How to maintain session in android?

Question

Can anybody tell me how to maintain session for a user login. For example when the user sign- in to an application they have to be signed in unless the user logouts or unin

Answer 1

You can achieve this by using AccountManager.

Code Sample

// method to add account..
private void addAccount(String username, String password) {
    AccountManager accnt_manager = AccountManager
            .get(getApplicationContext());

    Account[] accounts = accnt_manager
            .getAccountsByType(getString(R.string.account_type)); // account name identifier.

    if (accounts.length > 0) {
        return;
    }

    final Account account = new Account(username,
            getString(R.string.account_type));

    accnt_manager.addAccountExplicitly(account, password, null);

    final Intent intent = new Intent();
    intent.putExtra(AccountManager.KEY_ACCOUNT_NAME, username);
    intent.putExtra(AccountManager.KEY_PASSWORD, password);
    intent.putExtra(AccountManager.KEY_ACCOUNT_TYPE,
            getString(R.string.account_type));
    // intent.putExtra(AccountManager.KEY_AUTH_TOKEN_LABEL,
    // PARAM_AUTHTOKEN_TYPE);
    intent.putExtra(AccountManager.KEY_AUTHTOKEN, "token");
    this.setAccountAuthenticatorResult(intent.getExtras());
    this.setResult(RESULT_OK, intent);
    this.finish();
}

// method to retrieve account.
private boolean validateAccount() {
    AccountManagerCallback<Bundle> callback = new AccountManagerCallback<Bundle>() {

        @Override
        public void run(AccountManagerFuture<Bundle> arg0) {
            Log.e("calback", "msg");

            try {
                Bundle b = arg0.getResult();
                if (b.getBoolean(AccountManager.KEY_ACCOUNT_MANAGER_RESPONSE)) {
                    //User account exists!!..
                }    
            } catch (OperationCanceledException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (AuthenticatorException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    };

    AccountManager accnt_manager = AccountManager
            .get(getApplicationContext());

    Account[] accounts = accnt_manager
            .getAccountsByType(getString(R.string.account_type));

    if (accounts.length <= 0) {
        return false;
    } else {
        loginNameVal = accounts[0].name;
        loginPswdVal = accnt_manager.getPassword(accounts[0]);
        return true;
    }
}

Answer 2

Source Code

https://drive.google.com/open?id=0BzBKpZ4nzNzUcUZxeHo0UnJ5UHc

Fetch Previous Login ID in android

**After Login save Email ID is SharedPreferences** 

    emaidId = et_Email.getText().toString().trim();

    SharedPreferences ss = getSharedPreferences("loginSession_key", 0);
    Set<String> hs = ss.getStringSet("set", new HashSet<String>());
    hs.add(emaidId);
    SharedPreferences.Editor edit = ss.edit();
    edit.clear();
    edit.putStringSet("set", hs);
    edit.commit();

===================onCreate()====================
===================AutoCompleteTextView set Adapter===================

**Fetch PRevious Login Email id in email EditText**

SharedPreferences sss = getSharedPreferences("loginSession_key", 0);            // todo loginSession_key   key name ALWAYS SAME
Log.i("chauster", "2.set = " + sss.getStringSet("set", new HashSet<String>()));
Log.e("Session", "Value->" + sss.getStringSet("set", new HashSet<String()));
ArrayList<String> al = new ArrayList<>();
al.addAll(sss.getStringSet("set", new HashSet<String>()));
//Creating the instance of ArrayAdapter containing list of language names
ArrayAdapter<String> adapter = new ArrayAdapter<String>
                (this, android.R.layout.select_dialog_item, al);
//Getting the instance of AutoCompleteTextView
et_Email.setThreshold(1);//will start working from first character
et_Email.setAdapter(adapter);//setting the adapter data into the 

Answer 3

You can use a boolean value in the SharedPreferences.

Load it before login to check if login is needed.

Save it after login.

Answer 4

Use SharedPreferences. Code to save a value to sharedpreferences:

SharedPreferences sp=getSharedPreferences("key", Context.MODE_PRIVATE);
SharedPreferences.Editor ed=sp.edit();
ed.putInt("value", your_value);
ed.commit();

Code to get value from sharedpreferences:

SharedPreferences sp=getSharedPreferences("key", Context.MODE_PRIVATE);
int value = sp.getInt("value", default_value);

You can check login and logout by using this value.

Answer 5

I have one simple way rather than maintain a session.

i.e. Just store one boolean variable with your username and password. by default set value equal to false.

After first successful login make its value to true.

Then just check its value on your Mainactivity, if it is true then jump to next activity otherwise jump to login activity.

Answer 6

save the user data in shared preferences till the user logs out. once user logs out clear the data from shared preferences.