Изменение значения общего предпочтения на null для других имен входа

Question

Поэтому меня беспокоит то, что я использую Shared Preference для сохранения имени в Android и также могу получить то же самое при повторном входе в систему. Но когда какой-то другой человек входит в систему с того же устройства, сохраненное имя остается прежним. пользователь. Как я могу изменить это и получить значение New user name из firebase? P.S. Я новичок в Android

Ниже приведен мой код для входа в систему: -

public class ManualLogin extends AppCompatActivity implements View.OnClickListener{

private Button buttonRegister;
private EditText editTextEmail;
private EditText editTextPassword;
private TextView textViewSignup;
private EditText editTextName;

DatabaseReference databaseUsers;

private ProgressDialog progressDialog;

private FirebaseAuth firebaseAuth;

private static final String TAG = "FACELOG";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_manual_login);

    databaseUsers = FirebaseDatabase.getInstance().getReference("Users");

    firebaseAuth = FirebaseAuth.getInstance();

    if(firebaseAuth.getCurrentUser()!=null){
        //profile activity here
        finish();
        startActivity(new android.content.Intent(getApplicationContext(), AccountActivity.class));

}

    progressDialog = new ProgressDialog(this);

    buttonRegister = (Button)findViewById(R.id.buttonRegister);
    editTextEmail = (EditText)findViewById(R.id.editTextEmail);
    editTextPassword = (EditText)findViewById(R.id.editTextPassword);
    editTextName = (EditText)findViewById(R.id.editTextName);

    textViewSignup = (TextView)findViewById(R.id.textViewSignup);


    buttonRegister.setOnClickListener(this);
    textViewSignup.setOnClickListener(this);
}


public void registerUser() {
    String email = editTextEmail.getText().toString().trim();
    String password = editTextPassword.getText().toString().trim();
    final String name = editTextName.getText().toString().trim();


    if(!TextUtils.isEmpty(name)) {

        String id = databaseUsers.push().getKey();

        Users users = new Users(id, name);

        databaseUsers.child(id).setValue(users);

        //Toast.makeText(this, "User Created", Toast.LENGTH_SHORT).show();


    }else{
        //email is empty
        Toast.makeText(this, "Enter Name", Toast.LENGTH_SHORT).show();

        //stop function execution
        return;
    }


    if(TextUtils.isEmpty(email)){
        //email is empty
        Toast.makeText(this, "Enter Email id", Toast.LENGTH_SHORT).show();

        //stop function execution
        return;
    }

    if(TextUtils.isEmpty(password)){
        //password is empty
        Toast.makeText(this, "Enter Password", Toast.LENGTH_SHORT).show();

        //stop function execution
        return;
    }

    //if validations are fine
    //show progressBar


    progressDialog.setMessage("Registering User...");
    progressDialog.show();


    firebaseAuth.createUserWithEmailAndPassword(email, password).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
        @Override
        public void onComplete(@NonNull Task<AuthResult> task) {

            if(task.isSuccessful()){
                //user is successfully registered & logged in

        //profile activity here
        finish();
        startActivity(new android.content.Intent(getApplicationContext(), AccountActivity.class));

                userProfile();
                Toast.makeText(ManualLogin.this, "Registered Successfully", Toast.LENGTH_SHORT).show();

            }
            else{
                Toast.makeText(ManualLogin.this, "Failed to Register", Toast.LENGTH_SHORT).show();
            }
            progressDialog.dismiss();


            SharedPreferences sharedPref = getSharedPreferences("userName", Context.MODE_PRIVATE);

            SharedPreferences.Editor editor = sharedPref.edit();
            editor.putString("name", editTextName.getText().toString());
            editor.commit();

            //Toast.makeText(ManualLogin.this, "Name Saved", Toast.LENGTH_SHORT).show();


        }
    });

}
//set User Display name
private void userProfile(){
    FirebaseUser user = firebaseAuth.getCurrentUser();
    if(user != null){
        UserProfileChangeRequest profileUpdate = new UserProfileChangeRequest.Builder()
                .setDisplayName(editTextName.getText().toString().trim()).build();

        user.updateProfile(profileUpdate).addOnCompleteListener(new OnCompleteListener<Void>() {
            @Override
            public void onComplete(@NonNull Task<Void> task) {
                if(task.isSuccessful()){
                    Log.d("Testing", "User Profile Updated");
                }
            }
        });
    }
}
@Override
public void onClick(View v) {

    if(v == buttonRegister){
        registerUser();
    }

    if(v == textViewSignup){
        //open login activity
        finish();
        startActivity(new android.content.Intent(this, LoginActivity.class));

    }
}
}

Ниже приведен код для AccountActivity: -

public class AccountActivity extends AppCompatActivity {

private Button logout;

private TextView textViewUserName;

private FirebaseAuth mAuth;

private FirebaseAuth firebaseAuth;

private String s;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_account);

    logout = (Button)findViewById(R.id.logout);
    textViewUserName = (TextView)findViewById(R.id.textViewUserName);

    // Initialize Firebase Auth
    mAuth = FirebaseAuth.getInstance();

    firebaseAuth = FirebaseAuth.getInstance();





    if(firebaseAuth.getCurrentUser() == null){
        finish();
        startActivity(new Intent(this, LoginActivity.class));


}

    FirebaseUser sname = firebaseAuth.getCurrentUser();
    textViewUserName.setText("Welcome "+ sname.getDisplayName());






    SharedPreferences sharedPref = getSharedPreferences("userName", Context.MODE_PRIVATE);

    String name = sharedPref.getString("name", "");

    textViewUserName.setText("Welcome "+ name);
logout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            mAuth.signOut();

            LoginManager.getInstance().logOut();

            updateUI();
 @Override
public void onStart() {
    super.onStart();
    // Check if user is signed in (non-null) and update UI accordingly.
    FirebaseUser currentUser = mAuth.getCurrentUser();

    if (currentUser == null) {
        updateUI();
    }

}

private void updateUI() {

    Toast.makeText(this, "You have Logged out", Toast.LENGTH_SHORT).show();

    Intent accountIntent = new Intent(this, MainActivity.class);
    startActivity(accountIntent);
    finish();
}
}

Answer 1

при входе в это время сохраняйте данные в sharedpreference, как показано ниже:

 private void saveData(String value){
    SharedPreferences sharedPreferences=getSharedPreferences("MyData",MODE_PRIVATE);
    SharedPreferences.Editor editor=sharedPreferences.edit();
    editor.putString("User",value);
    editor.commit();

}

In считывает новые пользовательские данные в базу данных firebase.

private void readData() {
    // define only root node.
    mFirebaseDatabase.child("User").addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            //for(DataSnapshot singleSnapshot : dataSnapshot.getChildren()){
            User user = dataSnapshot.getValue(User.class);
            mEtPwd.setText(user.pwd);
            mEtName.setText(user.name);
            mEtEmail.setText(user.email);
            saveData(user.name);
            // }
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
            Log.e(TAG, "onCancelled", databaseError.toException());
        }
    });

}