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android - 无法检查用户是否已经存在于android firebase

问题描述

我正在创建一个 android 应用程序，通过使用来自 fire-base 的手机号码 OTP 验证来登录用户这就是数据库的样子

这是我将值“mobile”传递给 OTP 输入活动的登录活动（此处为 LoginActivity.java）

 CardView card_view = findViewById(R.id.cardView);
card_view.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {

     String mobile = editTextMobile.getText().toString().trim();

        if(mobile.isEmpty() || mobile.length() < 10){
          editTextMobile.setError("Enter a valid mobile");
            editTextMobile.requestFocus();
               return;
             }

             if(mobile.length()>10)
        {
            editTextMobile.setError("Enter a valid mobile");
            editTextMobile.requestFocus();
            return;
        }

       Intent intent = new Intent(LoginActivity.this, VerifyPhoneActivity.class);
           intent.putExtra("mobile", mobile);
              startActivity(intent);
    }
});

这是用户输入 OTP (VerifyPhoneActivity.java) 的地方。如果 OTP 正确且数据库中不存在手机号码，则用户可以去查看活动

public class VerifyPhoneActivity extends AppCompatActivity {

//These are the objects needed
//It is the verification id that will be sent to the user
private String mVerificationId;
 DatabaseReference mDatabase;

//The edittext to input the code
private EditText editTextCode;

//firebase auth object
private FirebaseAuth mAuth;
String   code;
String mobile;
String codesent;
public FirebaseAuth.AuthStateListener authListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_verify_phone);

    mAuth= FirebaseAuth.getInstance();
    mDatabase = FirebaseDatabase.getInstance().getReference();
    sendVerificationCode();

    findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            verifySignInCode();                
        }
    });
}


private void verifySignInCode()
    {

        final EditText fd = (EditText) findViewById(R.id.et1);
        String value= fd.getText().toString();

        final EditText sd = (EditText) findViewById(R.id.et2);
        String value1= sd.getText().toString();
        // int finalValue1=Integer.parseInt(value1);

        EditText td = (EditText) findViewById(R.id.et3);
        String value2= td.getText().toString();

        EditText fod = (EditText) findViewById(R.id.et4);
        String value3= fod.getText().toString();

        EditText fid = (EditText) findViewById(R.id.et5);
        String value4= fid.getText().toString();

        EditText sid = (EditText) findViewById(R.id.et6);
        String value5= sid.getText().toString();

        code = value + value1+value2+value3+value4+value5;

        PhoneAuthCredential credential = PhoneAuthProvider.getCredential(codesent, code);

        signInWithPhoneAuthCredential(credential);
    }

    private void signInWithPhoneAuthCredential(PhoneAuthCredential credential) {
    mAuth.signInWithCredential(credential)
            .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                @RequiresApi(api = Build.VERSION_CODES.KITKAT)
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {
                    if (task.isSuccessful()) {

                       DatabaseReference ref = FirebaseDatabase.getInstance().getReference();
                        FirebaseUser userid = FirebaseAuth.getInstance().getCurrentUser();

                        final String uid = userid.getUid();
                        ref.child("Users");
                        ref.child(mobile).child(uid);

                        Log.d("myTag", mobile);
                        Log.d("myTag", uid);

                        DatabaseReference userRef = FirebaseDatabase.getInstance().getReference("users");

                        ref.addListenerForSingleValueEvent(new ValueEventListener() {

                                @Override
                                public void onDataChange(DataSnapshot dataSnapshot) {
                                if (dataSnapshot.exists()) {
                                } else {

                                    Intent intent = new Intent(VerifyPhoneActivity.this, Signup.class);

                                    intent.putExtra("mobile", mobile);
                                    startActivity(intent);
                                   // Intent myIntent = new Intent(VerifyPhoneActivity.this, Signup.class);
                                   // startActivity(myIntent);

                                    Toast.makeText(getApplicationContext(), "account not exist",
                                            Toast.LENGTH_LONG).show();
                                }
                            }

                            @Override
                            public void onCancelled(DatabaseError databaseError) {

                            }
                        });
                    } else {

                        Toast.makeText(getApplicationContext(), "login faild",
                                Toast.LENGTH_LONG).show();

                        // Sign in failed, display a message and update the UI
                       // Log.w(TAG, "signInWithCredential:failure", task.getException());
                        if (task.getException() instanceof FirebaseAuthInvalidCredentialsException) {
                            // The verification code entered was invalid

                            Toast.makeText(getApplicationContext(), "OTP was wrong",
                                    Toast.LENGTH_LONG).show();

                        }
                    }
                }
            });
}

PhoneAuthProvider.OnVerificationStateChangedCallbacks mCallbacks=new PhoneAuthProvider.OnVerificationStateChangedCallbacks() {
    @Override
    public void onVerificationCompleted(PhoneAuthCredential phoneAuthCredential) {
        Toast.makeText(getApplicationContext(), "verification completed",
                Toast.LENGTH_LONG).show();
    }

    @Override
    public void onVerificationFailed(FirebaseException e) {

        Toast.makeText(getApplicationContext(), "sending faild"+e,
                Toast.LENGTH_LONG).show();
    }

    @Override
    public void onCodeSent(String s, PhoneAuthProvider.ForceResendingToken forceResendingToken) {
       // super.onCodeSent(s, forceResendingToken);


        Toast.makeText(getApplicationContext(), "sent",
                Toast.LENGTH_LONG).show();
        codesent=s;
    }
};

private void sendVerificationCode() {

    Intent intent = getIntent();
    mobile = intent.getStringExtra("mobile");

    Toast.makeText(getApplicationContext(), mobile,
            Toast.LENGTH_LONG).show();
    String phonenumber= "+91"+mobile;
    PhoneAuthProvider.getInstance().verifyPhoneNumber(
            phonenumber,        // Phone number to verify
            60,                 // Timeout duration
            TimeUnit.SECONDS,   // Unit of timeout
            this,               // Activity (for callback binding)
            mCallbacks);        // OnVerificationStateChangedCallbacks
}
}

最后是 Signup.java

public class Signup extends Activity {

String name;
String address;
String pincode;
String city;
String mobile;
DatabaseReference mDatabase;
FirebaseUser userid = FirebaseAuth.getInstance().getCurrentUser();

final String uid = userid.getUid();

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

    Intent intent = getIntent();
    mobile = intent.getStringExtra("mobile");
    findViewById(R.id.signupbutton).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(getApplicationContext(), mobile,
                    Toast.LENGTH_LONG).show();

            Log.d("myTag", mobile);
            Log.d("myTag", uid);

            EditText nameedittext = (EditText) findViewById(R.id.nametextview);
             name= nameedittext.getText().toString();

            EditText addressedittext = (EditText) findViewById(R.id.addresstextview);
            address= addressedittext.getText().toString();

            EditText pincodeedittext = (EditText) findViewById(R.id.picodetextview);
            pincode= pincodeedittext.getText().toString();

            EditText cityedittext = (EditText) findViewById(R.id.citytextview);
            city= cityedittext.getText().toString();

            DatabaseReference ref = FirebaseDatabase.getInstance().getReference();

              ref = ref.child("Users");

            ref = ref.child(mobile).child(uid);

              Map<String, String> userData = new HashMap<String, String>();

             userData.put("Name", name);
             userData.put("Address", address);
             userData.put("Pin", pincode);
             userData.put("City", city);

              ref.setValue(userData);
        }
    });
}
}

我认为这是在 verifyphoneactivity.java 中检查数据是否已经存在的问题，请帮助我

标签： androidfirebase-realtime-database

解决方案

在您的问题中显示的代码中，以下几点很突出：

  1. 创建新Signup用户时活动已登录？这意味着当您完成注册过程时，之前的 userId 用于注册用户，而不是新用户的注册用户。

  2. 您的代码同时使用"Users"和"users"- Firebase 区分大小写。

  3. 您的电话号码表单处理可能更智能并支持区号（例如+91xxxxxxxxx）。这将有利于扩展到新的区域，而不仅仅是检查 10 个数字。

  4. 上面的代码不处理验证码的自动检索。（文档）

旁注

注 1：考虑使用电话号码到用户 ID 索引/映射。您将通过他们的 userId 比他们的电话号码更频繁地引用用户，这将避免您不断地通过您的应用程序传递它。

{
  "PhoneNumbers": {
    "1234555888": "userId1",
    "1234555888": "userId2",
  },
  "Users": {
    "userId1": {
      ...
    },
    "userId2": {
      ...
    },
    ...
  }
}

注意 2： PIN 码存储不安全，应该散列/馈送到计算中，而不是以纯文本形式存储。

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