Logging user out Java

I am creating a social app with a login/Registration system and I am having trouble logging the user out.

When I click the logout button I want to unset the username and clear the entire session of the user so that they go back to the LoginActivity class. Right now when I go to the profile activity and click logout I go straight back to the Home Activity which is only suppose to be for user who are logged in. I've been trying since yesterday and still nothing. Can someone help me ?

Login activity:

//SharedPreferences preferences;
private ProgressDialog loadingBar;
private Button LoginButton;
private EditText LoginUsername, LoginPassword;
private TextView NeedNewAccountLink;
private static final String PREF_LOGIN = "LOGIN_PREF";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
//SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(PREF_LOGIN, MODE_PRIVATE);
SharedPreferences sharedPreferences = getSharedPreferences(PREF_LOGIN, MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
}
LoginButton = (Button) findViewById(R.id.login_button);
LoginUsername = (EditText) findViewById(R.id.login_username);
LoginPassword = (EditText) findViewById(R.id.login_password);
NeedNewAccountLink = (TextView) findViewById(R.id.need_new_account_link);
loadingBar = new ProgressDialog(this);
editor.putString("username", String.valueOf(LoginUsername));
editor.putString("pw", String.valueOf(LoginPassword));
editor.apply();
if (LoginUsername != null) {
editor.remove("username");
editor.remove(String.valueOf(sharedPreferences));
editor.remove("pw");
editor.clear();
editor.apply();
SendUserToHomeActivity();
}
private void SendUserToHomeActivity() {
Intent mainIntent = new Intent(LoginActivity.this, HomeActivity.class);
mainIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(mainIntent);
finish();
}
public void OnLogin(View view) {
String username = LoginUsername.getText().toString();
String pw = LoginPassword.getText().toString();
String type = "login";
BackgroundWorker backgroundWorker = new BackgroundWorker(this);
backgroundWorker.execute(type, username, pw);
}

profile activity:

    LogoutButton.setOnClickListener(view -> {
PreferenceManager.getDefaultSharedPreferences(getBaseContext()).edit().clear().apply();
sharedPreferences.edit().remove("username").apply();
sharedPreferences.edit().remove("pw").apply();
editor.remove("username");
editor.remove("pw");
editor.clear();
editor.apply();
finish();
Intent intent = new Intent(ProfileActivity.this, LoginActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
});

LogoutButton.setOnClickListener(view -> {
PreferenceManager.getDefaultSharedPreferences(getBaseContext()).edit().clear().apply();
sharedPreferences.edit().remove("username").apply();
sharedPreferences.edit().remove("pw").apply();
editor.remove("username");
editor.remove("pw");
editor.clear();
editor.apply();
Intent intent = new Intent(ProfileActivity.this, LoginActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
});

Remove the Intent.FLAG_ACTIVITY_CLEAR_TOP flag will solve your problem. Please refer to this link.

I believe to get text from edit text you need
> LoginUsername.getText().toString()

and Checking EditText "LoginUsername" against If condition will never yield null unless
it points to wrong ID

Try proceeding with appropriate changes in below code block

    LoginUsername = (EditText) findViewById(R.id.login_username);
LoginPassword = (EditText) findViewById(R.id.login_password);
NeedNewAccountLink = (TextView) findViewById(R.id.need_new_account_link);
loadingBar = new ProgressDialog(this);
editor.putString("username", String.valueOf(LoginUsername));
editor.putString("pw", String.valueOf(LoginPassword));
editor.apply();
if (LoginUsername != null) {
editor.remove("username");
editor.remove(String.valueOf(sharedPreferences));
editor.remove("pw");
editor.clear();
editor.apply();
SendUserToHomeActivity();
}