java - Android firebase 实时写入新用户

Question

编辑:你们能教我如何在包中添加用户类吗？我不知道怎么办

你好，我是这方面的初学者，但我能问一下为什么 writenewuser User user = new user 说无法解析符号用户吗？我打算在数据库上添加登录详细信息，然后在它们上设置一个值 1 或 2，这样我就可以选择注册用户想要去的仪表板。但是我很困惑，因为每次我使用 public void writenewuser 搜索指南或示例时。 “User user = new user”代码总是报错“Cannot resolve symbol User”

public class signup extends AppCompatActivity {
private EditText inputEmail, inputPassword, inputName;
private Button btnSignIn, btnSignUp, btnResetPassword;
private ProgressBar progressBar;
private FirebaseAuth auth;
private DatabaseReference mFirebaseDatabase;
private FirebaseDatabase mFirebaseInstance;
private String userId;
private int type =1;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_signup);
    // Displaying toolbar icon
    getSupportActionBar().setDisplayShowHomeEnabled(true);
    getSupportActionBar().setIcon(R.mipmap.ic_launcher);
    //Get Firebase auth instance
    auth = FirebaseAuth.getInstance();
    btnSignIn = (Button) findViewById(R.id.sign_in_button);
    btnSignUp = (Button) findViewById(R.id.sign_up_button);
    inputEmail = (EditText) findViewById(R.id.email);
    inputPassword = (EditText) findViewById(R.id.password);
    inputName = (EditText) findViewById(R.id.name);
    progressBar = (ProgressBar) findViewById(R.id.progressBar);
    btnResetPassword = (Button) findViewById(R.id.btn_reset_password);

    mFirebaseInstance = FirebaseDatabase.getInstance();
    // get reference to 'users' node
    mFirebaseDatabase = mFirebaseInstance.getReference("Users");

    btnResetPassword.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            startActivity(new Intent(signup.this, ResetPasswordActivity.class));
        }
    });
    btnSignIn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            finish();
        }
    });
    btnSignUp.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            String email = inputEmail.getText().toString().trim();
            String password = inputPassword.getText().toString().trim();
            final String name = inputName.getText().toString().trim();
            if (TextUtils.isEmpty(email)) {
                Toast.makeText(getApplicationContext(), "Enter email address!", Toast.LENGTH_SHORT).show();
                return;
            }
            if (TextUtils.isEmpty(password)) {
                Toast.makeText(getApplicationContext(), "Enter password!", Toast.LENGTH_SHORT).show();
                return;
            }
            if (password.length() < 6) {
                Toast.makeText(getApplicationContext(), "Password too short, enter minimum 6 characters!", Toast.LENGTH_SHORT).show();
                return;
            }
            progressBar.setVisibility(View.VISIBLE);
            //create user
            auth.createUserWithEmailAndPassword(email, password)
                    .addOnCompleteListener(signup.this, new OnCompleteListener<AuthResult>() {
                        @Override
                        public void onComplete(@NonNull Task<AuthResult> task) {
                            Toast.makeText(signup.this, "createUserWithEmail:onComplete:" + task.isSuccessful(), Toast.LENGTH_SHORT).show();
                            progressBar.setVisibility(View.GONE);
                            // If sign in fails, display a message to the user. If sign in succeeds
                            // the auth state listener will be notified and logic to handle the
                            // signed in user can be handled in the listener.
                            if (!task.isSuccessful()) {
                                Toast.makeText(signup.this, "Authentication failed." + task.getException(),
                                        Toast.LENGTH_SHORT).show();
                            } else {
                                finish();
                                onAuthSuccess(task.getResult().getUser());
                                String user_id = auth.getCurrentUser().getUid();
                                DatabaseReference user_details =  mFirebaseDatabase.child(user_id);
                                user_details.child("name").setValue(name);
                                user_details.child("type").setValue("1");
                                Intent mainIntent = new Intent(signup.this, LoginActivity.class);
                                mainIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                                startActivity(mainIntent);

                            }
                        }

                    });


        }
        private void onAuthSuccess(FirebaseUser user) {
            String username = usernameFromEmail(user.getEmail());

            // Write new user
            writeNewUser(user.getUid(), username, user.getEmail());

            // Go to MainActivity
            startActivity(new Intent(signup.this, LoginActivity.class));
            finish();
        }
        private String usernameFromEmail(String email) {
            if (email.contains("@")) {
                return email.split("@")[0];
            } else {
                return email;
            }
        }
        private void writeNewUser(String userId, String name, String email) {
            User user = new User(name, email);

            mFirebaseDatabase.child("Users").child(userId).setValue(user);
        }

    });



}

@Override
protected void onResume() {
    super.onResume();
    progressBar.setVisibility(View.GONE);
}

Answer 1

你需要像这个例子一样创建类 User:

public class User{
private String name,email;

public User(){

 }

public User(String name, String email){
this.name=name;
this.email=email;
  }
   public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email=email;
}

}