[在我的应用中，我正在使用Firebase验证用户的电话号码。但是，验证系统不一致，并且仅在第一次发送OTP。例如，我第一次登录时会收到OTP，但是如果我注销并尝试再次登录，则不会获得OTP。
这是要求用户输入OTP的活动：
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;
import com.google.firebase.FirebaseException;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.PhoneAuthCredential;
import com.google.firebase.auth.PhoneAuthProvider;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.QueryDocumentSnapshot;
import com.google.firebase.firestore.QuerySnapshot;
import com.google.firebase.iid.FirebaseInstanceId;
import com.google.firebase.iid.InstanceIdResult;
import java.util.concurrent.TimeUnit;
public class EnterOTPActivity extends AppCompatActivity {
String userPhoneNumber;
private int autoResendCount=0, resumeCount=0;
private final String ctryCode = "+91";
private String verificationId;
private FirebaseAuth mAuth;
private TextView resendOtp, enterOtpMessage, timerTV;
private ProgressDialog progressDialog;
private EditText otpField;
private boolean firstSend=true,timerOn=true;
FirebaseFirestore db;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_enter_otp);
mAuth = FirebaseAuth.getInstance();
otpField = findViewById(R.id.editTextOtp);
resendOtp = findViewById(R.id.resendOTPButton);
timerTV = findViewById(R.id.resendTimer);
userPhoneNumber = getIntent().getStringExtra("USER_MOB").trim();
sendVerificationCode(userPhoneNumber);
startResendTimer(15);
getSupportActionBar().setTitle("Verification");
resendOtp.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (!timerOn) {
startResendTimer(30);
firstSend = false;
sendVerificationCode(userPhoneNumber);
}
}
});
FloatingActionButton next = findViewById(R.id.fab2);
enterOtpMessage = findViewById(R.id.aboutotpverif);
enterOtpMessage.setText(enterOtpMessage.getText().toString() + " " + ctryCode + userPhoneNumber);
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Please wait while we check your verification code");
progressDialog.setTitle("Verification");
progressDialog.setCancelable(false);
next.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//check if otp is correct here
if (otpField.getText().toString().length() == 6) {
verifyCode(otpField.getText().toString().trim());
if(!progressDialog.isShowing())
progressDialog.show();
} else {
View parentLayout = findViewById(android.R.id.content);
Snackbar.make(parentLayout, "A valid verification code has 6 digits", Snackbar.LENGTH_SHORT)
.setAction("OKAY", new View.OnClickListener() {
@Override
public void onClick(View view) {
}
})
.setActionTextColor(getResources().getColor(android.R.color.holo_red_light))
.show();
}
}
});
}
private void verifyCode(String code) {
try {
PhoneAuthCredential credential = PhoneAuthProvider.getCredential(verificationId, code);
signInwithCredential(credential);
}
catch (Exception e) {
// code here is executed when we don't get the OTP and enter a wrong one
progressDialog.dismiss();
progressDialog.setCancelable(true);
View parentLayout = findViewById(android.R.id.content);
Snackbar.make(parentLayout, getString(R.string.incorrect_code_t1), Snackbar.LENGTH_LONG)
.setAction("OKAY", new View.OnClickListener() {
@Override
public void onClick(View view) {
}
})
.setActionTextColor(getResources().getColor(android.R.color.holo_red_light))
.show();
if(progressDialog.isShowing())
progressDialog.dismiss();
}
}
private void signInwithCredential(PhoneAuthCredential credential) {
mAuth.signInWithCredential(credential).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
isRegisteredUser();
}
else {
if(progressDialog.isShowing())
progressDialog.dismiss();
View parentLayout = findViewById(android.R.id.content);
Snackbar.make(parentLayout, "Incorrect verification code", Snackbar.LENGTH_SHORT)
.setAction("OKAY", new View.OnClickListener() {
@Override
public void onClick(View view) {
}
})
.setActionTextColor(getResources().getColor(android.R.color.holo_red_light))
.show();
if(progressDialog.isShowing())
progressDialog.dismiss();
}
}
});
}
private void sendVerificationCode(String number) {
final String phoneNumber = ctryCode + number;
PhoneAuthProvider.getInstance().verifyPhoneNumber(
phoneNumber, // Phone number to verify
120, // Timeout duration
TimeUnit.SECONDS, // Unit of timeout
this, // Activity (for callback binding)
mCallbacks); // OnVerificationStateChangedCallbacks
}
private PhoneAuthProvider.OnVerificationStateChangedCallbacks mCallbacks = new PhoneAuthProvider.OnVerificationStateChangedCallbacks() {
@Override
public void onCodeSent(@NonNull String s, @NonNull PhoneAuthProvider.ForceResendingToken forceResendingToken) {
super.onCodeSent(s, forceResendingToken);
verificationId = s;
}
@Override
public void onVerificationCompleted(@NonNull PhoneAuthCredential phoneAuthCredential) {
String code = phoneAuthCredential.getSmsCode();
if (code != null) {
verifyCode(code);
otpField.setText(code);
if(!progressDialog.isShowing())
progressDialog.show();
}
}
@Override
public void onVerificationFailed(@NonNull FirebaseException e) {
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
};
private void isRegisteredUser() {
final String userId = ctryCode + userPhoneNumber;
db = FirebaseFirestore.getInstance();
db.collection("users")
.whereEqualTo("phone", userId)
.get()
.addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
@Override
public void onComplete(@NonNull Task<QuerySnapshot> task) {
try{
if (task.isSuccessful()) {
saveToken(userId);
for (QueryDocumentSnapshot document : task.getResult()) {
if (document.getId().equalsIgnoreCase(userId)) {
Intent startmainact = new Intent(EnterOTPActivity.this, MainActivity.class);
startmainact.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(startmainact);
finish();
return;
}
//Log.d(TAG, document.getId() + " => " + document.getData());
}
Intent startposact = new Intent(EnterOTPActivity.this, ParOrStudActivity.class);
startposact.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(startposact);
finish();
} else {
View parentLayout = findViewById(android.R.id.content);
Snackbar.make(parentLayout, "Database error: please try again", Snackbar.LENGTH_SHORT)
.setAction("OKAY", new View.OnClickListener() {
@Override
public void onClick(View view) {
}
})
.setActionTextColor(getResources().getColor(android.R.color.holo_red_light))
.show();
}
}
catch(Exception e){
View parentLayout = findViewById(android.R.id.content);
Snackbar.make(parentLayout, "Database error: please try again", Snackbar.LENGTH_SHORT)
.setAction("OKAY", new View.OnClickListener() {
@Override
public void onClick(View view) {
}
})
.setActionTextColor(getResources().getColor(android.R.color.holo_red_light))
.show();
}
}
});
}
private void saveToken(final String userId) {
FirebaseInstanceId.getInstance().getInstanceId()
.addOnCompleteListener(new OnCompleteListener<InstanceIdResult>() {
@Override
public void onComplete(@NonNull Task<InstanceIdResult> task) {
if (!task.isSuccessful()) {
return;
}
// Get new Instance ID token
String token = task.getResult().getToken();
FirebaseFirestore.getInstance().collection("users").document(userId).update("token",token);
}
});
}
@Override
protected void onResume() {
super.onResume();
if (autoResendCount<2 && resumeCount>0) {
sendVerificationCode(userPhoneNumber);
autoResendCount=autoResendCount+1;
resumeCount=resumeCount+1;
}
}
@Override
protected void onStop() {
super.onStop();
progressDialog.dismiss();
}
public void startResendTimer(int seconds) {
timerTV.setVisibility(View.VISIBLE);
resendOtp.setEnabled(false);
new CountDownTimer(seconds*1000, 1000) {
public void onTick(long millisUntilFinished) {
String secondsString = Long.toString(millisUntilFinished/1000);
if (millisUntilFinished<10000) {
secondsString = "0"+secondsString;
}
timerTV.setText(" (0:"+ secondsString+")");
}
public void onFinish() {
resendOtp.setEnabled(true);
timerTV.setVisibility(View.GONE);
timerOn=false;
}
}.start();
}
@Override
public void onBackPressed() {
// do not allow user to go back to the screen before
}
}
这种不稳定的验证系统无法提供有效的用户体验。有什么办法可以解决吗？
[您只是尝试从应用程序注销，或者可以做的另一件事是清除应用程序数据，或者可以重新安装。
如果您阅读Firebase Docs about PhoneAuthProvider，则应清楚说明：
。如果您真的想测试此行为，建议将超时减少到10或20秒。verifyPhoneNumber方法是可重入的：如果您多次调用它，例如在活动的onStart方法中，除非原始请求已超时，否则verifyPhoneNumber方法将不会发送第二条SMS。
根据您的情况，您将超时设置为120秒
此外，如果要获取超时事件，可以将onCodeAutoRetrievalTimeOut添加为PhoneAuthProvider.OnVerificationStateChangedCallbacks的一部分。我认为在该回调中将resendOtp启用为true