I have an application in which I have to implement a "Login" activity. I have these components:
I want that my application to remember the login details of the user once the user has logged in until the user would press the "log out" button. I'm not using preferences in my xml.
How do I get the getSharedPreferences(String name, int mode) to work in my application?
First get the instance of SharedPreferences using
SharedPreferences userDetails = context.getSharedPreferences("userdetails", MODE_PRIVATE);
Now to save the values in the SharedPreferences
Editor edit = userDetails.edit();
edit.putString("username", username.getText().toString().trim());
edit.putString("password", password.getText().toString().trim());
edit.apply();
Above lines will write username and password to preference
Now to to retrieve saved values from preference, you can follow below lines of code
String userName = userDetails.getString("username", "");
String password = userDetails.getString("password", "");
(NOTE: SAVING PASSWORD IN THE APP IS NOT RECOMMENDED. YOU SHOULD EITHER ENCRYPT THE PASSWORD BEFORE SAVING OR SKIP THE SAVING THE PASSWORD)