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 uninstall the application similar to gmail in android.

Answer 1

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

Answer 2

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;     } }