public void clear() {
Log.d("TAg", "Full Cleared");
editor.clear();
// editor.remove(KEY_MASTER_ID);
// editor.remove(KEY_USERNAME);
editor.commit();
}
/**
* Quick check for login
**/
// Get Login State
public boolean isLoggedIn() {
return pref.getBoolean(IS_LOGIN, false);
}
}
如果用户没有退出，我如何指向仪表板页面 系统
答案 0 :(得分：1)
我已经在登录页面上检查了会话。如果 isLoggedIn（）== true ，那么我已切换到仪表板页面。
<强> sessionmanagement
public boolean isLoggedIn() {
System.out.println("Pref" + pref.getBoolean(IS_LOGIN, false));
return pref.getBoolean(IS_LOGIN, false);
}
public boolean checkLogin() {
// Check login status
if (!this.isLoggedIn()) {
// user is not logged in redirect him to Login Activity
Intent i = new Intent(_context, Login.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);
}
// return false;
return false;
}
<强>登录
if (session.isLoggedIn() == true) {
Intent intent = new Intent(this, Home.class);
startActivity(intent);
}
也可以检查会话到期时间