我的代码中存在问题，即使我插入true
，方法也总是返回false public boolean isLoggedIn(){
return pref.getBoolean("login", false);
}
即使我在检查前添加了true，这段代码也会返回false
* */
public void checkLogin(){
// Check login status
editor.putBoolean("login", true);// even if add true it will return false
if(!this.isLoggedIn()){
Toast.makeText(_context, " Login", Toast.LENGTH_SHORT).show();
我要做的是在操作栏中点击register按钮后会给用户注册活动。然后他将插入用户名和密码并将其返回到mainactivity。如果他再次单击register按钮，它应该将他发送到另一个活动，因为他的登录
在我的代码中，即使他正在登录，也会将他发送到注册活动，因为我在上面解释的false return是我的代码
sessionmanager
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";
//SharedPreferences.Editor editor;
SharedPreferences.Editor editor;
// Constructor
public SessionManager(Context context){
this._context = context;
// pref = PreferenceManager.getDefaultSharedPreferences(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
Toast.makeText(_context, "Create", Toast.LENGTH_SHORT).show();
System.out.println("login1");
editor.putBoolean("login", true);
System.out.println(pref.getBoolean("login", false));
// Storing name in pref
editor.putString("name", name);
// Storing email in pref
editor.putString("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
// editor.putBoolean("login", true);
editor.putBoolean("login", true);
if(!this.isLoggedIn()){
Toast.makeText(_context, " Login", Toast.LENGTH_SHORT).show();
// user is not logged in redirect him to Login Activity
Intent i = new Intent(_context, Register.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);
}
else {
Intent i = new Intent(_context, UserProfile.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("login", false);
}
}
mainactivity部分我调用register.java
case R.id.ic_register:
// session= GlobalContext.getInstance().getSession();
// session.checkLogin();
session.checkLogin();
Toast.makeText(this, "Create a new account please", Toast.LENGTH_SHORT).show();
//Intent intent = new Intent(this, Register.class);
//startActivity(intent);
return true;
寄存器
SessionManager session;
Button btnLogin;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.register);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
final AlertDialogManager alert = new AlertDialogManager();
session= GlobalContext.getInstance().getSession();
usernam = (EditText) findViewById(R.id.username);
passw = (EditText) findViewById(R.id.password);
email = (EditText) findViewById(R.id.email);
Toast.makeText(getApplicationContext(), "User Login Status: " + session.isLoggedIn(), Toast.LENGTH_LONG).show();
btnLogin = (Button) findViewById(R.id.login);
btnLogin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// Get username, password from EditText
String username = usernam.getText().toString();
String password = passw.getText().toString();
// Check if username, password is filled
if(username.trim().length() > 0 && password.trim().length() > 0){
// For testing puspose username, password is checked with sample data
// username = test
// password = test
if(username.equals("test") && password.equals("test")){
// Creating user login session
// For testing i am stroing name, email as follow
// Use user real data
session.createLoginSession("test", "test");
// Staring MainActivity
Intent i = new Intent(getApplicationContext(), MainActivity.class);
startActivity(i);
finish();
}else{
// username / password doesn't match
alert.showAlertDialog(Register.this, "Login failed..", "Username/Password is incorrect", false);
}
}else{
// user didn't entered username or password
// Show alert asking him to enter the details
alert.showAlertDialog(Register.this, "Login failed..", "Please enter username and password", false);
}
}
});
}
答案 0 :(得分：0)
您需要执行提交，以便优先保存价值 所以在添加任何内容后写 editor.commit（），请检查更新的方法
public void checkLogin(){
// Check login status
editor.putBoolean("login", true);// even if add true it will return false
editor.commit();
if(!this.isLoggedIn()){
Toast.makeText(_context, " Login", Toast.LENGTH_SHORT).show();