markharrop :
so I'm trying to follow the tutorial from firebase to allow users to login using their phone number. I've watched a tutorial video. all my code looks correct. but when i try it on my test device i receive a null pointer error...
at com.google.android.gms.common.internal.Preconditions.checkNotNull(Unknown Source)
at com.google.firebase.auth.PhoneAuthProvider.verifyPhoneNumber(Unknown Source)
at studios.p9p.chatomatic.chat_o_matic.PhoneLogin.CheckPhoneNumber(PhoneLogin.java:92)
at studios.p9p.chatomatic.chat_o_matic.PhoneLogin.access$000(PhoneLogin.java:29)
at studios.p9p.chatomatic.chat_o_matic.PhoneLogin$1.onClick(PhoneLogin.java:52)
my code for the phone login is as follows.
private EditText et_check_phone_number;
private EditText et_verify_code;
private Button btn_phone;
private Button btn_verify;
private String getPhoneNumber, getVerifactionCode;
private String mVerificationId = "";
private FirebaseAuth mAuth;
private FirebaseDatabase db;
private PhoneAuthProvider.OnVerificationStateChangedCallbacks mcallBacks;
private PhoneAuthProvider.ForceResendingToken mResendToken;
private ProgressDialog mloading;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_phone_login);
mAuth = FirebaseAuth.getInstance();
initVariables();
btn_phone.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
CheckPhoneNumber();
}
});
btn_verify.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
VerifyPhoneNumber();
}
});
}
private void initVariables() {
et_check_phone_number = findViewById(R.id.et_phonenumber);
et_verify_code = findViewById(R.id.etvarifaction);
btn_phone = findViewById(R.id.btn_phone_login);
btn_verify = findViewById(R.id.btn_phone_verify);
mloading = new ProgressDialog(this);
}
private void CheckPhoneNumber() {
getPhoneNumber = et_check_phone_number.getText().toString();
if (TextUtils.isEmpty(getPhoneNumber))
{
Toast.makeText(this, "Phone Number Field Cant Be Empty...", Toast.LENGTH_SHORT).show();
} else{
mloading.setTitle("Checking Your Phone Number");
mloading.setMessage("It Gonna Take A Second...");
mloading.setCanceledOnTouchOutside(false);
mloading.setIcon(R.mipmap.ic_launcher);
mloading.show();
PhoneAuthProvider.getInstance().verifyPhoneNumber(
getPhoneNumber, // Phone number to verify
60, // Timeout duration
TimeUnit.SECONDS, // Unit of timeout
this, // Activity (for callback binding)
mcallBacks);
}
}
mcallBacks = new PhoneAuthProvider.OnVerificationStateChangedCallbacks() {
@Override
public void onVerificationCompleted(PhoneAuthCredential phoneAuthCredential) {
signInWithPhoneAuthCredential(phoneAuthCredential);
}
@Override
public void onVerificationFailed(FirebaseException e) {
Toast.makeText(PhoneLogin.this, "Wrong Or Invalid Phone Number...", Toast.LENGTH_SHORT).show();
btn_phone.setVisibility(View.VISIBLE);
et_check_phone_number.setVisibility(View.VISIBLE);
et_verify_code.setVisibility(View.INVISIBLE);
btn_verify.setVisibility(View.INVISIBLE);
if (e instanceof FirebaseAuthInvalidCredentialsException) {
Toast.makeText(getBaseContext(), "Invalid Request " + e.toString(), Toast.LENGTH_SHORT).show();
} else if (e instanceof FirebaseTooManyRequestsException) {
Toast.makeText(getBaseContext(), "The SMS quota for the project has been exceeded " + e.toString(), Toast.LENGTH_SHORT).show();
}
}
@Override
public void onCodeSent(String verificationId,
PhoneAuthProvider.ForceResendingToken token) {
// Save verification ID and resending token so we can use them later
mVerificationId = verificationId;
mResendToken = token;
Toast.makeText(PhoneLogin.this, "Code Sent Please Check Your SMS...", Toast.LENGTH_SHORT).show();
btn_phone.setVisibility(View.INVISIBLE);
et_check_phone_number.setVisibility(View.INVISIBLE);
et_verify_code.setVisibility(View.VISIBLE);
btn_verify.setVisibility(View.VISIBLE);
}
};
}
private void VerifyPhoneNumber() {
getVerifactionCode = et_verify_code.getText().toString();
if (TextUtils.isEmpty(getVerifactionCode)){
Toast.makeText(this, "Please Enter The Code Sent To Your SMS...", Toast.LENGTH_SHORT).show();
}else{
mloading.setTitle("Checking Your Verification code ");
mloading.setMessage("Ill Be Back In A Jiffy...");
mloading.setCanceledOnTouchOutside(false);
mloading.setIcon(R.mipmap.ic_launcher);
mloading.show();
PhoneAuthCredential credential = PhoneAuthProvider.getCredential(mVerificationId, getVerifactionCode);
signInWithPhoneAuthCredential(credential);
}
}
private void signInWithPhoneAuthCredential(PhoneAuthCredential credential) {
mAuth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
mloading.dismiss();
Toast.makeText(PhoneLogin.this, "Login Successful...", Toast.LENGTH_SHORT).show();
Intent phoneloginIntent =new Intent (getBaseContext(),Home_Screen.class);
phoneloginIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(phoneloginIntent);
finish();
} else {
String mesage = task.getException().toString();
Toast.makeText(PhoneLogin.this, "Error: " + mesage, Toast.LENGTH_SHORT).show();
}
}
});
}
the "+44" i added trying to see if i was entering the wrong phone number. i tried it by adding the +44 manually into the edit text of the app first and that gave the same error..
******EDIT******
So ive removed the line inside the Auth provider that asked if the number was larger than 9 digits as it wasnt working.. also run a log to see if it capturing the phone number correctly.
Log.i("Verify_Phone_Number",getPhoneNumber);
2019-07-16 14:15:30.585 32055-32055/studios.p9p.chatomatic.chat_o_matic I/Verify_Phone_Number: +447******100 and it returns correctly
******EDIT******
Ok so on further testing if i click btn_phone before entering the phone number it works correctly, But if i simply add the phone number to the edit test first then press thebtn_phone it crashes with the above message in logcat
markharrop :
Ok so the way i solved this problem was to move the mcallbacks to the on create section of code. as shown below
setContentView(R.layout.activity_phone__login);
mAuth = FirebaseAuth.getInstance();
InitVariables();
AddPhoneNumberButtons();
mcallbacks = new PhoneAuthProvider.OnVerificationStateChangedCallbacks() {
@Override
public void onVerificationCompleted(PhoneAuthCredential phoneAuthCredential) {
signInWithPhoneAuthCredential(phoneAuthCredential);
}
@Override
public void onVerificationFailed(FirebaseException e) {
Toast.makeText(getBaseContext(), "Wrong Or Invalid Phone Number...", Toast.LENGTH_SHORT).show();
AddPhoneNumberButtons();
if (e instanceof FirebaseAuthInvalidCredentialsException) {
Toast.makeText(getBaseContext(), "Invalid Request " + e.toString(), Toast.LENGTH_SHORT).show();
} else if (e instanceof FirebaseTooManyRequestsException) {
Toast.makeText(getBaseContext(), "The SMS quota for the project has been exceeded " + e.toString(), Toast.LENGTH_SHORT).show();
}
}
@Override
public void onCodeSent(String verificationId,
PhoneAuthProvider.ForceResendingToken token) {
// Save verification ID and resending token so we can use them later
verificationid = verificationId;
mresendtoken = token;
Toast.makeText(getBaseContext(), "Code Sent Please Check Your SMS...", Toast.LENGTH_SHORT).show();
AddVerifyButtons();
}
};