为什么我按下按钮后我的应用程序停止运行

debugcn 发表于 Dev

乔治爵士

这是我注册用户的方式..虽然注册成功，但它没有向数据库发送任何内容

private void registerUser(){



        //getting email and password from edit texts
        String email = editTextEmail.getText().toString().trim();
        String password  = editTextPassword.getText().toString().trim();

        //checking if email and passwords are empty
        if(TextUtils.isEmpty(email)){
            Toast.makeText(this,"Please enter email",Toast.LENGTH_LONG).show();
            return;
        }

        if(TextUtils.isEmpty(password)){
            Toast.makeText(this,"Please enter password",Toast.LENGTH_LONG).show();
            return;
        }

        //if the email and password are not empty
        //displaying a progress dialog

        progressDialog.setMessage("Registering Please Wait...");
        progressDialog.show();


        //creating a new user
        firebaseAuth.createUserWithEmailAndPassword(email, password)
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        //checking if success
                        if(task.isSuccessful()){
                            finish();
                            startActivity(new Intent(getApplicationContext(), ProfileActivity.class));
                        }else{
                            //display some message here
                            Toast.makeText(MainActivity.this,"Registration Error",Toast.LENGTH_LONG).show();
                        }
                        progressDialog.dismiss();
                    }
                });

    }

这是我的login.activity。我可以正常登录，但我想知道此代码用于登录用户的意义是什么？

private void userLogin(){
    String email = editTextEmail.getText().toString().trim();
    String password  = editTextPassword.getText().toString().trim();


    //checking if email and passwords are empty
    if(TextUtils.isEmpty(email)){
        Toast.makeText(this,"Please enter email",Toast.LENGTH_LONG).show();
        return;
    }

    if(TextUtils.isEmpty(password)){
        Toast.makeText(this,"Please enter password",Toast.LENGTH_LONG).show();
        return;
    }

    //if the email and password are not empty
    //displaying a progress dialog

    progressDialog.setMessage("Registering Please Wait...");
    progressDialog.show();

    //logging in the user
    firebaseAuth.signInWithEmailAndPassword(email, password)
            .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {
                    progressDialog.dismiss();
                    //if the task is successfull
                    if(task.isSuccessful()){
                        //start the profile activity
                        finish();
                        startActivity(new Intent(getApplicationContext(), ProfileActivity.class));
                    }
                }
            });

}

乌玛尔塔

像这样改变你的人的阶级

    public class Person {

    private String Username;
    private String Email;

    public Person(String email,String userName) {
     this.Username=userName;
     this.Email=email;

      /*Blank default constructor essential for Firebase*/
    }
    //Getters and setters
    public String getUsername() {
        return Username;
    }

    public void setUsername(String Username) {
        this.Username = Username;
    }

    public String getEmail() {
        return Email;
    }

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

然后像这样使用它

 Person person=new Person();
 person.setUsername(Username);
 person.setEmail(Email);
 Firebase newRef = ref.child("Users").push();
 newRef.setValue(person);

然后用它来获取价值

 newRef.addChildEventListener(new ChildEventListener() {
            @Override
            public void onChildAdded(DataSnapshot dataSnapshot, String s) {
               Person person = dataSnapshot.getValue(Person.class);
 String string = "Username: "+person.getName()+"\nEmail: "+person.getEmail()+"\n\n";

            }

            @Override
            public void onChildChanged(DataSnapshot dataSnapshot, String s) {

            }

            @Override
            public void onChildRemoved(DataSnapshot dataSnapshot) {

            }

            @Override
            public void onChildMoved(DataSnapshot dataSnapshot, String s) {

            }

            @Override
            public void onCancelled(FirebaseError firebaseError) {

            }
        });

本文收集自互联网，转载请注明来源。

如有侵权，请联系[email protected] 删除。