Question

当我在 EditText 字段中输入电话号码并按登录时，java 代码必须验证 editText 字段是否为空。所以输入我的电话号码后，if(!phonenumber.isempty()) 总是假的，执行else语句，即“请输入号码”Toast

这是我的完整代码：

public class User_login extends AppCompatActivity {
    private EditText editTextphone;
    private Button otp_login;
    private FirebaseAuth mAuth;

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

        otp_login = (Button) findViewById(R.id.otp_login);
        editTextphone = (EditText) findViewById(R.id.editTextphone);
        String phoneNumber = editTextphone.getText().toString().trim();

        mAuth = FirebaseAuth.getInstance();

        ProgressBar progressBar = (ProgressBar) findViewById(R.id.progressBar);

        otp_login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(!phoneNumber.isEmpty()){
                    if(phoneNumber.length() == 10){

                        progressBar.setVisibility(View.VISIBLE);
                        otp_login.setVisibility(View.INVISIBLE);
                    
                        PhoneAuthOptions options = PhoneAuthOptions.newBuilder(mAuth)
                                .setPhoneNumber("+91" + phoneNumber)
                                .setTimeout(60L, TimeUnit.SECONDS)
                                .setActivity(User_login.this)
                            
                                .build();
                        PhoneAuthProvider.verifyPhoneNumber(options);
                        new PhoneAuthProvider.OnVerificationStateChangedCallbacks() {
                            @Override
                            public void onVerificationCompleted(@NonNull @org.jetbrains.annotations.NotNull PhoneAuthCredential phoneAuthCredential) {
                                progressBar.setVisibility(View.GONE);
                                otp_login.setVisibility(View.VISIBLE);
                            }

                            @Override
                            public void onVerificationFailed(@NonNull @org.jetbrains.annotations.NotNull FirebaseException e) {

                                progressBar.setVisibility(View.GONE);
                                otp_login.setVisibility(View.VISIBLE);
                                Toast.makeText(User_login.this,"Some error occured" + e.getMessage(), Toast.LENGTH_LONG).show();

                            }

                            @Override
                            public void onCodeSent(@NonNull @org.jetbrains.annotations.NotNull String s, @NonNull @org.jetbrains.annotations.NotNull PhoneAuthProvider.ForceResendingToken forceResendingToken) {
                                super.onCodeSent(s, forceResendingToken);

                                Intent intent = new Intent(getApplicationContext(),opt_verify.class);
                                intent.putExtra("phone", editTextphone.getText().toString());
                                intent.putExtra("mVerificationId", s);

                                startActivity(intent);


                            }
                        };
                    }else{
                        Toast.makeText(User_login.this,"Please enter complete number",Toast.LENGTH_LONG).show();
                    }
                }else{
                    Toast.makeText(User_login.this,"Please enter mobile number",Toast.LENGTH_LONG).show();
                }

            }
        });
    }

    @Override
    protected void onStart() {
        super.onStart();

        if(mAuth.getCurrentUser() != null){
            startActivity(new Intent(this, home_user.class));
        }
    }
}

Answer 1

您应该在 onClick Listner 中获取 EditText 输入，然后才能从 edittext 获取最新输入的值。

即

String phoneNumber = editTextphone.getText().toString().trim();

应该在内部调用：

otp_login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String phoneNumber = editTextphone.getText().toString().trim(); //like this
                if(!phoneNumber.isEmpty()){

Answer 2

你的逻辑有问题。原因是您在单击按钮之前获取文本，同时当 onCreate 方法运行时，它从 EditText 获取值。但是每次单击按钮时都需要获取值。试试这个代码：

otp_login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
    String phoneNumber = editTextphone.getText().toString().trim();
    if (!phoneNumber.isEmpty()) {
        if (phoneNumber.length() == 10) {
            //you logic or code here
        }
    }
  }
}

Firebase 电话号码身份验证错误，电话号码不可读

2 个答案: