Firebase：添加到经过身份验证的用户

Question

请帮忙，我可以为我的认证用户添加值吗？

我有一个 createUser 类，我在其中创建了经过身份验证的用户。

public class CreateUserAccount extends AppCompatActivity {

    private EditText inputEmail, inputPassword;
    private Button btnSignUp;
    private FirebaseAuth auth;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_create_account);
        //Get Firebase auth instance
        auth = FirebaseAuth.getInstance();

        btnSignUp = (Button) findViewById(R.id.sign_up_button);
        inputEmail = (EditText) findViewById(R.id.email);
        inputPassword = (EditText) findViewById(R.id.password);

        startActivity(new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS));
        Toast.makeText(this, "Please turn on usage access for this app", Toast.LENGTH_LONG).show();

        btnSignUp.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String email = inputEmail.getText().toString().trim();
                String password = inputPassword.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 is too short. Please enter a minimum of 6 characters", Toast.LENGTH_SHORT).show();
                    return;
                }

                //create user
                auth.createUserWithEmailAndPassword(email, password)
                        .addOnCompleteListener(CreateUserAccount.this, new OnCompleteListener<AuthResult>() {
                            @Override
                            public void onComplete(@NonNull Task<AuthResult> task) {
                                Toast.makeText(CreateUserAccount.this, "User Account Created" + task.isSuccessful(), Toast.LENGTH_SHORT).show();

                                // 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(CreateUserAccount.this, "Authentication failed." + task.getException(),
                                            Toast.LENGTH_SHORT).show();
                                } else {
                                    startActivity(new Intent(CreateUserAccount.this, LandingPage.class));
                                    finish();
                                }
                            }
                        });



            }
        });
    }
}

经过身份验证的用户登录后，他们可以点击一个页面，在该页面上输入他们孩子的姓名，这些姓名将写入实时数据库。

public class AddChild extends AppCompatActivity {

FirebaseUser user=FirebaseAuth.getInstance().getCurrentUser();
String useruid=user.getUid();


//we will use these constants later to pass the artist name and id to another activity
public static final String ARTIST_NAME = "net.simplifiedcoding.firebasedatabaseexample.artistname";
public static final String ARTIST_ID = "net.simplifiedcoding.firebasedatabaseexample.artistid";

//view objects
EditText editChildName;
CardView addChild;
ListView lvChildren;

//a list to store all the artist from firebase database
List<Child> children;

//our database reference object
DatabaseReference databaseChildren;


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

    //getting the reference of artists node
    databaseChildren = FirebaseDatabase.getInstance().getReference("children");

    //getting views
    editChildName = (EditText) findViewById(R.id.editChildName);
    lvChildren = (ListView) findViewById(R.id.lvChildren);
    addChild = (CardView) findViewById(R.id.addChild);

    //list to store artists
    children = new ArrayList<>();


    //adding an onclicklistener to button
    addChild.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {
            //calling the method addArtist()
            //the method is defined below
            //this method is actually performing the write operation
            addChild();
        }
    });
}

/*
* This method is saving a new artist to the
* Firebase Realtime Database
* */
private void addChild() {
    //getting the values to save
    String name = editChildName.getText().toString().trim();

    //checking if the value is provided
    if (!TextUtils.isEmpty(name)) {

        //getting a unique id using push().getKey() method
        //it will create a unique id and we will use it as the Primary Key for our Artist
        String id = databaseChildren.push().getKey();

        //creating an Artist Object
        Child child = new Child(name);

        //Saving the Artist
        databaseChildren.child(id).setValue(child);

        //setting edittext to blank again
        editChildName.setText("");

        //displaying a success toast
        Toast.makeText(this, "Child added", Toast.LENGTH_LONG).show();
    } else {
        //if the value is not given displaying a toast
        Toast.makeText(this, "Please enter a name", Toast.LENGTH_LONG).show();
    }
}

}

______儿童班________

import com.google.firebase.database.IgnoreExtraProperties;

@IgnoreExtraProperties
public class Child {
    private String childName;

    public Child(){
        //this constructor is required
    }

    public Child(String childName) {
        this.childName = childName;

    }
public String getChildName() {
    return childName;
}

}

有什么方法可以添加我输入给这个用户的 addChild 类 db 值吗？

让经过身份验证的用户可以查看他们已输入的孩子姓名？谢谢

谢谢

Answer 1

是的，在您对用户进行身份验证后，您应该获得您的用户Auth ID

如果您的用户成功登录到您的应用，您应该这样做以将孩子放入您的用户中

private FirebaseAuth mAuth;
String userID;

// ...
mAuth = FirebaseAuth.getInstance();
userID = mAuth.getCurrentUser().getUid();

之后，在您发布 addChildren 类的地方，您应该调用您的用户以成功地将数据添加到未经身份验证的用户

mDatabase.child(userID).child("Name").setValue("Robert");

这是一个关于如何在您的身份验证用户中添加数据的示例。

mDatabase 是你的数据库引用，像这样

mDatabase = FirebaseDatabase.getInstance().getReference();

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