How to maintain session in android?

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 uninstall the application similar to gmail in android.

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Make one class for your SharedPreferences

public class Session {

    private SharedPreferences prefs;

    public Session(Context cntx) {
        // TODO Auto-generated constructor stub
        prefs = PreferenceManager.getDefaultSharedPreferences(cntx);
    }

    public void setusename(String usename) {
        prefs.edit().putString("usename", usename).commit();
    }

    public String getusename() {
        String usename = prefs.getString("usename","");
        return usename;
    }
}

Now after making this class when you want to use it, use like this: make object of this class like

private Session session;//global variable 
session = new Session(cntx); //in oncreate 
//and now we set sharedpreference then use this like

session.setusename("USERNAME");

now whenever you want to get the username then same work is to be done for session object and call this

session.getusename();

Do same for password

---

You can achieve this by using Account Manager -click here 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 retrive 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;

    }

}

---

You can use a boolean value in the SharedPreferences.

Load it before login to check if login is needed.

Save it after login.

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